Re: [Qgis-user] RASTER RESOLUTION REDUCING
Hi Nuno, As usual there are a number of ways to do this. Grass: r.resamp.stats as Em suggested would work, but might I also suggest the Warp tool, based on gdal_warp. This can be found by going to the Menu bar select Raster, Projections and Warp. Parameters: Input Layer Set this to the Raster you want to resample Source/Target CRS If you’re not transforming your dataset to another CRS then you can leave these alone, but you can also set these to the value of the Raster CRS Resampling method to use As you are looking for the average of the Pixel values, you can select Average here. No Data value for output Bands: Set if required Output file resolution……: This is the one of most interest to you, here you can set the resolution of the output to 2500 Reprojected: Specify the Location and Filename that you want the new Dataset to have, you can leave it blank if you like for a Temporary file to be created. Hope this helps! Kind Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional Flood Risk Management - Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: QGIS-User On Behalf Of Emma Hain via QGIS-User Sent: 14 May 2024 02:20 To: Nuno Manuel de Figueiredo de Santos Loureiro Cc: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] RASTER RESOLUTION REDUCING Hi Nuno Apologies in advance, I am no raster specialist, but perhaps try using some of the other tools such as Grass: r.resamp.stats To get the information, would the GDAL Raster Information tool<https://docs.qgis.org/3.34/en/docs/user_manual/processing_algs/gdal/rastermiscellaneous.html#raster-information> assist? Cheers Em On Tue, 7 May 2024 at 23:16, Nuno Manuel de Figueiredo de Santos Loureiro via QGIS-User mailto:qgis-user@lists.osgeo.org>> wrote: Dear all, I need to reduce the resolution of a raster, from a 30 meter pixel to a 2500 meter pixel. Performing this operation via "Creating new layers from an existing layer" and using the "Resolution" raster parameter is very easy. But the value of the new 2500 meter grids is not the average of the values of the 30 meter grids. How can I determine that in the destination grids its value is the average of the values in the original grids? Suggestions will be very welcome! Grateful, Nuno ___ QGIS-User mailing list QGIS-User@lists.osgeo.org<mailto:QGIS-User@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user -- Emma Hain — Product Manager/Senior GIS Analyst e...@north-road.com<mailto:e...@north-road.com> [https://north-road.com] North Road Cartography • Development • Spatial Analysis north-road.com<http://north-road.com> [https://ci3.googleusercontent.com/mail-sig/AIorK4xbsQ72BNIM2cWMZcuEKVer1Bwaq_gqYkdbtrjK2ifrqv-4o7aWjcvilgYXtNGpXLNgD00xgmQ]<https://twitter.com/northroadgeo>[https://ci3.googleusercontent.com/mail-sig/AIorK4zEBWGJKio8gqmFT0h_51t4ZnmoGgbmV7SeL-4FKvwWApFWDWyK7p-c0-cSskUe7pjQzjEZj9Q]<https://www.linkedin.com/company/north-road-studios>[https://ci3.googleusercontent.com/mail-sig/AIorK4wlMciFPm8hqQZB_Qi57PUCv1dJqUC1A2i9qEMzWRFLcJ7Jil30YnULdJLxT6-qMfI6J4kcac4]<https://www.facebook.com/North-Road-997236690392419/home> ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] merging parts from various raster files
Hi Sibylle, To extract the Bioregions, I suggest you utilise the option Selected features only which is a tick box below, where you select Mask layer. All you need to do is select, on the map canvas, the bioregion you want to extract. QGIS is capable of loading Tiff's I use them exclusively in any Raster work I do. The virtual raster<https://gdal.org/drivers/raster/vrt.html> is just an easy way for you to merge/mosaic the raster's (10-12 Raster's) together into a single raster. Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional Flood Risk Management - Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: QGIS-User On Behalf Of Sibylle Stöckli via QGIS-User Sent: 30 April 2024 14:10 To: 'Frank Broniewski' ; qgis-user@lists.osgeo.org; broniew...@a-a.lu Subject: Re: [Qgis-user] merging parts from various raster files Hello Frank and Richard , I have 10-12 raster files (figure 1, .tif files), they all look the same and cover the entire country with no definition of the biogeregions. Second there is the shape file defining the biogeoregions (figure 2, different colors). - Probably I first need to extract the different biogeoregions out from each raster file or define the linkage between the raster files the the biogeoregions in the shape file. However, raster - crop raster based on layer mask extracts the entire mask (entire country) not the different biogeoregions. - Furter I may delete all the data in the raster files not needed: e.g. in raster 1 just data on biogeo 1, but not the other biogeoregions, in raster 2, data on biogeo 2, but not the other biogeregions. By doing so there will be no overlap, as each raster file consists only one biogregions. - I am not sure about the virtual raster, because it is not possible to import .tif files. - Then I may just use the "merge" function - merging each bioregions. Background: postprocessing of a model output. It was not possible to run the model only for biogeoregion 1 (with input data from biogeoregion 1) , bioregion 2 (with input data from bioregion 2) etc. It was necessary to model the entire country with input data from bioregion 1 etc. Kind regards Sibylle Figure 1 [cid:image003.jpg@01DA9B0B.B9FA38E0] Figure 2 [cid:image005.jpg@01DA9B0B.B9FA38E0] From: Frank Broniewski mailto:broniew...@a-a.lu>> Sent: Tuesday, April 30, 2024 1:48 PM To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>; sibylle.stoec...@gmx.ch<mailto:sibylle.stoec...@gmx.ch> Subject: AW: [Qgis-user] merging parts from various raster files Hello Sybille, I am not sure if I understand your problem correctly. I assume, you have a mosaic of raster files (that overlap) and you want to create a single raster file for statistical analysis. In my opinion, the easiest way to achieve that is to create a virtual raster (VRT) and either use that for stats or create a new raster file from the VRT. You can find the tool in the processing toolbox. With the tool you can even define the resolution, if mixed, and how the VRT should be resampled. HTH Frank https://docs.qgis.org/3.34/en/docs/user_manual/processing_algs/gdal/rastermiscellaneous.html#build-virtual-raster Von: QGIS-User mailto:qgis-user-boun...@lists.osgeo.org>> im Auftrag von Sibylle Stöckli via QGIS-User mailto:qgis-user@lists.osgeo.org>> Gesendet: Dienstag, 30. April 2024 11:34 An: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> mailto:qgis-user@lists.osgeo.org>> Betreff: [Qgis-user] merging parts from various raster files Dear community I am working with QGIS 3.34 (Prizren) and would like to merge region 1 from raster (.tif) file 1 and region 2 from raster file 2, and... For sure I will need to use raster-miscellaneous-merge. My question is related to the pre-processing of the input raster files. - The 12 raster files all have the same coordinate system. - The raster files are fully overlapping (the entire country). - The region is not defined per se in the raster file, but in an additional shape file (biogeo.shp). - For sure I can carry out some zonal statistics using raster and shape file, but to merge the regions I need all the pixels form a regions as input file for the merging process. This process is more than just selecting regions or cropping. Do you have any suggestions? Kind regards Sibylle ___ QGIS-User mailing list QGIS-User@lists.osgeo.org<mailto:QGIS-Use
Re: [Qgis-user] Installing gdal-mrsid with osgeo4w-setup.exe command fails
Hi Simon, Not an IT person, but there are a number of formats, supported by gdal which don't, by default install. This is due to them requiring a separate licencing agreement. You will need to manually install these, in the setup app, by using the Advanced install and under Select Packages, Libs select dgal-mrsid. You can use the Search to help find it and other formats like ECW (gdal-ecw). Hope that helps, Richard -- Richard McDonnell MSc GIS, FME Certified Professional Flood Risk Management - Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Simon Gröchenig via QGIS-User Sent: 29 March 2024 07:10 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Installing gdal-mrsid with osgeo4w-setup.exe command fails Hi all, a customer installs qgis with the following command at Baramundi. path/to/osgeo4w-setup.exe<https://outlook.office.com/local/path/file:/kint01.ki.tal-oil.com/APPS/QGIS/_Deployment/osgeo4w-setup.exe> -q -A -L -l \\<https://outlook.office.com/local/path/file:/kint01.ki.tal-oil.com/apps/qgis/_Deployment/Repo/>url.com\apps\qgis\_Deployment\Repo\<https://outlook.office.com/local/path/file:/kint01.ki.tal-oil.com/apps/qgis/_Deployment/Repo/> -a x86_64 -g -k -P qgis gdal-mrsid -o -k While QGIS is installed fine, gdal-mrsid is silently failing (cannot load sid-files in QGIS). The problem occurs since upgrading to QGIS 3.36. The installation works using the setup.exe graphical app. Any ideas? Best regards Simon ___ Vermessungskanzlei Neumayr Simon Gröchenig - Geoinformation [cid:image001.jpg@01DA84F2.E484C730] Albin Egger-Str. 10 9900 Lienz Tel: +43 4852 68568 31 Mobil: +43 664 1544804 Email: groeche...@zt-gis.at<mailto:groeche...@zt-gis.at> Web: http://www.zt-gis.at/ ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Multiple styles saved in database, how to choose one?
Hi Richard, You can indeed load others. From the layer properties, select the style button, usually bottom left. Then select Load Styles, all other styles in the database will be listed there. You can select any other ones you set up for that layer from there. Kind Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional Geographical Information Systems Officer —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional Geographical Information Systems Officer —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: QGIS-User On Behalf Of Richard > Duivenvoorde via QGIS-User > Sent: 15 March 2024 10:20 > To: Qgis-user@lists.osgeo.org > Subject: [Qgis-user] Multiple styles saved in database, how to choose one? > > Hi, > > I'm busy loading a lot of datasets in a Postgis database. > > For vectordata it is possible to save the QGIS style IN the database. > Off course you can save several styles for the same table in the database. > But I fail to find a way to choose between those. > > Am I missing an option? Or is this not yet implemented? > (would be cool to have it in Browser too :-) ) > > Thanks in advance, > > Richard Duivenvoorde > > PS: I was also missing this option for Raster files (saved in Postgis). > Created a Feature Request for that one: > https://github.com/qgis/QGIS/issues/56870 > > ___ > QGIS-User mailing list > QGIS-User@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Convert .shp to CAD, with attribute values as different layers
You can also use the processing toolbox, search for split and you should be able to access the tool. -- Richard McDonnell MSc GIS, FME Certified Professional Geographical Information Systems Officer -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: Chiz Harward Sent: 13 February 2024 13:03 To: Richard McDonnell Cc: qgis-user@lists.osgeo.org Subject: RE: Convert .shp to CAD, with attribute values as different layers Thanks all, will try and do this as soon as I can get the Vector drop down list to actually drop down... is there a keyboard shortcut to get to the options? Ctrl+O isn't working Chiz Harward BA MCIfA he/him Senior Archaeologist, Urban Archaeology I work flexibly - so whilst it suits me to email now, I do not expect a response or action outside of your own working hours http://urban-archaeology.blogspot.com<http://urban-archaeology.blogspot.com/> https://www.facebook.com/urb.arch/ http://gloscross-slabs.blogspot.co.uk/ Urban Archaeology 2 Slad View, Gaineys Well, Stroud, Gloucestershire GL5 1LQ 07881 486837 c...@urban-archaeology.co.uk<mailto:c...@urban-archaeology.co.uk> Urban Archaeology is a trading name of Chiz Harward BA MCIfA From: Richard McDonnell mailto:richard.mcdonn...@opw.ie>> Sent: Tuesday, February 13, 2024 11:16 AM To: Chiz Harward mailto:c...@urban-archaeology.co.uk>> Cc: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: RE: Convert .shp to CAD, with attribute values as different layers Hi Chiz, The only thing I can think of is Split Vector Layer (Vector => Data Management) that will allow you to split your Layer by attribute, outputting a DXF for each layer. The only issue is that you will have a series of separate Layers which you will have to manually merge into a single dxf file. One other consideration would be, splitting the single layer by attribute in QGIS as separate Layers and then exporting the Project. Sorry I can't be of more help, there's probably a way, using Python, to carry out the split and write out a single DXF, but I can't help you there. Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional Geographical Information Systems Officer -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Chiz Harward via QGIS-User Sent: 13 February 2024 10:04 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] Convert .shp to CAD, with attribute values as different layers Hallo, I have a shapefile that has attributes and need to convert this to a CAD file. I can do this by export project to dxf, but it comes through with one CAD layer per shapefile. I need to have the shapefile come through as different CAD layers according to one of the attribute fields. Example: Shapefile contains many polygons, the attribute field 'colour' of each polygon can be red, blue, green etc. I need it to get it into CAD with a layer for the red polygons, one for the blue, one for green etc Running QGIS 3.16.11 Hannover Any help appreciated Chiz Harward BA MCIfA he/him Senior Archaeologist, Urban Archaeology I work flexibly - so whilst it suits me to email now, I do not expect a response or action outside of your own working hours http:/
Re: [Qgis-user] Convert .shp to CAD, with attribute values as different layers
Hi Chiz, The only thing I can think of is Split Vector Layer (Vector => Data Management) that will allow you to split your Layer by attribute, outputting a DXF for each layer. The only issue is that you will have a series of separate Layers which you will have to manually merge into a single dxf file. One other consideration would be, splitting the single layer by attribute in QGIS as separate Layers and then exporting the Project. Sorry I can't be of more help, there's probably a way, using Python, to carry out the split and write out a single DXF, but I can't help you there. Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional Geographical Information Systems Officer -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Chiz Harward via QGIS-User Sent: 13 February 2024 10:04 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Convert .shp to CAD, with attribute values as different layers Hallo, I have a shapefile that has attributes and need to convert this to a CAD file. I can do this by export project to dxf, but it comes through with one CAD layer per shapefile. I need to have the shapefile come through as different CAD layers according to one of the attribute fields. Example: Shapefile contains many polygons, the attribute field 'colour' of each polygon can be red, blue, green etc. I need it to get it into CAD with a layer for the red polygons, one for the blue, one for green etc Running QGIS 3.16.11 Hannover Any help appreciated Chiz Harward BA MCIfA he/him Senior Archaeologist, Urban Archaeology I work flexibly - so whilst it suits me to email now, I do not expect a response or action outside of your own working hours http://urban-archaeology.blogspot.com<http://urban-archaeology.blogspot.com/> https://www.facebook.com/urb.arch/ http://gloscross-slabs.blogspot.co.uk/ Urban Archaeology 2 Slad View, Gaineys Well, Stroud, Gloucestershire GL5 1LQ 07881 486837 c...@urban-archaeology.co.uk<mailto:c...@urban-archaeology.co.uk> Urban Archaeology is a trading name of Chiz Harward BA MCIfA ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Amal Kar - India - Batch conversion of files for raster layer format from geotiff to idrisi, and simultaneously from a higher pixel resolution to a lower one.
Hi,
One solution is to use Warp, found under Raster --> Projections --> Warp
(reproject)
This will allow you to specify a resolution and also change the file type.
Kind Regards,
Richard
——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw
——
To send me files larger than 30MB, please use the link below
https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie
Email Disclaimer:
https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/
——
MSc GIS, FME Certified Professional
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://https://gov.ie/opw<https://www.opw.ie>
——
Email Disclaimer:
https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/>
From: QGIS-User On Behalf Of Amal Kar via
QGIS-User
Sent: 11 January 2024 08:16
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Amal Kar - India - Batch conversion of files for raster
layer format from geotiff to idrisi, and simultaneously from a higher pixel
resolution to a lower one.
Dear Community Members,
I am currently trying to make use of a series of Raster data files from Modis
satellite sensors that are available in Geotiff format (.tif) and in the pixel
resolution of 500-m.
I downloaded the files from a USGS website, and wanted to convert each file
into an Idrisi raster format (16 bit integer elevation data in .RST & .RDC
files), and in 1-km pixel resolution.
I am using the batch convert utility in my QGIS (ver. 3.18; Zurich) within the
GDAL Toolbox, especially its "Translate (Convert Format)" utility under "Raster
Conversion".
While this utility converts all the files from .tif to .rst & .rdc very quickly
and accurately, it does not have any scope of changing the pixel resolution
(i.e., from pixel width & height of 0.00417 arc degrees for 500 m pixels to the
width & height of 0.00833 arc degrees for the desired 1-km pixels).
When i do the conversion of files individually by opening each .tif raster file
and then exporting each ("Save as") to idrisi format, it opens a new window of
"Save Raster Layer as", where the options are for changing the
"Resolution", both horizontal and vertical.
However, changing each data file through this process, especially when i am
dealing with a few hundreds of daily satellite data files, is very cumbersome.
There must be some clickable tool hidden within the Tool Box, which i am too
naive to understand and pick up (i am NOT computer-savvy, although i use it
more often for digital analysis of my earth surface data in GIS).
I shall be highly grateful if you can lead me to the appropriate tool in my
QGIS (ver. 3.18; Zurich), which can be easily followed.
Thanking You for Your patience, and with Kind Regards,
amal kar.
