Re: [Qgis-user] QGIS windows v's linux from a newbie perspective
Andreas Neumann: Storage space is so cheap nowadays that I store all of my data in tiffs. The price has come done, but I wouldn't call it cheap in Africa. A 1Tb NAS cost me the equivalent of three months groceries for my family. ECW is easy to compile on Linux. I never tried to compile MrSid. MrSid seems to becoming the standard format for government raster data here, so I self compile. Compiling on Ubuntu with MrSid libs is no big deal and the performance of the MrSid SDK is excellent, in my experience. Those that need ECW and MrSid and feel strongly against compiling themselves, should hire someone to do it for them. Craig ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Re: [Qgis-developer] Venue for next hackfest...Vienna?
Hi to all! I already mentioned .. It seems that there's no _must_ to do the hackfest at this date in vienna.. If there are other (and better) places I'm open to come there too. I were just at the university and asked and got acceptance immediately. I told them that I've to ask first and if Vienna is accepted I'll contact them with further plans. I think theres enough time to think about it - and all I can say is: Vienna is ready for it I'll continue with arrangements and search for hotels .. At least I can use this information later on.. Can someone initiate something like a voting-page? regards Werner ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS windows v's linux from a newbie perspective
I absolutely disagree. I'm not the question, I can compile (provided the appropriate directions are there). The problem is that if my 30 students twice a year have to compile or, worse, have to hire someone to do it in order to be able to use mrsid/ecw, they will just keep using windows. Or not using qgis. Linux cannot be a system for which you have to either become able of compiling QGIS or hire someone to do it. If this were the case, binaries should not be distributed. Agus Craig Leat wrote: ECW is easy to compile on Linux. I never tried to compile MrSid. MrSid seems to becoming the standard format for government raster data here, so I self compile. Compiling on Ubuntu with MrSid libs is no big deal and the performance of the MrSid SDK is excellent, in my experience. Those that need ECW and MrSid and feel strongly against compiling themselves, should hire someone to do it for them. Craig ___ 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
AW: [Qgis-user] Re: [Qgis-developer] Venue for next hackfest...Vienna?
Hi Werner Thank you for the organisation. In my opinion Vienna is a very nice place for a hackfest, so +1 from my side. I think the expensiveness is not so bad (at least compared to Zurich). And the location in the center of Europe makes it easily accessible for most community members (and Tim is used to long distance flights anyway :-) ) Regards, Marco -Ursprüngliche Nachricht- Von: qgis-user-boun...@lists.osgeo.org im Auftrag von Werner Macho Gesendet: Do 02.04.2009 09:09 An: Jachym Cepicky Cc: qgis-user List; qgis-developer Betreff: Re: [Qgis-user] Re: [Qgis-developer] Venue for next hackfest...Vienna? Hi to all! I already mentioned .. It seems that there's no _must_ to do the hackfest at this date in vienna.. If there are other (and better) places I'm open to come there too. I were just at the university and asked and got acceptance immediately. I told them that I've to ask first and if Vienna is accepted I'll contact them with further plans. I think theres enough time to think about it - and all I can say is: Vienna is ready for it I'll continue with arrangements and search for hotels .. At least I can use this information later on.. Can someone initiate something like a voting-page? regards Werner ___ 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
[Qgis-user] AW: [Qgis-developer] Venue for next hackfest...Vienna?
