Re: [Qgis-user] Georeferencing images

[Nicolas Cadieux]

Hi,
Play with the placement algorithms.  Start with  the basic Helmert with 2 or 
more points. Anything more than 2 points and you will see where the distortions 
come from and give you an idea of what your are dealing with.   Finish with 
Thin Plate Spline (TPS).
Nicolas

> Le 21 juill. 2018 à 14:33, Wolstan H M Dixie  a 
> écrit :
> 
> Thanks everyone - I discovered the Plugin! However it takes a bit of 
> practice, and sometimes it fails to position the image correctly - I 
> think it needs more that 4 points, probably about 8, to work properly.
> 
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Re: [Qgis-user] Georeferenced raster images

[Nicolas Cadieux]

http://www.qgistutorials.com/fr/docs/georeferencing_basics.html

> Le 21 juill. 2018 à 01:13, Patrick Dunford  a écrit :
> 
> I do this using Gimp to create new composite tiles based on existing 
> georeferenced contemporary aerial photo map tiles.
> 
> I believe there is a georeferencing plugin available but I was unable to 
> achieve what I needed with it because it didn't appear to be capable of 
> matching up the coordinates.
> 
> 
>> On 21/07/18 10:49, Wolstan H M Dixie wrote:
>> Hi - I am a new user struggling to pick up the fundamentals - I have
>> successfully imported a LIDAR raster layer and hillshaded / pseudo
>> coloured / contoured it.
>> 
>> My problem is that I want an image of a topographical map  behind it as
>> a base map to provide context.
>> 
>> The GIS I am familiar with had the facility to take an image eg TIFF,
>> JPG, PNG, georeference the four corners, and import it into a layer so
>> that it was matched to the vector map. This seems a simple and I should
>> have thought common requirement eg you want to put a TIFF of a historic
>> map behind the modern map you are creating.
>> 
>> I cannot see any way of doing it - am I being obtuse?
>> 
>> Any help appreciated
>> 
>> Wolstan
>> 
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Re: [Qgis-user] extract Z value along line

[Nicolas Cadieux]

Hi,
Or you could make a line, extract the nodes and then use the point sampling 
tool.  If you create a straight line with two nodes, you can densify the line. 
This way, the nodes will be evenly spaced.
Nicolas 

> Le 21 juill. 2018 à 08:56, Micha Silver  a écrit :
> 
> "Profile Tool" plugin 
> 
> 
>> On 07/21/2018 03:51 PM, David Fox wrote:
>> Is anyone aware of a workflow to extract Z values from a raster along a line 
>> -- essentially point sampling but at nodes?
>> 
>> Cheers, 
>> David 
>> 
>> 
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> -- 
> Micha Silver
> Ben Gurion Univ.
> Sde Boker, Remote Sensing Lab
> cell: +972-523-665918
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Re: [Qgis-user] qgz format and non-ascii project names

[Nicolas Cadieux]

Hi,

I can’t confirm as I don’t have a computer in front of me but I have had 
multiple problems in the past with people making paths with spaces or accents 
in characters. (Including the user path in windows.). Best to stay with no 
spaces and only “English” characters. This does not only apply to Qgis but it 
is probably worse because of all the plugins.  Not every programmer takes the 
time to look at character tables in their code. (I am guilty as charged...)

Nicolas

> Le 19 juill. 2018 à 07:54, Micha Silver  a écrit :
> 
> I just noticed that a QGZ project file with non-ascii characters in the name 
> will not open. No error message, it just doesn't open. The same project, 
> saved as QGS opens fine, and if I save project as QGZ with only ascii 
> characters, it also opens fine.
> Can anyone confirm?
> Thanks, 
> -- 
> Micha Silver
> Ben Gurion Univ.
> Sde Boker, Remote Sensing Lab
> +972-523-665918
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Re: [Qgis-user] minimum and recommended specs for a laptop?

[Nicolas Cadieux]

Hi,

My experience is that over heating laptops is often caused by dust in old fans. 
 Fans can be changed or cleaned but it does take some skills to do that.  A 
shop can do it for 50-100$.  The second problem is that companies use cheap 
parts.  

I would go the computer that has a cpu made with the finest lithography (14mn) 
but even that will not help with a cheap computer.  I did not look at the HQ 
options you are referring to. Go to Intel and the the exact spect for the cpu 
serial number.  Look at lithography, cache, onboard video card ...

https://www.intel.com/content/www/us/en/products/processors/core/i7-processors.html

Gaming laptops may help as they are generally made with more rugged parts.  You 
may also look at professional laptop built for CAD.  They will generally come 
with pro video cards that may not be very helpful but the rest of the computer 
should be better built.  I am usually happy with a pro level Lenovo laptop. 
(Not found in a store).  They last long, are more expensive but generally come 
with a limited intel video card.  That is the trade off.

My recommendations is that you should always consider the maximum memory you 
can put in the laptop as that is the only upgrade you can do appart from the 
HD.  Make sure you can change the HD (not an option with most resent MACs). Buy 
and SSD if you can.  That is probably the most important option (along with 
memory) you can select that will speed up large datasets.

Nicolas



> Le 19 juill. 2018 à 05:32, Steven Drake  a écrit :
> 
> Hello, 
> 
> I'm thinking of buying a laptop and wondering about the minimum and 
> recommended specs for a laptop to run QGIS 3.x? The plan is to use Ubuntu as 
> the OS and the laptop for writing scripts, working on Process Models, etc... 
> with occasional full blown tests using 'large' (+500,000 polygon) shapefiles. 
> My desktop is more than sufficient for this but I'm looking for something to 
> use when travelling. 
> 
> I used to have a somewhat decent laptop but it is older and gets crazy hot... 
> and does not do well with larger shapefiles. The old laptop case actually 
> deformed slightly in the hot areas which screams to me "fire hazard!" and 
> therefore is no longer used. I'd like to avoid those issues with the new 
> laptop.
> 
> The laptops on the market seem to be mainly 7th generation Intel processors 
> with a wide variation in performance. Just to keep this simple, let's 
> consider i7 types. There are designations ending with a "U" which use less 
> power, create less heat and used in lower performing computers. Then there 
> are the "H" and "HQ" processors in higher end computers which sound more 
> capable and use more power. 
> 
> I'm guessing a "U" processor will be overtaxed by the scenario in the first 
> paragraph. So *if* it does not crash it will run to the design limit and heat 
> up. If using the "H" or "HQ" processors it will likely not crash, produce 
> lots of heat but maybe not too much since it is designed for such intensive 
> applications? 
> 
> Am I understanding the situation correctly? What else might play a 
> significant role in the heat issue? What about laptops with built in cooling 
> systems beyond the normal fans and heat sinks? And most importantly... how to 
> pick a computer / processor / other items capable of running QGIS with large 
> datasets? How to find a reasonable middle between performance and heat? 
> ...and of course not cost too much? Gaming computers
> 
> Thank you, 
> 
> --S
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Re: [Qgis-user] CRS was undefined: defaulting to CRS EPSG:4326 - WGS 84

[Nicolas Cadieux]

Hi, 
The error as noted by other can come from the raster that has as missing CRS 
file.  Same reasoning applies to raster files.  The .tiff format can have and 
internal tag to specify the CRS.  You can write the tag using gdal edit.  
http://www.gdal.org/gdal_edit.html
Nicolas

> Le 19 juill. 2018 à 07:34, Nicolas Cadieux  a 
> écrit :
> 
> Hi,
> You can simply left or right click the layer in the layer panel and define 
> the layer CRS.  What you are seing is not an error but your default option to 
> do when your Qgis tries to open a file that does not contain a CRS.  You can 
> go to your system setting to the section on “what to do when opening a file 
> without a CRS.”  Select “ask” and not “use default CRS or use project CRS “.
> 
> Shp files (I guess you are using that format) uses a .prj extension file for 
> the CRS.  If that file is missing, you will have that message.
> Nicolas
> 
>> Le 19 juill. 2018 à 00:09, Andrew Davies  a 
>> écrit :
>> 
>> I am in Tasmania, Australia which is CRS EPSG: 28355 - MDA94 / MGA Zone 55 
>> 
>> When opening a contour vector file which has been generated in the local CRS 
>> on Drone Deploy I am getting the following error:
>> CRS was undefined: defaulting to CRS EPSG:4326 - WGS 84
>> 
>> I am running QGIS 2.18.21 Las Palmas which was working fine for a while.
>> All I had done leading up to this error was open a raster DEM file and try 
>> to extract contours for the DEM. The extraction lagged out and I reset my 
>> laptop.
>> 
>> I have deleted an Reinstalled with no luck. 
>> 
>> Kind regards. 
>> 
>> Andrew
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Re: [Qgis-user] CRS was undefined: defaulting to CRS EPSG:4326 - WGS 84

[Nicolas Cadieux]

Hi,
You can simply left or right click the layer in the layer panel and define the 
layer CRS.  What you are seing is not an error but your default option to do 
when your Qgis tries to open a file that does not contain a CRS.  You can go to 
your system setting to the section on “what to do when opening a file without a 
CRS.”  Select “ask” and not “use default CRS or use project CRS “.

Shp files (I guess you are using that format) uses a .prj extension file for 
the CRS.  If that file is missing, you will have that message.
Nicolas

> Le 19 juill. 2018 à 00:09, Andrew Davies  a 
> écrit :
> 
> I am in Tasmania, Australia which is CRS EPSG: 28355 - MDA94 / MGA Zone 55 
> 
> When opening a contour vector file which has been generated in the local CRS 
> on Drone Deploy I am getting the following error:
> CRS was undefined: defaulting to CRS EPSG:4326 - WGS 84
> 
> I am running QGIS 2.18.21 Las Palmas which was working fine for a while.
> All I had done leading up to this error was open a raster DEM file and try to 
> extract contours for the DEM. The extraction lagged out and I reset my laptop.
> 
> I have deleted an Reinstalled with no luck. 
> 
> Kind regards. 
> 
> Andrew
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Re: [Qgis-user] Contour Smoothing Issue

[Nicolas Cadieux]

Hi,

I find that the best way to do this is to smooth the raster before extracting 
the contour lines.  I guess the generalize plugin does not handle the z in the 
shape files and therefore save the shp as a 2D file.  Grass has good options 
for generating contour lines and much of the noise can be reduced using the 
Grass options.

Nicolas

> Le 18 juill. 2018 à 19:09, Andrew Davies  a 
> écrit :
> 
> I am losing the Z axis on contour lines when smoothing or removing small 
> objects using the generalize plug in. This also happens when smoothing or 
> simplifying geometry. 
> 
> My workflow is to extract contours from DroneDeploy, Then smooth and remove 
> small objects in QGIS then save as a DXF and open in ACAD. When opening in 
> ACAD there is no z axis on the contours after smoothing. If the lines are 
> extracted from drone deploy and not tampered with the Z axis remains intact 
> when exported to a DXF and opened in ACAD. 
> 
> I believe because it's moving the contour lines when smoothing, it's deleting 
> the z axis data. Is there a way to keep this data intact? 
> 
> This is my first post on the mail list so I apologize if my description is 
> lacking information. 
> 
> Thank you very much.
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Re: [Qgis-user] Newby trying to load OSM place search plugin

[Nicolas Cadieux]

Perhaps 

http://www.qgistutorials.com/fi_FI/docs/downloading_osm_data.html

> Le 29 juin 2018 à 13:37, Cerasini, Vance S  
> a écrit :
> 
> Hello,
>  
> I am really new to QGIS after coming off 20+ years in the ESRI world.
>  
> I loaded the OSM place search plugin, but I can’t get the panel to come up. 
>  
> Can anyone help?
>  
> Thanks
>  
>  
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Re: [Qgis-user] QGIS and ESRI's ArcMAp

[Nicolas Cadieux]

Hi,
Hard to answer but I used to be a big MapInfo, AutoCAD Map user.  I usually 
just use ESRI when other have problems I need to trouble shoot.  Now, i am 
almost exclusively QGIS.  Like others say, it would be hard to make a list as 
QGIS aim is not to just do what others do.  It’s not a copy of other softwares.

There are currently two things that I would like to see in QGIS.  The first is 
a good raster calculator capable of dealing rapidly with HUGE rasters that 
can’t fit into memory. (I am talking LiDAR huge over large territory.)  
(Thankfully, the gdal calculator does it but it was more restrictions 
(identical size,CRS, pixel posting..). I AM not sure ESRI has a flexible way of 
doing that.  

ESRI also has the concept of a raster database.  That is not implemented but 
when you think about it, it’s easy to just keep track of the descriptive values 
in another table.

Nicolas

> Le 29 juin 2018 à 07:59, Crosby, Scott  a 
> écrit :
> 
> Good morning,
>  
> Are there tools and/or capabilities unique to QGIS that are not available in 
> ArcMap? I’m currently using ArcMap 10.5.1, and recently installed QGIS.
>  
> Scott Crosby, C.F.
> Forestry Supervisor II, Etoniah Creek State Forest
> Florida Forest Service
> Florida Department of Agriculture and Consumer Services
> Certified Forester #12604, Society of American Foresters
>  
> Office: (386) 329-2555
> Fax: (386) 329-2554
> scott.cro...@freshfromflorida.com
>  
> www.FreshFromFlorida.com
>  
> Please note that Florida has a broad public records law (Chapter 119, Florida 
> Statutes). Most written communications to or from state employees are public 
> records obtainable  by the public upon request. Emails sent to me at this 
> e-mail address may be considered public and will only be withheld from 
> disclosure if deemed confidential pursuant to the laws of the State of 
> Florida.
>  
>  
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Re: [Qgis-user] QSIG

[Nicolas Cadieux]

Hi,
I see others have well responded so I will just add that QGIS does not look for 
a license when it starts up unlike other proprietary cad and Gis software that 
either look for a license during the install or when the software is running 
(like SolidWorks). It has a true OpenSource license. 
Nicolas

> Le 27 juin 2018 à 10:31, pompo santos  a écrit :
> 
> Hello.
>  
> I would like to ask if software QSIG has any special requirements to use it 
> or , if is it required to have internet use always ?
> Which internet ports does the application use? Do you have any requirements?
>  
> - Is this installation required to bypass firewall or , proxy in a company?
>  
> -Do I have to open a special port in firewall?, or , just internet port HTTPS?
>  
> Thanks,
> Regards,
> 
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Re: [Qgis-user] How can I display satellite images in hdf format in RGB color?

[Nicolas Cadieux]

Hi,

Try gdal_translate with the -sds switch.  You find a GUI version in the raster 
menu or in processsing.  That should split all your bands into individual 
single band tiff.  Then you will need to figure out what band you want to 
display to make the rgb.  Maybe the semi automatic classification plugin has an 
easier way of doing this.

Nicolas


http://semiautomaticclassificationmanual-v5.readthedocs.io/fr/latest/tutorial_1.html


http://www.gdal.org/gdal_translate.html
-sds:
Copy all subdatasets of this file to individual output files. Use with formats 
like HDF or OGDI that have subdatasets. The output file naming scheme has 
changed in GDAL 1.11 (e.g. ofile_1.tif, ofile_2.tif).


> Le 26 avr. 2018 à 00:43, Yoshie Ishii <18am4...@vc.ibaraki.ac.jp> a écrit :
> 
> Hello everyone.
> I am using version 2.18.18.
> How can I load satellite images in hdf format and display them in RGB color?
> I tried to convert hdf format into tiff format, and then load satellite 
> images as tiff format.
> But I would like to do that more easily. 
> Kind regards.
> 
> Yoshie Ishii
> 
> 
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Re: [Qgis-user] how many layers

[Nicolas Cadieux]

Hi,

I am not sure what you meet by « preset ». But if you are talking about the 
maximum number of files, it is several hundred.  I think I was having problems 
after around  512 shape files.  I am not sure the source of this limitation.  
Some says it’s a windows limit, others says it’s a C limite.  What even the 
case, I solved my problem by using Saga on windows 7 and 10. 

This limit seems less of a problem in Linux as the max number of open file it 
can be changed but you should be able to open more than 10 files.

It would help if you added what Operating System you are using, what type of 
files you are opening and the error messages you are getting.

Nicolas

> Le 24 juin 2018 à 03:37, Boaz Bar Ilan  a écrit :
> 
> hi
> I use version 2.18.18
> 
>  is there limitation to the  no of preset ?
> 
> I kept 10 presets and now it doesn't allow 
> 
> thanks
> 
> boaz
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Re: [Qgis-user] How to combine multiple rasters into a tilesarray?

[Nicolas Cadieux]

Hi,
Someone else was having that exact same problem.  He saved the file in a tiff 
format and that solved the problem I think.
Nicolas

> Le 21 juin 2018 à 17:15, Joep Orbons  a écrit :
> 
> Hi Nicolas, 
> 
> Good idea, the virtual layer is a new option to me. I tried it on a multitude 
> of files and it produced a strange pallette image, mostly black. I'll try it 
> with some less files first and see what that brings, in small steps. 
> But any good suggestion is welcome. 
> 
> Best wishes,
> 
> Joep
> 
> drs. ing. Joep Orbons
> Senior Archeoloog, Senior Specialist Geofysica
> St Jozefstraat 45, 6245 LL Eijsden
> Tel: +31 43 3672586
> email: j.orb...@archeopro.nl 
> Web: www.archeopro.nl
> 
> 
> 
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Re: [Qgis-user] How to combine multiple rasters into a tilesarray?