-- -- --
--
Dr. Amal Kar
Former Principal Scientist and Head, Division of Natural Resources &
Environment,
Central Arid Zone Research Institute, Jodhpur 342003, India
A-1/6, Baitalik Housing Society, KMDA Housing Complex,
Baghajatin (Near Hiland Park),
KOLKATA 700 094, India
Email: akarca...@gmail.com<mailto:akarca...@gmail.com>
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Re: [Qgis-user] How to convert qml style file from version 3.28.6 to 3.16.14
Hi Jaume, I'm making the assumption that your styling is saved in the Project File and not as a Style for the Layer itself. Might I suggest that you create a default style for each layer, this can easily be done by going to the Layer Properties and clicking on the Style button on the bottom Left and selecting Save as Default. This will result in a default style for the Layer so it doesn't matter what version of QGIS you use, or indeed what project you load the layer into, it will use the default style. You can also manually do this, by saving the style with the same name as the dataset. The same can be done for all layers, Vector or Raster. It will even do it for PostGIS Layers, saving the style in a new table called style in the public schema in your Database. I hope the above helps. Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Rigola C Jaume INFORMACIO DE BASE via QGIS-User Sent: 08 January 2024 13:13 To: 'qgis-user@lists.osgeo.org' Subject: [Qgis-user] How to convert qml style file from version 3.28.6 to 3.16.14 For reasons that are not relevant to this discussion I have two versions of QGIS installed on my Desktop (3.16.14-Hannover & 3.28.6-Firenze). I have realised that when a project is saved at 3.28.6-Firenze version, the symbology styles are lost if opened with QGIS 3.16.14-Hannover. I've browsed for solutions, and I read that that's an issue since version 3.22, but I couldn't find a way to solve it. Does anyone know how to save the layer stlyles on 3.28.6-Firenze so they can be recovered on 3.16.14-Hannover? (Maybe a version conversor, or a QML file conversor) Many thanks in advance, Jaume ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Reselect Features
Michael, In addition to what Nyall said, might I suggest another possible method for you doing it. Instead of selecting and deselecting, how about you use a virtual field? To sort/filter the river names. 1) Using the field calculator, create a virtual field and call it, "filter" and set all values to 1 or 0, based on something like... CASE WHEN river_name = 'SomeRiverName' THEN 1 ELSE 0 END (expression may have some errors) 2) Style your Layer using the "filter" value as your classification and set 0 as Invalid and 1 as Valid. You should then be able to see only the geometries with the valid name and spot the gaps. If instead of selecting and deselecting, you use the filter column to edit the filter attribute to 1 or 0 you can add or remove features until you have what you want. You can also set the attribute table to display only what is visible on canvas, which may also help. Hopefully the above helps Kind Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: QGIS-User On Behalf Of Michael > Edward McNeil via QGIS-User > Sent: 17 November 2023 02:48 > To: Andrea Giudiceandrea > Cc: qgis-user@lists.osgeo.org > Subject: Re: [Qgis-user] Reselect Features > > Thank you for your reply, Andrea. I'll be glad to describe the situation and > what > I'm doing. > > I'm running Qgis 3.23.3 for Windows (Windows 11), which is the regular > environment I'm now working Qgis in – though earlier I also tried 3.23.2 on > MacOS (the latter of which – Qgis for MacOS – I now believe to be a less > refined and less finished variety of Qgis, similar version number or no). > > For my particular project at present (a map I'm preparing of Roman Britain), > I'm adding rivers to the map – drawing data from a shapefile of the > "waterways" (rivers, creeks, canals, ditches, etc.) of the island of Britain > (containing something like 190,000 features!), distributed by the U.K. > government. > > The procedure I've found most convenient at present for doing so (excepting > the interference of the problem being discussed) is to copy the original > shapefile to the name of the desired river, load it as a layer, open its > Attributes > Table, turn on Editing, sort the table by name, select all features bearing > the > right river name, then (after selecting the Select Features by Area or Single > Click tool) scan through the segments and features of the intended river: 1) > deselecting the segments of a different river possessing the same name (there > are many such in Britain), 2) deselecting side segments which incorrectly bear > your intended river's name (also a lot), 3) selecting incorrectly named > segments (e.g., NULL) that if omitted would introduce gaps in the line of the > river, 4) adding to the selection creeks possessing a different name, and so > forth. Finally, invert the selection, delete all the features one didn't > select in the > process above, then save. > > It all works well – until the eventual moment when one's pressed shift or > control key momentarily fails to register, the entire laboriously selected > set of > features clears back to just the last one touched – and I pull out even more > of > my remaining hair. > > Nor does saving the layer every now and then in the middle of the process do > any good – because what features are selected or not at that instant doesn't > get remembered in the save file. > > This is the moment when it would be exceedingly nice if one could just pull > down Edit > Select > Reselect Features and thereby get back to the last > previous > selected set of features as they existed just prior to the last > keystroke/click > entered. > > But that command appears to do nothing. > > (Thanks again for your response!) > > Best, > Michael McNeil
[Qgis-user] FW: Pansharpening Problem
Apologies, I forgot to include the list in my response Grant, please see below. Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: Richard McDonnell Sent: 16 November 2023 10:19 To: Grant Boxer Subject: RE: [Qgis-user] Pansharpening Problem Hi Grant, The NoDATA values, if not specified are calculated from the source rasters. For RGB imagery, this typically is either 0 or 255, unless you are using an alpha band. You can though remove the NoDATA tag from the raster. I know of two of ways to do this. 1. Use gdal_edit with the -unsetnodata, which will modify the existing dataset. 2. Use gdal_translate to copy the raster but by using the -a_nodata and setting it to none, to remove the NoDATA tag I would suggest if using the first one, that you make a backup of the raster, just in case. I hope that helps! Kind Regards, Richard From: QGIS-User mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Grant Boxer via QGIS-User Sent: 16 November 2023 01:52 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] Pansharpening Problem I am attempting to pansharpen a PRISMA hyperspectral RGB image and I am getting areas within the image that are clipped (no data). These appear to bands with zero values in two of the three bands. Anyone have a work around or suggest how this can be avoided. I am using the gdal pansharpen tool and latest release QGIS 3.34. Cheers Grant Perth WA ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Semi Automictic Classification Plugin- Reg
Hi Rajesh, The SCP Plugin is now running using a new Python Library called "remotior-sensus", which you will have to load yourself, as it doesn't form part of the standard list of QGIS Python Library's. Further details and instillation instructions can be found HERE<https://fromgistors.blogspot.com/p/remotior-sensus.html> Kind Regards, Richard. -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Chatke Rajesh Devrao via QGIS-User Sent: 19 October 2023 10:41 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Semi Automictic Classification Plugin- Reg Dear Sir/Madam , I'm Using the QGIS latest Stable version 3.28 , I'm trying to use the SCP plugin it got install but plugin is not appearing and showing the some python error, here i attached the screenshot of the error massage plz see the attachment and kindly do the needful. Thank You With Regards, Rajesh Chatke Young Professional-II (ICM-Division) ICAR-National Academy of Agricultural Research Management (NAARM) Rajendra Nagar Hyderabad 500030 Mob: 9767729242 Off: 040-24581324 Alternate E-mail: chatke.raj...@gmail.com<mailto:chatke.raj...@gmail.com> ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] SCP Plug-In Question
Hi Molly, As you are aware, the SCP uses the polygons to create classifications. As you have already got this, you could just try Reclassify by Table. I have not tested this for your specific requirements, but you can add in rows for each classification and specify your ranges. I’m not sure of the format of the USGS signatures, nor have I any data to hand to test. I hope this helps, Kind Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— MSc GIS, FME Certified Professional —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> —— Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Molly D via QGIS-User Sent: 05 October 2023 16:52 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] SCP Plug-In Question Hi, I was wondering if it is possible to import a file containing spectral signatures to classify an image using the SCP Plug-in? I have tried importing spectral signatures from the USGS library, but it seems like I still need to draw a polygon on my image to do any kind of classification. Is there a way I can carry out spectral signature classification without manually drawing polygons and creating that training data myself? Thanks! M ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Combine raster bands in Graphical Modeller
Hi Grant, The syntax is as follows... For three separate single band Images -A input1.tif --A_band=1 -B input2.tif --B_band=1 -C input3.tif --C_band=1 ... For a single raster multiple bands... -A input1.tif --A_band=1 -B input.tif --B_band=2 -C input.tif --C_band=3 .. I hope that helps and hope the process works! Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: box...@iinet.net.au Sent: 03 October 2023 13:05 To: Richard McDonnell Subject: RE: [Qgis-user] Combine raster bands in Graphical Modeller Hi Richard, Yes, I have thought about that by putting it in the gdal command, but not sure of the correct syntax. Cheers Grant From: Richard McDonnell mailto:richard.mcdonn...@opw.ie>> Sent: Tuesday, October 3, 2023 7:15 PM To: Grant Boxer mailto:box...@iinet.net.au>> Cc: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: RE: [Qgis-user] Combine raster bands in Graphical Modeller Hi Grant, I have not tied it, but one possible solution is to use the additional command -line parameters to specify the Bands, it might be worth a try.. Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Grant Boxer via QGIS-User Sent: 03 October 2023 04:48 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] Combine raster bands in Graphical Modeller I have a multiband raster and I need to add all the ten bands together to create a one band raster file. I can do this in the raster calculator manually but cannot seem to find a way to do this using the raster calculator in the graphical modeller. There is a max of 5 bands that can be operated on at any one time. Any suggestions? Grant Boxer Perth, WA ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Combine raster bands in Graphical Modeller
Hi Grant, I have not tied it, but one possible solution is to use the additional command -line parameters to specify the Bands, it might be worth a try.. Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Grant Boxer via QGIS-User Sent: 03 October 2023 04:48 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Combine raster bands in Graphical Modeller I have a multiband raster and I need to add all the ten bands together to create a one band raster file. I can do this in the raster calculator manually but cannot seem to find a way to do this using the raster calculator in the graphical modeller. There is a max of 5 bands that can be operated on at any one time. Any suggestions? Grant Boxer Perth, WA ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] opening .sid files in QGIS
Apologies Asia for calling you Jeremy! I was looking at the wrong feed for your name. Kind Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: QGIS-User On Behalf Of Richard > McDonnell via QGIS-User > Sent: 27 September 2023 09:22 > To: Garth Fletcher ; asiajmur...@gmail.com > Cc: qgis-user@lists.osgeo.org > Subject: Re: [Qgis-user] opening .sid files in QGIS > > Hi Jeremy, > Garth is indeed right. MrSID is not open source, therefore it's not installed > by > default. > Thankfully it's easy to install, I can only give you instructions for Windows > though. > > 1) Open OSGeo4W Setup > 2) Select Advanced Install > 3) Install from Internet > 4) Keep clicking Next until you get to Select Packages > 5) In the search bar Type Mr and you should see the list drop to just Libs. > When you expand on this you will see the GDAL drivers for MrSID > 6) It will say Skip, if you click on this it will change to the current > version. > 7) Click next and it will then go through the setup process. You will be > required to accept the Licencing Agreement, but once finished you will be > able to use MrSID format. > > I hope that helps. > Kind Regards, > > Richard. > > > > > > > —— > Richard McDonnell MSc GIS, FME Certified Professional FRM Data > Management > > —— > Oifig na nOibreacha Poiblí > Office of Public Works > > Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift > Street, Trim, Co Meath, C15 NX36 —— > M +353 87 688 5964 T +353 46 942 2409 > https://gov.ie/opw > > —— > To send me files larger than 30MB, please use the link below > https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie > > Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf- > email-disclaimer/ > > > > —— > Richard McDonnell MSc GIS, FME Certified Professional FRM Data > Management > > —— > Oifig na nOibreacha Poiblí > Office of Public Works > > Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift > Street, Trim, Co Meath, C15 NX36 —— > M +353 87 688 5964 T +353 46 942 2409 > https://www.opw.ie > > —— > To send me files larger than 30MB, please use the link below > https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie > > Email Disclaimer: https://www.opw.ie/en/disclaimer/ > > -Original Message- > > From: QGIS-User On Behalf Of Garth > > Fletcher via QGIS-User > > Sent: 26 September 2023 20:31 > > To: asiajmur...@gmail.com > > Cc: qgis-user@lists.osgeo.org > > Subject: Re: [Qgis-user] opening .sid files in QGIS > > > > I have routinely opened .SID color orthophoto files for several years > > with QGIS running on a Mac. > > Currently using QGIS 3.30 under Mac OS X 10.13; I started using QGIS > > back in the 2.14 days, ~2016. > > > > I have a vague recollection of having to load a MrSID SDK, perhaps 4 > > or > > 5 years ago. > > Perhaps that installation has been persistent since I haven't had to > > do anything MrSID related since as I updated QGIS. > > If indeed a MrSID is needed, it can be found at > > <https://www.extensis.com/support/developers> > > > > -- > > Garth Fletcher > > > > ___ > > QGIS-User mailing list > > QGIS-User@lists.osgeo.org > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > ___ > QGIS-User mailing list > QGIS-User@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] opening .sid files in QGIS
Hi Jeremy, Garth is indeed right. MrSID is not open source, therefore it's not installed by default. Thankfully it's easy to install, I can only give you instructions for Windows though. 1) Open OSGeo4W Setup 2) Select Advanced Install 3) Install from Internet 4) Keep clicking Next until you get to Select Packages 5) In the search bar Type Mr and you should see the list drop to just Libs. When you expand on this you will see the GDAL drivers for MrSID 6) It will say Skip, if you click on this it will change to the current version. 7) Click next and it will then go through the setup process. You will be required to accept the Licencing Agreement, but once finished you will be able to use MrSID format. I hope that helps. Kind Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: QGIS-User On Behalf Of Garth > Fletcher via QGIS-User > Sent: 26 September 2023 20:31 > To: asiajmur...@gmail.com > Cc: qgis-user@lists.osgeo.org > Subject: Re: [Qgis-user] opening .sid files in QGIS > > I have routinely opened .SID color orthophoto files for several years with > QGIS running on a Mac. > Currently using QGIS 3.30 under Mac OS X 10.13; I started using QGIS back in > the 2.14 days, ~2016. > > I have a vague recollection of having to load a MrSID SDK, perhaps 4 or > 5 years ago. > Perhaps that installation has been persistent since I haven't had to do > anything MrSID related since as I updated QGIS. > If indeed a MrSID is needed, it can be found at > <https://www.extensis.com/support/developers> > > -- > Garth Fletcher > > ___ > QGIS-User mailing list > QGIS-User@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Does QGIS require units "m" for the projection coordinate variables in a netCDF/CF file?
Thomas, I’m open to correction on this, but meters would generally be the default unit used in GIS, when dealing with metric datasets. What units you use to measure on your Map Canvas or store as attribution is then a different thing. I had a look for the EPSG codes for EASE2 but all I could get was EPSG:6931<https://epsg.io/6931> If you look at the units there you can see meters as the UoM. I hope that helps, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— MSc GIS, FME Certified Professional —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> —— Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Thomas Lavergne via QGIS-User Sent: 15 September 2023 13:34 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Does QGIS require units "m" for the projection coordinate variables in a netCDF/CF file? Dear QGIS community, We recently released a number of sea-ice climate data records stored in netCDF/CF files. An example file is here<https://thredds.met.no/thredds/catalog/osisaf/met.no/reprocessed/ice/drift_455m_files/merged/2020/12/catalog.html?dataset=osisaf/met.no/reprocessed/ice/drift_455m_files/merged/2020/12/ice_drift_nh_ease2-750_cdr-v1p0_24h-202012211200.nc>: Our files use a polar equal area projection (EASE2) and the x / y axis values are given with units "km" (kilometers): double xc(xc) ; xc:axis = "X" ; xc:units = "km" ; xc:long_name = "x coordinate of projection (eastings)" ; xc:standard_name = "projection_x_coordinate" ; double yc(yc) ; yc:axis = "Y" ; yc:units = "km" ; yc:long_name = "y coordinate of projection (northings)" ; yc:standard_name = "projection_y_coordinate" When opening these in QGIS, they are placed correctly on the map, but the message "Unkown CRS" appears in the lower-right corner. By manipulating our files, we could get QGIS to recognize the correct CRS. ncap2 -s 'xc=xc*1000f;yc=yc*1000f' infile.nc<http://infile.nc/> outfile.nc<http://outfile.nc/> ncatted -O -a units,xc,m,c,"m" outfile.nc<http://outfile.nc/> ncatted -O -a units,yc,m,c,"m" outfile.nc<http://outfile.nc/> The NCO commands above change the x / y axis variables to units "m" (meters). The CF convention<http://cfconventions.org/Data/cf-conventions/cf-conventions-1.10/cf-conventions.html> does not impose that x / y axis variables are given with unit meters, and shows several examples using units "km". But this is apparently an issue for QGIS. Can someone please confirm that QGIS requires "meters" for these variables, and comment if this is a desired feature or if I should open a bug report at github? All the best, Thomas ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] FW: Problem with Georeferences on AutoCAD version
Hi Javier, DWG files are proprietary and can have changes between versions. For this reason, AutoCAD allows users to save there drawings to various versions including.. 2018, 2013, 2010, 2007, 2004, 2000 and R14... I've found when sending CAD data to 3rd parties that saving to an older DWG format is easier for 3rd party software to use. Usually when sending DWG I would use "AutoCAD 2000/LT2000 Drawing (*.dwg)" as my preferred output format and the same for DXF (AutoCAD 2000/LT2000 DXF (*.dxf)) Easiest solution is to go back to source of the CAD files and have them resave out to a pre-2018 version for you. Alternately there are a number of Free CAD software out there that can take in DWG, which should allow you to save it to an older version..though with post 2018 versions, they may have the same issues.. I hope this clarifies things a little. Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Javier Jimenez via QGIS-User Sent: 01 September 2023 13:36 To: qgis-develo...@lists.osgeo.org<mailto:qgis-develo...@lists.osgeo.org>; qgis-community-t...@lists.osgeo.org<mailto:qgis-community-t...@lists.osgeo.org>; qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] Problem with Georeferences on AutoCAD version Good morning, Using QGIS in version 3.28.9 and version 3.32.1 I have had the following problem. When importing a .dwg file generated by AutoCAD, the application is not able to import the file in versions later than 2018. How could I import a file from a more current version? Knowing that most AutoCAD users use current versions with the latest tools, I think it would be very useful to be able to import files from any version of AutoCAD. This error has been generated by the following steps: 1. Create a new Project 2. Import / Export 3.Import Layers from DWG/DXF 4.Drop-down window as shown in the attached image - Buenos días, Utilizando QGIS en la versión 3.28.9 y la versión 3.32.1 he tenido el siguiente problema. Al importar un archivo .dwg generado por AutoCAD, la aplicación, no es capaz de importar el archivo en versiones posteriores a la 2018. ¿Cómo podría importar un archivo de una versión más actual? Sabiendo que la mayoría de los usuarios de AutoCAD utilizan versiones actuales con las herramientas más modernas, creo que sería muy útil poder importar archivos de cualquier versión de AutoCAD. Este error se ha generado siguiendo los siguientes pasos: 1. Crear un nuevo Proyecto 2. Importar / Exportar 3. Importar Capas desde DWG/DXF 4. Ventana desplegable que aparece en la imagen adjunta Adjunto imagen del error que se ha generado. [cid:image003.png@01D9DCDB.0DE54CA0] Un saludo, Javier Jiménez [cid:image005.png@01D9DCDB.0DE54CA0] Javier Jiménez Departamento de Desarrollo Tel +34 683 554 229 Email jjime...@proyectapv.com<mailto:jjime...@proyectapv.com> Web www.proyectapv.com<http://www.proyectapv.com/> [Título: LinkedIn - Descripción: image of LinkedIn icon]<https://www.linkedin.com/in/javier-jimenez-del-val-5a1b2b216/> ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Georeference DSM files in QGIS Using Georeferencer
Hi All, It appears that, when you georeference an image which already contains reference information it in effect applies a shift to the outputs. One solution might be one of the options suggested here<https://gis.stackexchange.com/questions/237314/removing-coordinate-system-but-not-coordinates-of-raster>. The one which looks best suited for Georeferencing data wich already has a CRS applied, would appear to me to be.. gdal_translate -co PROFILE=BASELINE -co TFW=YES dem.tif dem_clean.tif It seems to reset the GeoTiff back to just a Tiff, from there you should be able to georeference it easy enough. Hope that helps! Kind Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— MSc GIS, FME Certified Professional —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> —— Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Michael Dufty via QGIS-User Sent: 28 July 2023 03:16 To: Mark C Quilter ; qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] Georeference DSM files in QGIS Using Georeferencer I had similar issues in 2021 trying to use the georeferencer on tiff files that already had a crs assigned. I did not resolve it at the time, just found a workaround, I wonder if it is still the same issue. Seemed like QGIS was picking up the control points in the image as spatial coordinates, then treating them as pixel coordinates (or vice versa). Alexis RL on this list said a proposed fix was up, but I never tested it. From: QGIS-User mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Mark C Quilter via QGIS-User Sent: Friday, July 28, 2023 2:23 AM To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Cc: Mark Quilter mailto:mquil...@utah.gov>> Subject: [Qgis-user] Georeference DSM files in QGIS Using Georeferencer I am trying to measure the amount of sediment captured in several analog beaver dams on a small wash in northern Utah. We flew the site with a drone and collected images that provided us with an orthomosaic, point cloud, and DSM (digital surface model) of the wash. Ground control points were put out and the images and elevation models came into QGIS accurately (no rectification was needed). This flight was before the analog beaver dams were installed (2021). We flew the same site last month and produced orthomosaic, point cloud, and DSM. However, we were not able to put out ground control so we needed to rectify the images in QGIS so they would align with the 20213 imagery and models. We were able to align the orthomosaic using Georeferencer ( 3.28.2). We have not been able to rectify the DSM. To attempt to rectify the DSM we used the same control points as used for the orthomosaic (the surface model was aligned with the orthomosaic). This produces a file but its location was out of the mapping area and the elevation data was no longer correct. We also used the 4 corners of the DSM for the control points in Georeferencer (these corners are the same corner extents as the rectified orthomosaic. This also produced a geotiff somewhere on earth with no elevation data. We also used the plugin Freehand Raster Georeferencer by using the 2 point method (1 point being the LL corner and the second point being the UR corner. The rectified orthomosaic that was produced the same time the DSM was made was used as the base map. Again the produced file (png) was somewhere on earth but not in the correct location and the elevation data was corrupt. I would appreciate and help with rectifying DEM and DSM files. Thanks ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] draw polygon
Hi Salvatore, You could try: 1. Selecting/Highlighting Polygon 1, which should also highlight the area you want to cut into area 4. 2. Using the Split Features tool, you can then create a cutline to clip it successfully, something like what’s shown below in green, should work. The polygons 2 and 3 shouldn’t be altered, as the Split feature tool will only alter the Selected/Highlighted Polygon 1 [cid:image001.png@01D9BEEB.9C9A7320]. Hope that helps. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— MSc GIS, FME Certified Professional —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> —— Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Prisma via QGIS-User Sent: 24 July 2023 10:59 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] draw polygon Hello, I need to draw a polygon, the blue one indicated in the figure below: [cid:image002.png@01D9BEEB.9C9A7320] I tried with the split features toll but I received an error. Any solution? Thank you. Regards, Salvatore ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Uninstalling QGIS
My Steps... 1)Use the OSGeo4W Installer to uninstall everything 2)Delete the OSGeo4w Folder 3) Delete the QGIS folders in C:\Users\...SomeUserName...\AppData\Roaming\QGIS Do a restart of the computer, which should clear most of the stuff. Then you can do a fresh Install if you require. Kind Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: QGIS-User On Behalf Of Randal > Hale via QGIS-User > Sent: 13 June 2023 15:31 > To: qgis-user@lists.osgeo.org > Subject: [Qgis-user] Uninstalling QGIS > > Not that I'm going to > > .but I was asked if there is an official "uninstall guide". A friend is > working > through some issues and basically wants to remove every bit of QGIS > (folders/registry) so it can be reinstalled. It's all in the name of trying > to fix > some oddball problems on windows 10 and not reinstall windows 10. > > Randy > > -- > Randal Hale > rjh...@northrivergeographic.com > https://www.northrivergeographic.com > > QGIS/PostGIS/Geoserver Support and Services > > ___ > QGIS-User mailing list > QGIS-User@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] DXF Export symbolLayer
Hi Simon,
Apologies, I didn't quite understand what you were trying to do. So let's start
from the beginning again.
Thank you for sending on a sample, it helps greatly to understand what you are
trying to do. Im still not 100% on what you are trying to achieve, so I have
included two separate examples based on your data.
In this first example, I will assume you are just trying to output the Layer as
a DXF with symbols and styling as you have them shown on the canvas, this can
simply be done by...
