Re: [Qgis-user] Graticules in QGIS 2.0
Hi Carlos and Lester, I have managed to get both a lat - lon graticule grid and a metric scale bar onto the same map in the composer. It is relatively straight forward. Set your map up in the composer with the on the fly projection set to WGS84 Geographic. Add your graticules as per your own style and design. Lock the map, make sure your map is complete with all legends text etc added and complete. Now add another map to the composer adjacent to your map canvas, Make sure the size (length and breadth) is exactly the same as your canvas map. Now go back to QGIS and change the projection properties to your desired projection. Back in the composer, select the map you just added and click set to map canvas extent. Your second map should now be at the same extent as the first map except it is now projected. All you have to do now is add a scale bar on this map and transfer it to the map with the graticules. This is a bit of a work around and requires that you are very careful with how you set things up. Let me know if this does not make sense, it works for me. Regards, Wesley On Thu, Jan 23, 2014 at 3:09 PM, Carlos Cerdán sig.up...@gmail.com wrote: Hi Lester: The way I do it is to set the SRC in Lat-Long and activate on the fly trnasformation. The bad news are that you can't get a metric scale bar, not yet in this version (2.0.1), so +1: I would like this option. Regards Carlos Cerdan 2014/1/23 Lester Anderson arctica1...@gmail.com Hello, I was wondering if it is possible to generate projected Lat-Long graticules for non-geographic projections (eg Lambert, Sterographic etc) within the print composer? If not, is this going to be an option in a later version? Cheers Lester ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w I hear...I forget I see...and I remember I do...and I understand Ancient Chinese Proverb ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] QGIS - Georeferencer PDF Report RMSE Values
Dear Qgis users, I have used the Georeferencer plugin in QGIS to undertake some image to image matching on a set of Landsat Images. I am using the output as part of a report and need some information about how the RMSE values are created and what they refer to. My Landsat imagery is in UTM 35S projection WGS84. The total RMSE values returned range from 0.04 to around 0.2. My question is as follows Where are the RMSE values measured from top-left, bottom-right, across the diagonal of the pixel? I cant seem to find any explanation of where these values are calculated from. Many thanks, Wesley -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w I hear...I forget I see...and I remember I do...and I understand Ancient Chinese Proverb ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS - Georeferencer PDF Report RMSE Values
Many thanks Saulteau, That is helpful. On Thu, Nov 28, 2013 at 5:53 PM, Saulteau Don sault@gmail.com wrote: I found an explanation of RMSE from this GIS.se question, but not sure how QGIS does it (I can't read source code yet =P) An Explanation of RMSE for Dummies http://gis.stackexchange.com/a/2/1297 On Thu, Nov 28, 2013 at 2:54 AM, Wesley Roberts jwesrobe...@gmail.com wrote: Dear Qgis users, I have used the Georeferencer plugin in QGIS to undertake some image to image matching on a set of Landsat Images. I am using the output as part of a report and need some information about how the RMSE values are created and what they refer to. My Landsat imagery is in UTM 35S projection WGS84. The total RMSE values returned range from 0.04 to around 0.2. My question is as follows Where are the RMSE values measured from top-left, bottom-right, across the diagonal of the pixel? I cant seem to find any explanation of where these values are calculated from. Many thanks, Wesley -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w I hear...I forget I see...and I remember I do...and I understand Ancient Chinese Proverb ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w I hear...I forget I see...and I remember I do...and I understand Ancient Chinese Proverb ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Android GPS streaming to QGis