[Nicolas Cadieux]

Hi,
I am not sure to understand but you can build a virtual raster (but I think you 
tried that?). I think there is a plugin also that can give you more options.  
If not, you can use  command line to make sure you have the exact order of the 
files. The order of the files are from bottom to top except for null pixels.  
QGIS 2.x gave you more options then QGIS 3.  :(.  
Nicolas

> Le 21 juin 2018 à 09:32, Joep Orbons  a écrit :
> 
> Using QGIS 2.14.3 Essen at Windows 10 Prof. 
> 
> Being rather new to QGIS but not to GIS, I'm still trying to find my way in 
> the  QGIS system. 
> I can "Add Raster Layer" to show a raster. Multiple raster, no problem, they 
> all fit nicely. 
> When I select one of the rasters in the "Layers Panel", I can select "Layer" 
> "Save as" as a geotiff with VRT options and parameters. It results in a nice 
> series of tiles. 
> But how do I make one series of tiles for multiple rasters? 
> I tried "Raster" "Merge" to make multiple rasters into one big raster. But my 
> rasters are large, spanning a huge area. So making them into one large raster 
> is not an option. 
> What options can I use to make the multiple rasters into a series of tiles, 
> respecting the order of the files as they are in the "Layers Panel"?
> 
> Thank,
> 
> Joep 
> 
> drs. ing. Joep Orbons
> Senior Archeoloog, Senior Specialist Geofysica
> St Jozefstraat 45, 6245 LL Eijsden
> Tel: +31 43 3672586
> email: j.orb...@archeopro.nl 
> Web: www.archeopro.nl
> 
> 
> 
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Re: [Qgis-user] trying to convert geotiff UTM toWGS84

[Nicolas Cadieux]

Hi,
If you are using gdal translate with -a_srs "EPSG:4326", you are simply 
overwriting the CRS in the file. That is likely messing thing up as the file is 
not actually reprojected.  
Nicolas

> Le 18 juin 2018 à 03:40, Donald Harter  a écrit :
> 
> I started out trying to merge some geotiff topo maps of a state.  I kept
> getting results that were all black.  It seems that style was palletee
> unique values and that merge could not handle that.  So I converted them
> to multiband color using gdal_translate.  Some of the merged topos were
> not lining up next to each other as they should.  It seems that they
> were on the edge of a UTM region, each one in a different one.  So I
> decided to convert them to WGS84 latitude and longitude.  I can
> partially do that but when I display the files the coordinates seem to
> be in utm instead of latitude and longitude.
> Here is info on one such file:
> 
> Original
> out2
> Name
> out2
> Source
> /tmp/out2.tif
> Provider
> gdal
> CRS
> EPSG:4326 - WGS 84 - Geographic
> Extent
> 212740.210783953285,3630863.9934609998017550 :
> 413984.418707916719,3772545.199039864863
> Unit
> degrees
> Width
> 7923
> Height
> 5578
> Data type
> Byte - Eight bit unsigned integer
> GDAL Driver Description
> GTiff
> GDAL Driver Metadata
> GeoTIFF
> Dataset Description
> /tmp/out2.tif
> Compression
> 
> Band 1
> STATISTICS_MAXIMUM=255
> STATISTICS_MEAN=238.21578824081
> STATISTICS_MINIMUM=131
> STATISTICS_STDDEV=37.09178797644
> More information
> AREA_OR_POINT=Area
> TIFFTAG_DATETIME=1996:10:29 16:21:10
> TIFFTAG_IMAGEDESCRIPTION=USGS GeoTIFF DRG 1:25 Quad of Tularosa.
> Product:487866
> TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
> TIFFTAG_SOFTWARE=USGS CD Archiver program tif2usgsdrg v.1.0
> TIFFTAG_XRESOLUTION=250
> TIFFTAG_YRESOLUTION=250
> Dimensions
> X: 7923 Y: 5578 Bands: 1
> Origin
> 212740,3.77255e+6
> Pixel Size
> 25.4,-25.4
> Its coordinates are EPSG:4326, but they display as UTM and not latitude
> and longitude.  It is as if the pixel data coordinates were not
> converted but everthing else one.  I have tried gdaltransform and
> gdal_translate.
> So how do I do this? Maybe I am forgetting a parameter.
> Here is what I ran on the command line after the gui did not work:
> 
> gdal_translate -a_nodata 0.0 -ot Byte -a_srs "EPSG:4326" -expand rgba
> -of GTiff /srv/data/nm_topo/scale_250k/c33106a1.tif /tmp/out2.tif
> 
> gdalwarp  -ot Byte -s_srs "EPSG:4267" -t_srs "EPSG:4326"  -of GTiff
> /srv/data/nm_topo/scale_250k/c33106a1.tif /tmp/out2.tif
> 
> I am using the latest version of qgis.  If I try to use -expand in the
> processing gui for translate it says that it is an invalid parameter.
> It works on the command line though.
> 
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Re: [Qgis-user] Export segment values in polyline in excel

[Nicolas Cadieux]

Hi,

Just use the field calculator to create a new column with the length.  Then you 
can save the file in csv and export it to Excel.

http://www.qgistutorials.com/en/docs/calculating_line_lengths.html
Nicolas

> Le 15 juin 2018 à 07:48, daniel pinto  a écrit :
> 
> Dear sirs i have an image with several polylines to measure the elements in 
> need in said image i need to have the segments measure of each polyline 
> exported to excel... thru the atribute table... is that possible??? 
> 
> Thank you in advance!!
> 
> 
> -- 
> daniel pinto
> arqueólogo
> daniel.ar.pi...@gmail.com
> 91 869 1397
> rua de Arouca, nº 10, 1º esq, 3810-050 - Aveiro
> 
>
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Re: [Qgis-user] Unable to load project

[Nicolas Cadieux]

Hi,
Simply because the express desktop will usually install most of what I need.   
As I also need special packages and libraries for programming in python, I 
usually add those after.  I just got used to do it like and as I often do the 
install on multiple computers, I find it a little bit faster.
Nicolas

> Le 13 juin 2018 à 02:21, Springfield Harrison  a écrit :
> 
> Hello Nicolas,
> 
> Thanks for those instructions, likely will save me considerable time.  Your 
> instructions seem quite straightforward but just curious why you would not 
> skip the express desktop install and go straight to the advanced install 
> directly?
> 
> Thanks again…
> 
> Cheers . . . . . Spring .
> 
> 
> 
>> On 12-Jun-2018 08:25, Nicolas Cadieux wrote:
>> Sorry, 
>> Attached images were too big.  Resending without the screen shots.
>> 
>> Nicolas
>> 
>>> On 2018-06-11 7:16 PM, Nicolas Cadieux wrote:
>>> Hi,
>>> 
>>> As usual, answer below.
>>> 
>>> Nicolas
>>> 
>>>> On 2018-06-11 1:10 PM, Springfield Harrison wrote:
>>>> Greetings again,
>>>> 
>>>> Thanks for the comments again.
>>>> Regarding the versions, things are not actually as I imagine.  My 
>>>> assumption that higher numbers indicate a newer version appears to be 
>>>> incorrect.  I presume this is documented somewhere and will try to sort 
>>>> through all that when I get time.  This is a good example of why I am 
>>>> reluctant to wade into the upgrade end of the pool.  Workload well out of 
>>>> proportion to the presumed benefits.
>>> The Osgeo4w installer makes this easy for you.
>>>> Where is the logic here - "so actually it would not be a "step backwards" 
>>>> to go from 2.8  to 2.18."?  Sorry to be difficult but why does QGIS 
>>>> versioning need to be studied, when it could easily be intuitive?  
>>> They are not numbers.  Logic is found here: 
>>> https://qgis.org/en/site/getinvolved/development/roadmap.html
>>>> 
>>>> Will osgeo4w install an LTR?
>>> I believe the express install will only install the latest stable 3.x 
>>> version (select Express Desktop Install.  The Express Web-GIS install 
>>> option is for a web server).  The Advance Osgeo will add options.
>>> a) Select "Advanced Install"
>>> b) Select  "Install from the Internet"
>>> c) Select the Root Directory (C:\OSGeo4W64 is suggested.  I would not 
>>> change it.  If you do, make sure you have no space " "or funny character 
>>> like in "c:\José Qgis installation").  This is where the program file will 
>>> be placed.
>>> d) Select Install for "All Users" and "Create icon on Desktop" and "Start 
>>> Menu".
>>> e) Local Package Directory will be offered.   
>>> "C:\Users\Admin\AppData\Local\Temp" .  Don't need to change it.  That is 
>>> where the installation files will be downloaded.
>>> f) Select the Internet Connection. Default is "Direct Connection".
>>> g)Choose a Download site.  Default is http:/download.osgeo.org.
>>> h) Look at the final screen shot I sent you.  I you select "desktop", you 
>>> will see current version  number (if installed) and the new version number. 
>>>  Select "qgis: QGIS Desktop" for 3x or "qgis: qgis-ltr-full." for 2.x.  Or 
>>> both.  Other packages will be selected for you (like Saga, Grass.) Do not 
>>> deselect them.  You will also need to accept all licences  during the 
>>> install and you will probably be asked to add extra packages along the way. 
>>> Accept them. 
>>> 
>>> For me, the normal procedure on a new computer is to start with an Express 
>>> Desktop Install.  Then, I do an "advance Install" to add extra packages or 
>>> different versions of QGIS.
>>> 
>>> Nicolas
>>>   
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Re: [Qgis-user] Unable to load project

[Nicolas Cadieux]

Hi,
Answers below.
Nicolas

> Le 11 juin 2018 à 04:40, DelazJ  a écrit :
> 
> Hi,
> 
> 2018-06-11 8:30 GMT+02:00 Springfield Harrison :
>> Hello All,
>> 
>> Thanks again for your insights, sorry for the delayed response.  Very 
>> helpful to get the different perspectives.
>> Yes, I understand the need for constant development and improvements.  And 
>> hence the need for some users to run multiple installations for comparative 
>> purposes.  I'm not in that league so only need something that works reliably.
Then I would go for the LTR 
>> Again, I understand the benefits of using a Linix installation but at this 
>> stage I'm not keen on managing more than one operating system.  In this 
>> realm, I would be considered an advanced amateur or lower-level expert in 
>> computer management and GIS so taking on major challenges is not something I 
>> would relish upon waking up each morning.
I agree. Pick your battles!  I have done the same for my PH.D.  When open 
source 99% but not for Windows.  That will be after.
>> Thanks for some clarity on to installation processes.  It would seem that 
>> for the most utility, osgeo4w would be the preferred choice.  It turns out 
>> that I had installed 2.8.1 as a standalone and am now running it 
>> successfully.  It would seem unlikely that I should fall back to 2.18?
2.18 is not a fall back.  It is a few years newer than 2.8x  

https://qgis.org/en/site/getinvolved/development/roadmap.html
>> Again, mixed signals here regarding versions, some advise 3.0, others 2.18, 
>> while I am succesfully using 2.8.1.  It would seem that 3.0 might be a good 
>> idea, would there be any obvious reason not to migrate?
Personally, I suggested you go to 3.0 to test to see if the problems you were 
having can from a broken QGIS installation.  The fact that the project did open 
in an older version of QGIS does indicate that this was the case.  As 3.0 can 
live without affecting 2.x so that looked like a good testing option.  Seeing 
you don’t enjoy playing around much with you versions, going for the latest LTR 
2.18 looks like the better option.  If you do that, I would recommend you 
completely uninstall both versions of QGIS on your compter as bugs found in 
setting could be passed along the latest 2.18 version.  Do this when you have 
time.

 If you move to 3 this is not an issues. You should have a fresh install. I 
would wait the 10 days as suggested below and go to 3.2.

The only real reason not to migrate to 3.2 is If you have a number of specific 
plugins you absolutely need.  Some are not yet ported to QGIS 3. I could check 
for you if you send a list of your installed plugins.  Also, some gdal tool 
have missing parameters or options in 3.0. This may fixed in 3.2.  If you don’t 
know what I am talking about, or if you use gdal outside of QGIS, this is not 
an issus.

> 3.0 is end of life in 10 days, meaning that while you can still use it (like 
> you do with 2.10), it won't get bug fixes anymore (and few months later, we 
> would fall in the same issue).  3.2 will be released at that moment for 4 
> months, with new features but also probably new bugs. On the other hand 2.18 
> is there up to january 2019, had got a lot of fixes since almost two years 
> and much much stable.
> And I still think that migrating from a so old 2.x release to 3.x might not 
> be a good idea but I don't have technical skills to confirm or argument this 
> feeling.
> If your need is to "simply" use QGIS and you don't want to regularly update, 
> I'd say "Just go with LTRs". This is what they are designed for. You'll miss 
> some features but will get them (stabler) once  the new LTR is released.
> 
> Regards,
> Harrissou
>> I see that Nicholas makes a good case for osgeo4w.
This install will give you options to install all GIS desktop packages an easy 
way.  Start with that. All the needed software will be installed but you will 
not have the options to select 2.x or 3.x.  You will be in 3.x.  Then run the 
install with the advanced option and have a look at how it works.  There, you 
could select extra software or packages.  If you are super nervous, install 
Teamviewer (google it) and I could help with the installation from my home.  I 
am on Montreal time.

>> Good advice about backing up data, which I generally do but not always as 
>> frequently as I should.  I do appreciate learning experiences but would 
>> prefer to choose those which are the more satisfying.  With my advancing 
>> years and very   full days, I try to pick experiences which advance 
>> my cause rather than just overcome bugs.  However, there is always value in 
>> learning.
>> Yes, I do appreciate the community support and find many problems are also 
>> dealt 

Re: [Qgis-user] Unable to set the frame in the composer properly to make the coordinates appear in QGIS 3.0.1

[Nicolas Cadieux]

Hi,
Could it be a different CRS?  If you are expecting meters but the CRS is in 
degrees, you will have to zoom out a lot to see the one degree coordinates...
Just an idea
Nicolas

> Le 9 juin 2018 à 14:40, Pavlo Ro  a écrit :
> 
> Dear everyone,
> 
> I have had a problem regarding the frame in the composer. I cannot make the 
> coordinates appear. I activate the frame, I check the box that says something 
> like "visualise coordinates", and neither the inner, outer marks, the 
> crosses, or the coordinates appear in the frame of the map (I'm using just 
> one map in the composer, so there is no possible mistake regarding different 
> maps views). 
> 
> I checked every possibility in the frame options, even trying very different 
> values in the boxes which allow to change the values of the units (at least I 
> think so), and I'm using WGS84 as CRS. This problem seems really odd to me, 
> because I could manage to do that easily in QGIS 2.18.
> 
> Could anyone guide me through this issue, or brainstorm some ideas about what 
> could I be doing wrong?
> 
> Thanks in advance!
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Re: [Qgis-user] Unable to load project

[Nicolas Cadieux]

Hi,
Answers below

> Le 9 juin 2018 à 02:06, Springfield Harrison  a écrit :
> 
> Hello Responders,
> 
> Thanks very much for your suggestions and comments.  Very helpful.
> 
> I must say though that the last few comments have again underscored my 
> nervousness about changing anything that isn't completely broken.

Ok but are having problems so things are broken.
> 
> Firstly, why are there two installation processes and what is the purpose of 
> each?  This implies making a choice after learning about the benefits and 
> disadvantages of each.  What are the criteria for choosing one over the 
> other?  How long is the process of understanding the options?

There is the easy install and the OSGEO instal.  The latest will give you more 
choices, like installing many versions or additional packages.  You can also 
simply ask it to install all desktop package without having to ask yourself to 
many questions.  The only disadvantage is that it does not really provide a 
good mechanism for  uninstalling Qgis. You sometimes need to do it manually 
when things get complicated.  That is my preferred install method.  I think the 
easier Qgis install has a complete remove option usually found in windows.
> 
> Secondly, there seems to be no great consensus over the possibility (or not) 
> of conflicts between simultaneous installations.  Again, this makes me 
> nervous.

According to the Anita Grazer link I sent you, 2 and 3 store the settling and 
plugins in different places.  Anita is my guru.  If she said it was safe... it 
is safe!  But I also tried it and what she said is correct.  2 and 3 live 
together and do not interact but yes, the problem is real in many cases, just 
not this time.
> 
> Thirdly, why are some operators running two or three simultaneous 
> installations?  Does this mean that the latest version is not adequate for 
> some tasks?

Some  installs are  for stable long term support (LTS).  Some are under 
development (DEV). Qgis3,0 is what they call early adopters (so it is more 
likely to have bug but they have all the latest bling).  The nightly builds are 
version containing the most resent fixes.  Generally speaking, I go with the 
LTS at work and other versions at home.
> 
> All these things give me pause and discourage me from wading in to something 
> that may have a lengthy learning curve and an unpredictable outcome.  In this 
> case, the devil you know definitely seems to be a worthy rule of thumb.  At 
> least, until it fails utterly.

Fix problems when you have time.  Plan for extra time.   Backup you data 
regularly so if shit hits the fan... you have a copy of all your files.  This 
is just common good sense computer user practice. Consider the problems you 
create and solve as a learning experience and not an obstacle.  Things get much 
less stressful if you know that you can only loose time and not your important 
data.  
> 
> In that regard, I discovered that at some point I had installed 2.8.1 and, 
> remarkably, it would load my ostensibly corrupt configuration file.  I appear 
> to be back in business.

Therefore your Qgis 2.10 is probably at fault and a update will more likely 
give you a more stable environment with better and newer features. Remember 
that opening a Qgis project from a higher version to a Lower version can lead 
to problems so make sure you add the Qgis version in the name of the file.
> 
> However, this version still bogs down upon loading the various layers but 
> does not fail after the delay.  There are about 100 layers, mostly vector.

Things have probably improved since...  that is why and upgrade is justified. 

> 
> Anyway, not sure if this is particularly helpful but is my current thinking 
> on the upgrading process.

Well we see that this is not easy for you.  I sometimes feel the same sitting 
in front of a Mac where my reflexes are not as sharp as with windows.  Again, 
do it if when you have the time, consider this as a learning experience and not 
an obstacle.  Backup your data when doing something you are not sure of and use 
community support.
> 
> Thank you all again for your assistance…
> 
> Cheers . . . . . Spring Harrison
> 
> 
> 
>> On 08-Jun-2018 06:25, DelazJ wrote:
>> Hi,
>> 
>> Years that I'm using the osgeo4w installer (advanced install) with three 
>> concurrent releases  minimum (ltr, current release, dev, and sometimes 
>> ltr-dev) and I can't recall on any issue I got due to this situation.
>> And afaics there's nothing to be particularly careful of, it's just about 
>> click click click process and all got installed in the c:\osgeo4w64 folder.
>> 
>> Just wanted to share my experience.
>> 
>> Regards,
>> Harrissou
>> 
>> 
>> 2018-06-08 13:49 GMT+02:00 Philip Barlow :
>>> AFAIK if you install QGIS with the standalone installer that just puts the 
>>> application and everything it needs into a folder in program files. You may 
>>> encounter issues if you installed multiple versions with the osgeo4w 
>>> installer if you 

Re: [Qgis-user] Plugin PolygonComplexity

[Nicolas Cadieux]

Translation,
The PolygonComplexity need and old version of ftools.  I indicated it would 
probably work in Qgis 2.14.  Does anybody know if ftools can be installed in 
2.18? Is there a ftool dll out there that could make this plugin work?
Nicolas

> Le 8 juin 2018 à 10:39, Soungalo Dembele  a écrit :
> 
> Bonjour, 
> 
> Au fait, je cherche dans Qgis un plugin qui permet de caractériser les formes 
> des polygones et sur le net j'ai vu "polygonComplexity" sauf que quand j'ai 
> essayé de l'installer, il y a ce message qui apparaît (cf. ci joint).
> 
> Sinon il y a d'autres plugins qui me permettront de caractériser les formes 
> des polygones (carré, rectangle...).
> 
> En vous remerciant.
> 
> DEMBELE soungalo
> 
> Etudiant en Géomatique.
> 
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Re: [Qgis-user] Converting X Y Coordinates to Latitude/Longitude

[Nicolas Cadieux]

Hi David,

I’am an archaeologist working in Québec. If you vectorized the map in a local 
CRS, all you need to do is do a « save as » and change the CRS (coordinate 
reference system) that is in Longitude Latitude.  If your map is not 
georefenrenced (that is, you just scanned the map and did not use a CRS, that 
is more complicated but not impossible.  I usually fixe that do in a CAD but I 
am sure you can do it in QGIS.  We could talk if you want and I could help you 
out figured the next steps and steps to avoid this problem (like georefereing 
the raster map before you start) .Send me an email directly.

You could look at this also.
https://gis.stackexchange.com/questions/136817/qgis-moving-the-layer-all-features-using-vector-affine-transformation

Nicolas

> Le 7 juin 2018 à 20:49, David Hochfelder  a écrit :
> 
> Hi All,
> 
> I am new to QGIS, so this may be a newbie question easily answered by the 
> more experienced.
> 
> I'm working on a historical GIS project to remap an area of Albany, NY 
> demolished for urban renewal in 1962. I've succeeded in vectorizing a 
> historic map of the area (~1960), but the coordinates are not in lat/long 
> form. I see that there are plugins for converting tables of specific 
> coordinates, but I want to convert the entire map continuously. 
> 
> This area no longer exists--all the buildings and streets were cleared for 
> the Empire State Plaza state capitol complex.
> 
> My end goal is to use the rectified map as a way to geotag historic 
> photographs of particular buildings.
> 
> Is there a way to convert the coordinates in a continuous fashion for the 
> entire region?
> 
> Thanks for your help.
> 
> Dave Hochfelder
> 
> 
> David Hochfelder
> Associate Professor
> History Department
> Social Science 060B
> University at Albany, SUNY
> Albany, NY 1
> 518-442-5348
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Re: [Qgis-user] Coordinate Conversion

[Nicolas Cadieux]

Hi,

I am not sure about v.transforme but GDA94 is handled in QGIS. I imagine that 
this is not the case with the local projection and that you are trying to find 
the transformation?  Usually, my way to deal with this is to contact the local 
governments.  They normally have software to convert local grids when these are 
not widely used.  If you have the epgs code, you could download the grid 
parameters and create a custom projection using the proj4 parameters.

http://spatialreference.org/ref/epsg/

Nicolas


> Le 7 juin 2018 à 00:36, Grant Boxer  a écrit :
> 
> I have local grid coordinates (no projection) and I want to convert it into 
> real world (GDA94 z 50) UTM coordinates. I have 4 points with both local and 
> real world coordinates. I have looked at using v.transform but I need a way 
> to calculate the parameters for the transform. Any suggestions where/how I 
> can do this?
>  
> Grant Boxer
> Perth, Western Australia
>  
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Re: [Qgis-user] Importing Layers from .dxf to .kml

[Nicolas Cadieux]

Hi,
You could create and save a style based on the attributes.
https://gis.stackexchange.com/questions/20404/assign-multiple-colors-to-features-within-a-single-vector-layer

I am surprised that Qgis can use the styles found in the dxf.
Nicolas 

> Le 5 juin 2018 à 06:37, Pedro Amaro (Infratec)  a 
> écrit :
> 
> Hello.
>  
> I am trying to create a .kml file with the information contained in a .dxf 
> file.
>  
> I already can upload the .dxf file to QGIS and keep the dxf’s layers’ 
> information. Also, QGIS presents the .dxf drawing with its original colours.
>  
> I also can create the corresponding .kml file. The problem is that this .kml 
> file presents every element with one colour only. I can select manually 
> different colours for different .dxf’s layers, but usually I have dozens of 
> layers and doing so manually takes a really long time. Is there anyway I can 
> create the .kml file keeping the .dxf’s colours, as QGIS presents? I do not 
> know if it is useful, but I have an attribute that has the RGB colour.
>  
> Thanks!
>  
> Com os melhores cumprimentos | Best regards | Saludos cordiales
>  
> Pedro Amaro
> 
> 
>   
> Este e-mail foi verificado em termos de vírus pelo software antivírus Avast. 
> www.avast.com
> 
> 
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Re: [Qgis-user] layers shift when exporting from composer to jpg

[Nicolas Cadieux]

Hi,

I had this problem with openlayer plugin before when I zoomed in to much and 
then printed.  I use QuickMapServices plugin now that does not do that.  Using 
a wms should fix the problem also.