1. Selecting Project from the Menubar then Import/Export - Export Project
to DXF
2. In the next window set the Save As field set the Location you want
your DXF along with giving it a name.
3. Symbology Scale This will depend on what scales the DXF is being
printed out at, I have set 250 for the example
4. CRS, I have kept it the same as your Project
5. Layer This is the Layers you want to export, in this case sqq_subset
6. If you are only exporting only what's in Canvas view tick Export
features intersecting the current map extent, otherwise untick this to export
whole Layer
7. The only other thing I would tick in Export Labels as MTEXT if you
have labels you want in your outputs.
8. Click OK
Now if you want a DXF with two layers, Grenzpunkt and Others? You will need to
split your single Layer into multiple layers. For the purposes of this I will
assume were going for the two you have styled.
I don't know why I can't add actual columns, only virtual only seems to be
allowed
Ok, so first thing to remember is DXF is not a smart dataset, so we need to
dumb down your data a little.
To do this, we need to split the dataset into two layers, one for Grenzpunkt
and one for Others
So firstly we need to categorise all data into the Layers we want (Grenzpunkt
and Others), to do this we do something similar to what we done before. We
create a column let's call it "sgg_subset" and into this we can use the
following formula
CASE WHEN "TYP" = 20 THEN 'Grenzpunkt'
ELSE 'Others'
END
Next we use the Split vector layer tool to create however many layers we want,
in our case two. We use our layers attribute as the Unique ID field, making
sure the Add prefix to filenames is ticked (what we called our column) or
unticked, as you require. You can now specify the Output file type and the
Output directory. You can now click Run
Once this is completed, load you're newly created Layers into the Project and
style as required.
Now we can export to DXF using the tool in the first example. The difference
being we want the ONLY newly created individual layers ticked in the Layer box
If you want to improve how the styling, symbology is output, you will need to
work on the QGIS Style, modifying it to get the desired output in DXF.
Any of the steps above can be modified to suit the outputs you want.
I have attached a zip file with the updated project and the output DXF
examples, I hope it helps.
Regards,
Richard
--
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
--
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
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https://gov.ie/opw
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Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
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From: Simon Gröchenig
Sent: 12 June 2023 08:08
To: Richard McDonnell
Cc: qgis-user@lists.osgeo.org
Subject: AW: DXF Export symbolLayer
Hi Richard,
thank you for your support.
I have added a (virtual) attribute 'RefName' with a similar CASE WHEN
statement. But I don't see how this should change the DXF-output.
Some information:
* I have a point layer that I want to export to a DXF-file using the
native:dxfexport algorithm.
* This layer has a categorized renderer.
* For the DXF export, I also set a field ("sgg_code" is my case) to split
the features into several DXF-layers.
* Now I also have a field "RefName".
* The RefName corresponds with the expression used for the categorized
rendering.
* And the RefName does NOT match the field "sgg_code" used for the
DXF-split.
* I want to use the RefName (or labels set in categorized renderer) values
instead of symbolLayer0, symbolLayer1, ...
Re: [Qgis-user] DXF Export symbolLayer
Hi Simon, You don't mention the field name in QGIS, but in the example below, I will use "TEST" Create a new field, giving it a name, it can be "RefName" if you like, you can then create an expression like CASE WHEN " TEST " ='symbolLayer0' THEN 'SomeOtherStringA' WHEN " TEST " ='symbolLayer1' THEN 'SomeOtherStringB' END This should look at the "TEST" Attribute and where it has 'symbolLayer0' it will output 'SomeOtherStringA' and where "TEST" is 'symbolLayer1' it will output 'SomeOtherStringB' When its complete you can delete any attributes you don't need I hope that helps, Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Simon Gröchenig via QGIS-User Sent: 09 June 2023 10:12 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] DXF Export symbolLayer Hi all, I am trying to configure a DXF export using the native:dxfexport algorithm and layer symbology. Using the categorized rendering for a vector layer results in values "symbolLayer0", "symbolLayer1", ... in the dxf-file. In Autodesk Viewer these values are the "Name", ArcMap imports these as "RefName" attribute. My question: how can I modify the values symbolLayer0, symbolLayer1, ... to another string? A third-party tool requires special values here. Best regards Simon Vermessungskanzlei Neumayr Simon Gröchenig - Geoinformation [cid:image001.jpg@01D99ADA.4ADA9F90] Albin Egger-Str. 10 9900 Lienz Tel: +43 4852-68568-31 Email: groeche...@zt-gis.at<mailto:groeche...@zt-gis.at> Web: http://www.zt-gis.at/ ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Technical specifications
Hi All, I would like to just throw my two cents in on this. If Raster processing is envisaged, push it out to 32 minimum 64 recommended and 128 if you can stretch. As for Processors, you need as many Threads as you can afford, with a good base clock. I would agree with the use of SSD I would also recommend the use of a good PCI/NVME drive for boot, operating system and software, but also a second Solid State drive for storage of data you are working on. It's best not to be processing over a network, if at all possible. Two decent screens are a must and I agree that a good Mouse and Keyboard are almost always overlooked. In relation to Operating System, Its personal preference. Both Linux and Windows are stable, with varying degrees of involvement. If you go down the windows operating system route, I would advise using the OSGeo4W installer to install everything. It keeps everything working well in one environment, installing all dependencies. It even making running GDAL or Python commands from Command line easier as it has its own OsGeo4w Shell. Updating and installing additional tools and library's is also a breeze. BIG SHOUT OUT TO THE DEVS!!! I hope that helps!! Kind Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: QGIS-User On Behalf Of Greg > Troxel via QGIS-User > Sent: 02 June 2023 11:51 > To: Sébastien LAGARDE via QGIS-User > Cc: KEITA Mamady kobélé > Subject: Re: [Qgis-user] Technical specifications > > Sébastien LAGARDE via QGIS-User writes: > > Keep in mind that I have not used QGIS in a super serious way, and haven't > even tried to figure out how much resources it needs, other that on my > desktop (a hand-me-down machine that was high end in 2014, with 24 GB > RAM), it runs fine. > > There's a huge question not asked or answered, which is about operating > system. I personally would not even consider using Windows, but that's me > :-) > > > GIS operator Workstation (standard use) > > > > * Intel i5 or higher (12th gen) or AMD equivalent > > * 16 Gb RAM > > * 512 Gb HD but only SSD or even better PCI / NVME drives > > * Small dedicated graphic card (any entry level card with 2-4 Gb of > dedicated memory) > > * 1 Gb network > > This seems reasonable, but: > > Knowing how much disk one needs requires a plan of how the system is > going to to be used. With most data in a database, the question would > be then how much imagery you will have locally. > > In 2023, I can't recommend buying any computer for desktop use with > less than 32 GB of RAM. Almost always, my computers have become > unusable due to low RAM, before anything else, usually after more than > 10 years. If it is easily possible to upgrade, and there's evidence > that running QGIS and other things at once (browser, mail client, ?) > really fits in 16 GB *without any need to page anything back in*, then > maybe that's ok. But it strikes me as likely too little. (If it's > not easily possible to upgrade, buying a 16 GB computer is just plain > unwise IMHO.) > > > GIS analyst Workstation (double up) : > > > > * Intel i7or higher (12th gen) or AMD equivalent > > * 32Gb RAM > > * 1 Tb HD but only SSD or even better PCI / NVME drives > > * dedicated graphic card (4 Gb of dedicated memory) > > * 1 Gb network > > Again I might go higher in RAM. > > > And don’t forget to include in your quotations good interfaces > > (screens = min of 2*24 “, good keyboard and High DPI mouse), we tend > > to neglect them and use what comes was standard with orders but good > > large screens and a comfortable mouse does change your long term > > experience !! > > Great advice. I'm running with one monitor now but this would be a big >
Re: [Qgis-user] Click to open layer
Hi Grant,
My advice would be to have a shared drive, or network drive, which both
machines access with the same path.
But...in the absence of that, you could also modify your path if you prefer...
The Filepath attribute could be shortened/modified, and you can manually set
the start of the path. So for example..
You can set your "filepath" attribute to something like..
someRootfolder/somesubfolders/ and your action text would be
1. MACHINE1
qgis.utils.iface.addRasterLayer('C:/somefilepath/[%filepath%][%filename%]','[%filename%]')
2. MACHINE2
qgis.utils.iface.addRasterLayer('E:/someOTHERfilepath/[%filepath%][%filename%]','[%filename%]')
As long as the attributes stay the same, as in the same Root and Subfolders,
then the first path can be anything...
So for arguments sake...
1. MACHINE1
qgis.utils.iface.addRasterLayer('D:/00_DATA_VALIDATION/[%filepath%][%filename%]','[%filename%]')
2. MACHINE2
qgis.utils.iface.addRasterLayer('//some_network_host/localdrive/00_DATA_VALIDATION/[%filepath%][%filename%]','[%filename%]')
I hope that's helps.
Kind Regards,
Richard
--
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
--
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw
--
To send me files larger than 30MB, please use the link below
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--
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--
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
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https://https://gov.ie/opw<https://www.opw.ie>
--
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From: box...@iinet.net.au
Sent: 20 May 2023 00:29
To: Richard McDonnell
Subject: RE: [Qgis-user] Click to open layer
Hi Richard,
Thanks for that. Can I use a project path that points to the project folder,
something like '.\' ? I use two different machines and so it would be good to
be able to use the local address.
Cheers Grant
From: Richard McDonnell
mailto:richard.mcdonn...@opw.ie>>
Sent: Friday, May 19, 2023 11:42 PM
To: box...@iinet.net.au<mailto:box...@iinet.net.au>
Cc: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>
Subject: RE: [Qgis-user] Click to open layer
Hi Grant,
Do you mean insert a GeoTIFF in?
If that's the case, then you want the following Action..
Type: Python
Description: Add Raster to Canvas or whatever you want
Action Text:
qgis.utils.iface.addRasterLayer('[%filepath%][%filename%]','[%filename%]')
For the above to work, you will need two attributes in your Polygon, a
"filepath" and a "filename" attribute. In the fileparh is the Path to the
folder containing the GeoTiff and the filename is the name of the file you are
looking to load... so something like this...
[cid:image001.png@01D98C99.DC1C7E00]
This should then load any GeoTIFF into your Canvas.
Kind Regards,
Richard
--
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
--
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw
--
To send me files larger than 30MB, please use the link below
https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie
Email Disclaimer:
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--
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--
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
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From: QGIS-User
mailto:qgis-user-boun...@lists.osgeo.org>>
On Behalf Of Grant Boxer via QGIS-User
Sent: 19 May 2023 09:47
To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>
Subject: [Qgis-user] Click to open layer
I am sure there is a simple way to do this but I would like to click on a
polygon and get it to open a tiff file into my map canvas. Do I use an Action
and an "open" command?
Regards Grant Boxer
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Re: [Qgis-user] Click to open layer
Hi Grant,
Do you mean insert a GeoTIFF in?
If that's the case, then you want the following Action..
Type: Python
Description: Add Raster to Canvas or whatever you want
Action Text:
qgis.utils.iface.addRasterLayer('[%filepath%][%filename%]','[%filename%]')
For the above to work, you will need two attributes in your Polygon, a
"filepath" and a "filename" attribute. In the fileparh is the Path to the
folder containing the GeoTiff and the filename is the name of the file you are
looking to load... so something like this...
[cid:image001.png@01D98A70.D05A4F50]
This should then load any GeoTIFF into your Canvas.
Kind Regards,
Richard
--
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
--
Oifig na nOibreacha Poibl?
Office of Public Works
Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw
--
To send me files larger than 30MB, please use the link below
https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie
Email Disclaimer:
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--
MSc GIS, FME Certified Professional
--
Oifig na nOibreacha Poibl?
Office of Public Works
Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
M +353 87 688 5964 T +353 46 942 2409
https://https://gov.ie/opw<https://www.opw.ie>
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From: QGIS-User On Behalf Of Grant Boxer
via QGIS-User
Sent: 19 May 2023 09:47
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Click to open layer
I am sure there is a simple way to do this but I would like to click on a
polygon and get it to open a tiff file into my map canvas. Do I use an Action
and an "open" command?
Regards Grant Boxer
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Re: [Qgis-user] How I solved my "Polygon" to "Mutipoligons" problem
Andrea, I believe what Riccardo is getting at is that while an "ESRI Shapefile" (*.shp) always will have MultiPolygon as its Geometry Type, the "Polygons" within the shapefile are unique individual geometries. We have this requirement in our own organisation, in reaction to Shapefiles, there can be no Multipart Geometries. To explain a little further, we don’t allow Multiple Geometries linked by a single row in a Table, each geometry has its own row. I hope that clarifies things. Kind Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: QGIS-User On Behalf Of Andrea > Giudiceandrea via QGIS-User > Sent: 10 May 2023 14:23 > To: qgis-user@lists.osgeo.org > Cc: Andrea Giudiceandrea > Subject: Re: [Qgis-user] How I solved my "Polygon" to "Mutipoligons" > problem > > > Riccardo riccardopani at hotmail.com > > Wed May 10 01:10:00 PDT 2023 > > > The problem was that the shape file I created, had the “multipoligon” > property while in those of the standard delivery there was the simple > “polygon” property . > > Based on what you told me, this property cannot be changed in a shape file > already created. > > Hi Riccardo, > this make no sense to me. > If with "shape file" you actually mean "ESRI Shapefile" (*.shp), then, as > previously written, an ESRI Shapefile polygon layer is always a MultiPolygon > layer which can always stores multi-part geometries. It is not possible to > create an ESRI Shapefile polygon layer that can store only single-part > geometries. > > Maybe with "shape file" do you mean a vector layer of a format other then > "ESRI Shapefile"? > > Best regards. > > Andrea > ___ > QGIS-User mailing list > QGIS-User@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] [pyqgis] create new raster
Hi Andrea,
Please disregard my last email the formula is incorrect.
Apologies..
Richard
——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw
——
To send me files larger than 30MB, please use the link below
https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie
Email Disclaimer:
https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/
——
MSc GIS, FME Certified Professional
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://https://gov.ie/opw<https://www.opw.ie>
——
Email Disclaimer:
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From: QGIS-User On Behalf Of Richard
McDonnell via QGIS-User
Sent: 09 May 2023 09:27
To: andrea antonello
Cc: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] [pyqgis] create new raster
Hi Andrea,
If you are ok substituting the method you are using for GDAL, then you can use
the following..
gdal_calc.py -A input.tif --outfile=result.tif --calc="(A>=-2000)*(A<=1500)"
--NoDataValue=-
You can also implement this in QGIS using GDAL Calculator from the Processing
Toolbox, It can also be ran as a batch in QGIS or built into a model if you
are looking to batch it or it’s something that’s regularly done.
The output type is Float32, as you are using DTM, probably with decimal places
a NoDATA value of -9999
Regards,
Richard
——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw
——
To send me files larger than 30MB, please use the link below
https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie
Email Disclaimer:
https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/
——
MSc GIS, FME Certified Professional
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://https://gov.ie/opw<https://www.opw.ie>
——
Email Disclaimer:
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From: QGIS-User
mailto:qgis-user-boun...@lists.osgeo.org>>
On Behalf Of andrea antonello via QGIS-User
Sent: 09 May 2023 07:28
To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>
Subject: [Qgis-user] [pyqgis] create new raster
Hello,
I am trying to find out the best workflow to create a new raster.
As an example I take an existing elevation model raster and loop over it to set
values between 1500 and 2000 to novalue and write the result to a new raster.
This is the only way I found to do so:
# create new raster with novalues between 1500 and 2000
dataType = dtmLayer.dataProvider().dataType(1)
crs = QgsCoordinateReferenceSystem('EPSG:3003')
params = {
'EXTENT': dtmLayer.extent(),
'TARGET_CRS': crs,
'PIXEL_SIZE': dtmLayer.rasterUnitsPerPixelX(),
'NUMBER': -.0,
# 'OUTPUT_TYPE': dataType,
'OUTPUT': QgsProcessing.TEMPORARY_OUTPUT
}
newRaster = processing.run('qgis:createconstantrasterlayer', params)['OUTPUT']
newRasterLayer = QgsRasterLayer(newRaster, 'temp', 'gdal')
newRasterProvider = newRasterLayer.dataProvider()
block = QgsRasterBlock(dataType, cols, rows)
for row in range(rows):
for col in range(cols):
point = dtmLayer.dataProvider().transformCoordinates(QgsPoint(col,
row), transformType)
value, res = dtmLayer.dataProvider().sample(QgsPointXY(point.x(),
point.y()), 1)
if res and value != -.0:
if value < 1000 or value > 2000:
block.setValue(row, col, value)
newRasterProvider.setEditable(True)
newRasterProvider.writeBlock(block, band=1)
newRasterProvider.setEditable(False)
This code has two main issues:
1. if I uncomment the line containing OUTPUT_TYPE, I am getting an error about
the type passed. But I can't find the right type needed there, it should be the
one taken from the original provider.
2. the resulting raster is scrambled as if there was a shift in the setting of
the values. But the QgsRasterBlock seems to be built correctly (rows, cols) and
the values set properly (col, row).
3. in the above example, the dtmLayer has an epsg 3033 crs and when loaded
manually into QGIS, it is recognized. But when I read the layer's metadata crs
with pyQGIS , it is not able
Re: [Qgis-user] [pyqgis] create new raster
Hi Andrea,
If you are ok substituting the method you are using for GDAL, then you can use
the following..
gdal_calc.py -A input.tif --outfile=result.tif --calc="(A>=-2000)*(A<=1500)"
--NoDataValue=-
You can also implement this in QGIS using GDAL Calculator from the Processing
Toolbox, It can also be ran as a batch in QGIS or built into a model if you
are looking to batch it or it’s something that’s regularly done.
The output type is Float32, as you are using DTM, probably with decimal places
a NoDATA value of -
Regards,
Richard
——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw
——
To send me files larger than 30MB, please use the link below
https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie
Email Disclaimer:
https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/
——
MSc GIS, FME Certified Professional
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://https://gov.ie/opw<https://www.opw.ie>
——
Email Disclaimer:
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From: QGIS-User On Behalf Of andrea
antonello via QGIS-User
Sent: 09 May 2023 07:28
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] [pyqgis] create new raster
Hello,
I am trying to find out the best workflow to create a new raster.
As an example I take an existing elevation model raster and loop over it to set
values between 1500 and 2000 to novalue and write the result to a new raster.
This is the only way I found to do so:
# create new raster with novalues between 1500 and 2000
dataType = dtmLayer.dataProvider().dataType(1)
crs = QgsCoordinateReferenceSystem('EPSG:3003')
params = {
'EXTENT': dtmLayer.extent(),
'TARGET_CRS': crs,
'PIXEL_SIZE': dtmLayer.rasterUnitsPerPixelX(),
'NUMBER': -.0,
# 'OUTPUT_TYPE': dataType,
'OUTPUT': QgsProcessing.TEMPORARY_OUTPUT
}
newRaster = processing.run('qgis:createconstantrasterlayer', params)['OUTPUT']
newRasterLayer = QgsRasterLayer(newRaster, 'temp', 'gdal')
newRasterProvider = newRasterLayer.dataProvider()
block = QgsRasterBlock(dataType, cols, rows)
for row in range(rows):
for col in range(cols):
point = dtmLayer.dataProvider().transformCoordinates(QgsPoint(col,
row), transformType)
value, res = dtmLayer.dataProvider().sample(QgsPointXY(point.x(),
point.y()), 1)
if res and value != -.0:
if value < 1000 or value > 2000:
block.setValue(row, col, value)
newRasterProvider.setEditable(True)
newRasterProvider.writeBlock(block, band=1)
newRasterProvider.setEditable(False)
This code has two main issues:
1. if I uncomment the line containing OUTPUT_TYPE, I am getting an error about
the type passed. But I can't find the right type needed there, it should be the
one taken from the original provider.
2. the resulting raster is scrambled as if there was a shift in the setting of
the values. But the QgsRasterBlock seems to be built correctly (rows, cols) and
the values set properly (col, row).
3. in the above example, the dtmLayer has an epsg 3033 crs and when loaded
manually into QGIS, it is recognized. But when I read the layer's metadata crs
with pyQGIS , it is not able to read it and tells me it is invalid.
Has anyone a hint about what I am doing wrong?
