Re: [Qgis-user] Why no proper QGis Windows installer yet?
Michael Toews ha scritto: On the topic of GRASS, I'm not sure exactly where the difficulties are, but I'm wondering if GRASS support is really needed for a standalone QGIS installer? From what I understand, QGIS doesn't actually require GRASS at all, except that certain plug-ins do require GRASS. Omitting GRASS from a standalone QGIS installer would cut down the complexity and size of both the installer and installation on host computer. If GRASS functionality is required by a Windows user, then a OSGeo4W should be recommended. We had a poll a while back, and it turned out that the majority of QGIS users used the GRASS plugin. -- Paolo Cavallini: http://www.faunalia.it/pc ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Point sampling tool
Borys, First at all, many thanks for your Point Sampling Tool that we use a lot over here. I'm now running it for 5000 points and 10 layers on my tiny eee pc and is taking a while. I was thinking perhaps printing every layer for every point is making it run much slower? Agus begin:vcard fn:Agustin Lobo n:Lobo;Agustin org:Institut de Ciencies de la Terra Jaume Almera CSIC adr:;;Lluis Sole Sabris s/n;Barcelona;;08028;Spain email;internet:agustin.l...@ija.csic.es url:http://www.ija.csic.es/gt/obster version:2.1 end:vcard ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] projecting and un-projecting
Carson and Magnus, thank you for answering. When I load this shapefile into QGis, the CRS dialog indicates that it is EPSG code 4326 : (+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs ). That is the default value set in QGis preferences for layers that don't have projection information, and not the same as the information in the .prj file. Apparently the .prj file is not being read?? When I load the shapefile into R using readOGR(), I get: proj4string(nycb) [1] +proj=lcc +lat_1=40.66 +lat_2=41.03 +lat_0=40.16 +lon_0=-74 +x_0=30 +y_0=0 +ellps=GRS80 +datum=NAD83 +to_meter=0.3048006096012192 +no_defs +towgs84=0,0,0 In both QGis and R, the shapefile displays in the projected coordinate system, not lat/long. bbox(nycb) min max r1 912287.1 1067382.5 r2 116411.4 273617.8 I have since learned how to use spTransform() in R to convert to lat/long, i.e., new - spTransform(nycb , CRS( +proj=longlat +ellps=GRS80 +datum=NAD83 +no_defs +towgs84=0,0,0)) bbox(new) min max r1 -74.25875 -73.70001 r2 40.48608 40.91766 Going back to QGis, after that little side trip to R: I tried saving to EPSG code 4269 (+proj=longlat +ellps=GRS80 +datum=NAD83 +no_defs), but it had no effect that I can see. For example, I load the saved shapefile into QGis, and it overlays exactly on the original. Note that what Carson suggested is the same as what I used in R's spTransform(), except for the +towgs84 string. At this point I'm at a loss... -Don At 8:37 PM + 3/25/09, Carson Farmer wrote: Hi Don, I would like to be able do the reverse operation. That is, unproject this shapefile and use the Save as Shapefile dialog to make a copy that is in lat/long. Just search by name in the projection selection dialog for nad83, and I think you'll find the projection you're looking for... which is likely: epsg 4269. Now you should be able to do the same as before, but you will be changing to a geographic CRS, namely, NAD83... Hope that helps... Carson -- Carson J. Q. Farmer ISSP Doctoral Fellow National Centre for Geocomputation (NCG), John Hume Building, National University of Ireland, Maynooth, Co. Kildare, Ireland. Phone: +353 (0) 1 708 6726 Fax: +353 (0) 1 708 6456 Email: carson.far...@gmail.com Web: http:// www. carsonfarmer.com/ http:// www. ftools.ca/ At 10:58 PM +0100 3/25/09, Magnus Homann wrote: Don MacQueen skrev: I would like to be able do the reverse operation. That is, unproject this shapefile and use the Save as Shapefile dialog to make a copy that is in lat/long. When you save the shapefile, save it to the WGS 84 projection (i.e. CRS). EPSG code is 4326. I hope that helps! Magnus -- -- Don MacQueen Environmental Protection Department Lawrence Livermore National Laboratory Livermore, CA, USA 925-423-1062 -- ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] question on Ftools - polygon centroids
Hi, I have a question on the ftool-plugin, and more specifically the geometry tool polygon centroids. I find this tool very useful. However, when I use it, quite regularly a few points get the X or Y (or both) coordinates transformed to negative numbers, instead of x = 1234567 I get x = -1234567. Is this a known bug? Is there any way to prevent this? Can I edit the coordinates manually to fix this? I use Qgis 1.0.1_Kore in Ubuntu 8.04lts, I have also experienced the error in Qgis for Windows. The coordinate system in use is Sweref99 TM. thanx / Fafner -- View this message in context: http://n2.nabble.com/question-on-Ftools---polygon-centroids-tp2540371p2540371.html Sent from the qgis-user mailing list archive at Nabble.com. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] projecting and un-projecting