Nicolas

> Le 30 mai 2018 à 06:37, Martin Fisher  a écrit 
> :
> 
> I do not know why you have encountered this problem, but perhaps you could 
> try and alternative approach, depending on what you could like on the 
> background. The obvious choice may be to use an ESRI map service from 
> http://server.arcgisonline.com/arcgis/rest/services, as a WMS layer.
> 
> Best of luck
> 
> 
> On May 28 2018, at 3:57 pm, MIKE MCGRADY  wrote:
> 
> 
> 
> I wanted to make a quick map using composer using a google hybrid map as 
> background.  Everything looked fine in the preview, but when I looked at the 
> jpg, the data were no longer in the right space, having shifted some few km 
> to the west.  I am using QGIS 2.8.3 Wien.  Am I missing something?  Any work 
> around?
>  
> I am not very experienced with QGIS, so simple instructions work best (in all 
> things)  
> 
> 
> 
> M. J. McGrady
> Am Rosenhugel 59
> A-3500 Krems
> Austria
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Re: [Qgis-user] Preserving geometry when batching joins

[Nicolas Cadieux]

Hi,

It appears that the join attributes table found in the 2.18 processing 
joins tables but not like the "Joins" found in the layer property.  You 
are right, there is no option to save as a shp file! Only database 
formats.


Your best option is to use the field calculator in the point shp file 
and to create a new column with the geometries x and y. Then you can 
join the table and save as a csv.  Then, reimport the csv and use the x 
and y to recreate the points geometry.


OR

The problem is solved by using Qgis 3 where you can save as a .shp.

Nicolas




On 2018-05-28 1:44 PM, Samuel Williams wrote:

Hi Nicolas,

Thanks! Here are two matching files - I would be interested to know if 
it gives you other options.


https://drive.google.com/open?id=1bM6qGYaNmm93sEbwE4x4aoQSAZMtEIvH 
<https://link.getmailspring.com/link/1527529341.local-5ca47607-9dc5-v1.2.1-7e744...@getmailspring.com/0?redirect=https%3A%2F%2Fdrive.google.com%2Fopen%3Fid%3D1bM6qGYaNmm93sEbwE4x4aoQSAZMtEIvH=bmljb2xhcy5jYWRpZXV4QGFyY2hlb3RlYy5jYQ%3D%3D>

Let me know if you need anything else.

Sam

On May 28 2018, at 4:15 pm, Nicolas Cadieux 
 wrote:




Hi,

Can you send me a sample of the files?  I have more options on my
computer but is may be that I am not testing with a .csv.

Nicolas

On 2018-05-28 6:35 AM, Samuel Williams wrote:


Bonjour Nicolas,

Thanks for taking the time to answer my email.
Unfortunately the only options that I have for saving the
joined files are all table based - see the screenshot that I
have uploaded here:


https://drive.google.com/file/d/1x0ADTag8xk85Ty3Vx6Wyb0FQCXfKDyBQ/view?usp=sharing

<https://link.getmailspring.com/link/1527529341.local-5ca47607-9dc5-v1.2.1-7e744...@getmailspring.com/1?redirect=https%3A%2F%2Flink.getmailspring.com%2Flink%2F1527503634.local-c54bfe18-f86f-v1.2.1-7e7447b6%40getmailspring.com%2F0%3Fredirect%3Dhttps%253A%252F%252Fdrive.google.com%252Ffile%252Fd%252F1x0ADTag8xk85Ty3Vx6Wyb0FQCXfKDyBQ%252Fview%253Fusp%253Dsharing%26recipient%3Dbmljb2xhcy5jYWRpZXV4QGFyY2hlb3RlYy5jYQ%253D%253D=bmljb2xhcy5jYWRpZXV4QGFyY2hlb3RlYy5jYQ%3D%3D>

If I do the joins one by one, then yes it is easy to save the
point dataset as a shapefile after it has been joined with the
csv file, but I can't find a way of doing this in batch mode.

Any suggestions?

Thanks,

Sam





On May 28 2018, at 2:16 am, Nicolas Cadieux


<https://link.getmailspring.com/link/1527529341.local-5ca47607-9dc5-v1.2.1-7e744...@getmailspring.com/2?redirect=mailto%3Anicolas.cadieux%40archeotec.ca=bmljb2xhcy5jYWRpZXV4QGFyY2hlb3RlYy5jYQ%3D%3D>
wrote:


Hi,
Once you have joined the geometry file to the matching
attribute file, you should be able to save that as a shape
file.  If you can’t figure it out, put a sample on the
next email.
Nicolas

Le 27 mai 2018 à 17:10, Samuel Williams
https://link.getmailspring.com/link/1527529341.local-5ca47607-9dc5-v1.2.1-7e744...@getmailspring.com/3?redirect=https%3A%2F%2Flink.getmailspring.com%2Flink%2F1527503634.local-c54bfe18-f86f-v1.2.1-7e7447b6%40getmailspring.com%2F1%3Fredirect%3Dmailto%253Asam.williams%2540sineenvironmental.com%26recipient%3Dbmljb2xhcy5jYWRpZXV4QGFyY2hlb3RlYy5jYQ%253D%253D=bmljb2xhcy5jYWRpZXV4QGFyY2hlb3RlYy5jYQ%3D%3D>>
a écrit :

Hello,

I've hit a issue in Qgis that I'm struggling to
resolve, and I'm hoping that someone might be able to
point me in the right direction.

I have 12 point geometry data sets and 12 csv files.
Each csv file contain the attributes for one of the
point data sets - there are exactly the same number of
records in each point / csv pair:

Points1.shp:
-- point 1 UID
-- point 2 UID
..
-- point 980 UID

Attributes1.csv:
-- record 1 (Point 1 UID, blah, blah, whatever)
-- record 2 (Point 2 UID, blah, blah, whatever)
...
-- record 980 (Point 980 UID, blah, blah, whatever)

I've loaded them all into Qgis and was hoping that I
could join them as a batch process, so that I end up
with 12 point geometry shapefiles, with each point
associated with the equivalent record from the
matching csv file I've had some success, in that
the batch interface to join allows me to list the
input layers, fields for the joins and the output file
names very easily, but I can't work out how to
preserve the geometry of the points. The only file
 

Re: [Qgis-user] hide vector under raster?

[Nicolas Cadieux]

Hi,

If you are having crashes, try on 2.18 to see if you have the same problem.  
Are you using on the fly reprojection?  If your vector file is not in the same 
format as the raster, the reprojection is probably taking all the time.  Try 
saving in an other format like spatialite that is more efficient than shp.  
Copy the file on a local disk and not a file server.  Make a new project with 
only the raster and the vector files to make try and isolate the crash problem. 
 Disable all plugins.

Perhaps the control rendering order in the layer order panel can help?  Not 
sure, I don’t use that.

Nicolas

> Le 29 mai 2018 à 09:00, Tobias Wendorff  a 
> écrit :
> 
> Hi Bernhard,
> 
> Am Di, 29.05.2018, 14:42 schrieb Bernhard Ströbl:
>> 1) You have a vector layer with _many_ features
> 
> Exactly.
> 
>> 2) You do not want to have it rendered because it takes so long to render
> 
> Exactly.
> 
>> 3) You want to query this layer
> 
> Exactly.
> 
>> 4) When you zoom out QGIS crashes when using the no symbols renderer
> 
> Actually, it doesn't crash because of no symbols renderer. It just
> takes so long to load the vector data that QGIS doesn't respond
> anymore. When I click somewhere into QGIS after 10-15 minutes, Windows
> told me that the app crashed and that I have to restart it.
> 
>> Questions: What kind of layer is this: DataProvider? geometryType?
> 
> 24 shapefiles, polygon grid with 100 x 100 meters
> 
>> Which version of QGIS are you using?
> 
> QGIS3 (tested stable release and nightly)
> 
>> Does QGIS crash when zooming out while you use a simple renderer?
> 
> Same behavior: it doesn't respond after some minutes.
> There's no difference between no symbols and simple renderer.
> 
> Best,
> Tobias
> 
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Re: [Qgis-user] Preserving geometry when batching joins

[Nicolas Cadieux]

Hi,

Can you send me a sample of the files?  I have more options on my 
computer but is may be that I am not testing with a .csv.


Nicolas


On 2018-05-28 6:35 AM, Samuel Williams wrote:

Bonjour Nicolas,

Thanks for taking the time to answer my email.
Unfortunately the only options that I have for saving the joined files 
are all table based - see the screenshot that I have uploaded here:


https://drive.google.com/file/d/1x0ADTag8xk85Ty3Vx6Wyb0FQCXfKDyBQ/view?usp=sharing 
<https://link.getmailspring.com/link/1527503634.local-c54bfe18-f86f-v1.2.1-7e744...@getmailspring.com/0?redirect=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F1x0ADTag8xk85Ty3Vx6Wyb0FQCXfKDyBQ%2Fview%3Fusp%3Dsharing=bmljb2xhcy5jYWRpZXV4QGFyY2hlb3RlYy5jYQ%3D%3D>


If I do the joins one by one, then yes it is easy to save the point 
dataset as a shapefile after it has been joined with the csv file, but 
I can't find a way of doing this in batch mode.


Any suggestions?

Thanks,

Sam





On May 28 2018, at 2:16 am, Nicolas Cadieux 
<nicolas.cadi...@archeotec.ca> wrote:



Hi,
Once you have joined the geometry file to the matching attribute
file, you should be able to save that as a shape file.  If you
can’t figure it out, put a sample on the next email.
Nicolas

Le 27 mai 2018 à 17:10, Samuel Williams
<sam.willi...@sineenvironmental.com

<https://link.getmailspring.com/link/1527503634.local-c54bfe18-f86f-v1.2.1-7e744...@getmailspring.com/1?redirect=mailto%3Asam.williams%40sineenvironmental.com=bmljb2xhcy5jYWRpZXV4QGFyY2hlb3RlYy5jYQ%3D%3D>>
a écrit :

Hello,

I've hit a issue in Qgis that I'm struggling to resolve, and
I'm hoping that someone might be able to point me in the right
direction.

I have 12 point geometry data sets and 12 csv files. Each csv
file contain the attributes for one of the point data sets -
there are exactly the same number of records in each point /
csv pair:

Points1.shp:
-- point 1 UID
-- point 2 UID
..
-- point 980 UID

Attributes1.csv:
-- record 1 (Point 1 UID, blah, blah, whatever)
-- record 2 (Point 2 UID, blah, blah, whatever)
...
-- record 980 (Point 980 UID, blah, blah, whatever)

I've loaded them all into Qgis and was hoping that I could
join them as a batch process, so that I end up with 12 point
geometry shapefiles, with each point associated with the
equivalent record from the matching csv file I've had some
success, in that the batch interface to join allows me to list
the input layers, fields for the joins and the output file
names very easily, but I can't work out how to preserve the
geometry of the points. The only file type listed that I can
save are DBF / XLSX / CSV / ODS files, which will only
preserve the joined tables not the geometry.

Am I approaching this whole problem in the wrong way, or is
there something very obvious that I've missed?

I'm using:

QGIS version



2.18.17



QGIS code branch



Release 2.18

<https://link.getmailspring.com/link/1527503634.local-c54bfe18-f86f-v1.2.1-7e744...@getmailspring.com/2?redirect=https%3A%2F%2Flink.getmailspring.com%2Flink%2F1527454204.local-f62ddf4d-2b7e-v1.2.1-7e7447b6%40getmailspring.com%2F0%3Fredirect%3Dhttps%253A%252F%252Fgithub.com%252Fqgis%252FQGIS%252Ftree%252Frelease-2_18%26recipient%3DcWdpcy11c2VyQGxpc3RzLm9zZ2VvLm9yZw%253D%253D=bmljb2xhcy5jYWRpZXV4QGFyY2hlb3RlYy5jYQ%3D%3D>

Compiled against Qt



4.8.7



Running against Qt



4.8.7

Compiled against GDAL/OGR



2.2.3



Running against GDAL/OGR



2.2.3

Compiled against GEOS



3.6.2-CAPI-1.10.2



Running against GEOS



3.6.2-CAPI-1.10.2 4d2925d6

PostgreSQL Client Version



10.2 (Ubuntu 10.2-1)



SpatiaLite Version



4.3.0a

QWT Version



6.1.3



PROJ.4 Version



493

QScintilla2 Version



2.10.2




This particular workstation is running Ubuntu 18.04 on amd64
hardware.

Any suggestions welcomed - I know that for just 12 data sets I
could probably have done the joins manually in the time it has
taken to type this out, but I'm really curious as to whether
there is a better way.

Cheers,

Sam

Open Tracking

___

Re: [Qgis-user] Preserving geometry when batching joins

[Nicolas Cadieux]

Hi,
Once you have joined the geometry file to the matching attribute file, you 
should be able to save that as a shape file.  If you can’t figure it out, put a 
sample on the next email.
Nicolas

> Le 27 mai 2018 à 17:10, Samuel Williams  
> a écrit :
> 
> Hello,
> 
> I've hit a issue in Qgis that I'm struggling to resolve, and I'm hoping that 
> someone might be able to point me in the right direction.
> 
> I have 12 point geometry data sets and 12 csv files. Each csv file contain 
> the attributes for one of the point data sets - there are exactly the same 
> number of records in each point / csv pair:
> 
> Points1.shp:
> -- point 1 UID
> -- point 2 UID
> ..
> -- point 980 UID
> 
> Attributes1.csv:
> -- record 1 (Point 1 UID, blah, blah, whatever)
> -- record 2 (Point 2 UID, blah, blah, whatever)
> ...
> -- record 980 (Point 980 UID, blah, blah, whatever)
> 
> I've loaded them all into Qgis and was hoping that I could join them as a 
> batch process, so that I end up with 12 point geometry shapefiles, with each 
> point associated with the equivalent record from the matching csv file 
> I've had some success, in that the batch interface to join allows me to list 
> the input layers, fields for the joins and the output file names very easily, 
> but I can't work out how to preserve the geometry of the points. The only 
> file type listed that I can save are DBF / XLSX / CSV / ODS files, which will 
> only preserve the joined tables not the geometry.
> 
> Am I approaching this whole problem in the wrong way, or is there something 
> very obvious that I've missed?
> 
> I'm using:
> QGIS version
> 2.18.17
> QGIS code branch
> Release 2.18
> Compiled against Qt
> 4.8.7
> Running against Qt
> 4.8.7
> Compiled against GDAL/OGR
> 2.2.3
> Running against GDAL/OGR
> 2.2.3
> Compiled against GEOS
> 3.6.2-CAPI-1.10.2
> Running against GEOS
> 3.6.2-CAPI-1.10.2 4d2925d6
> PostgreSQL Client Version
> 10.2 (Ubuntu 10.2-1)
> SpatiaLite Version
> 4.3.0a
> QWT Version
> 6.1.3
> PROJ.4 Version
> 493
> QScintilla2 Version
> 2.10.2
> This particular workstation is running Ubuntu 18.04 on amd64 hardware.
> 
> Any suggestions welcomed - I know that for just 12 data sets I could probably 
> have done the joins manually in the time it has taken to type this out, but 
> I'm really curious as to whether there is a better way.
> 
> Cheers,
> 
> Sam
> 
> 
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Re: [Qgis-user] QGIS UTM projection of longitudes > 180 degrees

[Nicolas Cadieux]

Hi,
When experiencing this kind of difficulty, I normally just save the files in 
the desired projection.  On the fly will have difficulties when crossing 
“projection limites”.  Keep in mind that reprojecting data will change the 
values so keep a back up of the original data.
Nicolas

> Le 26 mai 2018 à 10:36, Eric Fielding  a écrit :
> 
> I have some geophysical data (subducting slab depth) that is stored in NetCDF 
> raster format (from this download site 
> https://earthquake.usgs.gov/data/slab/models.php). I am working with the file 
> that is for Mexico and Central America in a regular WGS84 longitude-latitude 
> grid (CRS EPSG:4326), and it has the longitudes all as positive numbers, i.e. 
> from 254 to 279 degrees. When I load this in QGIS and plot it in the original 
> EPSG:4326 projection, it plots in the positive longitude as expected. When I 
> try to use the on-the-fly CRS transformation to plot the map in UTM zone 14 
> (EPSG:32614), the raster does not plot. I have other data in CRS 4326 (raster 
> and vector) that has negative longitudes and that plots in the UTM zone 14 
> map view. When I do plots with the Generic Mapping Tools (GMT) software, it 
> does not care whether the longitudes are negative or > 180 degrees. Do I need 
> to shift my gridded data to have the negative longitudes to work with it in 
> QGIS? 
> Sent from the QGIS - User mailing list archive at Nabble.com.
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Re: [Qgis-user] [Inquiry]: Loading thermal image in QGIS

[Nicolas Cadieux]

Hi,

I suggest you load the value tool plugin to get local pixel values.  I have no 
idea what image format you are using so I can’t help you much.  It would be 
nice to have a sample.  In the layer properties, you can select what bands to 
use.  Perhaps a you have band 123 for rGB and other bands for the thermal info?

File formats accepted by Qgis are those ( to my knowledge) accepted by gdal. 
http://www.gdal.org/formats_list.html

Nicolas

> Le 22 mai 2018 à 02:49, Eunice Renovalles  a écrit :
> 
> Good day!
> 
> I am a new to using QGIS 2.18.19 (I also have QGIS 3.0.3) and I use this 
> program for a project involving thermal image processing. My thermal images 
> were acquired using Flir Vue Pro R camera. My aim was to recolor the image 
> based on its temperature.
> 
> I initially tried loading the thermal image in QGIS; however, the 
> thermal/radiometric data was gone when I used Identify Features tool, and 
> instead showed the RGB value per pixel.
> 
> I would like to inquire if it is possible to process thermal image in QGIS 
> and how to retain the thermal data upon loading it in the software. I am able 
> to extract the csv file thermal data of the image if ever it is needed.
> 
> Your reply would be greatly appreciated.
> 
> Regards,
> Eunice
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Re: [Qgis-user] aux.xml files

[Nicolas Cadieux]

Hi world,

Ok I figured it out. As it turns out, the *aux.xml file is generated 
when the raster band does not contain the statistics data.  I first 
removed all this data using gdal_edit with the "-unsetstats" command.  
Then used the "-stats" command and voilà!!! no more pesky xml files for 
all files!


For some reason, using the -stats command only,  did not do the job as I 
had tried that before writing this email.  I first needed to -unsetstats 
before.


Cheers!

Nicolas


On 2018-05-21 12:13 AM, Nicolas Cadieux wrote:

Hi,

I am writing some scripts in python using gdal.  When reading .tif files to get 
the min max statistics, I sometimes get the creation of pesky *.aux.xml files 
and sometimes not?

What governs the creation of these files? Are they only created when the 
statistics are not included in the band metadata? Can a gdal-edit -stats fix 
the issue?

I know this is more of a gdal question then a Qgis question but some people in 
this group are very knowledgeable so I am taking my chances!

Thanks for the insight

Nicolas
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Re: [Qgis-user] interpolation help

[Nicolas Cadieux]

Hi,

I am not sure what you want to do?  We need more information. It would help if 
you put the files on a google drive so we can see them, if the information is 
not confidential.

 It would help if you indicated what you want to achieve.  Are you trying to 
get a 3D image with 100m pixels?  A sharper or smoother looking map? Or are you 
trying to just take the 15km grid resolution netcdf file and shop it up into 
smaller 100m pixels? Keep in mind that you can’t generate reliable 100m 
information by just changing the resolution of the 15 km file.  Even a nice 
interpolation of the 15 km data by using sampling point, will never give you 
reliable weather at a smaller 100m level. At best, you could create a nicer 
looking map containing rubbish information.  