Hi all It's a great idea to meet in Vienna. +1 Horst Dr. Horst Düster Stv. Amtschef / GIS-Koordinator Kanton Solothurn Bau- und Justizdepartement Amt für Geoinformation SO!GIS Koordination Rötistrasse 4 CH-4501 Solothurn Telefon ++41(0)32 627 25 32 Telefax ++41(0)32 627 22 14 mailto:horst.dues...@bd.so.ch http://www.agi.so.ch -Ursprüngliche Nachricht- Von: Tim Sutton [mailto:li...@linfiniti.com] Gesendet am: Donnerstag, 2. April 2009 01:10 An: qgis-user List; qgis-developer; Werner Macho Betreff: [Qgis-developer] Venue for next hackfest...Vienna? -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi all Werner Macho has secured a location for a hackfest in Vienna in Oct 2009. Martin and others potentially attending - how would you like to proceed? I am happy to go to Vienna this time and Prague the next and would like to suggest that since Werner is so enthusiastic, we let him run with it and we can start planning for the event. Please vote +1 if you are happy to go to Vienna +1 from me Venue details etc will go here: http://wiki.qgis.org/qgiswiki/QgisHackfest2009_2 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 iEYEARECAAYFAknT9DYACgkQqk07qZdiYjeOowCfYsFFsq68UDz9G/WGZ6/oVBp3 fsIAoLmVceN+eHJo+XyIQFWV1lgg4F20 =6TjQ -END PGP SIGNATURE- ___ 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
Re: [Qgis-user] QGIS windows v's linux from a newbie perspective
so in my opinion you should contact the companies involved with MrSID and ecw to change their licence in some sort of dual licence like other companies did (e.g. Trolltech, MySQL). After all they are interested in widespread use of their technology - so they should open up and change their licence so it can become a regular component of gdal/ogr. Otherwise I don't see an easy solution. An alternative would be to ask the data providers for their original data. I am sure they have their data somehwer available with lossless compression - they wouldn't throw their originals away - would they? Both MrSID and ECW are lossy compressions ... Andreas On Thu, April 2, 2009 10:44 am, Agustin Lobo wrote: I absolutely disagree. I'm not the question, I can compile (provided the appropriate directions are there). The problem is that if my 30 students twice a year have to compile or, worse, have to hire someone to do it in order to be able to use mrsid/ecw, they will just keep using windows. Or not using qgis. Linux cannot be a system for which you have to either become able of compiling QGIS or hire someone to do it. If this were the case, binaries should not be distributed. Agus Craig Leat wrote: ECW is easy to compile on Linux. I never tried to compile MrSid. MrSid seems to becoming the standard format for government raster data here, so I self compile. Compiling on Ubuntu with MrSid libs is no big deal and the performance of the MrSid SDK is excellent, in my experience. Those that need ECW and MrSid and feel strongly against compiling themselves, should hire someone to do it for them. Craig ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- Andreas Neumann http://www.carto.net/neumann/ http://www.svgopen.org/ ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Projection question
Privet, Maxim — I am not 100% sure, but I am reasonably certain: I got them from a public Texas agency that provides spatial data (www.tnris.org). How do I find out for sure? Mikhail. On 3/31/09 at 8:25 PM, in message 419243249.20090331202...@gis-lab.info, Maxim Dubinin s...@gis-lab.info wrote: Privet Mikhail, Are you sure both shape and geoTIFF projections are assigned correctly? I mean is data really in the projection you says it is? -- Maxim Вы писали 31 марта 2009 г., 20:08:01: MU Hello — MU I have a problem with rendering layers with different projections. I MU have an SHP file with +proj=longlat +ellps=GRS80 +datum=NAD83 +no_defs MU and a geoTIFF file with +proj=longlat +ellps=WGS84 +datum=WGS84 MU +no_defs. That's all the projection data from Properties. They cover MU exactly the same area but do not even overlap in QGIS. I also noticed MU that when geotiff file is rendered the distances that should be 3 MU degrees are shown as about 10 degrees (my project options are set to MU Decimal Degrees) . I suspect that there is some confusion with MU meters/feet somewhere in the reprojection process. MU Is there any way to add +units option to the description of the MU layer's projection? Would this solve the problem? MU Thank you for your time, MU Mikhail. MU ___ MU Qgis-user mailing list MU Qgis-user@lists.osgeo.org MU 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