Don, When I load this shapefile into QGis, the CRS dialog indicates that it is EPSG code 4326 : (+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs ). That is the default value set in QGis preferences for layers that don't have projection information, and not the same as the information in the .prj file. Apparently the .prj file is not being read?? Yes, a bug (that has recently been fixed in trunk) causes non-recognised CRS' to be ignored... so really, you have two options... to manually adjust the .prj of your shapefile to match one of the ones specified in the QGIS database, or two, find the correct CRS using fTools 'define current projection' tool to overwrite it automatically... Or you can wait for the new release where this probably won't be a problem... When I load the shapefile into R using readOGR(), I get: proj4string(nycb) [1] +proj=lcc +lat_1=40.66 +lat_2=41.03 +lat_0=40.16 +lon_0=-74 +x_0=30 +y_0=0 +ellps=GRS80 +datum=NAD83 +to_meter=0.3048006096012192 +no_defs +towgs84=0,0,0 Which means R loads the .prj file properly... Going back to QGis, after that little side trip to R: I tried saving to EPSG code 4269 (+proj=longlat +ellps=GRS80 +datum=NAD83 +no_defs), but it had no effect that I can see. For example, I load the saved shapefile into QGis, and it overlays exactly on the original. Wait, let me get this strait... after transforming the layer in R, you saved it to file, and loaded this is QGIS, and it did not recognise the projection? Is this correct? Perhaps you could describe your exact steps from within R onwards? Carson ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] question on Ftools - polygon centroids
Hi Fafner, I have a question on the ftool-plugin, and more specifically the geometry tool polygon centroids. I find this tool very useful. However, when I use it, quite regularly a few points get the X or Y (or both) coordinates transformed to negative numbers, instead of x = 1234567 I get x = -1234567. Is this a known bug? Is there any way to prevent this? Can I edit the coordinates manually to fix this? This is a known bug, and it will be fixed in a future version of fTools, however, no simple fix (that I know of) exists yet. It likely only happens with certain projections... I'll try to come up with a temporary fix in the mean time... Sorry for the inconvenience, Carson -- Carson J. Q. Farmer ISSP Doctoral Fellow National Centre for Geocomputation (NCG), John Hume Building, National University of Ireland, Maynooth, Co. Kildare, Ireland. Phone: +353 (0) 1 708 6726 Fax: +353 (0) 1 708 6456 Email: carson.far...@gmail.com Web: http://www.carsonfarmer.com/ http://www.ftools.ca/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Simple question
Hello, I am new at QGIS, I want to know if the measuring tool in QGIS can measure in meters instead of degrees. Where do I change this? Thank you for your help, Sebas ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Simple question
Sebastian Cruz wrote: I am new at QGIS, I want to know if the measuring tool in QGIS can measure in meters instead of degrees. Where do I change this? Sebas Hi Sebastian, IF you are using a projection which is in meters, go to: Settings / Project Properties / General (tab) Set Map units part to 'Meters' (and the goo Hope this helps? Regards, Richard Duivenvoorde ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Why no proper QGis Windows installer yet?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi Agustin Agustin Lobo wrote: I personally use linux but have had to pay attention to Qgis running on Windows (and recently on Mac) because most students are using Windows (and, even worse, vista). But I must say that I feel a bit guilty for this. Somehow I feel that there is a lot of very good brain time being devoted to deal with windows-related problems that could be much better invested on other things (including beach time). Therefore, I would prefer being able to push more my students towards linux, and this would be a good time as they are having so many problems with vista. I'm also teching people from many different countries (Brazil, Korea, India, USA...), so the impact would be no-negligeable. Nevertheless, I cannot do it. Why? because we still do not have ecw/mrsid support for binary linux installations of qgis, therefore cannot really tell my students that installing qgis for linux is going to be better than installing qgis for windows. I've said in this