Try to explain what is not working to that we can help you out.  If you are not 
comfortable in English, I speak French and Spanish also (but my knowledge of 
GIS Spanish words is null!)

Are both maps geofenced (one on top to the other) when you open them in Qgis? 
What is your ultimate goal?  What problem are you trying to solve?

Cheers!
Nicolas



> Le 21 mai 2018 à 04:41, meteo eventi  a écrit :
> 
> Thank you for you support.
> I'm preatty new with QGIS and even if I read the link sugested, I'm not able 
> to do it. Any other help?
> 
> 
> 
> 2018-05-09 13:11 GMT+02:00 Ujaval :
>> You can resample the raster to a specific resolution in QGIS. See
>> https://gis.stackexchange.com/questions/73046/how-to-resample-geotiff-images-to-the-same-resolution
>> 
>> -Ujaval
>> 
>>> On Wed, May 9, 2018 at 1:11 PM, meteo eventi  wrote:
>>> Hallo everyone,
>>> I'm new in QGIS and I'm trying to use the version 2.18 in order to produce 
>>> climatic maps.
>>> 
>>> I have two files:
>>> 1) a netcdf file containing on a 15 km resolution grid the fileds of  
>>> temperature and topography;
>>> 2) a 100 m resolution DEM
>>> 
>>> What I would like to do is to re-map the climatological temperature values 
>>> on the DEM interpolating the temperature field from the netcdf file to the 
>>> resolution of the DEM 
>>> 
>>> Is there a simple way to do it with QGIS?
>>> 
>>> Thank you very much for your kind help
>>> 
>>> 
>>> 
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> 
> 
> 
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[Qgis-user] aux.xml files

[Nicolas Cadieux]

Hi,

I am writing some scripts in python using gdal.  When reading .tif files to get 
the min max statistics, I sometimes get the creation of pesky *.aux.xml files 
and sometimes not?  

What governs the creation of these files? Are they only created when the 
statistics are not included in the band metadata? Can a gdal-edit -stats fix 
the issue?

I know this is more of a gdal question then a Qgis question but some people in 
this group are very knowledgeable so I am taking my chances!

Thanks for the insight

Nicolas
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Re: [Qgis-user] Problem georeferencing images in UTM

[Nicolas Cadieux]

Hi,

NAD27 does touch the northern part of South America but you are correct 
in saying that it does not extend in Brazil.  I wrote the comments when 
I was still trying to figure out where the maps were in the world.  I 
often get problems with NAD27 vs NAD83 grid in Canada as many maps have 
been printed with the errors in NAD27 military grid reference system.  
In those cases, error in much bigger than the standard 30 to 100 metres 
error so that was my working hypotheses.   People assume that adjoining 
maps use the same CRS and that is often not the case in remote areas.


I was reprojecting the Google map image to the local CRS in order to 
figure out the distortion and not using the  WGS 84 Pseudo Merc 
coordinates. It's important, like to say to know that there are 
differences between the web merc and the various  WGS 84 realizations.  
I would like to see the numbers out of curiosity if you have them. I 
often wonder why these projections were invented.


BTW, the problem was solved when we used the TPS transformation and not 
the linear transformation.


Cheers,

Nicolas



On 2018-05-18 3:52 PM, Nicolas Cadieux wrote:



Le 18 mai 2018 à 00:28, <list...@0x906.com <mailto:list...@0x906.com>> 
<list...@0x906.com <mailto:list...@0x906.com>> a écrit :


I haven't been able to open the dataset but going through the 
discussion I would like to offer some assistance since I believe 
there are some misconceptions here:


First, the data has nothing to do with the NAD27 / NAD83 datum's 
since these are North American datum's and they don't apply I believe 
in South America. Moreover, the separation between NAD27 to NAD83 is 
about 100m. I think Carlos mention something like being 400m off.


Another point of confusion is about the projection of Google Earth. 
Google is using a Web Mercator projection based on a perfect sphere. 
This has nothing to do with the UTM that has already incorporate the 
Earth Flattening values into the Northing and Easting equations.


If I find some time tomorrow, I will come back and give the proper 
equations showing the difference between Google's projection and UTM.


-0x906


On 2018-05-17 19:53, Carlos Henrique Grohmann de Carvalho wrote:


Thanks for the input Nicolas
These are official maps so the utm grid is ok. I figured that I was 
using a linear transformation, with the option to just create the 
world file, which works for control points at the corners 
(lat/long), since the boundaries of the map is defined by 
latitude/longitude. With UTM, this simple transformation won't work, 
but TPS will give the correct results.

Carlos

On Thu, May 17, 2018 at 7:28 PM, Nicolas Cadieux 
<nicolas.cadi...@archeotec.ca <mailto:nicolas.cadi...@archeotec.ca>> 
wrote:


Hi,
The utm grid is way off or we have the wrong epsg code.  If you
geofence using 2 points (linear algo)  using a service like
google earth, you will see the distortion.  The long lat
coordinate are probably ok but I did not test them.
You can either use the long lat or use more points.  With 4
points and using the thin plate spline, I got good results.
Nicolas

Le 17 mai 2018 à 12:42, Carlos Henrique Grohmann de Carvalho
<carlos.grohm...@gmail.com <mailto:carlos.grohm...@gmail.com>> a
écrit :


Thanks Nicolas, but the misalignment still persists. OTF is
off, project has same CRS as data (epsg 29192). There is a
~400m difference in the N-S direction.
    Carlos

On Thu, May 17, 2018 at 1:28 PM, Nicolas Cadieux
<nicolas.cadi...@archeotec.ca
<mailto:nicolas.cadi...@archeotec.ca>> wrote:

Hi,
Disable projection on the fly.  Make sure the project is in
the same CRS as your maps.
Nicolas

Le 17 mai 2018 à 12:14, Carlos Henrique Grohmann de
Carvalho <carlos.grohm...@gmail.com
<mailto:carlos.grohm...@gmail.com>> a écrit :


Hello all
I have two pngs of topographic maps from southeastern
Brazil (a zip file with images and points is available
here:
https://www.dropbox.com/s/mexeh4be46pgsk6/images_georef.zip?dl=0
<https://www.dropbox.com/s/mexeh4be46pgsk6/images_georef.zip?dl=0>)
I'm trying to georeference them, but with partial success
only. In this image
(https://www.dropbox.com/s/37xxqp4fkwpdyqh/utm_error.png?dl=0
<https://www.dropbox.com/s/37xxqp4fkwpdyqh/utm_error.png?dl=0>)
you can see that the X coordinate is fine, but the Y
coordinate of the two maps won't match.
Both maps use South American Datum 1969. I selected points
near the edges, and used the UTM values.
Interestingly, if I use Lat/Long, and place the points at
the corners, using decimal degrees, the maps align perfectly.
Any help is appreciated

-- 
Prof. Carlos Henrique Grohmann

Instit

Re: [Qgis-user] Problem georeferencing images in UTM

[Nicolas Cadieux]

> Le 18 mai 2018 à 00:28, <list...@0x906.com> <list...@0x906.com> a écrit :
> 
> I haven't been able to open the dataset but going through the discussion I 
> would like to offer some assistance since I believe there are some 
> misconceptions here:
> 
> First, the data has nothing to do with the NAD27 / NAD83 datum's since these 
> are North American datum's and they don't apply I believe in South America. 
> Moreover, the separation between NAD27 to NAD83 is about 100m. I think Carlos 
> mention something like being 400m off.
> 
> Another point of confusion is about the projection of Google Earth. Google is 
> using a Web Mercator projection based on a perfect sphere. This has nothing 
> to do with the UTM that has already incorporate the Earth Flattening values 
> into the Northing and Easting equations.
> 
> If I find some time tomorrow, I will come back and give the proper equations 
> showing the difference between Google's projection and UTM.
> 
> -0x906
> 
> 
> 
>> On 2018-05-17 19:53, Carlos Henrique Grohmann de Carvalho wrote:
>> 
>> Thanks for the input Nicolas
>>  
>> These are official maps so the utm grid is ok. I figured that I was using a 
>> linear transformation, with the option to just create the world file, which 
>> works for control points at the corners (lat/long), since the boundaries of 
>> the map is defined by latitude/longitude. With UTM, this simple 
>> transformation won't work, but TPS will give the correct results.
>>  
>> Carlos
>>  
>> 
>>> On Thu, May 17, 2018 at 7:28 PM, Nicolas Cadieux 
>>> <nicolas.cadi...@archeotec.ca> wrote:
>>>  
>>> Hi,
>>> The utm grid is way off or we have the wrong epsg code.  If you geofence 
>>> using 2 points (linear algo)  using a service like google earth, you will 
>>> see the distortion.  The long lat coordinate are probably ok but I did not 
>>> test them.
>>>  
>>> You can either use the long lat or use more points.  With 4 points and 
>>> using the thin plate spline, I got good results.
>>> Nicolas
>>> 
>>>> Le 17 mai 2018 à 12:42, Carlos Henrique Grohmann de Carvalho 
>>>> <carlos.grohm...@gmail.com> a écrit :
>>>> 
>>>> Thanks Nicolas, but the misalignment still persists. OTF is off, project 
>>>> has same CRS as data (epsg 29192). There is a ~400m difference in the N-S 
>>>> direction.
>>>>  
>>>> Carlos
>>>> 
>>>>> On Thu, May 17, 2018 at 1:28 PM, Nicolas Cadieux 
>>>>> <nicolas.cadi...@archeotec.ca> wrote:
>>>>>  
>>>>> Hi,
>>>>> Disable projection on the fly.  Make sure the project is in the same CRS 
>>>>> as your maps.
>>>>> Nicolas
>>>>> 
>>>>>> Le 17 mai 2018 à 12:14, Carlos Henrique Grohmann de Carvalho 
>>>>>> <carlos.grohm...@gmail.com> a écrit :
>>>>>> 
>>>>>> Hello all
>>>>>>  
>>>>>> I have two pngs of topographic maps from southeastern Brazil (a zip file 
>>>>>> with images and points is available here: 
>>>>>> https://www.dropbox.com/s/mexeh4be46pgsk6/images_georef.zip?dl=0)
>>>>>>  
>>>>>> I'm trying to georeference them, but with partial success only. In this 
>>>>>> image (https://www.dropbox.com/s/37xxqp4fkwpdyqh/utm_error.png?dl=0) you 
>>>>>> can see that the X coordinate is fine, but the Y coordinate of the two 
>>>>>> maps won't match.
>>>>>>  
>>>>>> Both maps use South American Datum 1969. I selected points near the 
>>>>>> edges, and used the UTM values. 
>>>>>>  
>>>>>> Interestingly, if I use Lat/Long, and place the points at the corners, 
>>>>>> using decimal degrees, the maps align perfectly.
>>>>>>  
>>>>>>  
>>>>>> Any help is appreciated
>>>>>> 
>>>>>>  
>>>>>> -- 
>>>>>> Prof. Carlos Henrique Grohmann
>>>>>> Institute of Energy and Environment - Univ. of São Paulo, Brazil
>>>>>> - Digital Terrain Analysis | GIS | Remote Sensing - 
>>>>>>  
>>>>>> http://carlosgrohmann.com
>>>>>> http://orcid.org/-0001-5073-5572
>>>>>> 
>>>>>> Can't stop the signa

Re: [Qgis-user] Problem georeferencing images in UTM

[Nicolas Cadieux]

Hi,
The utm grid is way off or we have the wrong epsg code.  If you geofence using 
2 points (linear algo)  using a service like google earth, you will see the 
distortion.  The long lat coordinate are probably ok but I did not test them.

You can either use the long lat or use more points.  With 4 points and using 
the thin plate spline, I got good results.
Nicolas

> Le 17 mai 2018 à 12:42, Carlos Henrique Grohmann de Carvalho 
> <carlos.grohm...@gmail.com> a écrit :
> 
> Thanks Nicolas, but the misalignment still persists. OTF is off, project has 
> same CRS as data (epsg 29192). There is a ~400m difference in the N-S 
> direction.
> 
> Carlos
> 
>> On Thu, May 17, 2018 at 1:28 PM, Nicolas Cadieux 
>> <nicolas.cadi...@archeotec.ca> wrote:
>> Hi,
>> Disable projection on the fly.  Make sure the project is in the same CRS as 
>> your maps.
>> Nicolas
>> 
>>> Le 17 mai 2018 à 12:14, Carlos Henrique Grohmann de Carvalho 
>>> <carlos.grohm...@gmail.com> a écrit :
>>> 
>>> Hello all
>>> 
>>> I have two pngs of topographic maps from southeastern Brazil (a zip file 
>>> with images and points is available here: 
>>> https://www.dropbox.com/s/mexeh4be46pgsk6/images_georef.zip?dl=0)
>>> 
>>> I'm trying to georeference them, but with partial success only. In this 
>>> image (https://www.dropbox.com/s/37xxqp4fkwpdyqh/utm_error.png?dl=0) you 
>>> can see that the X coordinate is fine, but the Y coordinate of the two maps 
>>> won't match.
>>> 
>>> Both maps use South American Datum 1969. I selected points near the edges, 
>>> and used the UTM values. 
>>> 
>>> Interestingly, if I use Lat/Long, and place the points at the corners, 
>>> using decimal degrees, the maps align perfectly.
>>> 
>>> 
>>> Any help is appreciated
>>> 
>>> 
>>> -- 
>>> Prof. Carlos Henrique Grohmann
>>> Institute of Energy and Environment - Univ. of São Paulo, Brazil
>>> - Digital Terrain Analysis | GIS | Remote Sensing - 
>>> 
>>> http://carlosgrohmann.com
>>> http://orcid.org/-0001-5073-5572
>>> 
>>> Can’t stop the signal.
>>> ___
>>> 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
> 
> 
> 
> -- 
> Prof. Carlos Henrique Grohmann
> Institute of Energy and Environment - Univ. of São Paulo, Brazil
> - Digital Terrain Analysis | GIS | Remote Sensing - 
> 
> http://carlosgrohmann.com
> http://orcid.org/-0001-5073-5572
> 
> Can’t stop the signal.
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Re: [Qgis-user] Problem georeferencing images in UTM

[Nicolas Cadieux]

Hi,

I am looking at your maps now. If I understand, it works with lat long but not 
the UTM Coordinates.  It could be a mistake in the utm grid.  Perhaps one utm 
grid is in NAD27 and the other in NAD83.  That could explain the shift.  
I will look at it.

Nicolas

> Le 17 mai 2018 à 12:42, Carlos Henrique Grohmann de Carvalho 
> <carlos.grohm...@gmail.com> a écrit :
> 
> Thanks Nicolas, but the misalignment still persists. OTF is off, project has 
> same CRS as data (epsg 29192). There is a ~400m difference in the N-S 
> direction.
> 
> Carlos
> 
>> On Thu, May 17, 2018 at 1:28 PM, Nicolas Cadieux 
>> <nicolas.cadi...@archeotec.ca> wrote:
>> Hi,
>> Disable projection on the fly.  Make sure the project is in the same CRS as 
>> your maps.
>> Nicolas
>> 
>>> Le 17 mai 2018 à 12:14, Carlos Henrique Grohmann de Carvalho 
>>> <carlos.grohm...@gmail.com> a écrit :
>>> 
>>> Hello all
>>> 
>>> I have two pngs of topographic maps from southeastern Brazil (a zip file 
>>> with images and points is available here: 
>>> https://www.dropbox.com/s/mexeh4be46pgsk6/images_georef.zip?dl=0)
>>> 
>>> I'm trying to georeference them, but with partial success only. In this 
>>> image (https://www.dropbox.com/s/37xxqp4fkwpdyqh/utm_error.png?dl=0) you 
>>> can see that the X coordinate is fine, but the Y coordinate of the two maps 
>>> won't match.
>>> 
>>> Both maps use South American Datum 1969. I selected points near the edges, 
>>> and used the UTM values. 
>>> 
>>> Interestingly, if I use Lat/Long, and place the points at the corners, 
>>> using decimal degrees, the maps align perfectly.
>>> 
>>> 
>>> Any help is appreciated
>>> 
>>> 
>>> -- 
>>> Prof. Carlos Henrique Grohmann
>>> Institute of Energy and Environment - Univ. of São Paulo, Brazil
>>> - Digital Terrain Analysis | GIS | Remote Sensing - 
>>> 
>>> http://carlosgrohmann.com
>>> http://orcid.org/-0001-5073-5572
>>> 
>>> Can’t stop the signal.
>>> ___
>>> 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
> 
> 
> 
> -- 
> Prof. Carlos Henrique Grohmann
> Institute of Energy and Environment - Univ. of São Paulo, Brazil
> - Digital Terrain Analysis | GIS | Remote Sensing - 
> 
> http://carlosgrohmann.com
> http://orcid.org/-0001-5073-5572
> 
> Can’t stop the signal.
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Re: [Qgis-user] Problem georeferencing images in UTM

[Nicolas Cadieux]

Hi,
Disable projection on the fly.  Make sure the project is in the same CRS as 
your maps.
Nicolas

> Le 17 mai 2018 à 12:14, Carlos Henrique Grohmann de Carvalho 
>  a écrit :
> 
> Hello all
> 
> I have two pngs of topographic maps from southeastern Brazil (a zip file with 
> images and points is available here: 
> https://www.dropbox.com/s/mexeh4be46pgsk6/images_georef.zip?dl=0)
> 
> I'm trying to georeference them, but with partial success only. In this image 
> (https://www.dropbox.com/s/37xxqp4fkwpdyqh/utm_error.png?dl=0) you can see 
> that the X coordinate is fine, but the Y coordinate of the two maps won't 
> match.
> 
> Both maps use South American Datum 1969. I selected points near the edges, 
> and used the UTM values. 
> 
> Interestingly, if I use Lat/Long, and place the points at the corners, using 
> decimal degrees, the maps align perfectly.
> 
> 
> Any help is appreciated
> 
> 
> -- 
> Prof. Carlos Henrique Grohmann
> Institute of Energy and Environment - Univ. of São Paulo, Brazil
> - Digital Terrain Analysis | GIS | Remote Sensing - 
> 
> http://carlosgrohmann.com
> http://orcid.org/-0001-5073-5572
> 
> Can’t stop the signal.
> ___
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> Qgis-user@lists.osgeo.org
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Re: [Qgis-user] Raster calculator questions

[Nicolas Cadieux]

Hi,

I am not sure of what you mean in the first part of the question but yes, you 
must create the output file to receive the output from the calculator.

As for the second part, QGIS currently has a big limitation with the raster 
calculator. I have been trying to get them to work on this for the past few 
years because I cannot use it for lidar data.  The problem is (as I understand 
it) that the rasters must all be loaded into memory in order to do the math.  
Before, QGIS just crashed.  Not, they have that message.  I can complain all I 
want but I am not able to be part of the solution (beginner coding skills) so I 
gave them rasters to test so they can figure out the problem.

I can only imagine that your rasters, once loaded into memory, are probably 
close to the max memory of your computer.  If you change the CRS, you probably 
add a new layer into the memory.  My guess is that you are therefore running 
out of memory.  Therefore you get the error.

I am only speculating.  The obvious step is to ask the coders to rework the 
QGIS raster calculator but that is complicated.  Ultimately, the new calculator 
would need to   be able to chop the problems in little bits, multiprocess the 
math, possibly offload the math to the GPU and be able to work without loading 
the files into memory.  For now, I use the gdal calculator but that has more 
limitations (same CRS, same pixel posting and extent... ) than the QGIS 
calculator but it can work with huge raster.

Nicolas

> Le 3 mai 2018 à 21:43, Chris House  a écrit :
> 
> When using raster calculator in QGIS 3 I  have to create a new raster first 
> to serve as the output. Is the intent of this to overwrite a input raster (I 
> haven't tried this) or something else? I'm confused by this. 
>  
> Secondly when I specify a CRS in raster calculator I get "insufficient memory 
> for this operation" error.  Using the default output CRS works. This usually 
> requires me to add a reprojection step on the output raster.
>  
> Windows 10
> Samsung SSD
> AMD 8 core processor
> 16 GB RAM
> NVIDIA Graphics Card 2GB RAM
>  
> Thanks
> --Chris
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Re: [Qgis-user] How to reference a map

[Nicolas Cadieux]

Maybe this

https://gis.stackexchange.com/questions/23622/citing-qgis-in-formal-publications
Or this
http://blog.apastyle.org/apastyle/2015/01/how-to-cite-software-in-apa-style.html

Ideally, you should figure out the exact style you need to use.