Thanks Giovanni and Zoltan, We make use of Android devices for work in Zambia and have been navigating using an app called BackCountry Navigator. These options may provide a nice alternative. Regards, Wesley On Thu, Sep 5, 2013 at 9:26 AM, G. Allegri gioha...@gmail.com wrote: You need to bridge your Android device and something that emulate a serial port device for your laptop. I don't have experience with them, neither I know if open source solutions are available, but there are various solutions on the market, many of them using Bluetooth as the transmission mean between Android and the PC. Recently I heard about BlueNMEA and GPSDirect (this one for Windows and free only for non-commercial use). giovanni 2013/9/4 Zoltan Szecsei zolt...@geograph.co.za Hi Guys, Does anyone know of an app whereby I can link my Android phone to a laptop running QGis, and have QGis read the GPS coords in realtime, and track the position on a displayed image? Rather like a normal car GPS, but using the GPS in my Android phone, and tracking my position on my vectors and images that are being displayed in QGis. TIA, Zoltan -- ==**= Zoltan Szecsei PrGISc [PGP0031] Geograph (Pty) Ltd. P.O. Box 7, Muizenberg 7950, South Africa. 65 Main Road, Muizenberg 7945 Western Cape, South Africa. 34° 6'16.35S 18°28'5.62E Tel: +27-21-7884897 Mobile: +27-83-6004028 Fax: +27-86-6115323 www.geograph.co.za ==**= __**_ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/**mailman/listinfo/qgis-userhttp://lists.osgeo.org/mailman/listinfo/qgis-user -- Giovanni Allegri http://about.me/giovanniallegri blog: http://blog.spaziogis.it GEO+ geomatica in Italia http://bit.ly/GEOplus ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] [Qgis-developer] Synergy of QGIS Enterprise and QGIS 2.0/Master branch
While everyone is helping sourcepole rename their software, here is my 2 cents Enterprise QGIS by Sourcepole On Fri, Jul 5, 2013 at 12:55 PM, Chris Berkhout chrisberkh...@gmail.comwrote: I'm happy for companies to do whatever they want (and are allowed) to do. As for the QGIS project having a stable branch, I think it's treating the symptoms rather than the cause. I'd much rather see the effort that that might consume be put into making the main branch more stable. With a strong test suite regressions can become very rare, even with constant development of new features. I'm fairly new to QGIS, so I can't speak with a full understanding of the current situation. I just wanted to share my hopes for the future of the project. Cheers, Chris On Fri, Jul 5, 2013 at 7:13 PM, Werner Macho werner.ma...@gmail.comwrote: Hi! My suggestion to solve that kind of problems would be to just have a something|. based on QGIS but I appreciate the appearance of the enterprise QGIS and hope that it will QGIS itself some push to be more known by companies .. regards Werner On Fri, Jul 5, 2013 at 11:07 AM, Giuseppe Sucameli brush.ty...@gmail.com wrote: Hi all, On Fri, Jul 5, 2013 at 9:13 AM, Pirmin Kalberer pi...@sourcepole.com wrote: Pirmin what happens if / when QGIS project itself wants to release QGIS Enterprise version - or another company? Maybe it would be better to call it 'Sourcepole GIS' or something to make it clear that it is not an official QGIS product but an official Sourcepole product? I think a completely different name of a new GIS which is very similar to QGIS could be more confusion than one or many QGIS variants. I agree with Pirmin, a product with a completely different name sounds like a new GIS software. In addition, not keeping the relation with the QGIS project may damage the project itself in the long run. Why do not put the company name in the front, something like Sourcepole QGIS Cloud/Enterprise? This makes everything more clear and allows others companies, but mainly the QGIS project itself, to create its own version. Just my 2 cents. Also (out of curiosity) what is to stop one of your clients cloning the private source tree that you provide and then making that publicly available - or just pushing it back in to the mainstream QGIS tree? i.e. do you realise any real long term benefit from keeping the tree private in the first place? We didn't think a lot about publishing our source code branch, yet. So this could happen anytime. The question why clients do not publish sources of commercial FOSS software is hard to answer. Maybe it's a question of loality? Regards Pirmin [1] http://en.wikipedia.org/wiki/Commercial_open_source_applications On Mon, Jul 1, 2013 at 2:50 PM, Nathan Woodrow madman...@gmail.com wrote: On Mon, Jul 1, 2013 at 9:25 PM, Yves Jacolin (Free) yjaco...@free.frwrote: My understanding is that it is a commercial service, so you don't have any licence. No. It's still GPL. Any support docs, or training sourcepole provide however are not. Only the QGIS software bit part - Nathan ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Pirmin Kalberer Sourcepole - Linux Open Source Solutions http://www.sourcepole.com ___ Qgis-developer mailing list qgis-develo...@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer -- Giuseppe Sucameli ___ Qgis-developer mailing list qgis-develo...@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How should the Scalebar unit settings affect?