Thanks,
Andrea
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Re: [Qgis-user] Autogeneration id codes
Hi Riccardo, Have you tried, after you delete your rows, disabling editing and then enabling editing again before you add your new rows? Also have a look at this https://gis.stackexchange.com/questions/132346/is-there-a-way-of-auto-increment-for-the-id-column-in-qgis Regards, Richard. -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Riccardo via QGIS-User Sent: 02 May 2023 16:28 To: Riccardo via QGIS-User Subject: [Qgis-user] Autogeneration id codes Good morning to all, first I would like to thank Bernhard Ströbl, Richard McDonnell, Andrea Giudiceandrea and Bernd Vogelgesang for suggestions related to some of my previous posts. Now I have another problem. I have some tables already created that have a column with autogeneration id codes. >From self-generation I often don't get codes that start from 1 onwards but >start with other numbers. I made some tests and I noticed that if I create a table and add 10 lines the autogeneration creates id codes from 1 to 10. If I delete these lines to empty the table when I create a new line Qgis autogenerates that with the code 11, it seems that Qgis keeps in memory the number/id code of the created elements, and keep the numbering as a fixed counter. How can I impose a autogeneration of id codes starting from 1? Many many thanks! Best Regards. Riccardo. ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Shape file - Change "Polygon" to "Multipolygon"
Hi Riccardo, You can use the Processing Toolbox, so a search for Promote to multipart. This will create a new layer, which will have all geometries converted to multipart. Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Riccardo via QGIS-User Sent: 27 April 2023 11:07 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Shape file - Change "Polygon" to "Multipolygon" Good morning to all, I'm here again because I need another hint. I have shape file already created for a standard delivery. The geometry type of this shape file is "Polygon" and I have to change it into "Multipolygon". Is it possible? And how can I change this property in a shape file already created without creating a new one? Many many thanks! Best Regards. Riccardo. ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Opening GEOTIFF file in QGIS support request
Hi Gino, From the screengrab you forwarded to me, I am inclined to agree with Richard. The data appears to be looking fine. You, as Richard said should probably use background mapping to verify the location but besides that it looks fine. I have been on the Global Wind Atlas website, and looked at some of their documentation. The data appears to be provided at a resolution of 250m (you can verify this in the properties) which is why, when zoomed in it appears pixelated. You will need to style it to make it look similar to how it's displayed online. Also note, that on the website the data stops being displayed beyond a certain zoom level, this is to prevent issues like that you are experiencing. I hope that clarifies things. Regard's, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: QGIS-User On Behalf Of Richard > Duivenvoorde via QGIS-User > Sent: 27 April 2023 08:51 > To: ginol...@aol.com; Qgis-user@lists.osgeo.org > Subject: Re: [Qgis-user] Opening GEOTIFF file in QGIS support request > > Hi Gino (please also keep the mailing list into the loop :-) ), > > What I see in your screenshot looks fine? > I see you loaded a project in EPSG:4326 (lower right corner), and you data is > apparently also fine, as I see coordinates 32/-116 (northern Mexico, or > southern California?). > This is not what you supposed to see? Raster data (unlike aerials etc) are > squares, with one or more data value's for every square. Which historically is > shown in a white to black styling (as you can see). > You can put the OpenStreetMap beneath it, to have more reference (and an > idea about the size/precision of your data)? > > About ogrinfo.. sorry I meant gdalinfo this is a commandline too (also in the > QGIS install of Windows), which shows information about gis-data (gdalinfo > for rasters, ogrinfo for vector).. > > Or am I missing your point? > Can you share you download url from the Wind Atlas? (I see they have a lot > of types of data). And as asked: what were you hoping to see? > > Regards, > > Richard Duivenvoorde > > On 4/26/23 21:31, ginol...@aol.com wrote: > > Hi Richard, > > Thank you for your reply. It looks like I’m actually able to open the file; > however, I’m not seeing any GIS-data. Yes, it’s a GEOTIFF file. There is > annual > wind energy production sample test data in the file but after opening it in > QGIS what I see is just the screenshot below. Could this be due to an error in > creating the file? For “output of ‘ogrinfo” do you mean the file name? It’s > “gwa3_hh100m_tl10_FLH_m0_582qxe1h.tif”. This is a file download from > Global Wind Atlas. > > Screen Shot 2023-04-26 at 12.03.55 PM.png > > > > Still not quite sure what I’m doing wrong :/ Kind regards, Gino > > > > -Original Message- > > From: Richard Duivenvoorde via QGIS-User > > To: qgis-user@lists.osgeo.org > > Cc: Qgis-user@lists.osgeo.org > > Sent: Tue, Apr 25, 2023 7:44 pm > > Subject: Re: [Qgis-user] Opening GEOTIFF file in QGIS support request > > > > Hi GIno, > > > > QGIS should 'just show/open/ geotiff's fine. > > > > Can you open the geotiff in another viewer? > > If not, or uncertain, are you sure it is a GEO-tiff (that is it contains > > the spatial > info?) and not a 'normal tiff'? > > If so: can you provide the output of 'ogrinfo ? This should show > you info about the CRS/bbos/scale etc... > > > > Is the CRS (Coordinate Projection System / 'projection') of your tiff set to > the right value (comparted to your other layers or project crs)? > > > > Regards, > > > > Richard Duienvoorde > > > > On 4/25/23 21:53, Gino via QGIS-User wrote: > > > Hello, > > > Good afternoon. Just wanted to send an email to request advi
Re: [Qgis-user] Opening GEOTIFF file in QGIS support request
Hi Gino, Just to echo what Richard Duienvoorde said, QGIS should handle GeoTIFF perfectly fine. I use the format myself when working with raster's in QGIS. First question's I would ask would be: 1)Are you getting any error messages when you load the Raster? What are they?? 2)Is the Raster appearing in the Layer Panel? 3)Have you tried Dragging and dropping the Raster onto the Map Canvas? 4) As have a look at the Layer Properties, under Information. Look to see the rasters CRS, if its correct. Sometimes, the CRS isn't imbedded, resulting in it being displayed incorrectly. If you, as Richard said could share any information about the raster with us, we could be of more help. As it is we have little to go on. Kind Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: QGIS-User On Behalf Of Richard > Duivenvoorde via QGIS-User > Sent: 26 April 2023 03:45 > To: qgis-user@lists.osgeo.org > Cc: Qgis-user@lists.osgeo.org > Subject: Re: [Qgis-user] Opening GEOTIFF file in QGIS support request > > Hi GIno, > > QGIS should 'just show/open/ geotiff's fine. > > Can you open the geotiff in another viewer? > If not, or uncertain, are you sure it is a GEO-tiff (that is it contains the > spatial > info?) and not a 'normal tiff'? > If so: can you provide the output of 'ogrinfo ? This should show > you info about the CRS/bbos/scale etc... > > Is the CRS (Coordinate Projection System / 'projection') of your tiff set to > the > right value (comparted to your other layers or project crs)? > > Regards, > > Richard Duienvoorde > > On 4/25/23 21:53, Gino via QGIS-User wrote: > > Hello, > > Good afternoon. Just wanted to send an email to request advice on > opening a GEOTIFF file in QGIS. I'm trying to open a .tif file with QGIS; > however, unable to view the data and not sure why. Please let me know > best way to view this file type in QGIS. > > Thank you, > > Gino > > > > ___ > > QGIS-User mailing list > > QGIS-User@lists.osgeo.org > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > ___ > QGIS-User mailing list > QGIS-User@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Issue with displaying all rows in the attribute table in QGIS
Hi, Im not sure but maybe have a look at "Attribute table row cache". Settings, Options, Data Sources then Attribute table row cache On mine its set to 10,000 and Ive never had any issues Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: QGIS-User On Behalf Of Patrick > Dunford via QGIS-User > Sent: 29 March 2023 10:16 > To: qgis-user@lists.osgeo.org > Subject: Re: [Qgis-user] Issue with displaying all rows in the attribute > table in > QGIS > > What kind of layer are you accessing? I never see this issue on the layers I > use. > > On 29/03/23 22:01, Pinkal Sanoria via QGIS-User wrote: > > Hi Team, > > I am writing to report an issue with QGIS that I have encountered > > recently. Specifically, I have noticed that when I open the attribute > > table for a layer in QGIS, it only displays a maximum of 99 rows. This > > is problematic for me as I often work with layers that have more than > > 99 features. > > > > Name Pinkal, > > Hanoi > > Thanks > > > > ___ > > QGIS-User mailing list > > QGIS-User@lists.osgeo.org > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > ___ > QGIS-User mailing list > QGIS-User@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Geometry Error Detection
Hello all, I'm looking for some advice in relation to Geometry Error detection. We have a proprietary tool, which can validate geometries in line with OGC, which is flagging geometries as having holes outside of area. Indeed when I check the vertices I can see the issue, with the "Holes" sharing a node with the external geometry (at the edge, see image below). What I was hoping for was that we could show these same errors in QGIS. [cid:image001.png@01D960A2.4CD1B300] I've used the following QGIS tools for validation of geometries with varying degrees of success, node directly flagging the issue detected. Check Geometries Plugin:Flags error in Geometry Type, but gives little by way of explination.. Topology Checker: Flags no errors Check ValidityFlags no errors, with either QGIS or GEOS Is there a way to check geometries, a tool, python, and another application, which can validate geometries? Or a series of tools which strung together in Model Builder could flag the issues? Regards and thanks in advance, Richard. -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Problems with transformation including height values
Hi,
Just to add to what Nyall said.
See link below, which suggests a way using OGR to carry out the process you
require.
https://gis.stackexchange.com/questions/324848/transform-datum-csv-csv-using-ogr2ogr
It suggests you preform your horizontal transformation first, this can be done
in QGIS, then carry out the Vertical Transformation. This can be done in
command line, if you are on windows, the best option is to use the OSGeo4w
Shell, as all the needed environmental settings are applied.
I hope the above helps.
Maybe there is an opportunity to have QGIS preform Vertical translations, even
if these are a separate step? It’s something that would be useful for both
Raster and Vector Data.
Regards,
Richard
——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw
——
To send me files larger than 30MB, please use the link below
https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie
Email Disclaimer:
https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/
——
MSc GIS, FME Certified Professional
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://https://gov.ie/opw<https://www.opw.ie>
——
Email Disclaimer:
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From: QGIS-User On Behalf Of Nyall Dawson
via QGIS-User
Sent: 21 March 2023 10:14
To: Bo Victor Thomsen
Cc: qgis-user
Subject: Re: [Qgis-user] Problems with transformation including height values
On Tue, 21 Mar 2023, 8:06 pm Bo Victor Thomsen via QGIS-User,
mailto:qgis-user@lists.osgeo.org>> wrote:
Hi list -
I have a problem with transforming a csv file containing x,y and z values from
EPSG:4326 to EPSG:7416, i.e I want to transform the height value from LongLat/
WGS84 ellipsoid height to UTM32/Etrs89 with vertical reference DVR90.
The file look like this:
== data.csv, EPSG:4326 id: col1, x: col3, y: col2, z: col4 ==
a;55.0;12.0;42.0
b;55.05;12.0;43.0
c;55.10;12.0;44.0
d;55.15;12.0;45.0
e;55.20;12.0;46.0
===
Step 1: I import the file into QGIS using the Data Source Manager -->
"Delimited Text" and define the projection to be EPSG:4326 and to include z
values. This works and the points are shown on my map where I expect them to be
(Somewhere in the middle of Zealand, Denmark)
Step 2: I export the layer as a geojson file using "Export" --> "Save features
as.." from the layer manager and choose EPSG:7416 (UTM32/ETRS89 with DVR90 as
vertical reference. And to include z-values
The resulting file looks like this:
== data.geojson, EPSG:7416 ==
{
"type": "FeatureCollection",
"name": "data",
"crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:EPSG::4979" }
},
"features": [
{ "type": "Feature", "properties": { "field_1": "a", "field_2": 55.0,
"field_3": 12.0, "field_4": 42.0 }, "geometry": { "type": "Point",
"coordinates": [ 12.0, 55.0, 42.0 ] } },
{ "type": "Feature", "properties": { "field_1": "b", "field_2": 55.05,
"field_3": 12.0, "field_4": 43.0 }, "geometry": { "type": "Point",
"coordinates": [ 12.0, 55.05, 43.0 ] } },
{ "type": "Feature", "properties": { "field_1": "c", "field_2": 55.1,
"field_3": 12.0, "field_4": 44.0 }, "geometry": { "type": "Point",
"coordinates": [ 12.0, 55.1, 44.0 ] } },
{ "type": "Feature", "properties": { "field_1": "d", "field_2": 55.15,
"field_3": 12.0, "field_4": 45.0 }, "geometry": { "type": "Point",
"coordinates": [ 12.0, 55.15, 45.0 ] } },
{ "type": "Feature", "properties": { "field_1": "e", "field_2": 55.2,
"field_3": 12.0, "field_4": 46.0 }, "geometry": { "type": "Point",
"coordinates": [ 12.0, 55.2, 46.0 ] } }
]
}
===
The new file is shown in my map exactly on top of the original point layer,
meaning the horizontal projection is accurate. However, my z coordinates are
not reprojected to the new vertica
Re: [Qgis-user] Looking for application/server etc
PostGIS with Geometry Index's?! Set up Styles with Zoom Levels so as when zoomed in to 1:5000, that's the only time you have full LOD -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Dennis Burgess via QGIS-User Sent: 12 January 2023 15:43 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Looking for application/server etc Looking for something that can take a HUGE, say a 50-75 meg mutli-polygon (multi-state etc.), that has detail level down to 1meter, then parse it and display it within 1meg on top of mapping systems in a web browser ? Options? Not to mention, we have a few thousand of these so we need to be able to call the mapping for any one of them. We also need it to simplify it i.e. maybe deliver a max a 1 meg to the customer.. if they zoom out we want to make it simpler to deliver something to the customer.. I'm sure there is a way of doing this.. I'm sure there is an application, server, something that can do this automatically.. Dennis Burgess ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Colouring Geological Maps
Hi Grant, What I meant is that, using the Field calculation you can create new fields for each thing you want to style. In your case you want a field for colour. Using the field calculator you can set up a script, for example... CASE WHEN "class" = 'Igneous' THEN '#fc9403' WHEN "class" = 'Sedimentary ' THEN '#03fc56' WHEN "class" = 'Igneous rocks' THEN '#7303fc' WHEN "class" = 'Metamorphic' THEN '#fc03e7' ELSE '#fc0303' END This will then assign a colour to each feature, which you can assign using the This can be done for a lot of the styling options as I mentioned before. As I said below, and as you mentioned in your message, this won't be reflected in the Legend, only in the Map. The above probably isn't the solution you are looking for. Another suggestion is to look into creating a set of Standard Styles stored centrally. When you load a Layer into Qgis you can load these styles as required, which will apply the rules you previously set. You can also create default styles for a particular layer and every time you load the layer into a Project the style is automatically loaded with the layer. You can do this from in the Layer Properties and going down to the Style Button selecting Save as default Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: box...@iinet.net.au Sent: 12 December 2022 10:24 To: Richard McDonnell Subject: RE: [Qgis-user] Colouring Geological Maps Hi Richard, I can colourise the polygons using the color(rgb) algorithm but this does not flow back to the layers panel or the map layout legend. What do you mean "storing..as a set of attribute values"? Thanks for your assistance, Cheers Grant From: Richard McDonnell mailto:richard.mcdonn...@opw.ie>> Sent: Monday, 12 December 2022 6:18 PM To: box...@iinet.net.au<mailto:box...@iinet.net.au>; qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: RE: [Qgis-user] Colouring Geological Maps Morning, I'm not sure if this is a solution for you, but have you considered using attribution and storing your styling requirements as a set of attribute values. You can do this for Fill Colour, Stroke Thickness, Font, Sizes...etc... You could build a graphic modeller to add the attribution to your data and then have a single default style, which has all the Styling Variables set to use the new attribution. The only issue with this is that you won't generate a legend... Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Grant Boxer via QGIS-User Sent: 11 December 2022 08:48 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] Colouring Geological Maps I am trying to find an easier way of colouring a geological map. The only way I can find to colourise the polygons in both the map window and layers panel - and hence the displayed legend - is to use the rule-based rendering option. Each rule has to be manually styled. Is there a way to get QGIS to interrogate a text file for styling inform
Re: [Qgis-user] Colouring Geological Maps
Morning, I'm not sure if this is a solution for you, but have you considered using attribution and storing your styling requirements as a set of attribute values. You can do this for Fill Colour, Stroke Thickness, Font, Sizes...etc... You could build a graphic modeller to add the attribution to your data and then have a single default style, which has all the Styling Variables set to use the new attribution. The only issue with this is that you won't generate a legend... Kind Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: QGIS-User On Behalf Of Grant Boxer via QGIS-User Sent: 11 December 2022 08:48 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Colouring Geological Maps I am trying to find an easier way of colouring a geological map. The only way I can find to colourise the polygons in both the map window and layers panel - and hence the displayed legend - is to use the rule-based rendering option. Each rule has to be manually styled. Is there a way to get QGIS to interrogate a text file for styling information? I can't seem to find one anywhere in the algorithms. Aiming to use this in a graphical modeller to automate colourising geological maps. I can use a fixed qml file but that has to be done for each individual map unless you have a wide range of set styles. Cheers Grant, Perth WA ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Problem Noticed with QGIS
Andrea, Thank you for the clarification and the work around! Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— MSc GIS, FME Certified Professional —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> —— Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: Qgis-user On Behalf Of Andrea Giudiceandrea via Qgis-user Sent: 29 November 2022 16:14 To: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] Problem Noticed with QGIS Richard McDonnell richard.mcdonnell at opw.ie<mailto:qgis-user%40lists.osgeo.org?Subject=Re%3A%20%5BQgis-user%5D%20Problem%20Noticed%20with%20QGIS=%3C9708d6dac99943929281a173e54a9e6f%40opw.ie%3E> Tue Nov 29 07:17:48 PST 2022 1. If I use the option [Create temporary Layer] it produces a Singlepart Geometry as Expected, If I save the output to a File, the resultant geometry is stated as Polygon (MultiPolygon) Its the same for Linestrings also. Hi Richard, as explained (also by me) in the linked issue report [1], the line (PolyLine) and polygon (Polygon) ESRI Shapefile layer types are actually multi-part layer types which can store both multi-part geometries with only one part and multi-part geometries with more than one part. Only the point layer type has two different ESRI Shapefile layer types: the ESRI Shapefile Point type (which is a single-part type and can store only single-part geometries) and the ESRI Shapefile MultiPoint type (which is a multi-part type and can store multi-part geometries both with only one part and with more than one part). Please see the ESRI Shapefile Technical Description [2]. If you want to check that a line (PolyLine) and polygon (Polygon) ESRI Shapefile layer imported in QGIS contains features with only 1 part, you need to check the number of part for each feature, for example using the num_geometries function [3] in the field calculator. Best regards. Andrea Giudiceandrea [1] https://github.com/qgis/QGIS/issues/50720 [2] https://www.esri.com/Library/Whitepapers/Pdfs/Shapefile.pdf/ [3] https://docs.qgis.org/3.22/en/docs/user_manual/expressions/functions_list.html#num-geometries ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Problem Noticed with QGIS
Hi All, Im currently running the Following QGIS version 3.28.1-Firenze Qt version 5.15.3 Python version 3.9.5 GDAL/OGR version 3.6.0 PROJ version 9.1.0 EPSG Registry database version v10.074 (2022-08-01) GEOS version 3.11.1-CAPI-1.17.1 SQLite version 3.39.4 PDAL version 2.4.3 SpatiaLite version 5.0.1 QWT version 6.1.6 QScintilla2 version 2.13.1 OS version Windows 10 I have the following issue. As part of our Data verification Processes, we require that our data arrive as Singlepart Geometries. We run the Check Geometries Tool and it flags the data as Geometry Type Error. So I run the Multipart to Singlepart tool andwell that's where the problem is... Its two parts... 1. If I use the option [Create temporary Layer] it produces a Singlepart Geometry as Expected, If I save the output to a File, the resultant geometry is stated as Polygon (MultiPolygon) Its the same for Linestrings also. 2. When the New "corrected" layer is passed through the Check Geometries Tool, it flags it as a Geometry Type Error, even though I know its fixed, as I can validate it in an external tool. Now I did find this.. https://github.com/qgis/QGIS/issues/50720 which flags the same issues, but states that its down to the Shapefile Specification. Is there a work around for this?? Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> -- Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] large DEM not loading tiles correctly