The year in 2014 https://fr.m.wikipedia.org/wiki/QGIS

Nicolas

> Le 29 avr. 2018 à 22:50, Kelly V  a écrit :
> 
> Hi,
> 
> I've used QGIS 2.4.0-Chugiak to create maps for my assignment.
> I would like to know what is the correct way to reference QGIS in-text and in 
> the bibliography.
> 
> I've looked it up a bit and I found that I'm supposed to use this:
> 
> QGIS Development Team (YEAR). QGIS Geographic Information System. Open Source 
> Geospatial Foundation Project. http://qgis.osgeo.org
> 
> I've no idea what year I'm supposed to put in the parenthesis for the version 
> I used and the link doesn't work for me. could someone please tell me in a 
> clear way how I'm supposed to do it?
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Re: [Qgis-user] Working with irregular magnetometry data points - converting them to an image

[Nicolas Cadieux]

Hi Calvin,

I see a lot of people have been corresponding.  I am an archaeologist and can 
help if you don’t figure thing out.  How many points are you looking at?  You 
could also use cloud compare to make a DEM.  I use Gdal grid with nearest 
neighbour for very big data sets.  

Nicolas


> Le 20 avr. 2018 à 11:42, C Hamilton  a écrit :
> 
> I don't know how many of you have worked with archaeological magnetormetry 
> data, but I have been asked to help with magnetometry data of the ancient 
> Mound Builders in North America. I am looking for some suggestion on how to 
> best turn the irregular magnetic data points into an image.
> 
> I see an Interpolation plugin that perhaps is the solution, but I also see 
> that it is not part of QGIS 3. Is this because it has not been ported yet, or 
> is not going to be porter, or is there a better solution?
> 
> I don't know if any of the Lidar tools would work for this or not. LASTools 
> is a commercial product and the locked version only works with small data 
> sets and adds noise unless you purchase a license. At least that is how it 
> was the last time I used it.
> 
> Thanks for any suggestions.
> 
> Calvin
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Re: [Qgis-user] QGIS Saving TAB as SHP

[Nicolas Cadieux]

Hi,
I would do a bug report https://trac.osgeo.org/gdal.  Have you tried fixing the 
geometry before exporting?  The problem could be in the tab file.  You could 
try to save in another format to see if the error is also reproduced.
Nicolas


> Le 19 avr. 2018 à 10:05, Richard McDonnell  a écrit 
> :
> 
> Afternoon all,
> I have a slight issue, there are a number of MapInfo Tab Files which we want 
> to convert to Shapefile, but they do not convert correctly.
> The issue arises with Rings/Holes in the Polygons, when you save the TAB file 
> as a shapefile, some of them are not displaying correct, they overlay the 
> hole as another polygon.
> The issue seems to be related to the direction the hole was 
> digitised/generated to. The issue can also be replicated outside of QGIS by 
> running ogr2ogr, so it seems to be a GDAL/OGR ESRI Shapefile Driver issue.
> Now in saying all that, QGIS 3 seems to be able to fix the issue by running, 
> Fix geometries  from the Processing Toolbox.
> My question is, Is there a way to fix the OGR Driver to fix the issue, or a 
> tick box under Save Vector Layer as... to run/implament the Fix geometries 
> tool as part of the save process?
> This is an issue, which pops up regularly online, with no solution to date.
> Regards & Thanks in advance.
> 
> Richard McDonnell
> 
> 
> 
> 
> Email Disclaimer: http://www.opw.ie/en/disclaimer/
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Re: [Qgis-user] Stastics/percentage raster layers

[Nicolas Cadieux]

Hi,

You can also use the "Saga Zonal raster statistics" found in processing.

Nicolas


On 2018-04-17 9:36 AM, Richard McDonnell wrote:

Hi Hanna,
The Link below, should help

https://gis.stackexchange.com/questions/83407/how-to-extract-pixel-value-counts-from-a-raster-in-qgis

Regards,

Richard.



On 17/04/2018 14:21, Hanna nengerman wrote:

Dear All,

I am using QGIS version: 2.8.2-Wien.

In my project I have multiple raster layers. With one of those raster layers I 
did the following calculation:
‘Raster layer’ = 0

This follows in a layer with 0 and 1 values. Where 0 stands for ‘false’ and 1 
stands for ‘true’.
My question is: if it is possible to get the statistics from the resulting 
layer.
I would also like to know if it is possible to get the amount of 0 or 1 values 
of that resulting layer, preferably the percentage.

I hope that someone can help me!

Kind regards,

Hanna
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--
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*OPW FRM Data Management*
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Re: [Qgis-user] How to open QGIS from another application?

[Nicolas Cadieux]

Hi,
You find how to do it on this page. 
https://docs.qgis.org/2.18/en/docs/user_manual/introduction/getting_started.html.
 See “command line options.”

Nicolas

> Le 9 avr. 2018 à 06:02,   a écrit :
> 
> Hi there
> Does anybody knows what's the prompt to open QGIS from anthoer application? 
> In the other application, a system to govern information about land 
> properties (parcels), I'd like to put a link, so when clicking on it, QGIS 
> opens and jumps to the corresponding parcel.
> Thanks and regards, Dani
>  
>  
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Re: [Qgis-user] Question on Georeferencer

[Nicolas Cadieux]

Hi,

Make sure your input file and the project have the proper CRS.  Do not use On 
the fly project projection.  That will help with the trouble shooting.  What 
version of QGIS are you working with?

Nicolas

> Le 19 mars 2018 à 15:15, Thomas WTS  a écrit :
> 
> Hi,
>  
> I’m trying to georeference a map using the georeferencer. The map is in the 
> USA, which has negative latitude values. When I georeference, the lat values 
> come out wrong as they convert the negative values into positive. Any tips on 
> how to use the georeferencer so as to avoid this problem?
>  
> My settings at the moment are as below.
>  
> 
>  
> Many thanks,
> Thomas
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Re: [Qgis-user] QGIS 3 initial settings from QGIS 2

[Nicolas Cadieux]

Hi,

According to this video by Nyall Dawson, the settings for Qgis 2 to 3 are not 
compatible.  https://youtu.be/TcZd1Y_ISi4.  You start with a clean slate.

Nicolas

> Le 28 févr. 2018 à 07:32, Jorge Gustavo Rocha  a écrit :
> 
> Hi,
> 
> Nathan did some work on that.
> Check the thread in this list: "Settings migration from QGIS 2 to 3"
> 
> Regards,
> 
> Jorge Gustavo
> 
>> On 28-02-2018 12:22, McDonaldR wrote:
>> Hello David
>> 
>> QGIS3 writes a new configuration into a .qgis3 folder in your user profile / 
>> home directory so all your old settings are in the old .qgis2 folder.  You 
>> might be able to copy contents from one to the other but I'm not sure of the 
>> consequences.  Proceed with caution :-)
>> 
>> Ross
>> 
>> 
>> Ross McDonald | GIS Data Coordinator | Angus Council, People, IT | Angus 
>> House, Orchardbank Business Park, Sylvie Way, Forfar DD8 1AT | t: 01307 
>> 476419
>> 
>> 
>> 
>> -Original Message-
>> From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of 
>> David Addy
>> Sent: 28 February 2018 08:46
>> To: qgis-user@lists.osgeo.org
>> Subject: [Qgis-user] QGIS 3 initial settings from QGIS 2
>> 
>> I was pleased to download QGIS3 last night, and I clicked on the option to 
>> include my existing settings from QGIS2.
>> However, when opening Q3 it seemed to be in the full naked default 
>> situation. There were no "Recent Projects" and my local CRS was not set to 
>> OSGB 36. The CRS is easily corrected of course, but is there any way to get 
>> back "Recent Projects" and whatever else I had previously set up in QGIS 2?
>> Any advice welcome.
>> Best wishes to all, and I can't wait to get into Q3 properly.
>> 
>> 
>> 
>> --
>> Sent from: http://osgeo-org.1560.x6.nabble.com/QGIS-User-f4125267.html
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>> please inform the sender and remove it from your system. If received in 
>> error you may not copy, print, forward or use it or any attachment in any 
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>> representation and does not represent the views of Angus Council. Emails may 
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> 
> J. Gustavo
> -- 
> Jorge Gustavo Rocha
> Departamento de Informática
> Universidade do Minho
> 4710-057 Braga
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> Fax: +351 253604471
> Móvel: +351 910333888
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Re: [Qgis-user] Free/Open Data Maps list

[Nicolas Cadieux]

Hi,

The Quickmap plugin is indeed full of data specially if you add the extra 
providers in the plugin settings.  Most importantly, it gives you an idea of 
who is giving what data. After that, you can find the original data (much more 
useful) from the provider.  I do the same thing with wms.  If you google ,for 
example, “wms Canada nrcan”, you will find many links to various servers 
providing wms layers.  After that, you can search for  the original data 
sources from these providers.  

It could also help if you specify the region you are working on.
Cheers!
Nicolas


> Le 27 févr. 2018 à 04:51, Albin Blaschka 
>  a écrit :
> 
> Am 27.02.2018 10:30, schrieb Idan Miara:
> 
>> Hi,
>>  
>> I'm looking for different maps (preferably global maps) to use as a 
>> background in QGIS 
>> (Topographic maps, Orthophoto, DTM etc).
>> Is there a list/plugin with a collection of free/open data maps that I can 
>> use?
>>  
>  
> For QGIS 2.x there is the Quickmapservices-Plugin for various Background 
> maps, as far as I know, it is not yet ported to QGIS 3
>  
> As far as DTMs are concerned, there are different websites, where you can 
> download such data (ASTER & Co.), a nice compilation is 
> http://viewfinderpanoramas.org/
>  
>  
> HTH,
> Albin
> 
> -- 
> | Dr.rer.nat. Albin Blaschka
> | Etrichstrasse 26, A-5020 Salzburg
> | * www.standortsanalyse.net *
> | * www.researchgate.net/profile/Albin_Blaschka *
> | - It's hard to live in the mountains, hard but not hopeless!
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Re: [Qgis-user] Can’t respond to the user list

[Nicolas Cadieux]

Hi,

Seems like the problem came from a nabble account created on Osgeo site to 
access the Qgis Québec user list.  Both  the nabble account and my subscription 
to the Qgis user list had the same email. Seems like I was receiving the Qgis 
user list messages via the nabble archive service and not via the actual list.  
I do not know how that actually happened and nothing was indicating me this was 
happening.  So I was writing to the list using my Qgis user list membership but 
receiving the replies via the nabble archive service.  Thanks Alexandre and 
Richard for your help.

Cheers!

Nicolas

> Le 14 févr. 2018 à 18:37, Alexandre Neto <senhor.n...@gmail.com> a écrit :
> 
> Could you be using some service to send your emails that don't match the 
> email address that you used to subscribe the list?
> 
> You probably will need the help of the list administrator to figure this out. 
> But I am not sure who that may be...
> 
> Nicolas Cadieux <nicolas.cadi...@archeotec.ca> escreveu no dia quarta, 
> 14/02/2018 às 14:54:
>> Hi,
>> 
>> I receive emails from this list and I can write question to the list but I 
>> canot answer to posts.  If I do, I receive a message saying I cannot post to 
>> the list!? I did send emails in the past to the list admin but the problem 
>> is persistent.  Does anyone have this problem and what could be the solution.
>> 
>> You will need to add your personal email if you want an answer from me.  
>> Like I say, all my responses will be blocked by the server.
>> 
>> Nicolas
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> -- 
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> -
> @AlexNetoGeo
> http://sigsemgrilhetas.wordpress.com
> http://gisunchained.wordpress.com
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[Qgis-user] Can’t respond to the user list

[Nicolas Cadieux]

Hi,

I receive emails from this list and I can write question to the list but I 
canot answer to posts.  If I do, I receive a message saying I cannot post to 
the list!? I did send emails in the past to the list admin but the problem is 
persistent.  Does anyone have this problem and what could be the solution. 

You will need to add your personal email if you want an answer from me.  Like I 
say, all my responses will be blocked by the server. 

Nicolas
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[Qgis-user] Zonal Statistics multiple classe

[Nicolas Cadieux]

Hi,

I have a raster (int16) with multiple class (ex 1 = grass, 2 = trees...) 
and a vector polygon file.  I want to have the zonal statistic (cum, 
min, max, sum...) for every class.  What is the best way to get this 
done in QGis 2.18.16 on Windows 10?


Thanks,

Nicolas

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[Qgis-user] Huge Raster calculator

[Nicolas Cadieux]

Hi,

Is anyone aware if the Qgis raster calculator will be able to deal with very 
large rasters in the near future? Any plans on implementing a fix soon?  If so, 
I can help in testing as I have multiple large raster sets ready to go.

For now, I am using gdal call but that is not very flexible when it comes so 
dealing with   rasters of different sizes and posting.
Cheers!

Nicolas
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Re: [Qgis-user] Georeferenced work won't write to file

[Nicolas Cadieux]

Did you specify the file name in a existing directory?
Nicolas

> Le 12 août 2017 à 10:00, Charles Barrows [via OSGeo.org] 
>  a écrit :
> 
> Georeferenced work won’t write to file
> 
>  
> 
> Cannot figure out what I’m doing wrong.  My georeferenced work on a raster 
> file contains 7 points in the GCP table.  The pixel/Easting/Northings  
> calculated with no trouble and filled the table.  The data points with labels 
> show up on the raster display.  Using Thin Plate Spline, which was the only 
> transform type that has worked for me before.  Resampling method Nearest 
> Neighbor.  Target SRS: (Kansas South)  Everything sets up, but after clicking 
> OK the modified.TIF file doesn’t show up anywhere on the disk drive.
> 
> Frustrated in Denver
> 
> 
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Re: [Qgis-user] Maximum number of layers

[Nicolas Cadieux]

Thanks for the info!

> Le 16 juil. 2017 à 16:19, dbnakuru [via OSGeo.org] 
> <ml+s1560n5328065...@n6.nabble.com> a écrit :
> 
> On 07/15/2017 01:50 PM, Nicolas Cadieux wrote: 
> > Hi, 
> > What is the maximum number of layers I can open in Qgis?  Is there a 
> > setting I can change to increase it? 
> I don't know about Windows but on Linux it's at least partially a 
> operating system setting.  That is the number of open files. 
> 
> In my case I wanted to open several thousand shapefiles (each shapefile 
> is actually 3-4 files). 
> 
> So in Linux there is a limit/ulimit command you can use to increase the 
> number of open file descriptors but it can only increase it up to the 
> hard limit.  To increase the hard limit I added a file to the system 
> directory which sets various limits in /etc/security/limits.d  I called 
> it 99-nofile.con in it I increased the hard limit to 65536.  Check 
> /etc/security/limits.conf for examples.  Then I rebooted now I've been 
> able to work with projects with thousands of shapefiles with no problem. 
> 
> I have lots of memory(128GB) which might be a factor as well. 
> > Thanks 
> > Nicolas 
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[Qgis-user] Maximum number of layers

[Nicolas Cadieux]

Hi,
What is the maximum number of layers I can open in Qgis?  Is there a setting I 
can change to increase it?
Thanks
Nicolas
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Re: [Qgis-user] Principal Component Analysis ?

[Nicolas Cadieux]

Hi, 
You can use R for PCA.
Use the R Commander package to add a GUI.  R can be scary at first.
Nicolas

> Le 23 juin 2017 à 11:03, image [via OSGeo.org] 
>  a écrit :
> 
> Good afternoon, 
> 
> i'm working on windows with several opensource tools (qgis, otb, grass...), 
> 
> I generated several OTB texture indices. Now, i want to evaluate the 
> information 's redundancy thanks to a Principal Component Analysis. 
> 
> => Is it possible to do that with some opensource tools (otb? qgis? grass?) 
> Moreover, I would like set a mask AND set a spectral subset (in order to 
> ignore some indices bands which seems "strange" and not relevant to introduce 
> into the process). 
> 
> Could you throw light for me? 
> 
> In advance, thank you very much for your help. 
> 
> Kind regards. 
> 
> If you reply to this email, your message will be added to the discussion 
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Re: [Qgis-user] import .csv issue with 2.18.8

[Nicolas Cadieux]

Hi,
Could be a bug in the csv file also.  Look at it using notepad++.  Does the 
file contain errors? 
Nicolas

> Le 25 mai 2017 à 16:20, Gianni Petino [via OSGeo.org] 
>  a écrit :
> 
> Hi all,
> I had a issue (QGis crashes) during the loading of a .csv file with QGis 
> 2.18.8 under ubuntu 17.04. Can it be a bug?
> Kind regards
> Gianni
> 
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Re: [Qgis-user] Magnetic declination

[Nicolas Cadieux]

https://www.youtube.com/watch?v=7TN3toqcyks



> Le 17 mai 2017 à 09:02, Tudorache, Marian [via OSGeo.org] 
>  a écrit :
> 
> Hi everyone, 
> 
> I have a map build in True Geographic North. 
> I have used the Magnetic Declination plugin build by Aldo Scorza, to 
> calculated magnetic declination on various points on the map. 
> I would like to know if there is a way to rotate the map on the fly with 
> declination angle. 
> 
> Thanks, 
> Marian 
> 
>  
> 
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Re: [Qgis-user] Georeferencer takes excessive time

[Nicolas Cadieux]

Hi,

Are you using the same interpolation methods?  If you used nearest neighbour 
normally and changed to cubic, if could take much more time for the same thing. 
Check the file size and try with a smaller file.  Could be a very simple 
thing

Nicolas

> Le 15 mai 2017 à 06:39, UserError [via OSGeo.org] 
>  a écrit :
> 
> QGIS 2.18 on Linux Mint 18.1 64 bit
> 
> I recently  had to clean install my OS & QGIS etc.  Whilst it's mostly 
> working, the raster georeferencer is unusably slow most of the time.
> 
> I thought initially it didn't like jpgs and pdfs were OK, but it is the same 
> regardless.  On clicking transform, the progress indication window opens & it 
> will sit there for an indeterminate period (I left it over 30 minutes once). 
> There is a lot of CPU activity across all four cores.  The only way out I've 
> found is to kill QGIS.
> 
> If I have the Target Resolution box empty, the result is an image comprising 
> large blocks/pixels and a wide black component.  If I select the target 
> resolution, I can improve the image (but still unusable) however, to get 
> anything vaguely usable, the process takes ages as mentioned above
> 
> All my previous installations have been fine & I have never had a problem 
> with the georeferencer.
> 
> Any ideas where to look please?
> Many thanks
> -- 
> Jonathan Webb 
> Freelance GIS Specialist 
> 07941 921905 
> http://www.jwebbgis.co.uk
> http://uk.linkedin.com/in/jwebbgis
> 
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Re: [Qgis-user] Interpolation, include breaklines for buildings

[Nicolas Cadieux]

Hi,

I am not sure I understand but why not just use the ground points and the 
building points together in the same DEM?  Do you only have the ground 
classified points?  

Nicolas

> Le 12 mai 2017 à 10:05, KevinKnoche [via OSGeo.org] 
>  a écrit :
> 
> Hey there, 
> 
> I'm currently working on a project concerning heavy rainfalls. What I'm 
> supposed to do is an 2D numerical calculation of flooded area of a town. For 
> this I have a special plugin for QGIS. 
> 
> What this plugin needs is a precise DEM includes breaklines of buildings, 
> walls etc. 
> I've already managed to build up a DEM from LIDAR Data including some 
> breaklines with Z-Values. 
> What makes some trouble is the fact, that I only managed to include the 
> breaklines for the buildings like a bowl so that they only have foundation 
> walls and no roof. So if it would rain they will be filled up with water 
> instead of contributing to the surface runoff. 
> 
> Does somebody of you have an idea how to include roofs onto the breaklines? 
> Plane ones would be precise enough. 
> 
> Thanks a lot :) 
> Kevin 
> 
> 
> 
> 
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Re: [Qgis-user] QGIS FUnctionality Survey

[Nicolas Cadieux]

Hi Viktória,

I will be happy fill out the form.  Did you make the forme using google sheets 
and a form?  It looks good.  Can I suggest you check with the university to 
make sure we don't need to fill in a consent form for the study?  It would be a 
waist of time having data and not be able to use it because of a missing 
consent form.  I am just asking based on my own university's policies.  I also 
know a friend to had trouble tracking down people that had answered some 
question without such a form.  You may not need to but please check with your 
supervisor. 