Which version of QGIS are you using? I notice you have been posting about the new print composer on your blog and was wondering if you were using a new version of QGIS. I have a method but it is a little bit of a hack / work around using two maps on the print composer. I don't have time now to explain but if you don't find a solution I will see what I can send you. Briefly, add a second map to your print composer once your main geographic / wgs84 map is complete (except for the scale bar), make sure it is the same size as your original (width and height). Lock the layers etc for your main geo map. Now, go back to your QGIS main window and change the projection (bottom right corner) to your projected coordinates, DONT change the extent. Once this is done go back to your second map (in the print composer) and update the extents of the map. Now add a scale bar to the projected map window and select the units etc. If all goes well you can now use the projected scale bar on your original map. My explanation is a little dodgy, hope you can make sense of it. Wesley On Tue, Apr 2, 2013 at 2:48 PM, Anita Graser anitagra...@gmx.at wrote: Hi, I'm testing the current scalebar in Print Composer. What I'd like to achieve is a map in WGS84 with a scalebar in meters. The available settings suggest that it's possible: I can change between map units, meters and feet. Unfortunately, changing between map units and meters seems not to affect the output. Changing to feet makes the scalebar shorter. I have on-the-fly reprojection on. The project CRS is WG84 and the layer's CRS is a local projected CRS. I couldn't find a related ticket. Can you confirm? Best wishes, Anita __**_ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/**mailman/listinfo/qgis-userhttp://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Raster calculator
Hi Hanlie, I too have found interesting results returned by the raster calculator and usually default to loading the data into GRASS and processing it there. I suspect you may need to convert your input data to *.tif format for the equation to work in QGIS. This is easily done using gdal_translate or the gdal_translate implementation in QGIS - Raster/Conversion/Translate Not sure why you are having trouble with the ASC files, perhaps the conversion will do the trick Regards, Wesley On Wed, Feb 20, 2013 at 10:24 PM, Hanlie Pretorius hanlie.pretor...@gmail.com wrote: Hi, If there's a way to search the whole archive of this list in one go, please let me know. Otherwise, can someone perhaps help me with this problem? I'm using the raster calculator in QGIS 1.8.0 on Windows 7 to find the difference between two rasters. The two input rasters (ASC files) both have float32 datatypes and they have exactly the same spatial extent. The expression I use in the calculator is: med input@1 - low input@1 *med input* has a range from 0 to 5.5 *low input* has a range from 0 to 2.5 The result I get is a float32 output raster with zero everywhere. I have tried two different output formats - TIFF and IMG with the same result. I have also tried to add the two rasters, with the same result - zero everywhere. I imported the input rasters into GRASS, performed the calculation, got the correct result, and exported the output successfully to a TIFF file. Can anyone help me figure out why the raster calculator in QGIS is not giving the expected result? Thanks Hanlie ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] i.vi not available in QGIS wiith grass tools enabled
Hi All, I am interested in calculating some vegetation indices from Landsat imagery. I see that grass gis has a i.vi tool which calculates several indices of interest. This application is not available from the grass GIS plugin using QGIS 1.8. Will I need a more updated version of grass to make use of this tool? I have version 6.4 running on Ubuntu 12.04 and windows 7 64bit. Should I install GRASS GIS version 7? Many thanks and kind regards, Wesley -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Split polygon using area and DEM
Hi Victor, Many many thanks for your help on this matter. I have generated a harvesting plan using contours and buffers in a similar way to the method you proposed. I will however use your method in the future as it appears to be a little more semi-automated when compared to my approach. A quick question, if I use your method and want to split up each contour such that its size is around 5 ha, would I be able to do this using an 'out-of-the-box' module in sexxtante? Once again, many thanks! Wesley On Thu, Jan 31, 2013 at 10:30 PM, Victor Olaya vola...@gmail.com wrote: Wesley I took sometime to write a small tutorial about how to solve this problem you propose using QGIS and SEXTANTE. You can find it in [1]. I hope you find it useful (and that I understood your problem correctly...) Regards Victor [1] http://qgissextante.blogspot.fr/2013/01/dividing-in-equal-area-zones.html 2013/1/30 Wesley Roberts jwesrobe...@gmail.com: Dear Colleagues, I am tasked with defining harvesting strips for a community forest in Zambia and am struggling to find a suitable solution. Our approach uses the coop and shelter belt (harvest alternative strips of forest) method and requires that our area be split into 5 ha blocks. I understand how to make a grid of 5 ha blocks, however, we have a topography issue. Our site is located in some pretty hilly areas so we want to harvest along contours to avoid soil erosion issues. I am looking for a quantitative approach to portioning our site up into 5ha blocks that run along contours. I have access to QGIS and R as well as any other FOSS available. Do any of the Qgis users have a suggestion with regards to a suitable approach? Many thanks, Wesley -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Split polygon using area and DEM