Hi, So the underlying data might not be very efficient, for example, no internal Tiling, or compressions used. What I would suggest is… 1. Create a VRT of all the data you have. 2. Using GDAL Translate convert the VRT into a GeoTiff, with the following a. NoData Value of - b. Advanced Parameters i. NUM_THREADS = ALL_CPUS ii. BIGTIFF = YES iii. TILED = YES iv. COMPRESS = LZW c. Data Type to Float32 3. You can then also use Pyramids for your Maximum zoom levels, I recommend external, as they can be deleted if you want to change them. I hope that goes some wat to helping. Kind Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— MSc GIS, FME Certified Professional —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://https://gov.ie/opw<https://www.opw.ie> —— Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/> From: Qgis-user On Behalf Of Michael.Dodd via Qgis-user Sent: 28 September 2022 12:32 To: 'qgis-user@lists.osgeo.org' Subject: [Qgis-user] large DEM not loading tiles correctly I am trying to put together the 50m uk DEM e.g. https://www.data.gov.uk/dataset/835cf20a-8feb-4394-8b30-dcfe840ac13d/os-terrain-50-dtm but it often does not work. The data are supplied as thousands of small tiles that takes ages to unpack and put into a folder to get into qgis, however when you try to load the tiles some work and others don’t and even the ones that do work and display fine sometimes don’t merge to form large tiles and sometimes will form virtual rasters but not merged files. Basically it is a mess. I suspect others have done this successfully so any suggestions? It is particularly odd that some of the tiles will merge and others won’t and that some won’t display if you ask it to load hundreds at a time but if you just add them in a few at a time then they will load and display (in addition to the hundreds already loaded). This suggests various bugs assuming the original data are not in a whole variety of slightly different formats (should all be .asc) ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Raster
Easiest way I can think of doing what you want is to create a VRT of the three raster’s. Raster ==> Miscellaneous ==> Build Virtual Raster When you do this set the Nodata value to 0 (the default transparent value form the Georeference Tool) This should create a merged raster for you and allow you to use the correct transparency value. Hope this helps, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— MSc GIS, FME Certified Professional —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Lazanu Ciprian-Catalin via Qgis-user Sent: 24 May 2022 11:53 To: Uwe Fischer via Qgis-user ; Uwe Fischer via Qgis-user Subject: [Qgis-user] Raster Hello, I georeferenced three maps ... all good, quite easy by using points from map canvas. When my map was ready it has a black border (image 1). This is solved by ~Custom transparency options~, and a black border disappears. But this solution is just temporarily, because if I close and reopen ... that raster has again a black border. I want to merge the three maps in one, but it does with a black border between maps. A solution to this annoying problem? Thank you https://drive.google.com/drive/folders/1qM1_TeFUng9-xyRXRQCuMrEMwxFeJV7n?usp=sharing images Meet Google Drive – One place for all your files<https://drive.google.com/drive/folders/1qM1_TeFUng9-xyRXRQCuMrEMwxFeJV7n?usp=sharing> Google Drive is a free way to keep your files backed up and easy to reach from any phone, tablet, or computer. Start with 15GB of Google storage – free. drive.google.com ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Problem merging 30-m SRTM tiles in QGIS 3.24.3 for MacOS 10.14.6
Hi Walter, As an alternative to Wouter’s suggestion, I would recommend VRT’s (Raster ==> Miscellaneous ==> Build Virtual Raster) Not alone does it merge/mosaic but it also results in a small file size. It is also very easy to generate convert that VRT to any other format output, using gdal_translate (Raster ==> Conversion ==> Translate) I hope this helps, Kind Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— MSc GIS, FME Certified Professional —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Wouter Impens via Qgis-user Sent: 20 May 2022 11:04 To: qgis-user Subject: Re: [Qgis-user] Problem merging 30-m SRTM tiles in QGIS 3.24.3 for MacOS 10.14.6 Hi Walter, I'm having good results using the 'r.patch' tool from GRASS for merging rasters. Hope this helps Greetings Wouter Op do 19 mei 2022 om 23:31 schreef Walter Alvarez via Qgis-user mailto:qgis-user@lists.osgeo.org>>: I’m trying to merge either two or twelve 30-m SRTM tiles using QGIS 3.14.3. In either case (2 or 12) I am stopped by the following problem: Using Raster > Miscellaneous > Merge… I get the “Merge" window. I try to use Input layers > Elements selected > “…" That takes me to the "Multiple Selection" window, showing the 2 or 12 files I want to merge (filenames: nXXeXXX_1arc_v3 [EPSG:4326]). After selecting all the files, when I click “OK” the "Multiple Selection Window” and the “Merge” window both disappear, and I cannot figure out what to do next, or do differently. I can’t figure out how to get past this problem and merge my tiles. Thanks for any help you can offer! Walter __ Walter Alvarez Professor of the Graduate School Department of Earth and Planetary Science University of California Berkeley ___ Qgis-user mailing list Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Displaying county attribute names in the layers column
Hi Mike, Right click on the Layer, select Properties and go to Symbology. From there you should see, at the top, a drop down menu set to Single Symbol. You should change this to Categorize. Then under Value, set this to the Counties name field. Then click on Classify. I hope that helps. Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Richard McDonnell Sent: 02 March 2022 07:41 To: 'Mike Breiding - Morgantown WV' Subject: RE: [Qgis-user] Displaying county attribute names in the layers column Hi Mike, Right click on the Layer, select Properties and go to Symbology. From there you should see, at the top, a drop down menu set to Single Symbol. You should change this to Categorize. Then under Value, set this to the Counties name field. Then click on Classify. I hope that helps. Regards, Richard. From: Mike Breiding - Morgantown WV mailto:epicroadtr...@gmail.com>> Sent: 01 March 2022 18:22 To: Richard McDonnell mailto:richard.mcdonn...@opw.ie>> Subject: Re: [Qgis-user] Displaying county attribute names in the layers column On 3/1/2022 10:46 AM, Richard McDonnell wrote: Hi, In your Styling, set it to Categorized and select the field which has your County Names. Click Classify and you should get the full list of Counties. You can then modify your style to match your requirements. Regard’s, Richard. Hi Richard, I am using Hannover 3.16 When I highlight the layer and right click there is no "Styling" option available. There is a "Styles" option which is opens a color wheel of sorts. If I choose "Properties" I see nothing called "Styling" listed. I am not sure what to look for next. Thanks, WV-Mike p.s. You email went only to me, not the list so that is how I am replying. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user <mailto:qgis-user-boun...@lists.osgeo.org> On Behalf Of Mike Breiding - Morgantown WV Sent: 01 March 2022 17:21 To: QGIS User List <mailto:Qgis-user@lists.osgeo.org> Subject: [Qgis-user] Displaying county attribute names in the layers column Greetings, I have a state county outline layer in a project and wish to be able to see a list of the county names in the Layers column. I looked through the options for the Layers Properties and also went through the menus but I saw nothing obvious. How might I accomplish this? Thanks, WV-Mike -- Mike Breiding www.EpicRoadTrips.us<http://www.EpicRoadTrips.us> -- Mike Breiding www.EpicRoadTrips.us<http://www.EpicRoadTrips.us> ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Displaying county attribute names in the layers column
Hi, In your Styling, set it to Categorized and select the field which has your County Names. Click Classify and you should get the full list of Counties. You can then modify your style to match your requirements. Regard’s, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Mike Breiding - Morgantown WV Sent: 01 March 2022 17:21 To: QGIS User List Subject: [Qgis-user] Displaying county attribute names in the layers column Greetings, I have a state county outline layer in a project and wish to be able to see a list of the county names in the Layers column. I looked through the options for the Layers Properties and also went through the menus but I saw nothing obvious. How might I accomplish this? Thanks, WV-Mike -- Mike Breiding www.EpicRoadTrips.us<http://www.EpicRoadTrips.us> ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Update Null Geometry
Hi Hugh, Are you working with a CSV file? Or is it a shapefile?? Im not sure if this will work, but create a new point for a null geomety, you can then, using the Attribute table (in edit mode), Merge Features, by selecting the new geometry and the table row without geometry, then selecting Merge Features[cid:image001.png@01D80E18.C81AC070] The popup will then allow you to merge the two, you can select the row without geometry and select “Take attributes from selected feature” this should merge your new geometry with the attribute. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Hugh Kelley Sent: 20 January 2022 16:01 To: qgis-user Subject: [Qgis-user] Update Null Geometry Hi all, I have a points dataset with a few null geometries in it. Is there a tool that can update these in place? It seems that the point editing tool must add a new row instead of updating an existing row. The vertex editing tool seems unable to update a null geom since there's nothing to initially click on. Maybe I'm missing a tool or way of using the vertex editing tool? A less preferred workflow would be to create a separate file and manually add the points with the primary key as an attribute to later update on in postgres but it would be much cleaner to edit the table in place I think and I am curious if there is a solution since I'm not thinking anything up myself. Thanks for any suggestions. -- Hugh Kelley ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] NoData in RGB Imagery
Hi Johannes, Thanks for getting back to me. In general we would use the same value for each band, so 256 or -. We only work, where possible with GeoTIFF, so the Internal Mask idea is a nice one I hadn’t thought of. Also the use of an ALPHA channel, might be an option. I could be wrong, but in relation to the internal masking, I believe it can be difficult for some CAD and GI Software to recognise internal masking, I believe there’s even an issue with GeoServer, which we use extensively here. As you say an Alpha Band is also an option…I will need to experiment a little more! Once again, thank you for your response! Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Johannes Kröger (WhereGroup) Sent: 14 January 2022 09:39 To: Richard McDonnell ; Qgis Users List Subject: Re: [Qgis-user] NoData in RGB Imagery Hey Richard, do you have different NODATA pixels between the three bands (R, G, B) or is it the same? If there are no differences then you can use an additional channel as mask. I would suggest you store your imagery in GeoTIFF with an "internal mask". Even posted a nice example of this in https://lists.osgeo.org/pipermail/gdal-dev/2014-August/039907.html If your format supports RGBA (e.g. PNG), then that would be another way to achieve this but a nice GeoTIFF should be the best solution. Cheers, Hannes Am 13.01.22 um 18:35 schrieb Richard McDonnell: Hi all, I have a general GIS query and am hoping I can get some insight from the community. It relates to how we deal with pixels with no data in RGB Imagery. It seems to be typical to produce RGB imagery as 8bit with pixel values between 0 and 255, with either 0 or 255 being used as the NoDATA value. To me this is problematic, as there can be valid pixels within your image with 0 or 255. To me the solution is to use 16bit Imagery and to assign the NoDATA value to any value outside of the 0 – 255 range. I know in DEM’s its usual to use - as your NoDATA value but my question is, Is there a standardised way to deal with NoDATA in RGB? I welcome any comments and suggestions. Regards & Thanks in advance, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user -- Johannes Kröger / GIS-Entwickler/-Berater WhereGroup GmbH Grevenweg 89 20537 Hamburg Germany Tel: +49 (0)228 / 90 90 38 - 36 Fax: +49 (0)228 / 90 90 38 - 11 johannes.kroe...@wheregroup.com<mailto:johannes.kroe...@wheregroup.com> www.wheregroup.com<http://www.wheregroup.com> Geschäftsführer: Olaf Knopp, Peter Stamm Amtsgericht Bonn, HRB 9885 --- - Schon gewusst? In unserem Blog geben wir Tipps & Tricks zu Open-Source-GIS-Software und berichten aus unserem Experten-Alltag: https://wheregroup.com/blog/ - ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] NoData in RGB Imagery
Hi all, I have a general GIS query and am hoping I can get some insight from the community. It relates to how we deal with pixels with no data in RGB Imagery. It seems to be typical to produce RGB imagery as 8bit with pixel values between 0 and 255, with either 0 or 255 being used as the NoDATA value. To me this is problematic, as there can be valid pixels within your image with 0 or 255. To me the solution is to use 16bit Imagery and to assign the NoDATA value to any value outside of the 0 - 255 range. I know in DEM's its usual to use - as your NoDATA value but my question is, Is there a standardised way to deal with NoDATA in RGB? I welcome any comments and suggestions. Regards & Thanks in advance, Richard. -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS Model Designer
Apologies, I meant I have very little experience working with Python…something I am constantly saying I need to remedy! Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Nicolas Cadieux Sent: 12 January 2022 16:31 To: Richard McDonnell ; Qgis Users List Subject: Re: [Qgis-user] QGIS Model Designer HI, Python is installed with QGIS. The easiest way is to go to plugins -> Python console. Nicolas On 2022-01-12 5:37 a.m., Richard McDonnell wrote: Hi, Thanks for getting back. I am afraid I have no Python, but I will give it a go!! Regards & Thanks Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Ujaval Gandhi <mailto:uja...@spatialthoughts.com> Sent: 11 January 2022 14:22 To: Richard McDonnell <mailto:richard.mcdonn...@opw.ie> Cc: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: Re: [Qgis-user] QGIS Model Designer The batch processing and modeler are mising the 'iterate' feature, and this type of batch processing + merge functionality will be useful. I have a tutorial on how to write a bit of pyqgis code to do this that shows exactly the use case you have. But it can be used with any other processing algorithm. https://www.qgistutorials.com/en/docs/3/processing_algorithms_pyqgis.html [Image removed by sender. Logo]<https://spatialthoughts.com/> Ujaval Gandhi Spatial Thoughts mobile: +91-8095684687 email: uja...@spatialthoughts.com<mailto:uja...@spatialthoughts.com> [Imageremoved by sender. LinkedIn icon]<https://www.linkedin.com/in/spatialthoughts/> [Image removed by sender. Twitter icon] <https://twitter.com/spatialthoughts> On Mon, Jan 10, 2022 at 4:52 PM Richard McDonnell mailto:richard.mcdonn...@opw.ie>> wrote: Hi All, Apologies, but I think I have found a Plugin, which looks promising “Point sampling tool” which seems to do what I want. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Richard McDonnell Sent: 10 January 2022 11:18 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] QGIS Model Designer Hi all. I have been asked to sample over 100 raster pixel values using a single point file. I can use the “Sample raster values” Tool, but this only outputs for one Raster. I have looked at batching this, but it will produce 100’s of point files which I will have to merge together. So I was looking at using the Model Designer, but again it can’t accept multiple raster inputs. What I would like to know, is how I might easily create a single shapefile with a column for each raster containing the sampled value. The easiest way would be to somehow sample the first raster saving the output then loop back to the second raster, but this time using output from the first sampling to sample the second. This looping would continue until all raster’s had been sampled. Any help appreciated. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Publi
Re: [Qgis-user] dwg files cant be synchronized
Hi, As long as you have some kind of background Mapping You could try the following Plugins · Vector Blender https://github.com/olivierdalang/VectorBender · Vector Correction https://north-road.github.io/vector_correction/ Regard’s, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Boaz Bar Ilan Sent: 12 January 2022 10:00 To: qgis-user Subject: [Qgis-user] dwg files cant be synchronized i from time to time i get dwg files that it impossible to put them in the right csr . is there something to help ? boaz ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS Model Designer
Hi, Thanks for getting back. I am afraid I have no Python, but I will give it a go!! Regards & Thanks Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Ujaval Gandhi Sent: 11 January 2022 14:22 To: Richard McDonnell Cc: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] QGIS Model Designer The batch processing and modeler are mising the 'iterate' feature, and this type of batch processing + merge functionality will be useful. I have a tutorial on how to write a bit of pyqgis code to do this that shows exactly the use case you have. But it can be used with any other processing algorithm. https://www.qgistutorials.com/en/docs/3/processing_algorithms_pyqgis.html [Image removed by sender. Logo]<https://spatialthoughts.com/> Ujaval Gandhi Spatial Thoughts mobile: +91-8095684687 email: uja...@spatialthoughts.com<mailto:uja...@spatialthoughts.com> [Image removed by sender. LinkedIn icon]<https://www.linkedin.com/in/spatialthoughts/> [Image removed by sender. Twitter icon] <https://twitter.com/spatialthoughts> On Mon, Jan 10, 2022 at 4:52 PM Richard McDonnell mailto:richard.mcdonn...@opw.ie>> wrote: Hi All, Apologies, but I think I have found a Plugin, which looks promising “Point sampling tool” which seems to do what I want. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Richard McDonnell Sent: 10 January 2022 11:18 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] QGIS Model Designer Hi all. I have been asked to sample over 100 raster pixel values using a single point file. I can use the “Sample raster values” Tool, but this only outputs for one Raster. I have looked at batching this, but it will produce 100’s of point files which I will have to merge together. So I was looking at using the Model Designer, but again it can’t accept multiple raster inputs. What I would like to know, is how I might easily create a single shapefile with a column for each raster containing the sampled value. The easiest way would be to somehow sample the first raster saving the output then loop back to the second raster, but this time using output from the first sampling to sample the second. This looping would continue until all raster’s had been sampled. Any help appreciated. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS Model Designer
Hi All, Apologies, but I think I have found a Plugin, which looks promising "Point sampling tool" which seems to do what I want. Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Richard McDonnell Sent: 10 January 2022 11:18 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] QGIS Model Designer Hi all. I have been asked to sample over 100 raster pixel values using a single point file. I can use the "Sample raster values" Tool, but this only outputs for one Raster. I have looked at batching this, but it will produce 100's of point files which I will have to merge together. So I was looking at using the Model Designer, but again it can't accept multiple raster inputs. What I would like to know, is how I might easily create a single shapefile with a column for each raster containing the sampled value. The easiest way would be to somehow sample the first raster saving the output then loop back to the second raster, but this time using output from the first sampling to sample the second. This looping would continue until all raster's had been sampled. Any help appreciated. Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] QGIS Model Designer
Hi all. I have been asked to sample over 100 raster pixel values using a single point file. I can use the "Sample raster values" Tool, but this only outputs for one Raster. I have looked at batching this, but it will produce 100's of point files which I will have to merge together. So I was looking at using the Model Designer, but again it can't accept multiple raster inputs. What I would like to know, is how I might easily create a single shapefile with a column for each raster containing the sampled value. The easiest way would be to somehow sample the first raster saving the output then loop back to the second raster, but this time using output from the first sampling to sample the second. This looping would continue until all raster's had been sampled. Any help appreciated. Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] automate connection to a PostGIS db for QGIS
Hi, I’m unaware of a script, but you could just create a Default Project. These can be stored at a central location, everyone can access or place on their desktop, which will load all the Layers they require. If it’s any help, all the connection details are stored under the QGIS user Profiles. On Windows these can be found here C:\Users\username\AppData\Roaming\QGIS\QGIS3\profiles, maybe someone here could point out how you might be able to create a single file which can be placed within each users default Profile. I think though messing with peoples profiles could be problematic, which is why I’d suggest the Default Project as above Sorry I can’t be of any more help. Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of tim dunlevie Sent: 07 January 2022 00:52 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] automate connection to a PostGIS db for QGIS Hi guys, About to host a PostGIS db on our server, and want users to connect to the db in QGIS. Is there a way I can push out a script (?) to all user's machines that sets the connection to the postgis db for QGIS? Rather than manually entering authentication on each machine? I have one generic role for users as they will be read-only users. thanks, Tim ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] is there a way to clip a shapefile without changing it from point to multipoints?