Re: [Qgis-user] Projection question
Thank you for the suggestions, Zoltan — Unfortunately, no luck. I enabled on the fly and set project's CRS to WGS84 (same as the GoeTiff's) but no changes in the way they are rendered in QGIS: different size and far from each other. What else can I try? Mikhail. On 4/1/09 at 3:14 AM, in message pine.lnx.4.64.0904011008270.32...@bme-geod, Siki Zoltan s...@agt.bme.hu wrote: Hi Mikhail, Did you enable on the fly projection in the project properties window? QGIS cannot reproject rasters on the fly, so you must set your project projection to the same projection of your raster layer. QGIS will reproject vectors on the fly. regards, Zoltan On Tue, 31 Mar 2009, Mikhail Umorin wrote: Hello ̇̇ I have a problem with rendering layers with different projections. I have an SHP file with +proj=longlat +ellps=GRS80 +datum=NAD83 +no_defs and a geoTIFF file with +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs. That's all the projection data from Properties. They cover exactly the same area but do not even overlap in QGIS. I also noticed that when geotiff file is rendered the distances that should be 3 degrees are shown as about 10 degrees (my project options are set to Decimal Degrees) . I suspect that there is some confusion with meters/feet somewhere in the reprojection process. Is there any way to add +units option to the description of the layer's projection? Would this solve the problem? Thank you for your time, Mikhail. ___ 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
Re: [Qgis-user] Re: [Qgis-developer] Venue for next hackfest...Vienna?
Thursday 02 April 2009 15:25:28 Jürgen E. Fischer napisał(a): Hi Werner, On Thu, 02. Apr 2009 at 09:09:19 +0200, Werner Macho wrote: I were just at the university and asked and got acceptance immediately. Cool. +1 from me. No problem for me too :-) ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Python scripting
georgew wrote: Hi all, I have not been able to find an answer to this question: Using the latest stable version of QGIS from OSGeo4W on WinXP SP3 is it possible to write free standing Python programs/scripts that will access QGIS objects (vectors, shapefiles, etc) and process them in batch, without the need for GUI or user intervention other than to run the script from Python command line (or within an IDE)? It should be possible, I believe OSGeo4w installs it's own python and hence all python libraries would be on it's path not on your system installed python. To use the libraries with your regular python install you probably need to and to the PYTHONPATH environment variable of your system the path to something like C:\OSGEO4W\QGIS\ Then import qgis.core and such should work. Alex ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Python scripting
Alessandro et al., I'm also interested in using python and QGIS for simple scripts espacially for batch processing, and some examples could be very useful! Attached is a python script for performing some basic geoprocessing functions on vector layers. The header of the file contains usage examples to help get you started... it's probably not the cleanest python code, nor the most pythonistic... but you get the idea ;-) Hope this helps to get you started... The other good resource for python scripting is: http://wiki.qgis.org/qgiswiki/PythonBindings Cheers, Carson Thanks Ale georgew ha scritto: ThanKs Alex, the problem is I have not been able to find any example that is free standing, all seem to be plugins or use QT to generate a UI. Can you point me to a working example, however simple (e.g. read shapefile, project,write shapefile) that can set me off on the right path? Many thanks G. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- 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/ from PyQt4.QtCore import * from qgis.core import * class GeoprocessingEngine( ): ''' USAGE: GeoprocessingEngine( func, layerA, layerB, outPath, encoding, param, merge ) func : geoprocessing function 1: Buffer 2: Convex Hull 3: Difference 4: Dissolve 5: Intersection 6: Union 7: Symetrical Difference 8: Clip layerA : QgsVectorLayer layerB : QgsVectorLayer outPath : string - /home/cfarmer/Desktop/test.shp encoding : default is 'System' param : a parameter, may be used for buffer, and dissolve merge : should the results be merged (buffer) EXAMPLE: # import engine from Geoprocessing import GeoprocessingEngine layerA = QgsVectorLayer(/path/to/layer.shp, layerA, ogr) layerB = QgsVectorLayer(/path/to/layer.shp, layerB, ogr) # create geo engine geo = GeoprocessingEngine( 5, layerA, layerB, '/home/cfarmer/Desktop/test.shp') # compute geoprocessing event, and output result outlayer = geo.compute() # compute() returns the output layer as a QgsVectorLayer This alows us to link multiple runs together: geo1 = GeoprocessingEngine( 5, layerA, layerB, '/home/cfarmer/Desktop/test1.shp') outlayer = geo1.compute() geo2 = GeoprocessingEngine( 3, layerA, outlayer, '/home/cfarmer/Desktop/test2.shp') outlayer = geo2.compute() ... ... temp files are created for better usage of memory when using large layers ''' def __init__( self, function, layerA, layerB, outputName, encoding = 'System', param = 0, merge = False ): self.myFunction = function self.success = False self.layerA = layerA self.layerB = layerB self.param = param self.merge = merge self.outputName = outputName self.encoding = encoding def compute( self ): check = QFile( self.outputName ) if check.exists(): if not QgsVectorFileWriter.deleteShapeFile( self.outputName ): return None self.geoprocessing( self.myFunction, self.layerA, self.layerB, self.param, self.merge, self.outputName, self.encoding ) return QgsVectorLayer( self.outputName, temp, ogr ) def geoprocessing( self, function, myLayerA, myLayerB, myParam, myMerge, myName, myEncoding ): self.myFunction = function self.myLayerA = myLayerA self.myLayerB = myLayerB self.myParam = myParam self.myMerge = myMerge self.myName = myName self.myEncoding = myEncoding self.vlayerA = self.myLayerA if self.myFunction == 1 or self.myFunction == 2 or self.myFunction == 4: ( self.myParam, useField ) = self.checkParameter( self.vlayerA, self.myParam ) if not self.myParam is None: if self.myFunction == 1: geos, feature, match = self.buffering( useField ) elif self.myFunction == 2: geos, feature, match = self.convex_hull( useField ) elif self.myFunction == 4: geos, feature, match = self.dissolve( useField ) else: self.vlayerB = self.myLayerB if self.myFunction == 3: geos, feature, match = self.difference() elif self.myFunction == 5: geos, feature, match = self.intersect() elif self.myFunction == 6: geos, feature, match = self.union() elif self.myFunction == 7: geos, feature, match = self.symetrical_difference() elif self.myFunction == 8: geos, feature, match = self.clip() def buffering( self, useField ): GEOS_EXCEPT = True FEATURE_EXCEPT = True vproviderA = self.vlayerA.dataProvider()
Re: [Qgis-user] Python scripting
Alessandro et al., I'm also interested in using python and QGIS for simple scripts espacially for batch processing, and some examples could be very useful! Attached is a python script for performing some basic geoprocessing functions on vector layers. The header of the file contains usage examples to help get you started... it's probably not the cleanest python code, nor the most pythonistic... but you get the idea ;-) Hope this helps to get you started... The other good resource for python scripting is: http://wiki.qgis.org/qgiswiki/PythonBindings Cheers, Carson Many thanks Carson and Alex, your help has been invaluable, and I am sure not just for myself. Thanks Carson for the example, more than I asked for and much appreciated. regards George -- View this message in context: http://n2.nabble.com/Python-scripting-tp2577010p2577897.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
[Qgis-user] Re: MrSID programs
I saw recently on the list where someone was trying to use .sid files. I found these programs on Lizardtech. Maybe they will be useful to someone... Tom http://www.lizardtech.com/download/dl_options.php?page=geo#12 MrSID SDW Command line utility that generates .sdw file for associated georeferenced .sid file. Latest Release: 09-2003 MrSID Decode Command line utility that allows for decompression of MG2 or MG3 .sid files to .tif, GeoTiff, and other formats. Latest Release: 11-2008 MrSID Info Command line utility that displays metadata information embedded in .sid, .tif, and other formats. Latest Release: 06-2006 ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