Dear Colleagues, I am tasked with defining harvesting strips for a community forest in Zambia and am struggling to find a suitable solution. Our approach uses the coop and shelter belt (harvest alternative strips of forest) method and requires that our area be split into 5 ha blocks. I understand how to make a grid of 5 ha blocks, however, we have a topography issue. Our site is located in some pretty hilly areas so we want to harvest along contours to avoid soil erosion issues. I am looking for a quantitative approach to portioning our site up into 5ha blocks that run along contours. I have access to QGIS and R as well as any other FOSS available. Do any of the Qgis users have a suggestion with regards to a suitable approach? Many thanks, Wesley -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: +27(0)83 5355 646 skype: roberts-w ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] orthorectification in QGIS
Hi Luis, I am not sure if QGIS has built in orthorecitification functionality (perhaps there is a plugin you can use?). There is however a other open source software package called OTB which I am sure has orthorectification functionality ( http://www.orfeo-toolbox.org/SoftwareGuide/SoftwareGuidech11.html) I know that there is an OTB plugin for QGIS but am not sure what it allows you to do as I have not made use of it yet. With regards to a DEM, your first point of call is the CGIAR version 4 Shuttle Radar Topography DEM available here (http://srtm.csi.cgiar.org/), remember however that this product has a spatial resolution of 90 meters so if you are using very high resolution data you may want to generate your own DEM or at least use one provided by your national mapping agency. Hope this helps, Wesley On Wed, Oct 17, 2012 at 12:15 PM, Luis Lisboa luislisboa1...@gmail.comwrote: Greetings, I have used QGIS for displauying and visualization but now I will need to orthorectify a few satellite images. My question is: is there any QGIS function for this? If Yes, where can I find it? And, additionally, does it already include a DEM product? Thank you Luis ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: 083 5355 646 Work: 021 - 888 2490 skype: roberts-w ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Fwd: Can't add kml-file to QGIS
Hi Johan et al, I have had the same problem in the past. I emailed the developer but have not had a reply. Our workaround involved exporting as a gpx file and using that. I think that the problem lies with additional xml data within the kml relating to the time of data capture. Use GPX when you export from GPS Essentials. HTH, Wesley On Thu, Sep 20, 2012 at 8:37 PM, Johan Nilsson joni8...@gmail.com wrote: Sorry, I just mailed to André and not the list. I don't know why...but here it come. -- Forwarded message -- From: Johan Nilsson joni8...@gmail.com Date: 2012/9/20 Subject: Re: [Qgis-user] Can't add kml-file to QGIS To: Andre Joost andre+jo...@nurfuerspam.de 2012/9/20 Andre Joost andre+jo...@nurfuerspam.de Am 20.09.2012 14:06, schrieb Johan Nilsson: I have exported some track-logs from a Android app called *'GPS-Essential'* and I can add them to Google map and to Google Earth. But when I triy to add (Layer--Vector Layer to QGIS i get this message: /home/joni/GIS/GPSE/kml/Track-**09_19_12 11_42_21.kml is not a valid or recognized data source Can you open the file with a text editor? Qgis does not like folders with mixed content (points, lines and/or polygons). Furthermore, ExtendedData tags can not be read. The strange thing was that some kml-files was able to open but not all (but everyone in Google Maps. Yes. I opened with gedit, a text-editor and find that they had different structure. The one that was able to open,, separate the xyz with comma/space separation: *]]/descriptionstyleUrl#track/styleUrlMultiGeometryLineStringcoordinates17.585611,59.838646,31.4 17.585642,59.8386,31.0 17.585693,59.838562,31.3 17.585735,59.838512,36.4 17.585785,59.83847,37.8 17.585827,59.838425,34.8 17.585857,59.83837,34.9 17.58585,59.838303,35.3 17.585823,59.838257, * and the ones I could not open have this: ...gx:coord17.673456 59.870106 16.6/gx:coordgx:coord17.673555 59.87012 16.9/gx:coordgx:coord17.673653 59.870136 16.6/gx:coordgx:coord17.67375 59.870148 16.6/gx:coordgx:coord17.673853 59.87016 17.2/gx:coordgx:coord17.673935 59.870182 18.7 I will ask the developer about this..If he have change, or If i have exported in different ways. I'm totally new to use SQL/relations databases with ArcGIS and QGIS, and are just now trie to learning. I assume that sqlite lack Are there any other tools to convert to for instance shape-files. GPS-Essential save their data in a sqlite-file, so I can export from asql-manager to. I don't know how I open a sqlite db in QGIS either. Just as simple as Add new spatialite layer, if it is a spatialite sqlite database. Otherwise it would be a non-spatial layer. You can try Qgis DB Manager to look inside the database. the sqlite seems to lack spatial data, even if there are coordinates. Will try to learn more about this... Has GPS-Essential any other output options? I would assume GPX, beeing standard in GPS data exchange. At least Google Earth does IIRC. Another thing was that the kml-files that opened was not placed right with my background map (RT90 2,5 gon V (metric coordinate system) despite I checked 'on the fly reprojection' and I thougt all kml was in WGS 84 by default. /Cheers Greetings, André Joost __**_ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/**mailman/listinfo/qgis-userhttp://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Dr Wesley Roberts jwesrobe...@gmail.com Cell: 083 5355 646 Work: 021 - 888 2490 skype: roberts-w ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