Hi Katrin, You could try just selecting the points of interest and then try Right Click on Layer · Export · Save Selected Features As o Under Geometry select Point o Under SHPT select POINT I have not tried it, but that should work. Regard's, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Katrin Schneider Sent: 07 December 2021 15:03 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] is there a way to clip a shapefile without changing it from point to multipoints? Hi, (QGIS 3.20.3) is there a way to clip a shapefile without changing it from point to multipoints? Work-Process: 1. I had to clip my layer A(points) with shapefile B (polygon). The resulting layer C is multipoint despite consisting only of points. 2. I tried several methods to edit the layer C a) Export it as point-shapefile -> error b) Multipoint to point -> umlauts/mutated vowels are not readable anymore Kind regards, Katrin Katrin Schneider FG Naturschutz & Umweltkommunikation / Fachgebietsleiterin Unabhängiges Institut für Umweltfragen - UfU - Büro Halle korina | Koordinationsstelle Invasive Neophyten in Schutzgebieten Sachsen-Anhalts beim UfU e.V. Große Klausstr. 11, 06108 Halle/Saale Telefon 0345 202 65 30, Fax 0345 685 85 216 www.korina.info<http://www.korina.info/>, www.neophyten-in-der-landwirtschaft.de<http://www.neophyten-in-der-landwirtschaft.de/> KORINA-Newsletter<https://www.korina.info/info/korina/newsletter/> [cid:image001.png@01D7EB7F.17C3C980]<https://www.ufu.de/> [cid:image002.jpg@01D7EB7F.17C3C980] <https://twitter.com/UfUberlin> [cid:image003.jpg@01D7EB7F.17C3C980] <https://www.facebook.com/ufu.institut> Das UfU braucht Unterstützung! Jetzt Spenden<https://www.ufu.de/ufu-mitglieder-2/> oder Mitglied<https://www.ufu.de/ufu-mitglieder/> werden und ein Teil der UfU Familie sein! Hier finden Sie unsere neusten Publikationen<https://www.ufu.de/publikationen/>. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Modifica vertici
Ciao, Mi scuso, utilizzo Google Translate!! Non sono sicuro di aver compreso appieno la tua domanda, ma... Prima rendi il livello modificabile e poi usando lo strumento vertice [cid:image001.png@01D7E050.FDF2C3F0] Fai clic sul vertice che desideri modificare e spostare, quindi puoi selezionare la nuova posizione per il nodo/vertice (vedi immagine sotto). [cid:image002.png@01D7E050.FDF2C3F0] Altro può essere visto al link sottostante. https://docs.qgis.org/3.22/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html#basic-operations Saluti, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of MARGHERITA Bufalini Sent: 23 November 2021 08:04 To: qgis-user@lists.osgeo.org; qgis-user-requ...@lists.osgeo.org Subject: [Qgis-user] Modifica vertici Buongiorno, è possibile in qgis 3.16.11 cambiare lo start/end point vertex di uno shape file? Grazie [Image removed by sender.] ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Batch Aerial Imagery GeoReferencing
Hi Kirk and Charles, Thanks for your reply. This is what we know… CAMERA:Wild RC8 and RC10 152mm Focal Length. ALTITUDE: 4,560m with Block Adjustments for Mountainous areas IMAGE OVERLAP: 60% along track 25% side lap and all flight line Orientations East – West except for offshore. Im afraid though that GPS just wasn’t a thing when these images where captured. We have been looking at reverse geotagging the Images, that is we know there location…ish and we can convert them to jpegs with EXIF values assigned in theory. Though the biggest issue is, in talking on the guys on the Open Drone Mapper forum, our overlaps aren’t sufficient for SFM, so an automated process will be out of the question. Once again, thanks for getting back, if you can think of anything else, please let me know. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Kirk Schmidt Sent: 01 November 2021 12:59 To: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] Batch Aerial Imagery GeoReferencing Hi Richard: You would require a couple of things: 1) Camera interior orientation which would include the lens calibration 2) exterior orientation which would include precise coordinate at time of exposure as well as the pitch, roll and yaw of the camera. 3) the offsets from the camera film or sensor center to the center of the aircraft gps antenna. 4) an accurate DEM or your target area If you have the above data, you can autoreference your images. If the images have a high endlap and sidelap, you could use commercial software such as Pix4D or Global Mapper to orthorectify the images based on structure from motion. Check into drone orthorectification software. Kirk On 10/29/2021 9:13 AM, Richard McDonnell wrote: Afternoon all, I have access to over 6000 Aerial Images covering Ireland, we also have scans of the Flight Paths and Image Orientation and Extents (Scans from Paper Maps) What I was wondering is if there is a way to Batch Georeference all of these Images? Any Ideas, help, guidance welcome. I have thought about maybe even reverse engineering the Flight Plan, then using OpenDroneMap to georeference the Images. Regards & Thanks, Richard McDonnell —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user -- Kirk Schmidt, MScF, BScF, RPF General Manager Nortek Resource Solutions Inc. 26 Church Road Sutherlands River, NS B0K 1W0 Tel (902) 922.3607 Email: k...@nortekresources.com<mailto:k...@nortekresources.com> Web: www.nortekresources.com<http://www.nortekresources.com> ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Batch Aerial Imagery GeoReferencing
Afternoon all, I have access to over 6000 Aerial Images covering Ireland, we also have scans of the Flight Paths and Image Orientation and Extents (Scans from Paper Maps) What I was wondering is if there is a way to Batch Georeference all of these Images? Any Ideas, help, guidance welcome. I have thought about maybe even reverse engineering the Flight Plan, then using OpenDroneMap to georeference the Images. Regards & Thanks, Richard McDonnell -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Incredibly slow attribute view/access from postgresv3.16
Andrew, Maybe what you need to do is Filter the data before editing, removing all but the data you are looking to edit. Another thing you can try in the Attribute Table is Show Features Visible On Map, I have not tried it but, you can set this as the default behaviour by going to Settings, Options, Data Sources and under Feature Attributes and Tables set the Attribute table behaviour to Show Features Visible on Map. I hope some of the above helps. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Andrew Hughes Sent: 06 October 2021 08:22 To: Bernhard Ströbl Cc: QGIS User Subject: Re: [Qgis-user] Incredibly slow attribute view/access from postgresv3.16 Thanks Bernhard, I'm afraid we are quite well indexed. I'd also expect slow performance on the map rendering if that were the problem. Unless of course there is some client side data caching from postgres that I am not aware of? Thank you & Cheers, Andrew On Wed, 6 Oct 2021 at 16:26, Bernhard Ströbl mailto:bernhard.stro...@jena.de>> wrote: Hi, just a few ideas: Do you have a spatial index on the table? I have no clue how QGIS handles the attribute table (loading all datasets in the first place and then select or else) maybe editing this many features is better done directly on the DB? Bernhard Am 05.10.2021 um 23:51 schrieb Andrew Hughes: > Hi All, > > Just to get this out the way... *I don't believe this is a problem with > the primary key or its index. * > > I have a postgis datasource with approx 3 million features (road > segments). Yep, lot-a-data. > > The rendering performance is ok & visible @ 1:50,000+ . Takes a few > seconds but hey, it's a lot of data and certainly not disappointing. > > However, severe performance problems are seen whenever I am trying to > work with anything related to attribution, such as "Open Attribute > Table" or "modify the selected features or all attributes > simultaneously". We're talking around 10 minutes of "/Not Responding/". > > Note: I have altered the QGIS "/Settings -> Options -> Data Sources -> > Feature Attributes and Tables/"so that "/Show selected features/" is > now the default attribute table behaviour. So _hopefully_, this doesn't > attempt to load all 3million features. > > Can anyone offer any guidance as to what I might be able to do to track > down this issue (or just fix it)? For reference, we are trying to put > together a simple editor that will allow a user to browse, select (road > segment) features, and edit a single text attribute value on all > selected features only. Fairly simple, but the UI elements we need > appear to be in a world of pain. > > Thanks in advance, > Andrew > > > > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > > > > __ Information from ESET Mail Security, version of virus signature > database 24076 (20211005) __ > > The message was checked by ESET Mail Security. > http://www.eset.com > __ Information from ESET Mail Security, version of virus signature database 24078 (20211006) __ The message was checked by ESET Mail Security. http://www.eset.com ___ Qgis-user mailing list Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Store .qlr file into postgresql/postgis?
Hi, When you save a style to postgres/PostGIS you save the QML and the SLD format styles. When you save it as a default style for the layer, Style => Save as Default => Datasource Database, it automatically has that link to the data source. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of celati Laurent Sent: 30 September 2021 10:50 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Store .qlr file into postgresql/postgis? Good morning, As far as i know, it is possible to store in postgresql / postgis qgis style files (QML format), qgis project files (QGS format). Is it possible to store .QLR format files (XML file which contains a pointer to the data source in addition to the style information). Do other users share an interest in being able to do this? Thanks. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Export attribute table in PDF format
Hi, The best solution is to use the Print Composer sep up your sheet as you require and then insert thee attribute table using Add Attribute Table Hope this helps!! Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of MARGHERITA Bufalini Sent: 29 September 2021 11:15 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Export attribute table in PDF format Hi, I would like to know if it is possible in the new version of Qgis (3.16.11) to export the attribute table of a shapefile not only in CSV format but also in PDF format. Thanks -- Dott. Margherita Bufalini PhD School of Science and Technology, Geology Division University of Camerino Via Gentile III da Varano, Camerino 62032, Italy email: margherita.bufal...@unicam.it<mailto:margherita.bufal...@unicam.it> [Image removed by sender.]<https://www.avast.com/sig-email?utm_medium=email_source=link_campaign=sig-email_content=webmail_term=icon> Virus-free. www.avast.com<https://www.avast.com/sig-email?utm_medium=email_source=link_campaign=sig-email_content=webmail_term=link> [Image removed by sender.] ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to replicate ARC-GIS Natural Neighbour Interpolation Algorithm in QGIS / DTM from elevation points
Hi, In addition to what Jurijsy suggested you can also use gdaldem. You can access this in QGIS by selecting Raster from the toolbar and the selecting Analysis and Grid Nearest Neighbour. If using Windows and an OSGeo4W install, you can utilise the OSGeo4W Shell to run the same command via command line. Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Micha Silver Sent: 08 September 2021 14:04 To: Jurijs Kondratenko ; qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] How to replicate ARC-GIS Natural Neighbour Interpolation Algorithm in QGIS / DTM from elevation points If your'e willing to try GRASS GIS, then the module v.surf.nnbathy should help. https://grass.osgeo.org/grass78/manuals/addons/v.surf.nnbathy.html On 9/8/21 11:08 AM, Jurijs Kondratenko wrote: Hi, I'm building a DTM from random points (with different distances in between) and I like ArcGIS Natural Neighbour algorithm for doing so. Is there any way to replicate it in QGIS? https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/how-natural-neighbor-works.htm Alternatively, what would be a way to constructing DTM from points, preserving the original points in respective pixels? Thank you! Jurijs Kondratenko Riga Technical University ___ Qgis-user mailing list Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user -- Micha Silver Ben Gurion Univ. Sde Boker, Remote Sensing Lab cell: +972-523-665918 ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Exporting QGIS map to KML/KMZ
Hi, You can do this, but it requires a few steps. Open up the Project where the Layers are and they are all styled as you want STEP1 Convert all to KMZ 1. In the Processing Tools under GDAL, Vector Conversion highlight Convert format right click and select Execute as Batch Process 2. Click the + symbol to add additional rows and select the Layers you want to convert 3. Click on the three dots on the right for the first layer, set the Save as type to KML set a location and in the file name we are just going to give it a prefix, type something like 01_ then click save 4. You will then be presented with the AutoFill option, set the Autofill mode to Fill with parameter values and set the Parameter to use to Input Layer, at this stage you can delete the prefix manually if you wish 5. Click Run This should have saved out all Shapefiles as KML’s for you. Now for the Styling and fixing of styles STEP2 Apply Styles to KML 1. Right click on one of the original Layers in your project, select Styles, Copy Style, All Style Categories 2. Right click on the corresponding KML select Styles, Paste Style, All Style Categories Repeat for all other Layers STEP3 Final Step 1. In the Search baron the Processing Toolbox search for Package Layers 2. Select the KML Files as your Input Layers 3. Make sure the Save layer Styles into GeoPackage 4. Click on the three dots at Destination GeoPackage, selecting Save to File, set the Location and Name of the GeoPackage, click Save and then click Run The result will be a GeoPackage file with the KML’s saved and the Styles applied, which means that anyone who opens the GeoPackage in another QGIS Project will always have the Styles applied. I don’t believe there is an automated process that will do this for you, but you could also look at the model builder and using the steps above as a guide, build a custom process which will do the three steps I have outlined above in a single step for you. Hope that helps, Richard McDonnell —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of krishna Ayyala Sent: 13 August 2021 14:06 To: qgis-user Subject: [Qgis-user] Exporting QGIS map to KML/KMZ Hello, I am reposting this question. I have a QGIS map saved with ".qgz" extension. This map has four layers. One layer has points, one layer has lines and two layers have polygons. Is it possible to convert the entire map to kmz without losing the symbology. I know how to convert each layer into kmz. But, I am exploring to see if I can convert the entire map to kmz? Regards. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How can I export Vector & Raster layers together to import into mapshaper
Have a look at this video, it seems to allow you to utilise MapBox as a background Map https://www.youtube.com/watch?v=N33d7fCVsZw Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Kris Lagocki Sent: 12 August 2021 14:40 To: Richard McDonnell Cc: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] How can I export Vector & Raster layers together to import into mapshaper My issue seems to be with the raster layer, can't seem to figure out how to have it export together with the vector layer. On Thu, Aug 12, 2021 at 5:27 AM Richard McDonnell mailto:richard.mcdonn...@opw.ie>> wrote: Hi, There is a TopoJSON Writer Plugin available for QGIS, you might give that a try. It should write the vector dataset out as TopoKSON for you. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Kris Lagocki Sent: 11 August 2021 14:32 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] How can I export Vector & Raster layers together to import into mapshaper Hi - I created a shape file using QGIS with a US Postal Code shape file that I found on the Census website and joined it with a data file listing the Postal Codes and which Sales Territory they belong to. I added in a raster layer OpenStreetMap. I'd like to export both layers together and import them into mapshaper so that I can export as Topojson. It has to be in this format to use within Power BI. Has anyone accomplished this? Any help is appreciated. Thanks. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How can I export Vector & Raster layers together to import into mapshaper
Hi, There is a TopoJSON Writer Plugin available for QGIS, you might give that a try. It should write the vector dataset out as TopoKSON for you. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Kris Lagocki Sent: 11 August 2021 14:32 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] How can I export Vector & Raster layers together to import into mapshaper Hi - I created a shape file using QGIS with a US Postal Code shape file that I found on the Census website and joined it with a data file listing the Postal Codes and which Sales Territory they belong to. I added in a raster layer OpenStreetMap. I'd like to export both layers together and import them into mapshaper so that I can export as Topojson. It has to be in this format to use within Power BI. Has anyone accomplished this? Any help is appreciated. Thanks. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Problem using Model Inputs variable in an Select by expression in the model Designer
Nicolas, I have not looked at this in too much detail, but at a quick glance, could it not be the fact that you should be using the newly created fields? As in instead of @NamelengthField != @NamelengthField || '2', should it not be more like your previous example Length != Length2 Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Nicolas Cadieux Sent: 20 July 2021 09:27 To: Qgis Users List Subject: Re: [Qgis-user] Problem using Model Inputs variable in an Select by expression in the model Designer Hi, Does anyone have an idea? Nicolas Cadieux https://gitlab.com/njacadieux Le 8 juill. 2021 à 01:17, Nicolas Cadieux mailto:njacadieux.git...@gmail.com>> a écrit : Hi, I am creating a model that fixes Network files before they are used in the QGIS Network analysis (Shortest path) tools. This is my work flow: 1. Create a "Length" field (value) and calculate $length in the field calculator 2. Split the Multipart lines into Singlepart lines 3. Create a "Length2" field (value) and calculate $length in the field calculator 4. Select by expression Length != Length2. This basically gives me a selection of line that have been modified by the Multipart to Singlepart algorithm. (I get 8 results) This works well The problem is when I create and Input String to let the user create a "Length" field. This become a variable called @NamelengthField. My work flow become: 1. User input "Length" in the Model input. (@NamelengthField) 2. Create a "Length" field using @NamelengthField (as pre-calculated value) and calculate $length in the field calculator: This is OK 3. Split the Multipart lines into Singlepart lines: This is OK 4. Create a "Length2" field using @NamelengthField ||'2' (as pre-calculated value) and calculate $length in the field calculator: This is OK this field (Length2) is created and calculated properly. 5. I get stuck when I try Select by expression using @NamelengthField != @NamelengthField || '2' (as pre-calculated value) (I get all lines back) and the test does not work. I tried stuff like @NamelengthField != (@NamelengthField || '2') '@NamelengthField != @NamelengthField || '2'' "@NamelengthField != @NamelengthField || '2'" "@NamelengthField"|| !=|| "@NamelengthField || '2'" Even simple @NamelengthField = 5.286365157529550 (which should extract exactly one value). Any ideas? Nicolas QGIS 3.18.2 on Windows 10 -- Nicolas Cadieux https://gitlab.com/njacadieux ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to filter shape or oracle layer
I work a lot with National datasets, some with millions of geometries With these geometries we use PostgreSQL with PostGIS. Make sure the Geometries are indexed and it works very well. You mention Oracle, you should be able to index your geometries, should speed everything up on the database side. Have a look here.. https://docs.oracle.com/database/121/SPATL/creating-spatial-index.htm You may have already done this. Apologies, I can’t be of more help. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Dario Sent: 10 June 2021 13:25 To: Richard McDonnell Cc: QGIS User List Subject: Re: [Qgis-user] How to filter shape or oracle layer Hi, In this casa I don’t want to use “select by location” or “extract by location”, because I’d like to use the original layer without exporting a new static shapefile. I don’t know what geometry Generator is and I’m going to check if it is suitable with my needs. My wish is to reduce rendering time because I’m using a big data (all the city), but actually I’m working only in a district. All the time I move, reload or pan I need to wait a lot. I don’t know what is the right procedure because I’m a super beginner. Sorry :) _ Il giorno 10 giu 2021, alle ore 13:57, Richard McDonnell mailto:richard.mcdonn...@opw.ie>> ha scritto: Dario, To run a spatial query you need to use Select by Location or extract by location. This assumes that you have two different layers. I don’t believe it will do this for a single layer with the above. Are you trying to use the geometry Generator? Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Dario mailto:dario9...@gmail.com>> Sent: 10 June 2021 12:41 To: Richard McDonnell mailto:richard.mcdonn...@opw.ie>> Cc: QGIS User List mailto:qgis-user@lists.osgeo.org>> Subject: Re: [Qgis-user] How to filter shape or oracle layer Hi Richard, The issue is that I tried to write down: intersects( $geometry, geometry( get_feature( layer, attributeField, value ) )) But nothing happens :( _ Il giorno 10 giu 2021, alle ore 12:21, Richard McDonnell mailto:richard.mcdonn...@opw.ie>> ha scritto: Hi Dario, If you right click on any Vector Layer and select Filter you can filter as you wish. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Dario C Sent: 09 June 2021 12:33 To: QGIS User List mailto:qgis-user@lists.osgeo.org>> Subject: [Qgis-user] How to filter shape or oracle layer Hi, is there any way to filter a layer (both shape and oracle) using a spatial query? (I would like to load/view only what it is inside a range of value of a proper "field") Thanks Please note that the existing 01-6476XXX / 046-9426XXX numbering ranges will no longer be available after 30th April 2021. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to filter shape or oracle layer
Dario, To run a spatial query you need to use Select by Location or extract by location. This assumes that you have two different layers. I don’t believe it will do this for a single layer with the above. Are you trying to use the geometry Generator? Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Dario Sent: 10 June 2021 12:41 To: Richard McDonnell Cc: QGIS User List Subject: Re: [Qgis-user] How to filter shape or oracle layer Hi Richard, The issue is that I tried to write down: intersects( $geometry, geometry( get_feature( layer, attributeField, value ) )) But nothing happens :( _ Il giorno 10 giu 2021, alle ore 12:21, Richard McDonnell mailto:richard.mcdonn...@opw.ie>> ha scritto: Hi Dario, If you right click on any Vector Layer and select Filter you can filter as you wish. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Dario C Sent: 09 June 2021 12:33 To: QGIS User List mailto:qgis-user@lists.osgeo.org>> Subject: [Qgis-user] How to filter shape or oracle layer Hi, is there any way to filter a layer (both shape and oracle) using a spatial query? (I would like to load/view only what it is inside a range of value of a proper "field") Thanks Please note that the existing 01-6476XXX / 046-9426XXX numbering ranges will no longer be available after 30th April 2021. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to filter shape or oracle layer
Hi Dario, If you right click on any Vector Layer and select Filter you can filter as you wish. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Dario C Sent: 09 June 2021 12:33 To: QGIS User List Subject: [Qgis-user] How to filter shape or oracle layer Hi, is there any way to filter a layer (both shape and oracle) using a spatial query? (I would like to load/view only what it is inside a range of value of a proper "field") Thanks Please note that the existing 01-6476XXX / 046-9426XXX numbering ranges will no longer be available after 30th April 2021. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Is this a bug in the vector clipping algorithm?