Good luck with your project. It would be nice to share the results with us 
later.
Nicolas

> Le 11 mai 2017 à 08:47, Viktória Vargová [via OSGeo.org] 
>  a écrit :
> 
> Dear respondents,
> my name is Viktória Vargová. I am studying Geography and German language at 
> the University of Prešov and now I am working on my bachelor thesis about 
> QGIS software. One of the aims of thesis is to find out user satisfaction 
> with basic QGIS functionality.
> 
> I would like to request you to fill this survey, which is anonymous and will 
> be used only for purposes of bachelor thesis. Please read the questions 
> carefully and choose one of the options which you agree with.
> 
> Thank you very much for your time and cooperation.​​
>   QGIS Functionality Survey
> ​
> 
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Re: [Qgis-user] Issue with georeferencing plug-in

[Nicolas Cadieux]

Hi,

Make sure your project projection is in the same projection as the OSM layer. 
Do not use reproject on the fly for now.  If the new layer is created under the 
osm layer in the layer panel, you need to place it above the OSM layer as both 
are rasters. Later you can play with transparency or rendering on the raster 
layer properties.   You can also hide the OSM layer.  

In order to figure out if you have a projection problem, hide the base map and 
click on the georeferenced layer, then right click in the layer panel, select 
zoom to layer extent.   Turn on the basemap and try to figure where your 
georeferenced map ends up.  Look at the coordinates. That should help.  You 
need to carefully select the input (best guest) and output projection (the 
basemap projection) in the georeferencer plugin.

Nicolas

> Le 7 mai 2017 à 16:14, Charlotte Wolter [via OSGeo.org] 
>  a écrit :
> 
> Hello, 
> 
>  We were using the georeferencing plug-in to add 
> georeferenced points to a historic map. 
>  Everything seemed to go fine. We added four points, then 
> clicked on the small green arrow that supposedly sets it in motion. 
> We got a finished georeferenced historic map TIFF, but the new map 
> would not display superimposed on OpenStreetMap (our basemap). Both 
> the TIFF layer and the OpenStreetMap layer appear in the Layers 
> panel, but we see only the OpenStreetMap layer. 
>  How can we superimpose the new georeferenced TIFF on the 
> OpenStreetMap layer? 
>  Thanks 
> 
> Charlotte Wolter 
> 
> 
> Charlotte Wolter 
> 927 18th Street Suite A 
> Santa Monica, California 
> 90403 
> +1-310-597-4040 
> [hidden email] 
> Skype: thetechlady 
> 
> 
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Re: [Qgis-user] Map georeference question

[Nicolas Cadieux]

Hi,

You can do this 2 way.  When you are doing the georeferencing, you can select 
"use 0 for transparency when needed."  This can sometimes give good results but 
can leave some transparent pixels in the map depending on the image.  

Another way is to right click on the layer in the layer panel, to select layer 
properties, than to go to transparency.  You can add a temporary no data value 
or play with the custom transparency options.

The no data entered here is temporary and will not be used in the raster math 
for example.  It is for the screen rendering only.

Nicolas

> Le 12 avr. 2017 à 10:17, scott.madry [via OSGeo.org] 
>  a écrit :
> 
> Hello, QGIS gurus and friends.
> 
> 
> Some of my students are georeferencing historical maps in QGIS, and want to 
> remove the black edge areas that appear after the raster arrays are warped, 
> or at least make these and only these black areas completely transparent.  
> Seems a simple task?  Thanks- Scott Madry, UNC Chapel Hill, USA
> 
> 
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Re: [Qgis-user] degrees: is degr/min/sec still used? Or decimal preferable?

[Nicolas Cadieux]

Hi,

Other people have given you good mathematical /computational answers.  Between 
decimal degrees (dd) and d/m/s, i find that dd is easier to handle.  However 
the choice of using a degrees or a national CRS in meter or feet is not just 
limited to the x and y coordinate format. If you are positioning only 2D point 
data, I expect you can get away with it but if you have angles, distances, 
heights,  areas or volume to measure, then there are other parameters to take 
into account in the CRS.  X,y formats are then just one parameter in a much 
more complexe CRS picture (like the geiod).  The ultimate goal of all these CRS 
is to reduce distortion for a particular type of measurement over a particular 
part of the world.   Therefore, depending on the problem, a CRS in degrees is 
sometimes called for, and a sometimes not.

Nicolas

> Le 10 avr. 2017 à 02:39, Richard Duivenvoorde [via OSGeo.org] 
>  a écrit :
> 
> Hi List, 
> 
> Had a discussion here with some people about the use of showing the 
> latlon degrees in degrees/minute/seconds tuple instead of the decimal 
> notation: 
> "4.40069397,51.71060887" 
> vs 
> "4°24′02.49807059″E,51°42′38.19184916″N" (or variations on that) 
> 
> Is there some general preference in this? To me the first one is just 
> easier to handle, but I'm not sure what the general preference is in the 
> GIS world. 
> 
> Any comments? 
> 
> Or is everybody using the national crs's anyway :-) 
> 
> Regards, 
> 
> Richard Duivenvoorde 
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Re: [Qgis-user] QGIS Server cannot use port 80

[Nicolas Cadieux]

Hi,
Port 80 and 8080 are standard internet ports.  Almost anything using the web 
with http will use that port.   Can't help much with the qgis web server but 
yes, i am sure it can be configured to use any port but using port 80 should 
not be a problem.  This link should help.

http://www.itopen.it/qgis-server-python-plugins-ubuntu-setup/

https://fr.m.wikipedia.org/wiki/Liste_de_ports_logiciels

> Le 4 avr. 2017 à 19:55, Tyler Veinot-2 [via OSGeo.org] 
>  a écrit :
> 
> Hi;
> All the QGIS Server tutorials I can find setup using port 80, my windows 10 
> PC is using port 80 for something but I cannot find out what. Is there a way 
> to configure on port 8080?
> I tried using netstat -aon | findstr :80, and netstat -aon | findstr :80 and 
> it gives me
>   TCP0.0.0.0:80 0.0.0.0:0  LISTENING   2272
>   TCP192.168.2.18:50527 151.101.1.69:80ESTABLISHED 6476
>   TCP192.168.2.18:50536 198.164.26.160:80  TIME_WAIT   0
>   TCP192.168.2.18:50603 151.101.1.69:80TIME_WAIT   0
>   TCP192.168.2.18:50654 198.164.26.160:80  ESTABLISHED 6476
>   TCP192.168.2.18:50656 54.243.104.69:80   ESTABLISHED 6476
>   TCP192.168.2.18:50657 104.17.27.15:80ESTABLISHED 6476
> 
> But not telling me what is using the port.
> Any thoughts? Thanks ;
> Tyler
> 
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Re: [Qgis-user] Error in clipping a raster

[Nicolas Cadieux]

Hi,

A raster can only be square or a rectangle. Try with a square or rectangle 
region.  You can use your current polygone but create a new one using the file 
extent.  After, you can use the original polygone to create a mask.  Raster 
math will then take care of "stamping out" the irregular region you do not want 
with nul values.

Nicolas

> Le 23 mars 2017 à 08:46, Giacomo Fontanelli-2 [via OSGeo.org] 
>  a écrit :
> 
> Hello forum
> 
> I'm trying to cut a raster (geo tif) using a polygon shape. Both are in the 
> same reference system. The polygon is not a regular polygon, but has many 
> vertex.
> I'm using raster > extraction > clipper, but at the end I receive this error 
> message
> ERROR 1: Unable to compute a transformation between pixel/line and 
> georeferenced coordinates for /home/giacomo/Desktop/RSM/bordi.tif.
> There is no affine transformation and no GCPs.
> 
> Thank you
> 
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Re: [Qgis-user] GEO-REFERENCER not working

[Nicolas Cadieux]

Hi,

I have had this issue with other Windows software lately (Excel).  Could be a 
windows bug. Good to know you got it going.

Nicolas

> Le 14 mars 2017 à 11:16, civil142 [via OSGeo.org] 
> <ml-node+s1560n5312270...@n6.nabble.com> a écrit :
> 
> Hi Nicolas,
> 
>  
> 
> Since your reply I managed to solve it (with some thought triggers from 
> another respondent). Essentially I had two screens, but had to lose one 
> temporarily. When I again had two screens I swapped them around. The 
> Georeferencer must have been appearing out of the viewable area, even though 
> I had two screens once again connected. I swapped the screens back over today 
> and then opened the georeferencer and there it was.
> 
>  
> 
> Many thanks for your help, thankfully the issue is now resolved, but its 
> seems odd that this wasnt resolved by an uninstall / reinstall etc.
> 
>  
> 
> Many thanks,
> 
>  
> 
> Ian
> 
>  
> 
> From: Nicolas Cadieux [via OSGeo.org] [mailto:ml-node+[hidden email]] 
> Sent: 14 March 2017 15:12
> To: Ian kirk-ellis
> Subject: Re: GEO-REFERENCER not working
> 
>  
> 
> Hi,
> 
>  
> 
> I don't have the reste of the post.  What is the georefrencer doing?  Do you 
> have other issues with Python extensions?  Is there a funny caracter (like é) 
> in you user name path?  Did you have two screens before and now, only have 
> one?  
> 
>  
> 
> You could repost with all the information adding the windows and qgis 
> versions and the installer used.  
> 
>  
> 
> You could also have a look at the bug list to figure it out. 
> 
> Nicolas
> 
>  
> 
> 
> Le 14 mars 2017 à 10:22, civil142 [via OSGeo.org] <[hidden email]> a écrit :
> 
> Hi Nicolas,
> 
>  
> 
> I removed all the .qgis2 folders within my login, but not from other users, I 
> would imagine I would have to be logged in as them and as some of them have 
> now left the company this may be difficult. I removed the registry keys.
> 
>  
> 
> I did a full uninstall using the uninstall routine, but also used (after this 
> failing) further uninstall software to get rid of remaining elements.
> 
>  
> 
> Many thanks,
> 
>  
> 
> Ian
> 
>  
> 
> From: Nicolas Cadieux [via OSGeo.org] [mailto:ml-node+[hidden email]] 
> Sent: 14 March 2017 14:08
> To: Ian kirk-ellis
> Subject: Re: GEO-REFERENCER not working
> 
>  
> 
> Hi,
> 
>  
> 
> Did you manually remove all .qgis2 folders for all the users in the 
> computers? If you have have 3 users , you have 3 .qgis2 folders.  Did you 
> destroy the registry keys? 
> 
>  
> 
> You talk about a full uninstall, what procedure did you use? You must have 
> something lying around giving you problems.  
> 
>  
> 
> Nicolas
> 
>  
> 
>  
> 
>  
> 
> 
> Le 14 mars 2017 à 07:27, civil142 [via OSGeo.org] <[hidden email]> a écrit :
> 
> Hi Nicolas, 
> 
> It was working originally and I used it a lot. I have uninstalled QGIS 
> several times and replaced with several subsequent versions but it still 
> remains broken. When I click the geo referencer button, nothing happens. 
> 
> I have to use QGIS on a new machine to use the geo reference function. You 
> would think that a full uninstall and a reinstall would fix any such issues, 
> however this persists. 
> 
> Kind regards, 
> 
> Ian
> 
> If you reply to this email, your message will be added to the discussion 
> below:
> 
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> 
>  
> 
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> 
>  
> 
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Re: [Qgis-user] GEO-REFERENCER not working

[Nicolas Cadieux]

Hi,

I don't have the reste of the post.  What is the georefrencer doing?  Do you 
have other issues with Python extensions?  Is there a funny caracter (like é) 
in you user name path?  Did you have two screens before and now, only have one? 
 

You could repost with all the information adding the windows and qgis versions 
and the installer used.  

You could also have a look at the bug list to figure it out. 
Nicolas


> Le 14 mars 2017 à 10:22, civil142 [via OSGeo.org] 
> <ml-node+s1560n5312261...@n6.nabble.com> a écrit :
> 
> Hi Nicolas,
> 
>  
> 
> I removed all the .qgis2 folders within my login, but not from other users, I 
> would imagine I would have to be logged in as them and as some of them have 
> now left the company this may be difficult. I removed the registry keys.
> 
>  
> 
> I did a full uninstall using the uninstall routine, but also used (after this 
> failing) further uninstall software to get rid of remaining elements.
> 
>  
> 
> Many thanks,
> 
>  
> 
> Ian
> 
>  
> 
> From: Nicolas Cadieux [via OSGeo.org] [mailto:ml-node+[hidden email]] 
> Sent: 14 March 2017 14:08
> To: Ian kirk-ellis
> Subject: Re: GEO-REFERENCER not working
> 
>  
> 
> Hi,
> 
>  
> 
> Did you manually remove all .qgis2 folders for all the users in the 
> computers? If you have have 3 users , you have 3 .qgis2 folders.  Did you 
> destroy the registry keys? 
> 
>  
> 
> You talk about a full uninstall, what procedure did you use? You must have 
> something lying around giving you problems.  
> 
>  
> 
> Nicolas
> 
>  
> 
>  
> 
>  
> 
> 
> Le 14 mars 2017 à 07:27, civil142 [via OSGeo.org] <[hidden email]> a écrit :
> 
> Hi Nicolas, 
> 
> It was working originally and I used it a lot. I have uninstalled QGIS 
> several times and replaced with several subsequent versions but it still 
> remains broken. When I click the geo referencer button, nothing happens. 
> 
> I have to use QGIS on a new machine to use the geo reference function. You 
> would think that a full uninstall and a reinstall would fix any such issues, 
> however this persists. 
> 
> Kind regards, 
> 
> Ian
> 
> If you reply to this email, your message will be added to the discussion 
> below:
> 
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Re: [Qgis-user] GEO-REFERENCER not working

[Nicolas Cadieux]

Hi,

Did you manually remove all .qgis2 folders for all the users in the computers? 
If you have have 3 users , you have 3 .qgis2 folders.  Did you destroy the 
registry keys? 

You talk about a full uninstall, what procedure did you use? You must have 
something lying around giving you problems.  

Nicolas




> Le 14 mars 2017 à 07:27, civil142 [via OSGeo.org] 
>  a écrit :
> 
> Hi Nicolas, 
> 
> It was working originally and I used it a lot. I have uninstalled QGIS 
> several times and replaced with several subsequent versions but it still 
> remains broken. When I click the geo referencer button, nothing happens. 
> 
> I have to use QGIS on a new machine to use the geo reference function. You 
> would think that a full uninstall and a reinstall would fix any such issues, 
> however this persists. 
> 
> Kind regards, 
> 
> Ian 
> 
> If you reply to this email, your message will be added to the discussion 
> below:
> http://osgeo-org.1560.x6.nabble.com/GEO-REFERENCER-not-working-tp5271041p531.html
> To start a new topic under QGIS - User, email 
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Re: [Qgis-user] Georeferencer not working despite reinstallation

[Nicolas Cadieux]

http://gis.stackexchange.com/questions/152873/how-to-completely-uninstall-and-remove-qgis-2-8-1

This should work.
Nicolas

> Le 28 févr. 2017 à 08:05, Ian kirk-ellis [via OSGeo.org] 
>  a écrit :
> 
> The georeferencing function on the install on my PC stopped working, ie you 
> click the icon and no window pops up. I uninstalled and have reinstalled 
> several versions now but this doesnt work - any ideas ? How can I completely 
> remove it to do a fully fresh install - or is there a fix out there ?
> 
>  
> 
>  
> 
>  
> 




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Re: [Qgis-user] maps rotated and reversed.

[Nicolas Cadieux]

Hi,

You have CRS problem.  Your map is probably in a coordinate reference system 
that uses  x,y, but you are probably selecting a CRS that uses y,x. Ex: 
latitude/longitude vs long/lat. that would explain everything.

Nicolas

> Le 26 févr. 2017 à 10:33, Randal Hale [via OSGeo.org] 
>  a écrit :
> 
> Make sure your CRS of the georeferencer and the CRS of QGIS are the same. I 
> bet you're mixing stateplane/utm with WGS84 (4326). 
> 
> Randy
> 
> 
>> On 02/26/2017 10:04 AM, Charles Barrows wrote:
>> I am using  the Georeferencer plugin on a jpg map.  Everything goes 
>> smoothly, but the resultant map file in QGIS has been rotated 90 degrees and 
>> reversed.  The rotation is easy to handle but I can’t figure out how to 
>> reverse the reverse.  What am I doing wrong?
>> 
>> Charley
>> 
>>  
>> 
>> 
>> 
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> http://www.northrivergeographic.com
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> twitter:rjhale http://about.me/rjhale
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Re: [Qgis-user] Can you see me? (my e-mail)

[Nicolas Cadieux]

Hi,
Try reposting or a better explanation.  There are no stupid questions...
Nicolas

> Le 19 févr. 2017 à 10:05, berndv. [via OSGeo.org] 
>  a écrit :
> 
> YES,
> but I have no answers for your questions.
> 
> Good luck
> Bernd
> 
> 
> Am 19.02.2017, 15:13 Uhr, schrieb Velizar Strumberger <[hidden email]>:
> 
> I requested several ties for assistance but there was no answer. Therefore I 
> can conclude on of the following: 1) my questions are stupid and nobody wants 
> to answer; 2) nobody knows the answer or 3) I am sending my emails to the 
> wrong address.
> Will somebody please answer with a YES if you can read this e-mail.
> 
> Thank you
> Strumbi
> 
> 
> 
> 
> --
> Bernd Vogelgesang
> Siedlerstraße 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
> 
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Re: [Qgis-user] Is there any way to constrain the resources QGis uses?

[Nicolas Cadieux]

Hi,

Qgis works well with 4GB of memory on windows 7-64 for simple projects.  If 
possible, I would have more that one VM that would be configured with each 4GB 
of ram and limit 1 user at a time per VM.  If your server can handle the load, 
that would be the best way to go it think.

Nicolas

> Le 10 févr. 2017 à 09:04, Ian Turton [via OSGeo.org] 
>  a écrit :
> 
> We have several users on the same VM which is what causes the contention for 
> memory
> 
> Ian
> 
>> On 10 February 2017 at 13:44, Richard McDonnell <[hidden email]> wrote:
>> Ian,
>> You could try to limit the max amount of ram available for each VM, this 
>> would have been done when each, was created, you should probably start there!
>> Its under Settings, System, Motherboard and Base Memory, I would say reduce 
>> it so as each VM has equal Memory and you leave a bit for the host.
>> 
>> Regards,
>> 
>> Richard.
>> 
>> 
>>> On 09/02/2017 14:26, Neumann, Andreas wrote:
>>> Hi Ian,
>>> 
>>> You can limit the nr of CPU cores it uses for rendering:
>>> 
>>> Settings --> Options --> Rendering --> Render layers in parallel / Max cores
>>> 
>>> I don't think you can limit memory consumption with QGIS settings.
>>> 
>>> Andreas
>>> 
 On 2017-02-09 14:31, Ian Turton wrote:
 
 I know that sounds like something you wouldn't want to do but we have a 
 number of users sharing a VM and if the first QGis started manages to grab 
 all (or even most) of the available memory it prevents the other users 
 from being able to start QGis let alone use it.
  
 Cheers
  
 Ian
  
 -- 
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>>>  
>>> 
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>> 
>> -- 
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>> GIS Specialist PgD GIS AssocSCSI
>> OPW FRM Data Management
>> 52 Stephens Green, Dublin 2.
>> TEL: 01 6476543
>> 
>> 
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> 
> 
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Re: [Qgis-user] crs

[Nicolas Cadieux]

Hi,

I see that Richard has responded correctly.  I will just add that dxf files do 
not really have a CRS.  You just need to know it!  Usually, the coordinates are 
in meters or feet and correspond to a local CRS (ex UTM zone 18N).  You may 
have to do some trial and error in order to find the original CRS.  When you 
find that, saving it as a shape file as Richard mentioned, and then specifying 
the crs, is a good way to go.

Good luck
Nicolas

> Le 10 févr. 2017 à 07:27, Boaz Bar Ilan [via OSGeo.org] 
>  a écrit :
> 
> hi
> 
> I have a dxf file ( converted from dwg ) . its coodinates are in the old grid.
> 
> how can I match it to the new grid ?
> 
> whaen I change it in the project property it doesn't work
> 
> thanks
> 
> boaz
> 
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Re: [Qgis-user] Merge Raster Problem

[Nicolas Cadieux]

Hi,
You can just create a virtual raster with both scenes.  The second raster will 
be on top of the first.  You can then save the resulting image.