list many times that having ecw/mrsid support for binary linux installations of qgis is a major issue, perhaps not a sexy one for developpers, I can understand it. But, don't know, I must be wrong. Agus The campaign for ecw/sid support on linux is one that should be moved to the gdal list I think. We are dependent on whatever packages are available for a givin distro so it makes sense to me to try to get the gdal packagers to accommodate you here. Regards Tim Sutton - QGIS Project Steering Committee Member (Release Manager) == Please do not email me off-list with technical support questions. Using the lists will gain more exposure for your issues and the knowledge surrounding your issue will be shared with all. Visit http://linfiniti.com to find out about: * QGIS programming and support services * Mapserver and PostGIS based hosting plans * FOSS Consulting Services Skype: timlinux Irc: timlinux on #qgis at freenode.net == -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAknL8cEACgkQqk07qZdiYjd2lgCgsN1OnK4+0lpaA19fIK9i3bWA oAoAnidikpixS3xicS2iN5lT6PrsO1+7 =5yfO -END PGP SIGNATURE- ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] question on Ftools - polygon centroids
Fafner, Hi Carson thank you for the prompt reply, thanx also for your awesome work on the ftools. Your first email motivated me to come up with an interim solution (which might actually become the permanent fix) this evening. I will upload this fix to my repository tonight, and you should be able to run the centroids tool on pretty much any projection... Please test (should be version 0.5.8) and let me know if this problem is fixed. Cheers, Carson -- Carson J. Q. Farmer ISSP Doctoral Fellow National Centre for Geocomputation (NCG), National University of Ireland, Maynooth, Email: carson.far...@gmail.com Web: http://www.carsonfarmer.com/ http://www.ftools.ca/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Why no proper QGis Windows installer yet?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi Agustin Agustin Lobo wrote: I personally use linux but have had to pay attention to Qgis running on Windows (and recently on Mac) because most students are using Windows (and, even worse, vista). But I must say that I feel a bit guilty for this. Somehow I feel that there is a lot of very good brain time being devoted to deal with windows-related problems that could be much better invested on other things (including beach time). Therefore, I would prefer being able to push more my students towards linux, and this would be a good time as they are having so many problems with vista. I'm also teching people from many different countries (Brazil, Korea, India, USA...), so the impact would be no-negligeable. Nevertheless, I cannot do it. Why? because we still do not have ecw/mrsid support for binary linux installations of qgis, therefore cannot really tell my students that installing qgis for linux is going to be better than installing qgis for windows. I've said in this list many times that having ecw/mrsid support for binary linux installations of qgis is a major issue, perhaps not a sexy one for developpers, I can understand it. But, don't know, I must be wrong. Agus The campaign for ecw/sid support on linux is one that should be moved to the gdal list I think. We are dependent on whatever packages are available for a givin distro so it makes sense to me to try to get the gdal packagers to accommodate you here. Regards Tim Sutton - QGIS Project Steering Committee Member (Release Manager) == Please do not email me off-list with technical support questions. Using the lists will gain more exposure for your issues and the knowledge surrounding your issue will be shared with all. Visit http://linfiniti.com to find out about: * QGIS programming and support services * Mapserver and PostGIS based hosting plans * FOSS Consulting Services Skype: timlinux Irc: timlinux on #qgis at freenode.net == -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAknL8cEACgkQqk07qZdiYjd2lgCgsN1OnK4+0lpaA19fIK9i3bWA oAoAnidikpixS3xicS2iN5lT6PrsO1+7 =5yfO -END PGP SIGNATURE- ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] question on Ftools - polygon centroids
Please test (should be version 0.5.8) and let me know if this problem is fixed. Hi Carson, I just upgraded to 0.5.8 and in manage plugins it now says that ftools is incompatible and so cannot be activated. regards -- Giovanni -- ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] question on Ftools - polygon centroids
Oops, my bad, I think I deleted the minimum qgis version.. ok I'll upload in a minute... the version number won't change, but if you wait about 15 minutes you can try to download again... C ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