Hi, Just a quick one, you could try the Topology Checker https://docs.qgis.org/2.8/en/docs/user_manual/plugins/plugins_topology_checker.html This should help you locate things like Self Intersections. You will have to manually fix the error, but at least you have a way to find the issues. Regard’s, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— MSc GIS, FME Certified Professional —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Alister Hood Sent: 01 June 2021 23:06 To: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] Is this a bug in the vector clipping algorithm? OK, I thought I had tried "Check validity" with both QGIS and GEOS methods, but I must have got confused and only used GEOS method, which doesn't detect an error. The first tool I tried was actually "Fix geometries", which also thinks the geometries are valid. Maybe fix geometries uses GEOS and needs to be enhanced with a QGIS method. It seems strange for other algorithms like "clip" to do more fixing than "fix geometries", especially in a case like this where you would think the feature could be clipped without any "fixing". Thanks. Date: Tue, 1 Jun 2021 02:45:51 -0700 (MST) From: Andrea Giudiceandrea mailto:andreaer...@libero.it>> To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: Re: [Qgis-user] Is this a bug in the vector clipping algorithm? Message-ID: <1622540751842-0.p...@n6.nabble.com<mailto:1622540751842-0.p...@n6.nabble.com>> Content-Type: text/plain; charset=us-ascii Alister Hood-2 wrote > I haven't been able to find a tool for validating or repairing geometries > that thinks there is a problem with the original geometry Hi Alister, what tool have you used to check the geometry? Have you tried to use the Geometry Checker core plugin (Vectror->Check Geometries) or the "Check validity" (qgis:checkvalidity) processing tool (with the QGIS method)? They both report errors: "duplicate node", "self contact", "duplicate nodes". Also the ArcMap/ArcGIS Check Geometry tool reports "self intersections". Anyway it seem the QGIS Clip tool does a "sanitize" of the intersection result (always converting to Multi Type). Regards. Andrea Giudiceandrea Please note that the existing 01-6476XXX / 046-9426XXX numbering ranges will no longer be available after 30th April 2021. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Rename column
In relation to editing Tables, reordering, remaning etc.. can be carried out using Refactor fields, which can be found in the Processing Toolbox Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— MSc GIS, FME Certified Professional —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie —— Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Tudorache, Marian Sent: 01 June 2021 15:27 To: Ursula Heinze ; Qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] Rename column There should be a method renameAttribute as part of QgsVectorLayer class. You can do something like that: layer = iface.activeLayer() for field in layer.pendingFields(): if field.name() == 'old': with edit(layer): idx = layer.fieldNameIndex(field.name()) layer.renameAttribute(idx, 'new') Good luck! Marian From: Qgis-user mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Ursula Heinze Sent: June 1, 2021 5:26 AM To: Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> Subject: [EXT] [Qgis-user] Rename column CAUTION: This email originated from outside of the organization. If you do not recognize the sender or you are not certain the content is safe, then do not click on any links or open any attachments. AVERTISSEMENT : Ce courriel provient d’une source externe à l’organisation. Si vous ne reconnaissez pas l’expéditeur ou si vous doutez de la sécurité du contenu, ne cliquez sur aucun lien et n’ouvrez aucune pièce jointe. Hello, I have a little problem with the field calculator. I want to rename a column, and I don´t find any way to do it. Now I tried to copy the field values in a new column with the right name, and am also not successful. Has anybody an idea for me, how to solve the problem? Many thanks in advance! Ursula Heinze Gesendet von Mail<https://urldefense.com/v3/__https:/go.microsoft.com/fwlink/?LinkId=550986__;!!P0kg3YazkQ!W94jRKLCVMrbhztEtw9jiDUPiECzoEscG5JxdIsa3_vpvGZuh4v0QGxdDJLtJD0Tmg$> für Windows 10 This electronic message, as well as any transmitted files included in the electronic message, may contain privileged or confidential information and is intended solely for the use of the individual(s) or entity to which it is addressed. If you have received this electronic message in error please notify the sender immediately and delete the electronic message. Any unauthorized copying, disclosure or distribution of the electronic message is strictly forbidden. NAV CANADA accepts no liability for any damage caused by any virus and/or other malicious code transmitted by this electronic communication. Le présent message électronique et tout fichier qui peut y être joint peuvent contenir des renseignements privilégiés ou confidentiels destinés à l’usage exclusif des personnes ou des organismes à qui ils s’adressent. Si vous avez reçu ce message électronique par erreur, veuillez en informer l’expéditeur immédiatement et supprimez le. Toute reproduction, divulgation ou distribution du présent message électronique est strictement interdite. NAV CANADA n’assume aucune responsabilité en cas de dommage causé par tout virus ou autre programme malveillant transmis par ce message électronique. Please note that the existing 01-6476XXX / 046-9426XXX numbering ranges will no longer be available after 30th April 2021. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Loading filtered database table as temp layer
Hi Michael, To add to Thayer's message. There is currently no way to do exactly what you are looking for, but, I would suggest the following as an alternative, which is simple enough to follow... There are three ways to load a filtered layer into QGIS Firstly, You can load a Layer using SQL Filter using the either the Data Source Manager or DB Manager. 1. Data Source Manager will allow you to use the Set Filter option on your selected Table 2. DB Manager will do the same when you highlight the Layer you want to load and click on the SQL Window [cid:image002.png@01D740CC.14351C50] 3. Load the Layer in in its entirety, then use the Filter option by right clicking on the layer and selecting Filter. Whichever of the above you use, the Filtered Layers can be temporally saved out as whatever format you would like while being worked on. This can be achieved by right clicking on the layer, selecting Export => Save Feature As I Hope that helps in some way. Regards, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://gov.ie/opw -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ -- MSc GIS, FME Certified Professional -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 46 942 2409 https://www.opw.ie -- Email Disclaimer: https://www.opw.ie/en/disclaimer/ > -Original Message- > From: Qgis-user On Behalf Of Michael > Gieding > Sent: 03 May 2021 19:12 > To: QGIS-User Mailinglist > Subject: [Qgis-user] Loading filtered database table as temp layer > > Hallo erverybody, > > I'm looking for a solution where users can load the output of a sql statement > from PostgreSQL as temporary layer. > The tool should be as easy as possible, as the target group is not very > experienced in QGIS. Means there should be some defined fields to enter > values for filtering and an ok-button to create the desired layer. > > One idea I tried, is to create a workflow in the graphical modelbuilder in > QGIS. In the moment it works to create a new layer with the desired SQL- > statement. I used the algorithms "PostgreSQL SQL execute and load" --> > "Load Layer to project". > But I can't find an option to load the output of the statement as a temporary. > The result is like a loaded statement from the database manager. So the > users would work with the original data within the database. > Does anyone has got an idea to achieve this? Maybe I've overseen > something. > > Of course a separate plugin would do the thing, but with my skills it's way > more difficult to achieve. > So I would be happy to solve the problem the "easy way". > > Any (other) hint is welcome. > > > Many thanks in advance. > > Michael Gieding > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user Please note that the existing 01-6476XXX / 046-9426XXX numbering ranges will no longer be available after 30th April 2021. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] First steps with 3D Scan Data?
Hi Bernd Klas Karlsson does some very interesting stuff with QGIS, a good source of tips and tricks. I find his videos always entertaining and I'm always learning something new! Regards, Rcihe —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ -Original Message- From: Bernd Vogelgesang Sent: 26 March 2021 10:32 To: Richard McDonnell ; info ; qgis-user Subject: Re: [Qgis-user] First steps with 3D Scan Data? Hi Richard, wow, this is amazing stuff in the video! For the type of things I am doing, this solution would be quit sufficient. I think the data I received is way too detailed, but I'll try to get in touch and ask them to convert it to .las if possible. Thanx a lot for all the hints! Bernd On 26.03.21 10:38, Richard McDonnell wrote: > Hi, > If you are looking for an Opensource Pointcloud Stack, have a look at > this video on youtube by Klas Karlsson > > https://www.youtube.com/watch?v=pe04m-gHM-M=1180s > > To make the above work for you , you would have needed to receive the > scan data in LAS format, it would appear that the rcwx files are > proprietary format from Trimble, and are Trimble RealWorks Project > files. The Pointcloud data is in the .tzf files Can you ask the > provider of the data to export the scan data as a LAS Format File? You > should then be able absorb the data into an Open Source Stack > i.e.Cloud Compare and QGIS 3.18 > > Hope that’s of some guidance and help. > Regards, > > Richard. > > > > > > > —— > Richard McDonnell MSc GIS, FME Certified Professional FRM Data > Management > > —— > Oifig na nOibreacha Poiblí > Office of Public Works > > Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan > Swift Street, Trim, Co Meath, C15 NX36 —— > M +353 87 688 5964 T +353 1 647 6543 > https://gov.ie/opw > > —— > To send me files larger than 30MB, please use the link below > https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie > > Email Disclaimer: > https://www.gov.ie/en/organisation-information/439daf-email-disclaimer > / > > > > —— > Richard McDonnell MSc GIS, FME Certified Professional FRM Data > Management > > —— > Oifig na nOibreacha Poiblí > Office of Public Works > > Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan > Swift Street, Trim, Co Meath, C15 NX36 —— > M +353 87 688 5964 T +353 1 647 6543 > https://www.opw.ie > > —— > To send me files larger than 30MB, please use the link below > https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie > > Email Disclaimer: https://www.opw.ie/en/disclaimer/ -Original > Message- > From: Qgis-user On Behalf Of Bernd > Vogelgesang > Sent: 26 March 2021 08:01 > To: info ; qgis-user > Subject: Re: [Qgis-user] First steps with 3D Scan Data? > > Hi Benoit, > > as I was not present when the scans were made, I can only assume that this > was a laser scanner on a tripod. > > With the sent data, there is a Trimble Scan Explorer Viewer software where I > can make a "virtual walk" through the scene, so there have to be photos but > also laser scan data as I can see from different view modes. > > As I said, this is the very first time I get in touch with this stuff, and > Google was of no big help so far. > > Besides of tons of other files, the bigger ones with around 50 to 80 MB are > .rwcx and .tzf files. > I hoped that someone would know what these file explicitly hold, and what I > have to do to get them e.g. into QGIS or other open source software. > > Cheers, > > Bernd > > On 26.03.21 08:40, info wrote: >> Hi Bernd, >> >> Well, could you give more info? E.g. what kind of scan: >> laser/lidar/photo/other? This will influence your workflow. >> >> +/-Open source laser/lidar could be based on
Re: [Qgis-user] First steps with 3D Scan Data?
Hi, If you are looking for an Opensource Pointcloud Stack, have a look at this video on youtube by Klas Karlsson https://www.youtube.com/watch?v=pe04m-gHM-M=1180s To make the above work for you , you would have needed to receive the scan data in LAS format, it would appear that the rcwx files are proprietary format from Trimble, and are Trimble RealWorks Project files. The Pointcloud data is in the .tzf files Can you ask the provider of the data to export the scan data as a LAS Format File? You should then be able absorb the data into an Open Source Stack i.e.Cloud Compare and QGIS 3.18 Hope that’s of some guidance and help. Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ -Original Message- From: Qgis-user On Behalf Of Bernd Vogelgesang Sent: 26 March 2021 08:01 To: info ; qgis-user Subject: Re: [Qgis-user] First steps with 3D Scan Data? Hi Benoit, as I was not present when the scans were made, I can only assume that this was a laser scanner on a tripod. With the sent data, there is a Trimble Scan Explorer Viewer software where I can make a "virtual walk" through the scene, so there have to be photos but also laser scan data as I can see from different view modes. As I said, this is the very first time I get in touch with this stuff, and Google was of no big help so far. Besides of tons of other files, the bigger ones with around 50 to 80 MB are .rwcx and .tzf files. I hoped that someone would know what these file explicitly hold, and what I have to do to get them e.g. into QGIS or other open source software. Cheers, Bernd On 26.03.21 08:40, info wrote: > Hi Bernd, > > Well, could you give more info? E.g. what kind of scan: > laser/lidar/photo/other? This will influence your workflow. > > +/-Open source laser/lidar could be based on lastools [1] > Open source photogrammetry could be based on AliceVision meshroom > [2,3], MeshLab [4] and blender [5] > > In photogrammetry: Agisoft metashape [6] and pix4D [7] as good > commercial products. > > BTW: 32 scans, if photos, is quite a very low number of photos for > reconstructing a 3D scene! > > Hope this helps. > Cheers, > Benoit de Cabissole > > [1] http://lastools.org/ > [2] https://alicevision.org/#photogrammetry > [3] https://github.com/alicevision/meshroom > [4] https://www.meshlab.net/ > [5] https://www.blender.org/ > [6] https://www.agisoft.com/ > [7] https://www.pix4d.com/ > > > > On 25/03/2021 23:07, Bernd Vogelgesang wrote: >> Hi folks, >> >> in a project on a former dumpside now to be transformed into a sand >> lizard habitat, I saw the chance to get my hands dirty for the first >> time on 3D scan data (terrestrial). I received 10GB of stuff, and now >> I'm completely lost. >> >> The data consists of .rwcx files, .tzf files and lots of other stuff. >> >> Is there any chance that I can process any of this data with an open >> source stack? >> Or what should be done, to make them digestible? >> >> Second step: There seem to be 32 different scans of the area form all >> angles. In case I succeed to somehow load the data, how do I combine >> them ? >> >> For the first steps, I actually "only" would like to generate a >> decent DEM from the data to be able to place some features on a map >> for the guys in charge to do the habitat stuff. >> >> Any kind of hints or links to reads about this topic would be >> appreciated >> >> Cheers, >> >> Bernd >> >> >> ___ >> Qgis-user mailing list >> Qgis-user@lists.osgeo.org >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mail
Re: [Qgis-user] merging raster layer
Hi Milena, You can use the Rescale Raster function in QGIS, you can get this by typing Rescale into the Processing Toolbox. Set your Minimum value (in your case 0), your Maximum Value (in your case 1), specify your NoData Value (if required) specify a location to save the output and click Run Hope that helps, Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://gov.ie/opw —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/ From: Qgis-user On Behalf Of Milena Muehler Sent: 24 March 2021 08:38 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] merging raster layer Hi, I'm a newcomer and use raster layers for my current analysis. I would like to combine / proceed additions / merge all layers but I need to make the values uniform right? I have a layer whose values are scaled so that the values are scaled from 0-1. (0 = no land modification 1 = high land modification). the other layer, for example population density, has simple values from a minimum of 0 to a maximum of 650,000 per pixel (for population density). I also want to scale this layer to a 0-1 metric scale. All layers should have values from a minimum of 0 to a maximum of 1. Is that possible, and if so, via which function? As you can see, I am a total beginner and have not yet had any contact with QGIS or GIS data in general. Thank you so much best regards Milena Email Disclaimer: https://www.opw.ie/en/disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Using color_rgba for symbols from field-value
Hi Bernd,
I have tested a little polygon dataset, adding a rgba field (as a text string)
and found that QGIS will actually use the Field type: string option to apply
the colour. Just select your rgba attribute and it works fine.
hope that helps.
Reagrds,
Richard
--
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
--
Oifig na nOibreacha Poibl?
Office of Public Works
Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
M +353 87 688 5964 T +353 1 647 6543
https://gov.ie/opw
--
To send me files larger than 30MB, please use the link below
https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie
Email Disclaimer:
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-Original Message-
From: Qgis-user On Behalf Of Bernd
Vogelgesang
Sent: 20 January 2021 17:32
To: qgis-user
Subject: [Qgis-user] Using color_rgba for symbols from field-value
Hi,
I would like to hard-wire the colours for categories with their rgba-values in
a field.
I have a text field named "rgba" and am searching for a way to make this
color_rgba-function working.
e.g '146,208,80,255'
It's obvious that my colour-values are an array of strings, which need to be
somehow converted to integers to be eaten by the color_rgba.
So in theory, the string '146,208,80,255' has to become an array, probably by
array("rgba"). But this array is an array of strings and not of integers.
Does anyone know how to achive this array of integers, so the
color_rgba(somemagic("rgba") returns my colour?
Cheers,
Bernd
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Re: [Qgis-user] label layer with attributes in different styles
Michael,
You are very welcome, I hope it goes some way to giving you a solution.
Regards,
RIchard
--
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
--
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
M +353 87 688 5964 T +353 1 647 6543
https://www.opw.ie
--
To send me files larger than 30MB, please use the link below
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From: Grün, Michael
Sent: 27 August 2020 16:25
To: Richard McDonnell
Subject: AW: [Qgis-user] label layer with attributes in different styles
Hi Richard,
thanx a lot for your quick answer!
Seems to be a very good solution when positioning 1 label left and 1 label
right of the point...see attached png.
My symbols will have different sizes, so I'll have to set some values in the
overridebut I'll give it a try!
Best regards from Trier/Germany
Michael
Von: Richard McDonnell
mailto:richard.mcdonn...@opw.ie>>
Gesendet: Donnerstag, 27. August 2020 16:12
An: Grün, Michael mailto:gru...@uni-trier.de>>;
qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>
Betreff: RE: [Qgis-user] label layer with attributes in different styles
Hi I have one possible solution, or work around...
1. Use your Layer to display the first part Name
2. Duplicate the layer and set it to not display symbols (Properties -
Symbology - No Symbols)
3. Label the duplicate with the "Second Half" of your Label, the Brackets
and Number.
4. Now under placement you can position the "Second half" of your Label
to line up with the first.
I have not tried it, but it's the only solution I can come up with at the
moment.
Regards,
Richard.
--
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
--
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
M +353 87 688 5964 T +353 1 647 6543
https://www.opw.ie
--
To send me files larger than 30MB, please use the link below
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From: Qgis-user
mailto:qgis-user-boun...@lists.osgeo.org>>
On Behalf Of Grün, Michael
Sent: 27 August 2020 14:28
To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>
Subject: [Qgis-user] label layer with attributes in different styles
Hi all,
Very simple example:
I have a point layer and I want to label it with 2 attributes (name, number)
and differ them within their styles.
Cologne (10)
Hamburg (14)
name || ' ' || '(' || "number" || ')'
Now I just want for more difference the number (and brackets) in another colour
(or style, bold e.g.).
Cologne (10)
Hamburg (14)
I tried it with the button "data devided override" - but changes always for
both attributes, no difference within.
I tried rule-based labeling - without result.
Allow HTML formatting number, but how?
Actually I thought this would be very simple...any hints?
Thanx a lot...kindly regards, Michael
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Re: [Qgis-user] label layer with attributes in different styles
Hi I have one possible solution, or work around...
1. Use your Layer to display the first part Name
2. Duplicate the layer and set it to not display symbols (Properties -
Symbology - No Symbols)
3. Label the duplicate with the "Second Half" of your Label, the Brackets
and Number.
4. Now under placement you can position the "Second half" of your Label
to line up with the first.
I have not tried it, but it's the only solution I can come up with at the
moment.
Regards,
Richard.
--
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
--
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
M +353 87 688 5964 T +353 1 647 6543
https://www.opw.ie
--
To send me files larger than 30MB, please use the link below
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Email Disclaimer: https://www.opw.ie/en/disclaimer/
From: Qgis-user On Behalf Of Grün, Michael
Sent: 27 August 2020 14:28
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] label layer with attributes in different styles
Hi all,
Very simple example:
I have a point layer and I want to label it with 2 attributes (name, number)
and differ them within their styles.
Cologne (10)
Hamburg (14)
name || ' ' || '(' || "number" || ')'
Now I just want for more difference the number (and brackets) in another colour
(or style, bold e.g.).
Cologne (10)
Hamburg (14)
I tried it with the button "data devided override" - but changes always for
both attributes, no difference within.
I tried rule-based labeling - without result.
Allow HTML formatting number, but how?
Actually I thought this would be very simple...any hints?
Thanx a lot...kindly regards, Michael
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Re: [Qgis-user] Displaying two or more labels(fields) in a Map
Hi, To add to this, you can also create a single string, with symbols like hyphens to break up the text, For example 1. “Attribute1”||”Attribute2”||”Attribute3” would result in Attribute1Attribute2Attribute3 2. “Attribute1”||’_’||”Attribute2”||’_’|| “Attribute3” would result in Attribute1_Attribute2_Attribute3 3. “Attribute1”||’ ‘||”Attribute2”||’ ‘|| “Attribute3” would result in Attribute1 Attribute2 Attribute3 4. “Attribute1”||’ - ‘||”Attribute2”||’ - ‘|| “Attribute3” would result in Attribute1 - Attribute2 - Attribute3 Hope that helps somewhat. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Charles Dixon-Paver Sent: 16 August 2020 11:56 To: jean Lukusa Cc: Qgis Users List Subject: Re: [Qgis-user] Displaying two or more labels(fields) in a Map If I understand what you are trying to achieve correctly, you can build the required labels by concatenating values in the expression builder [image.png] On Sun, 16 Aug 2020 at 12:44, jean Lukusa mailto:luku...@gmail.com>> wrote: Hi all. I have created two fields in my shapefile attribute table. How Can I do to display all fields (labels) on the Map ? ___ Qgis-user mailing list Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Adding layer slows down QGIS dramatically after adding a layer
Hi Peter,
One further thing you could try, if not already done, is to create Spatial
Index’s.
You can do this within QGIS under the Layer Properties, by going to the Source
tab and selecting, Create Spatial Index.
See:
https://medium.com/@wherelytics/understanding-spatial-indexes-in-ogc-geopackage-files-9960fdf71f82
Hope this helps
Richard.
——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 1 647 6543
https://www.opw.ie
——
To send me files larger than 30MB, please use the link below
https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie
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From: Qgis-user On Behalf Of Peter
Cornelissen
Sent: 14 August 2020 00:19
To: rdmaili...@duif.net
Cc: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] Adding layer slows down QGIS dramatically after adding
a layer
Hi Richard
Thanks for the suggestion. They are plain filters and I tried indexing every
table, but unfortunately it has made no noticeable difference.
Regards, Peter
On Thu, 13 Aug 2020 at 15:35, Richard Duivenvoorde
mailto:rdmaili...@duif.net>> wrote:
On 8/13/20 3:57 PM, Peter Cornelissen wrote:
> Hi
>
> I am using a Geopackage with about 15 tables (a mixture of lines, polygons
> and points), but each of these tables are
> used 40 or 50 times with filters as many of the elements are used on multiple
> layers.
> However, I am now finding that as soon as I add a new layer QGIS slows down
> and it is taking 60 seconds or more to do almost any action that involves
> redrawing (zoom in/out/ pan etc) or even moving a layer within the layers
> panel. If I save the project, close down QGIS and restart, it is fine again
> until the next time.
>
> Any suggestions?
>
> Thanks, Peter
Looking at the attributes which are used in the filters, add 'indexes' too the
tables in the Geopackage?
In QGIS you can do that by creating a connection to the gpkg with DataBase
Manager and then:
'edit table' > tab indexes, > add index
A geopackage is a sqlite database, so if you have some sql-client (DB-manager,
DB-browser) you can fire the create index query there:
CREATE INDEX "foo_index" ON "mygeopackage" ("foo_column")
Note that these are plain indexes, no spatial ones.
IF your filters are spatial filters, then off course you need spatial indexes.