The merge should work...  is there a box for the raster extent?  (I don't have 
qgis in front of me.)

Nicolas

> Le 10 janv. 2017 à 23:46, Grant Boxer [via OSGeo.org] 
>  a écrit :
> 
> I am trying to merge (under Raster>Miscell>Merge) two adjacent ASTER 
> satellite scenes and I keep getting a merge result that only contains the 
> overlapping area, not an image of two complete scenes. Can anyone point out 
> what I might be doing wrong?
> 
>  
> 
> Grant Boxer (FAIG RpGeo)
> 
> Maylands, Western Australia
> 
>  
> 
> 
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Re: [Qgis-user] one feature doesn't show when zooming in to a normal level

[Nicolas Cadieux]

Hi,
You could try building a spatial index for the shapefile.  Maybe that could 
help.
Nicolas

> Le 4 janv. 2017 à 03:29, Matthias Kuhn-2 [via OSGeo.org] 
>  a écrit :
> 
> Hi, 
> 
> I did a quick check with your attached dataset on 2.18 and master but 
> couldn't see any disappearing features between these scales. 
> 
> Does it happen with a new project as well? 
> Which gdal/ogr version are you using (Help->About)? 
> Can you try to save the file as a new shapefile and try again? 
> 
> All the best 
> Matthias 
> 
> On 01/04/2017 08:21 AM, Reginald Carlier wrote:
> 
> > Hello, 
> > 
> >   
> > 
> > I have a shapefile where one feature only shows up when zooming out 
> > beyond 1/4. 
> > 
> > The other features show at all scales. 
> > 
> > I’m using QGIS 2.18.2. 
> > 
> > What could be the reason for this behaviour? 
> > 
> >   
> > 
> > Regards, 
> > 
> >   
> > 
> > Reginald Carlier 
> > Deskundige GIS 
> > 
> > logo Ingelmunster 
> > 
> >   
> > 
> > 
> > 
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Re: [Qgis-user] DWG import

[Nicolas Cadieux]

Hi Randal,

I do not use the DWG import tool so there may be a switch or an option  that I 
do not know of.  I generally export from AutoCAD Map3D with to option to export 
the z to a column.  The reality is that most AutoCAD drawing (cities plans, 
architectural drawings)  are still exclusively done in 2D and z is very often a 
simple texte value with a point symbole.  That may be your case... When you 
export that, the problem is that the z value point is a label and will 
systematically be beside the true measurement. You could fix that with some 
vector manipulations...

Good luck
Nicolas

> Le 31 déc. 2016 à 09:25, Randal Hale [via OSGeo.org] 
>  a écrit :
> 
> I've been testing the DWG Import - one question. I imported a 3D DWG 
> file and all the data data is imported (yay) but there isn't a elevation 
> attached anywhere. Is it hidden somewhere or not imported? I really 
> think I'm missing a step - possibly. 
> 
> Randy 
> 
> 
> -- 
> - 
> Randal Hale 
> North River Geographic Systems, Inc 
> http://www.northrivergeographic.com
> 423.653.3611 [hidden email] 
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Re: [Qgis-user] Convert Lines to Polygons

[Nicolas Cadieux]

Hi,
You could create a polygon from the layer extent.  Then use a spatial query to 
get the attributes from your current polylines.
Nicolas

> Le 20 déc. 2016 à 09:18, Richard McDonnell [via OSGeo.org] 
>  a écrit :
> 
> Apologies, 
> I meant to change the subject, but forgot!! So here it is, with a 
> correct subject! 
> 
> I need a little help, I have being trying to create an Index for a 
> series of CAD drawings, they each have a extent bounding box, but its 
> broken into individual lines. 
> 
> I have so far succeeded in creating a shapefile for all of them, but my 
> problem is that what I have is several thousand open polylines instead 
> of box's. each polyline starts and ends in the same point, but I need 
> them to form polygons. 
> The other thing is that the attribute data be preserved. 
> Any help appreciated. 
> Regards, 
> 
> Richard. 
> 
> 
> OPW - Ag féachaint don am atá le teacht - Ag caomhnú ón am atá thart 
> OPW - Looking to the future - Caring for the past 
> 
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Re: [Qgis-user] QGIS vs ArcGIS in Education and Practice

[Nicolas Cadieux]

Hi,

This is a good question! My answer would be that students have a better chance 
of having a job if the learn GIS and not a software.  The software is only a 
tool!  If they have an ArcGIS licence at the university and can use it year 
round with the university, they could learn with that.

My experience is that afterwards, they will either pirate the software or 
abandons GIS because they cannot pay for the software.  Also, more and more 
students are on Macs and ArcGIS will not work unless you have a dual boot, a 
virtual PC or a online licence.

Also, if you want to just use a software as a technician and make GIS research, 
 you can use ArcGIS.  If you want a really good paying job and want to be able 
learn how to develop software and develop GIS, then QGIS or OpenSource is the 
way to go!

To think that learning GIS = learning a software is short sighted.  Would you 
trust a statistician if all he learned in university is how to use a particular 
software or would you prefer someone who really knows what statistics are all 
about???

Nicolas




> Le 15 déc. 2016 à 14:18, Markus Weidenbach [via OSGeo.org] 
>  a écrit :
> 
> Dear List,
> 
> I was asked to give a 5 days international GIS training course at the 
> university and proposed to do it with QGIS. The program leader finally 
> insisted on doing it with ArcGIS arguing  that the students had better 
> chances to find a job knowing ArcGIS rather than QGIS. This argumentation 
> does not reflect my long professional experience as a GIS consultant at all!
> But how can I proof that knowing QGIS is the better choice for young GIS 
> professionals than ArcGIS (or at least that both systems are equally suited)? 
> Does anybody know any official numbers of GIS users worldwide or on the 
> worldwide application of QGIS over ArcGIS?
> 
> I know the Master thesis from Boku Vienna 
> (https://geoobserver.wordpress.com/2016/02/09/arcgis-vs-qgis/) but it is 
> focused on a technical comparison of both systems only.
> Also the link 
> https://www.g2crowd.com/grid_report/documents/gis-winter-2016-report is not 
> really helpful because it is based on some 40 reviews only and therefore not 
> representative.
> I really need to know some proven facts on the number of global QGIS users 
> and renown companies using QGIS worldwide.
> 
> Thanks for your help in advance,
> Markus
>   
> -- 
> Dr. Markus Weidenbach 
> landConsult.de 
> Geographical Information Management 
> and Environmental Planning 
> D-77815 Bühl 
> Germany 
> e.mail see: http://landConsult.de
> 
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Re: [Qgis-user] Lat/Long Grids

[Nicolas Cadieux]

Hi,

You also find the equivalent in dd and use that.  
This should help

http://www.equationsheets.com/latlon.xls

If it's just for printing, Lene has a better solution.
Nicolas

> Le 11 déc. 2016 à 03:45, Lene Fischer [via OSGeo.org] 
>  a écrit :
> 
> Hi Grant,
> In the Print Composer>Item Properties>Map you can find Grids / Draw Grid/ 
> Draw Coordinate
> Here you can specify the CRS and the format of the coordinates.
> 
> Here a quick video for an example (Sorry forgot to turn on the mic): 
> http://www.screencast.com/t/yy83fxLPm
> 
> Regards
> Lene Fischer
> From: Qgis-user [[hidden email]] on behalf of Grant Boxer [[hidden email]]
> Sent: 11 December 2016 07:05
> To: [hidden email]
> Subject: [Qgis-user] Lat/Long Grids
> 
> Is there a way to draw a geographic grid with degrees-min with exact minutes? 
> I don’t seem to be able to find the option to specify the degrees-minutes 
> option when displaying coordinates in the map composer. I get decimal 
> degrees-minutes with odd decimal grid values (e.g. 16deg 42.7’ for example). 
> The interval is only displayed in decimal degrees. Is there an option to 
> specify the minute value?
> 
>  
> 
> Grant Boxer
> 
> Consultant Geologist (FAIG R.P. Geo)
> 
> Perth, Western Australia
> 
>  
> 
> Email: [hidden email]
> 
> Mobile: 0418 954 059
> 
> Skype: grantboxer
> 
> Website: www.iinet.net.au/~gboxer
> 
>  
> 
> 
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Re: [Qgis-user] Count points overlaying a raster layer

[Nicolas Cadieux]

Hi,

There are many options.  I sometimes use the point sampling tool (with a rater 
having class data) and then export to excel or libreoffice and do a cross 
tabulation.  Some option are available directly in qgis.  Be aware that most 
plugins that deal with zonal statistics may  will not work if you have multi 
polygons.

Nicolas

http://www.qgistutorials.com/fr/docs/sampling_raster_data.html

https://conservationecology.wordpress.com/tag/zonal-statistics/
https://docs.qgis.org/2.2/en/docs/user_manual/plugins/plugins_zonal_statistics.html
https://anitagraser.com/2013/02/02/group-stats-tutorial/

> Le 28 nov. 2016 à 21:38, K Imran M [via OSGeo.org] 
>  a écrit :
> 
> Dear all,
> 
> I apologize if this has been asnwered before. My question is:
> 
> if I have 2 layers- one is a vector (points in shapefile format) layer and 
> the other one is a raster layer (flood area). And I would like to count the 
> number of points inside the flood area. How can I do that? Should I convert 
> the raster to vector first? Can anyone kindly refer me to any resource if you 
> know any?
> 
> Best regards.
> 
> Kamarul
> 
> -
> 
> Kamarul Imran Musa (MD MCommunityMed)
> Associate Professor (Epidemiology and Biostatistics) &  
> Public Health Physician,
> 
> 
> 
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Re: [Qgis-user] suddenly unable to open shape files

[Nicolas Cadieux]

Zip me the file if it's not confidential.  I can test it.

> Le 25 nov. 2016 à 12:07, Mira Kattwinkel [via OSGeo.org] 
> <ml-node+s1560n5297449...@n6.nabble.com> a écrit :
> 
> Hello Nicola 
> 
> Thanks for the suggestion but this is not the problem. I did not move 
> any files and it happens with whatever shape file I try. 
> 
> Mira 
> 
> 
> On 25/11/16 17:58, Nicolas Cadieux wrote:
> 
> > Hi, 
> > 
> > Perhaps you moved or copied the shape files and forgot to move the 
> > accompanied files (3 to 8 files with different extensions like .shx 
> > .dbf .shp .prj)?  If you just move the .shp and not the others, this 
> > is will create errors.  The .shx contains the geometries.  You may get 
> > this kind of message if you try to drag and drop the .shx and not the 
> > .shp in QGiS. 
> > 
> > .tiff will not crash because it's a lone file. 
> > 
> > Nicolas 
> > 
> > Le 25 nov. 2016 à 11:36, Mira Kattwinkel [via OSGeo.org 
> > <http://OSGeo.org>] <[hidden email] 
> > > a écrit : 
> > 
> >> Dear list 
> >> 
> >> I have been working with QGIS 2.14 and now 2.18 for a while on Linux 
> >> Mint 17. Suddenly, I cannot open shape files any more. When trying to 
> >> load them I get the message: "Layer is not valid: The layer XX.shp is 
> >> not a valid layer and can not be added to the map."  In the log message 
> >> panel under ogr it says: "Data source is invalid (Unable to open XX.shx 
> >> or XX.SHX.Try --config SHAPE_RESTORE_SHX true to restore or create it)" 
> >> 
> >> Additionally, I cannot open GRASS files any more (which also used to 
> >> work fine) and get the error:" Error reading database file from: 
> >> /usr/share/qgis/resources/srs.db Because of this the projection selector 
> >> will not work..." and then QGIS crashes. 
> >> 
> >> Interestingly, I can open shape files from my file browser (it starts 
> >> QGIS and loads the file) but then I cannot add another one. Raster 
> >> (GeoTif) data are also fine. 
> >> 
> >> I have no idea what's causing this. I have tried removing and 
> >> reinstalling QGIS (version 2.18 and 2.14) without any success. 
> >> 
> >> Can anybody give me any hint what might have corrupted my system? 
> >> 
> >> Thanks a lot, 
> >> Mira 
> >> 
> >> ___ 
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> >> discussion below: 
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> >>   
> >> 
> >> To start a new topic under Quantum GIS - User, email [hidden email] 
> >>  
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> >> NAML 
> >> <http://osgeo-org.1560.x6.nabble.com/template/NamlServlet.jtp?macro=macro_viewer=instant_html%21nabble%3Aemail.naml=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml>
> >>  
> >> 
> > 
> >  
> > View this message in context: Re: suddenly unable to open shape files 
> > <http://osgeo-org.1560.x6.nabble.com/suddenly-unable-to-open-shape-files-tp5297446p5297448.html>
> >  
> > Sent from the Quantum GIS - User mailing list archive 
> > <http://osgeo-org.1560.x6.nabble.com/Quantum-GIS-User-f4125267.html> 
> > at Nabble.com. 
> > 
> > 
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> -- 
> Dr. Mira Kattwinkel 
> Quantitative Landscape Ecology 
> Institute for Environmental Sciences 
> University of Koblenz-Landau 
> Fortstraße 7 
> 76829 Landau 
> Germany 
> Phone: + 49 6341 280-31553 
> Office: Building I, Room 2.02 
> 
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Re: [Qgis-user] suddenly unable to open shape files

[Nicolas Cadieux]

Hi,

Perhaps you moved or copied the shape files and forgot to move the accompanied 
files (3 to 8 files with different extensions like .shx .dbf .shp .prj)?  If 
you just move the .shp and not the others, this is will create errors.  The 
.shx contains the geometries.  You may get this kind of message if you try to 
drag and drop the .shx and not the .shp in QGiS.  

.tiff will not crash because it's a lone file.  

Nicolas

> Le 25 nov. 2016 à 11:36, Mira Kattwinkel [via OSGeo.org] 
>  a écrit :
> 
> Dear list 
> 
> I have been working with QGIS 2.14 and now 2.18 for a while on Linux 
> Mint 17. Suddenly, I cannot open shape files any more. When trying to 
> load them I get the message: "Layer is not valid: The layer XX.shp is 
> not a valid layer and can not be added to the map."  In the log message 
> panel under ogr it says: "Data source is invalid (Unable to open XX.shx 
> or XX.SHX.Try --config SHAPE_RESTORE_SHX true to restore or create it)" 
> 
> Additionally, I cannot open GRASS files any more (which also used to 
> work fine) and get the error:" Error reading database file from: 
> /usr/share/qgis/resources/srs.db Because of this the projection selector 
> will not work..." and then QGIS crashes. 
> 
> Interestingly, I can open shape files from my file browser (it starts 
> QGIS and loads the file) but then I cannot add another one. Raster 
> (GeoTif) data are also fine. 
> 
> I have no idea what's causing this. I have tried removing and 
> reinstalling QGIS (version 2.18 and 2.14) without any success. 
> 
> Can anybody give me any hint what might have corrupted my system? 
> 
> Thanks a lot, 
> Mira 
> 
> ___ 
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Re: [Qgis-user] Redefining Administrative Boundaries

[Nicolas Cadieux]

Hi,
Or some spatial query?  Would help if we could visualize.
Nicolas

> Le 24 nov. 2016 à 13:13, macho [via OSGeo.org] 
>  a écrit :
> 
> Hi, 
> That sounds like you want to Aggregat after some attribute. Is that the 
> correct direction? 
> Regards Werner 
> 
> 
> On 24 November 2016 19:01:51 Ricardo Thompson <[hidden email]> wrote: 
> 
> > Hi, 
> > 
> > I have two shp files of the same geographic area but they represent 
> > different administrative levels. I want to redefine the higher lever 
> > boundaries based on lower administrative level boundaries. 
> > 
> > Can somebody help? 
> > 
> > Ricardo 
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Re: [Qgis-user] Python error on startup

[Nicolas Cadieux]

Hi,

Next time, I recommend you install Anaconda Python.  It come with a number of 
scientific packages.  You can indicate during the installation that you do not 
want to change the environment variables.

Nicolas

> Le 22 nov. 2016 à 16:06, Stephen Ban [via OSGeo.org] 
> <ml-node+s1560n5297018...@n6.nabble.com> a écrit :
> 
> Oddly, I was able to fix it by simply reinstalling/upgrading numpy in my 
> existing Python 2.7 install.
> 
>  
> 
> It doesn’t make any sense to me, but it works.
> 
>  
> 
> From: Qgis-user [mailto:[hidden email]] On Behalf Of Nicolas Cadieux
> Sent: November 22, 2016 12:22 PM
> To: [hidden email]
> Subject: Re: [Qgis-user] Python error on startup
> 
>  
> 
> Hi,
> 
> You need to change your default Python to the one that qgis uses.  You can 
> change that in the windows environment variables
> 
> Nicolas
> 
> 
> Le 22 nov. 2016 à 14:38, Stephen Ban [via OSGeo.org] <[hidden email]> a écrit 
> :
> 
> Hi,
> 
>  
> 
> I recently started getting an error message when launching QGIS. I can’t 
> pinpoint exactly when it started happening, but I’m pretty sure it must be 
> related to a recent install of Python when I had both Python 2.7 and 3.5 
> installed. I also have ArcGIS on my machine, so that was the only Python 
> version installed for awhile. I then installed Python 3.5 to do some testing, 
> but have since uninstalled it so the only remaining standalone Python version 
> is ArcGIS’s 2.7. I’ve purged any extraneous Python environment variables and 
> cleaned the Windows registry to no effect. I’m running Windows 10 64-bit 
> edition, and have always installed the 64-bit versions of QGIS.
> 
>  
> 
> I was originally running GQIS 2.16.1, then uninstalled it and installed QGIS 
> 2.18. Both versions give me the same error message on startup: “Python error: 
> Couldn’t load plugin ‘processing’ See message log (Python Error) for more 
> details.” The Python message log contains the following:
> “1 Traceback (most recent call last):
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 308, in 
> loadPlugin
> 
> __import__(packageName)
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\__init__.py", 
> line 29, in 
> 
> from processing.tools.general import * # NOQA
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\tools\general.py",
>  line 31, in 
> 
> from processing.core.Processing import Processing
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\core\Processing.py",
>  line 55, in 
> 
> from processing.algs.qgis.QGISAlgorithmProvider import QGISAlgorithmProvider
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\algs\qgis\QGISAlgorithmProvider.py",
>  line 109, in 
> 
> from .RasterLayerStatistics import RasterLayerStatistics
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\algs\qgis\RasterLayerStatistics.py",
>  line 36, in 
> 
> from processing.tools import raster
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\tools\raster.py",
>  line 29, in 
> 
> import numpy
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:\Users\steph\AppData\Roaming\Python\Python27\site-packages\numpy\__init__.py",
>  line 180, in 
> 
> from . import add_newdocs
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/.