HTH
Regards,
Richard Duivenvoorde
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Re: [Qgis-user] excel file import problem
Hi, Simplest method that comes to mind, is to save the excel as a CSV file and then use the Add Delimited Text Layer. Using this method you can specify which columns are the coordinate columns and it can preserve the column headings and order. Hope this helps, Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of luca cappo Sent: 23 July 2020 14:57 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] excel file import problem I use qgis Las Palmas version 2.18.24, i load an excel file who contains coordinates to create points on a map, and datas about each point; i use the plug-in ''xytopoint'' to see the points on the map then i save the excel file as a shp file. Then when i open the attributes of the shp file i see they are not corresponding to the original file, the lines and the columns are all messed up. I hope to find a solution and thank you in advance for your help. [Image removed by sender.]<https://www.avast.com/sig-email?utm_medium=email_source=link_campaign=sig-email_content=webmail> Mail priva di virus. www.avast.com<https://www.avast.com/sig-email?utm_medium=email_source=link_campaign=sig-email_content=webmail> ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Cut shapefiles
Hi Riccardo, You could try the Split with Lines tool available in the Processing Toolbox, under Vector Overlay. Just use "Split" in the search bar to narrow down the list. Hope this helps, Richard -- Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Riccardo D'Alvito Sent: 09 June 2020 17:43 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Cut shapefiles Good evening. I would like to cut a shapefile of areas with respect to a shapefile of lines in order to have a resulting shapefile of areas formed by the contours of the various lines. In other words, "Polygon" has a larger extension than "Lines" . I would like to create another area shape made up of various polygons divided according to the outline of the "Lines" shapefile. I hope I was clear. Thanks ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to calculate surface volume from UAV DEM tif files in QGIS
Sean, Ignore my first line, it’s a typo. I got dragged away to something else, came back to this and forgot to read the email before I sent it. Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Richard McDonnell Sent: 08 June 2020 17:47 To: Sean Hill ; qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] How to calculate surface volume from UAV DEM tif files in QGIS Hi Sean, As you are looking at volumes, Im assuming you have two DEM’s one with the volume you want to calculate and the other without? The link below will show you an example of this https://www.youtube.com/watch?v=pRNtux5Lxvg Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Sean Hill Sent: 08 June 2020 16:15 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] How to calculate surface volume from UAV DEM tif files in QGIS Is it possible to calculate surface volume from aerial photographs (orthomosaic maps in DEM tif file format) in QGIS? Everything I have found on the internet refers to using satellite images. I did find one article on generating surface volume from drone imagery but is difficult to understand as it is missing some steps and/or the steps aren't clear and do not render the same results from step to step even though I follow the steps to the letter. Please help Sean ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to calculate surface volume from UAV DEM tif files in QGIS
Hi Sean, As you are looking at volumes, Im assuming you have two DEM’s one with the volume you want to calculate and the other without? The link below will show you an example of this https://www.youtube.com/watch?v=pRNtux5Lxvg Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Sean Hill Sent: 08 June 2020 16:15 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] How to calculate surface volume from UAV DEM tif files in QGIS Is it possible to calculate surface volume from aerial photographs (orthomosaic maps in DEM tif file format) in QGIS? Everything I have found on the internet refers to using satellite images. I did find one article on generating surface volume from drone imagery but is difficult to understand as it is missing some steps and/or the steps aren't clear and do not render the same results from step to step even though I follow the steps to the letter. Please help Sean ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS 3.10: Dimensioning with on-board equipment
Thanks Karl, Yes that’s correct, slight typo there. For two decimal places it would be as you have shown, so for the Meters part of the dimension adding the number of decimal places will be required, but for the Centimetre, leaving the number of places off, rounds the value to the nearest whole number, so keeping it as shown would be correct. The corrected formula should look like below. round( $length, 2) || ' m' || ' ( ' || round(100*( $length) ) || ' cm)' Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Karl Magnus Jönsson Sent: 05 May 2020 10:00 To: Richard McDonnell ; hdiens...@aol.com; qgis-user@lists.osgeo.org Subject: SV: [Qgis-user] QGIS 3.10: Dimensioning with on-board equipment Hi! Wouldn’t that be round($length,2) for getting two decimal places for meters? Karl-Magnus Jönsson Från: Qgis-user mailto:qgis-user-boun...@lists.osgeo.org>> För Richard McDonnell Skickat: den 5 maj 2020 10:51 Till: hdiens...@aol.com<mailto:hdiens...@aol.com>; qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Ämne: Re: [Qgis-user] QGIS 3.10: Dimensioning with on-board equipment Hi, In my original response, I mentioned using round(100*( $length) ) || ' cm' which would give you the dimensions in centimetres only. If you want meters only then remove the 100*, which would look like this round($length) || ' m' Now if you want both dimensions shown, for example <-- 10.52m (1052cm) -->, then this can be achieved by using the following round( $length) || ' m' || ' ( ' || round(100*( $length) ) || ' cm)' Hope that helps!! Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of hdiens...@aol.com<mailto:hdiens...@aol.com> Sent: 01 May 2020 17:15 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: Re: [Qgis-user] QGIS 3.10: Dimensioning with on-board equipment Hi Richard, As I had written to you on April 20, I have successfully implemented your proposal. The only thing missing is an answer to my question: How would I have to change the command to get a result in m.(,)cm (e.g. 10.52 m or 10,52 m) format? Regards, Hartmut ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS 3.10: Dimensioning with on-board equipment
Hi, In my original response, I mentioned using round(100*( $length) ) || ' cm' which would give you the dimensions in centimetres only. If you want meters only then remove the 100*, which would look like this round($length) || ' m' Now if you want both dimensions shown, for example <-- 10.52m (1052cm) -->, then this can be achieved by using the following round( $length) || ' m' || ' ( ' || round(100*( $length) ) || ' cm)' Hope that helps!! Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of hdiens...@aol.com Sent: 01 May 2020 17:15 To: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] QGIS 3.10: Dimensioning with on-board equipment Hi Richard, As I had written to you on April 20, I have successfully implemented your proposal. The only thing missing is an answer to my question: How would I have to change the command to get a result in m.(,)cm (e.g. 10.52 m or 10,52 m) format? Regards, Hartmut ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Requesting knowledge.
Im not quite sure what you are looking for, but if you are trying to reproject a dataset from WGS84 to ITRF2014 you can use the Reproject Layer tool in the Processing toolbox. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of soe moe Sent: 16 April 2020 12:54 To: qgis-user Subject: [Qgis-user] Requesting knowledge. Dear QGIS-User Hello : Nice to meet you all. I would like to get you help. I have a little problem for projection parameter calculation of World Geodetic System(WGS84) and International Terrestrial Reference Frame (ITRF2014) for Myanmar Region. So . I would like to know where can I compute. Can I use Qgis Software computation of Parameter? If Qgis software can calculate parameter, Show me the way of Calculation process. Otherwise, Which way I Should use? Thank you all my friend. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Distincguis NULL and empty strings when reading CSV files
Hi, You should try a space in column 3, as in... col1,col2,col3 1,," " —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ -Original Message- From: Qgis-user On Behalf Of Yann Voté Sent: 15 April 2020 10:58 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Distincguis NULL and empty strings when reading CSV files Hi all, Just wondering if there is a way to distinguish null values and empty strings when loading CSV files in QGIS. What I tried so far is quoting empty strings like in the following example. col1,col2,col3 1,,"" I was expecting col2 to be NULL and col3 to be an empty string. But actual result is that both col2 and col3 are NULL. Is there another way ? Am I missing something ? Thanks in advance. Yann ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Pavement defects Identification
Hi, It would be possible, though it would depend on the raster and the bands (Red, Green, Blue, NIR etc..)you have available. It could be possible to use raster Classification to map these features, though I believe you would have quite a lot of false positives, due to shadowing, surface finish changes..etc.. If you where to look at it I would recommend the Semi-Automatic Classification Plugin https://fromgistors.blogspot.com/p/semi-automatic-classification-plugin.html It can be installed through the Plugin installer. Please also see the Link below, it may be of further interest. https://link.springer.com/article/10.1007/s12544-015-0156-6 As you may see from the above, it does suggest that you supplement the Raster Imagery with additional datasets, which should help in the detection of road defects and the overall accuracy of your results. Sorry I cant be of more help, hopefully the above will help in some way. Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of krishna Ayyala Sent: 10 April 2020 16:02 To: qgis-user Subject: [Qgis-user] Pavement defects Identification Hello, Is it possible to identify the pavement defects using a raster image with QGIS? If there is any tutorial about this, can you please direct me the tutorial. Regards. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS 3.10: Dimensioning with on-board equipment
Hi, All you need to do is modify the label. It uses an expression round( $length ) || ' m' if you change this to round(100*( $length) ) || ' cm' Hope this helps Regards, Richard McDonnell —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of hdiens...@aol.com Sent: 06 April 2020 16:21 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] QGIS 3.10: Dimensioning with on-board equipment Hallo, I have successfully implemented Paolo Cavallini<https://www.faunalia.eu/en/cv_pc_en.html>‘s proposal for dimensioning: https://geoobserver.wordpress.com/2018/02/05/qgis-bemassung-mit-bordmitteln/#comments But I have not found out how to improve the accuracy of dimensioning from meters to centimeters. I would be very grateful for a hint. Best regards, Hartmut ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Grid_Aggregation
Hi,
The only idea that pops to mind would be to ..
1. Create a Tile Index of all your raster’s with the Full Path (Absolute
Path)option
2. Style the index using a Python action similar to the following (See
Image Below as example)
qgis.utils.iface.addRasterLayer("[%location%]”, "inserted_raster")
3. You can use this to insert the raster’s into the canvas using the
index.
4. Once the nine raster’s you want are inserted build a Virtual Raster
(*.vrt) of them
5. Repeat for all other rasters
[cid:image002.png@01D5E188.56D529F0]
Hope this goes some way to a solution.
Regards,
Richard
——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management
——
Oifig na nOibreacha Poiblí
Office of Public Works
Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 1 647 6543
https://www.opw.ie
——
To send me files larger than 30MB, please use the link below
https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie
Email Disclaimer: https://www.opw.ie/en/disclaimer/
From: Qgis-user On Behalf Of aneta strzalka
Sent: 12 February 2020 07:31
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Grid_Aggregation
Hi All,
I have a question. I have a grid file with many tiles. Each of the tile has 8
adjacent tiles. I would like to make an aggregation for each tile with his 8
adjacent tiles. How can I do it in QGIS; what function should I use?
I would be very grateful for any support.
Best wishes.
Aneta.
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Re: [Qgis-user] error loading tiff layer
Hi, You can gave a raster using the correct coordinates (extents) but not with the CRS assigned. Could I suggest you utilise gdal_edit ( https://gdal.org/programs/gdal_edit.html ) and assign the CRS EPSG:3116 to the raster and try again? You can perform this within QGIS using the Processing tools just search for “edit” and select Assign Projection just select the valid CRS from the list and run it. Hope this helps, Regards, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Humberto Nel Florez Ramos Sent: 03 February 2020 11:12 To: kirk Cc: Qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] error loading tiff layer Thanks for the reply, but the file has all the information necessary to be loaded correctly. The file comes from arcgis, I have tried to load it with gvsig 2.5, SNAP desktop 6.0 and everything seems to indicate that they are not able to read the projection information correctly. i keep trying El vie., 31 ene. 2020 a las 8:01, kirk (mailto:k...@nortekresources.com>>) escribió: The file may not be a geotiff and therefore require a seco d file in the directory in which it resides. A .twf or .aux file with the same name as your tiff file. Sent from my Samsung Galaxy smartphone. Original message From: Humberto Nel Florez Ramos mailto:hnflorezra...@gmail.com>> Date: 2020-01-31 7:10 AM (GMT-04:00) To: Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> Subject: [Qgis-user] error loading tiff layer regards. I could not load a layer in tiff format. The error that qgis shows is: "No transform is available between Unknown CRS: ENGCRS [" PCS Name = unnamed ", EDATUM [" "], CS [Cartesia ... and Unknown CRS: GEOGCRS [" unknown ", DATUM [" unknown ", ELLIPSOID [" WGS 8 ... . No coordinate operations are available between these two reference systems ". The file has a reference system, which is magna-sirgas from Bogota (3116), I have tried the magna-sirgas (3116) project, and wgs84 (4326) showing the same error. The version of qgis is 3.10.2-A Coruña. thank you very much for the help and I remain attentive -- Humberto NFR -- Humberto NFR ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Reclassifying NDWI image generated from Landsat 8
Hi, You can try the SAGA tool Reclassify Values Simple, available under Processing Toolbox. Set the required Replace Condition, Use the Lookup Table to set your value bands and required outputs. Hope this helps, Regards, Richard —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of McArd Mlotha Sent: 23 January 2020 23:49 To: Qgis-user@lists.osgeo.org Subject: [Qgis-user] Reclassifying NDWI image generated from Landsat 8 Hello, I run NDWI using Landsat 8 and now I would like to reclassify the output separating water from land. Here is what I would like to reclass: -0.994 to 0.1 = 0 and 0.1 to 1 = 1 but I cannot find a tool to use in QGIS. Reading comments online, it seems "the possible reclassifies" in QGIS do not handle real data type. Is there a way to do this in QGIS? Thank you in advance, Joseph ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Attribute Assistant
Hi Ed, In addition to what Matthias said, there is also Virtual Fields an example of them can be seen here https://www.northrivergeographic.com/archives/qgis-2-6-virtual-fields http://changelog.kartoza.com/en/qgis/section/expressions-23/print/149/ I believe this may be of some help. Note Virtual fields are not saved as part of the Layer, but as Part of the active project. You could though make them permanent when you’re finished, by creating a new field and using the virtual field as the source. Hope this helps, Richard. —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Matthias Kuhn Sent: 21 January 2020 20:32 To: Ed Hawkins ; Qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] Attribute Assistant Hi Ed, I must acknowledge my complete lack of the ESRI tools, so I am left with the first hits I find in an internet search to guess what it does exactly. My first guess is, that "default value" configuration is what you are looking for. There is support for QGIS expressions - which opens up a wide variety of possibilities. Matthias https://gis.stackexchange.com/a/211154/9839 On 1/21/20 8:44 PM, Ed Hawkins wrote: ESRI has a tool called attribute assistant for automatically populating attributes based on certain criteria that can be set up for certain methods is there such a tool for QGIS? -- Ed Hawkins ___ Qgis-user mailing list Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Restricting project extent in QGIS
Hi, Im not sure what format your vector layers are in, but if you are dealing with a large layer, then you could look at uploading to something like PostGIS, you could then apply a filter when adding the layer to only load data in your area of interest. You could also look at using a filter on your existing datasets, one further thing you can look at is using Zoom Levels (Scale range) to stop the rendering of data beyond a certain zoom level, only allowing you to view the data at certain levels. Regard's, Richard McDonnell —— Richard McDonnell MSc GIS, FME Certified Professional FRM Data Management —— Oifig na nOibreacha Poiblí Office of Public Works Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 —— M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ -Original Message- From: Qgis-user On Behalf Of Shriramana Sharma Sent: 06 January 2020 14:48 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Restricting project extent in QGIS Hello. I am using QGIS 3.4 LTS on Kubuntu Bionic LTS. I am using several global datasets like NaturalEarth, HydroRIVERS etc. Loading all of them takes too much time and memory especially on my laptop. I am mostly working in India area only. So I'd like to apply some settings in my project to tell QGIS to load features from within India only for performance reasons. It is acceptable to have it as a lat/lon extent constraint rather than clipping to a polygon. There is existing advice on how to clip data to given polygons (https://guides.library.duke.edu/QGIS/Clip) but I don't want to maintain separate shapefiles etc with clipped data. So I'd prefer to set it in the project using global upstream data. https://gis.stackexchange.com/questions/277297 seems to indicate that this is possible in ArcGIS. But how can I achieve this in QGIS? -- Shriramana Sharma ஶ்ரீரமணஶர்மா श्रीरमणशर्मा ူ၆ိျိါအူိ၆ါး ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] question about GDAL module ( QGIS 3.4.14-1 and 3.10.1-A)
Hi Cinda, I cant help diagnose the issue, but I can give you an alternative method of using gdal_polygonize Im assuming you are using this under Windows. Using the OSGeo4W Shell, navigate to the folder containing the dataset and then use gdal_polygonize raster_in.tif -f "ESRI Shapefile" shapefile_out.shp You can alternatively use the full file path also instead of navigating to a specific folder. A full list of additional commands can be found here https://gdal.org/programs/gdal_polygonize.html It should be quicker anyway than trying to run it from within QGIS Regards, Richard -- Richard McDonnell MSc Geographic Information Systems, FME Certified Professional FME Certified Professional FRM Data Management -- Oifig na nOibreacha Poibl? Office of Public Works Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36 Jonathan Swift Street, Trim, Co Meath, C15 NX36 -- M +353 87 688 5964 T +353 1 647 6543 https://www.opw.ie -- To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonn...@opw.ie Email Disclaimer: https://www.opw.ie/en/disclaimer/ From: Qgis-user On Behalf Of Cinda Graubard Sent: 10 December 2019 19:46 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] question about GDAL module ( QGIS 3.4.14-1 and 3.10.1-A) I'm trying to access a few gdal modules and keep getting this message: 2019-12-10T11:22:46 INFOGDAL execution console output C:\OSGeo4W64\bin\python3.exe: No module named gdal_polygonize I encountered this problem with 3.10.1-A and then went back and installed the last ltr 3.4-14-1 and have the same error. I've checked the packages installed through the advanced installer, and the GDAL/OGR library and comandline tools are included, though I'm not extremely familiar with this interface so I could be missing something. Can anyone suggest a solution for this? Thanks, Cinda ... Cinda Graubard GeoMax 303.440.4539 office 720.272.9812 mobile GIS for Mineral Exploration 2D and 3D Visualization, Integration, Analysis, Modeling Project and Data Management Data capture and conversion Databases Software Sales and Training [earthtiny] ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to Save Intermediate Edits
Hi, Hi, If you are automatically fixing the geometries I believe that any modified geometries are saved as you go through the process, so you can I THINK click Abort and a window will pop up saying how many geometries have been fixed. If you are manually updating the data, you can commit changes as you go by selecting the Save Layer Edits icon [cid:image001.png@01D59555.322015E0]It will allow you to continue editing but commit completed edits. Hope this helps, Richard From: Qgis-user On Behalf Of smiller...@cfl.rr.com Sent: 06 November 2019 21:39 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] How to Save Intermediate Edits Hi- I'm hoping that I am doing something stupid. I digitized 2793 polygons and 156 of them had errors when checked by Geometry Validation. I proceeded to work off the list of problems but want to stop and save my work. The problem is that when I toggle edit and am prompted to save, the save doesn't work because I have remaining edits. How do I save intermediate edits or otherwise bypass these checks without losing my edits? Thanks. Steve Email Disclaimer: http://www.opw.ie/en/disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] identifting tools and clipping polygones
Hi, The Identify tool is [cid:image001.png@01D5932E.8D413FE0] Clipping polygons can be carried out from under Vector – Geoprocessing Tools - Clip Polygon Depending on what you want to do you can also find additional tools in the Processing Toolbox just type Clip into the Search Bar. If the Toolbox isn’t on your screen, you can activate it by going to Processing - Toolbox IF ITS ACTIVE THIS WILL ALSO DE-ACTIVATE IT. Hope this goes some way to helping. Reagrds, Richard. From: Qgis-user On Behalf Of jean Lukusa Sent: 04 November 2019 16:20 To: Qgis Users List Subject: [Qgis-user] identifting tools and clipping polygones Hi all .would you help me find identifying tool and doing clip polygones successfully un Qgis3.10 Exploration and Mining Geologist +243(812156128/973741744) Email Disclaimer: http://www.opw.ie/en/disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] coordinates labels
Apologies, extra bracket!! concat(to_string( round(@grid_number,2)), '°') Regards, RIchard From: Richard McDonnell Sent: 24 October 2019 10:13 To: 'bernard ngoruse' ; qgis-user@lists.osgeo.org Subject: RE: [Qgis-user] coordinates labels Hi Bernard, Use the something like the following From: Qgis-user mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of bernard ngoruse Sent: 24 October 2019 10:03 To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: [Qgis-user] coordinates labels Hello. I an trying to label coordinates using the degree sumbol. The statement is : concat(to_string(@grid_number), '°') which produces + 39.05 +39.0994 +39.1499 Interval between each coordinate is 0.05 degrees. How do I avoid the long decimal points? Regards, == Bernard K. Ngoruse, MSc.,Reg. Geologist, Lead Expert, EIA & EA Cell: +254723153469 email: bkngor...@yahoo.com<mailto:bkngor...@yahoo.com>, ngoruse07.2...@gmail.com<mailto:ngoruse07.2...@gmail.com> == Email Disclaimer: http://www.opw.ie/en/disclaimer/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