Re: [Qgis-user] Python error on startup

[Nicolas Cadieux]

Hi,
You need to change your default Python to the one that qgis uses.  You can 
change that in the windows environment variables
Nicolas

> Le 22 nov. 2016 à 14:38, Stephen Ban [via OSGeo.org] 
>  a écrit :
> 
> Hi,
> 
>  
> 
> I recently started getting an error message when launching QGIS. I can’t 
> pinpoint exactly when it started happening, but I’m pretty sure it must be 
> related to a recent install of Python when I had both Python 2.7 and 3.5 
> installed. I also have ArcGIS on my machine, so that was the only Python 
> version installed for awhile. I then installed Python 3.5 to do some testing, 
> but have since uninstalled it so the only remaining standalone Python version 
> is ArcGIS’s 2.7. I’ve purged any extraneous Python environment variables and 
> cleaned the Windows registry to no effect. I’m running Windows 10 64-bit 
> edition, and have always installed the 64-bit versions of QGIS.
> 
>  
> 
> I was originally running GQIS 2.16.1, then uninstalled it and installed QGIS 
> 2.18. Both versions give me the same error message on startup: “Python error: 
> Couldn’t load plugin ‘processing’ See message log (Python Error) for more 
> details.” The Python message log contains the following:
> “1 Traceback (most recent call last):
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 308, in 
> loadPlugin
> 
> __import__(packageName)
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\__init__.py", 
> line 29, in 
> 
> from processing.tools.general import * # NOQA
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\tools\general.py",
>  line 31, in 
> 
> from processing.core.Processing import Processing
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\core\Processing.py",
>  line 55, in 
> 
> from processing.algs.qgis.QGISAlgorithmProvider import QGISAlgorithmProvider
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\algs\qgis\QGISAlgorithmProvider.py",
>  line 109, in 
> 
> from .RasterLayerStatistics import RasterLayerStatistics
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\algs\qgis\RasterLayerStatistics.py",
>  line 36, in 
> 
> from processing.tools import raster
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python/plugins\processing\tools\raster.py",
>  line 29, in 
> 
> import numpy
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:\Users\steph\AppData\Roaming\Python\Python27\site-packages\numpy\__init__.py",
>  line 180, in 
> 
> from . import add_newdocs
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:\Users\steph\AppData\Roaming\Python\Python27\site-packages\numpy\add_newdocs.py",
>  line 13, in 
> 
> from numpy.lib import add_newdoc
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:\Users\steph\AppData\Roaming\Python\Python27\site-packages\numpy\lib\__init__.py",
>  line 8, in 
> 
> from .type_check import *
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:\Users\steph\AppData\Roaming\Python\Python27\site-packages\numpy\lib\type_check.py",
>  line 11, in 
> 
> import numpy.core.numeric as _nx
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", line 607, in 
> _import
> 
> mod = _builtin_import(name, globals, locals, fromlist, level)
> 
> File 
> "C:\Users\steph\AppData\Roaming\Python\Python27\site-packages\numpy\core\__init__.py",
>  line 14, in 
> 
> from . import multiarray
> 
> File "C:/PROGRA~1/QGIS21~1.1/apps/qgis/./python\qgis\utils.py", 

Re: [Qgis-user] Gridding vector data

[Nicolas Cadieux]

Hi,

There is the terrain modelling tools in Qgis.  You can try inverse distance 
weight.  You also have tool the gdal_grid tools in the raster menu and in 
processing. Keep in mind that you can modify the option to get interpolation 
methods that are not in the GUI.  

I think Grass has a local or universal Krigging also.  If not. You could find 
that in CrimeStat I think.

Nicolas

http://www.gdal.org/gdal_grid.html

> Le 22 nov. 2016 à 07:47, Lester Anderson [via OSGeo.org] 
>  a écrit :
> 
> I normally grid data outside of QGIS using GMT and then import surfer 
> grids (or Ascii raster) into QGIS. Not really tried the gridding 
> options within QGIS 
> 
> On 22 November 2016 at 08:32, Grant Boxer <[hidden email]> wrote:
> 
> > I am trying to find a good option for gridding geochemical soil sampling 
> > data. I have tried the raster>analyse>Grid option, plus a couple of others 
> > in the SAGA toolbox, but I have found it difficult to get a good smooth 
> > result. Does anyone have any other suggestions? 
> > 
> > 
> > 
> > Grant Boxer 
> > 
> > Perth, Western Australia 
> > 
> > 
> > 
> > 
> > ___ 
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Re: [Qgis-user] MapInfo to QGIS style generator ; error message

[Nicolas Cadieux]

Hi,
I wish I could help.  I don't have that version of Mapinfo.  You could try 
installing an older version of the program to test.  My hope is that Nathan 
will help you out.  It would be nice to have that code in the openWOR plugin.

http://www.geoinformations.developpement-durable.gouv.fr/extension-openwor-version-2-6-a1792.html

Nicolas

> Le 18 nov. 2016 à 04:01, dandrigo [via OSGeo.org] 
>  a écrit :
> 
> Hello, 
> 
> For remind, i'm working on Windows 10 64 bits,mapinfo new version Pro 16.0, 
> QGIS 2.16.3.Following  to my previous message, I succeed in resolving my 
> first problem regarding the error message. The Peter 's procedure allows 
> indeed to no longer have an error message during the execution of the 
> command.I remind you the following post (giving the soution) : 
> 
> http://gis.stackexchange.com/posts/217934/revisions
> 
>  However, now, when i rerun the same command but the plugin does not still 
> seem to work. No task is done. I let the process run all the night. And the 
> status stays always on 
> "Opening Mapinfo ... Exporting style table" . 
>  No qml file has been generated. It's strange because i managed to use this 
> plugin in march 2015 last year (with a previous mapinfo version) ... 
> According to you, the reason of the problems could be from updates realised 
> beteween previous version and last new mapinfo v.16? 
> Is it possible for someone to try a quick test ? I have already post a 
> message on the Nathan's Blog(plugin 's issues) : 
> 
> https://github.com/NathanW2/MapInfo-to-QGIS-style-generator/issues/4
> 
> This plugin is really important for my work. 
> 
> 
> -- 
> 
> 
> 
> actual 
> 
> pip freeze | grep win32 
> 
> mine is: 
> 
> pywin32==218 
> 
> but I never used that script 
> Luigi Pirelli 
> 
> **
>  
> * Boundless QGIS Support/Development: lpirelli AT boundlessgeo DOT com 
> * LinkedIn: https://www.linkedin.com/in/luigipirelli
> * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli
> * GitHub: https://github.com/luipir
> * Mastering QGIS 2nd Edition: 
> * 
> https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition
> **
>  
> 
> 
> On 16 November 2016 at 01:37, dandrigo <[hidden email]> wrote: 
> > Good morning, 
> > 
> > I'm working on windows 10 with mapinfo 16, qgis 2.16.3. 
> > 
> > I tried to use the usefull following plugin called "MapInfo to QGIS style 
> > generator": 
> > 
> > https://github.com/NathanW2/MapInfo-to-QGIS-style-generator/wiki/Using-MapInfo-to-QGIS-style-generator.
> >  
> > 
> > But when i launch this following command via osgeo4w shell : 
> > 
> > python mapinfoToQgis.py F:\temp\commerces.TAB F:\temp\out.qml -c 
> > ID_SYMBOLOGIE --UseMapInfo 
> > 
> > An error message appears. I send you the attachment showing the error 
> > message. 
> > 
> > 
> > 
> > Could you throw light for me regarding the meaning of the error message and 
> > could youhow to help me in order to find a solution? 
> > 
> > In advance, thank you very much. 
> > 
> > 
> > 
> > -- 
> > View this message in context: 
> > http://osgeo-org.1560.x6.nabble.com/MapInfo-to-QGIS-style-generator-error-message-tp5295947.html
> > Sent from the Quantum GIS - User mailing list archive at Nabble.com. 
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Re: [Qgis-user] USING QGIS ON AN OFFICE NETWORK

[Nicolas Cadieux]

Hi,

Our office is a bit bigger. We have some data on a Samba Linux file server and 
permissions are decided using the samba user and group management. We also have 
an Postgis server.  http://www.postgis.net/ but most of the Data is files (shp, 
tiff...) on the samba server and people have mapped network drives. 

It all depends on the local setup.  At the very beginning, all we had was a NAS 
and about 10 computers working in a Microsoft Workgroup environment so there 
has no main server.  If you buy a good small NAS, you could use that for the 
file reading and writing permissions.  They are usually built with a Linux 
distribution with a samba server running.

Nicolas


> Le 20 nov. 2016 à 10:38, GEORGE MICHAILIDIS [via OSGeo.org] 
>  a écrit :
> 
> Could you please provide me with some guidiles of how to use the QGIS in a 
> office network (around 10PC) 
> where the users will be able to see the projects and make spartial queries 
> but will not be able to edit the data of the layers ? Is it possible to input 
> licence priveledges to some users, or to lock some layers or group layers.
> 
> Best regards George
> 
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Re: [Qgis-user] Georeferencing issues and vector grid problems

[Nicolas Cadieux]

Hi 
See below for answers,

> Le 16 nov. 2016 à 05:00, Alexander James Metcalfe [via OSGeo.org] 
>  a écrit :
> 
> 
> Hi QGIS community, 
> 
> My reason for using QGIS is relatively simple. I could really use some help 
> to set me straight and I would be very grateful.
> 
> My study area is Duncan Down in Whitstable, UK. I have attempted to 
> geo-reference a hi-res image of this site from Google Earth. 
> I want to over lay this with a grid to represent quadrats for vegetation 
> mapping and random sampling. 
> I'll use images taken from these stages to include in  my methods section of 
> my MSc dissertation/thesis
> 
> My problems are: 
> 
> That, in georeferencing the google earth image (with the georeferencing tool) 
> I have been able to get it to line up  just about right with the openlayers 
> google earth plugin visualisation. I do this by entering coordinates gained 
> from google earth manually into the georeferencer. 
I hope you are using the Google Earth Image just for visualisation.  They are 
not good for any kind of spectral analysis.


> Unfortunately when I go to create a vector grid (via research tools) a pop-up 
> tells me the CRS for the raster (I am creating the grid for, the study site) 
> and the project are different. I can get it to create a grid but it is always 
> rectangular rather than square. I understand that this might be a result of 
> on-the-fly CRS transformation. I'm not sure whether this is somehow incorrect 
> or will affect my ability to properly map GPS points gained in the field 
> work. 

Yes, if your project is in long /lat, the grid will be a rectangle and not a 
square unless you are on the equator.
> The project is WG 84 / Pseudo Mercator EPSG: 3857 and the raster is WG 84 / 
> Pseudo Mercator EPSG: 4326. When they are like this they are aligned. When I 
> change the CRS for the raster to match the project (e.g. from 4326 to 3857)  
> it ends up being transported to the somewhere else off the coast of South 
> America! And, it is very skewed. 
You cannot just change the CRS.  You need to reproject the raster.  To do that, 
use gdal warp in the raster menu.  Just changing the crs in the layer is only 
good if you have made an error and want to correct that (for example, change 
the utm zone).
> 
> 
> I feel like I am trying to do a simple thing here and it's going wrong at 
> every turn
> 
> Kind and hopeful regards, 
> 
> Alex
> 
> 
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Re: [Qgis-user] Problem with Using Google maps -Showing the points not exactly after exporting as a pdf or png

[Nicolas Cadieux]

Hi,

This is a well know issus with this plugin.  The easiest way is to zoom on the 
area and to save the image (save as image). Pan and zoom and do this a few 
times.  Then open these images in Qgis.  Keep in mind that there are 
limitations on the use of Google Earth images. I wonder if this error is 
intended to discourage people from printing the images...

Nicolas

> Le 16 nov. 2016 à 05:21, much_milk [via OSGeo.org] 
>  a écrit :
> 
> Hello,
> 
>  
> 
> i have a big problem with the exposition of  the point-shapes in context with 
> openlayers plugin cards via google earth.
> 
>  
> 
> The programm showes me every point in the right place (no matter which view) 
> but when i export the layout as a pdf or png the points are not on the same 
> place where they hast o be.
> 
>  
> 
> I’m still go mad!
> 
>  
> 
> Where is the error or what make i wrong??
> 
>  
> 
> Thanx a lot !
> 
>  
> 
> Bernd
> 
>  
> 
>  
> 
>  
> 
> 
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Re: [Qgis-user] MapInfo to QGIS style generator ; error message

[Nicolas Cadieux]

Hi,

I have not used this in a while now but the first step, if I remember is to 
export the object style from the .tab into a new field.  
This is done in Mapinfo.  Have you done this step?

Nicolas


> Le 15 nov. 2016 à 19:37, dandrigo [via OSGeo.org] 
>  a écrit :
> 
> Good morning, 
> 
> I'm working on windows 10 with mapinfo 16, qgis 2.16.3. 
> 
> I tried to use the usefull following plugin called "MapInfo to QGIS style 
> generator": 
> 
> https://github.com/NathanW2/MapInfo-to-QGIS-style-generator/wiki/Using-MapInfo-to-QGIS-style-generator.
>  
> 
> But when i launch this following command via osgeo4w shell : 
> 
> python mapinfoToQgis.py F:\temp\commerces.TAB F:\temp\out.qml -c 
> ID_SYMBOLOGIE --UseMapInfo 
> 
> An error message appears. I send you the attachment showing the error 
> message. 
> 
> 
> 
> Could you throw light for me regarding the meaning of the error message and 
> could youhow to help me in order to find a solution? 
> 
> In advance, thank you very much. 
> 
> If you reply to this email, your message will be added to the discussion 
> below:
> http://osgeo-org.1560.x6.nabble.com/MapInfo-to-QGIS-style-generator-error-message-tp5295947.html
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Re: [Qgis-user] Rotate Feature changes shape

[Nicolas Cadieux]

Hi,

Is your file CRS in degrees and your triangle made to 3 points?  If so, make 
the file in a layer that uses a CRS that uses meter, like a UTM zone 18, then 
densify the geometry. This will add points along the line  of the triangle.  
There is a tool for that. Make sure the project CRS is the same as your file 
CRS.

Nicolas

> Le 11 nov. 2016 à 20:14, Thomas Stanley-Jones [via OSGeo.org] 
>  a écrit :
> 
> In QGIS 2.18.0, when I rotate a rectangle, the shape changes.  If it's a 
> horizontal rectangle, when it's rotated vertical, the width is cut in 
> half and it's twice as long.  When it's rotated to an angle in between 
> horizontal or vertical, the shape changes to a parellelogram.  But if I 
> rotate it to it's original position, the shape returns to normal.   
> Something is wrong with the math in this tool (Rotate Feature(s)). 
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Re: [Qgis-user] Plea for help with monochrome maps for publication

[Nicolas Cadieux]

Hi,
There is no easy way.  The colours on the screen will never be as the colours 
on print even with a screen calibration (but it would help if you can calibrate 
the screen with the printer).  I normally deal with the publisher or the 
printer directly.  You can ask for a recommended colour palet.  That can help. 
You can also add a cd to the book with colour images. 
Nicolas

> Le 11 nov. 2016 à 12:26, David Addy [via OSGeo.org] 
>  a écrit :
> 
> Most of us prepare our maps using colours for different outlines or different 
>  colour shades of fill for polygons. However, there are still occasions where 
> maps produced for publication in books or magazines will end up as shades of  
> grey  to save the cost of colour printing. This is certainly the case for 
> most of the local history texts for which I am often asked to make maps. 
> This can result in greys which are fairly indistinguishable from each other, 
> and traditionally this issue was approached by adding hatchings to the 
> ‘colour’. This could end up as looking a mess and/or failing to adequately 
> highlight an area of highest activity in distribution maps. 
> Has anybody got any experience of, or advice for,  successfully solving the 
> problem of making monochrome maps look more attractive and useful? 
> 
> 
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Re: [Qgis-user] Spatial resampling of a point vector layer using QGIS

[Nicolas Cadieux]

Hi Giacomo.

You can access gdal_grid from qgis. (Raster menu).  Use the moving average 
algorithm. 
 If it's not there, you may need to modify the gdal command line by pressing 
the yellow pencil.

http://www.gdal.org/gdal_grid.html#gdal_grid_algorithms_average

Nicolas

> Le 10 nov. 2016 à 17:48, Giacomo Fontanelli-2 [via OSGeo.org] 
>  a écrit :
> 
> 
> down vote
> favorite
> I have a vector layer with points located on a regular square grid of 2Km. 
> The layer has a column with a numeric value (crop yield) for each point.
> 
> I would like to resample the vector to a grid of 1Km, and the new points 
> should have the crop yield value represented by the average of the 4 points 
> surrounding.
> 
> I would like o use QGis.
> 
> Thank you for your suggestions
> 
> 
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Re: [Qgis-user] Error when running a simple raster filter

[Nicolas Cadieux]

Hi,
Not sure why you are getting this specific error.  Just try running it is Saga. 
 It's already installed with QGIS. Saga is easy to use.

 Is this the first time you have installed QGIS or did you have a previous 
version installed?

Did you have a 32bit install before?
Nicolas

> Le 10 nov. 2016 à 06:14, Jill Campbell [via OSGeo.org] 
>  a écrit :
> 
> Hi, I am a new starter on QGIS and would like some instructions to resolve a 
> problem.
> 
> I am following a tutorial (QGIS for Archaeologists - a basic guide) and 
> trying to 'de-trend' a LIDAR map.
> 
> When I run the sequence:
> Processing: toolbox, geoalgorithms, filter tools, simple filter run
> 
> I get an error message: 'Can't load requested DLL 
> c:\progr~1\QGIS2~1.18\apps\saga\dll\gdal_MrSID.dll
> 
> I am running QGIS 2.18 Las Palmas which I downloaded from the QGIS website 
> about 3 weeks ago (64-bit version). When I look at my programme files I have 
> the file and pathway 'apps\saga\dll\gdal_MrSID.dll'. I.e the required file 
> seems to be there but not running for this procedure.
> 
> Guidance would be appreciated.
> 
> Jill
> 
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Re: [Qgis-user] Combining modern maps with old maps

[Nicolas Cadieux]

Hi,
As an archaeologist, I do that a lot.  You will need to scan the map to create 
a .tiff. The you use the qgis georeferencing plugin to place the map in the 
correct spot.  

http://www.qgistutorials.com/en/docs/georeferencing_basics.html
This should help.  Also look at the qgis documentation.  
http://docs.qgis.org/2.14/en/docs/user_manual/

If you overlap polygons or two rasters, play with the layer rendering and 
transparency found in the layer properties. 

Cheers
Nicolas

> Le 10 nov. 2016 à 06:22, Pat Hin [via OSGeo.org] 
>  a écrit :
> 
> Hello guys 
> 
> i am a private researcher who is analyzing where some former old 
> buildings has been 
> most surely been located. 
> For that of course i have sometimes just a very old map (sometimes a 
> picture or a scan). 
> 
> How would be the best way to "overlap" this with a modern map like OSM. 
> I am sure i have to create two layers and the layer for the modern map 
> is easily to do 
> with the plugins. 
> But how to process the "old" map the best way: would do you recommend to do? 
> 
> many thanks 
> 
> pat 
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Re: [Qgis-user] Stopping Program Redraw

[Nicolas Cadieux]

Hi,
Have tried killing the rendering of the layer? There is a small button on the 
lower right for that.  It should work for you.

Nicolas

> Le 8 nov. 2016 à 01:11, Grant Boxer [via OSGeo.org] 
>  a écrit :
> 
> Is it possible to stop QGIS when it is trying to draw a layer, in which there 
> is a problem, and it stops responding? The only way I have found is to crash 
> out of the program.
> 
>  
> 
> Grant Boxer
> 
> Perth, Western Australia
> 
>  
> 
> 
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Re: [Qgis-user] Feedback re future of core c++ plugins in QGIS 3.0

[Nicolas Cadieux]

Hi Nyall,

Very interesting.  I have a few comments. Where would go If I wanted to 
encourage more the development of the the new raster calculator for qgis 3 (one 
that is  multithreaded, GPU enabled and huge raster ready)? This is a real game 
stopper for using qgis with Lidar data.   I have help with the bugs but can I 
do more?

I see that lots of stuff below is moved to the processing plugin. I have been 
continually having problems with this in a multiple user environment where I am 
stuck deleting the processing plugin folder for every user in a machine every 
time I do an install.  That means that if 6 users have use a single machine, I 
need to delete the processing folder 6 times as more often then not, I end up 
with old and new versions of the processing algorithms on the same computer.  
Are you planing to change this or to have some kind of version checker when a 
users run Qgis after an update?

It also would be nice to do QGIS update from within QGIS and the option to 
export QGIS to a USB key (without having to change a big bunch of variables). 
That would make it easier for I user that do not have admin rights.

Nicolas


> Le 7 nov. 2016 à 20:24, Nyall Dawson [via OSGeo.org] 
>  a écrit :
> 
> Hi all, 
> 
> Discussion is currently underway concerning the future of a number of 
> the plugins which come preinstalled with QGIS. 
> 
> This concerns the plugins: 
> 
> - coordinate capture 
> - evis 
> - geometry_checker 
> - georeferencer 
> - heatmap 
> - interpolation 
> - offline editing 
> - oracle raster 
> - raster terrain analysis 
> - road graph 
> - spatial query 
> - topology checker 
> 
> If you're an active user of any of these plugins, your feedback would 
> be greatly appreciated. You can join the discussion over at: 
> 
> https://github.com/qgis/qgis3.0_api/issues/67
> 
> Note that a number of preinstalled plugins have already been removed 
> in 3.0 - specifically: 
> 
> - geometry snapper: was generalised to work with all layer types and 
> moved to a processing algorithm 
> - zonal statistics: was moved to a processing algorithm 
> - dxf2shp converter: was removed from QGIS - this conversion is better 
> handled outside of QGIS, eg by using OGR tools directly. 
> 
> Nyall 
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