Re: [Qgis-user] How to probe raster values?
> I've decided not to wait and have done the necessary changes, so from > SVN r8443 you're able to use identify() for rasters. A simple example > to print bands and the values at specified point: Wow! Huge thanks! I'm running for coffee and then to SVN! :) ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to probe raster values?
Good Work Martin, Thanks ! Richard Duivenvoorde Martin Dobias wrote: On Thu, May 15, 2008 at 12:12 PM, Borys Jurgiel <[EMAIL PROTECTED]> wrote: Martin, so may we expect, that the identify() method will be rewritten to match QMap-type arguments in the near future? I've decided not to wait and have done the necessary changes, so from SVN r8443 you're able to use identify() for rasters. A simple example to print bands and the values at specified point: ident = rlayer.identify(QgsPoint(15.30,40.98)) for (k,v) in ident.iteritems(): print str(k),":",str(v) cheers, Martin ___ 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] How to probe raster values?
Great move! I've been looking for this functionality for python! Thanks Martin. Carson > On Thu, May 15, 2008 at 12:12 PM, Borys Jurgiel <[EMAIL PROTECTED]> > wrote: >> >> Martin, so may we expect, that the identify() method will be rewritten >> to >> match QMap-type arguments in the near future? > > I've decided not to wait and have done the necessary changes, so from > SVN r8443 you're able to use identify() for rasters. A simple example > to print bands and the values at specified point: > > ident = rlayer.identify(QgsPoint(15.30,40.98)) > for (k,v) in ident.iteritems(): > print str(k),":",str(v) > > cheers, > Martin > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user > Carson Farmer Spatial Pattern Analysis & Research Lab (SPAR) Department of Geography, University of Victoria www.geog.uvic.ca/spar/carson [EMAIL PROTECTED] ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to probe raster values?
On Thu, May 15, 2008 at 12:12 PM, Borys Jurgiel <[EMAIL PROTECTED]> wrote: > > Martin, so may we expect, that the identify() method will be rewritten to > match QMap-type arguments in the near future? I've decided not to wait and have done the necessary changes, so from SVN r8443 you're able to use identify() for rasters. A simple example to print bands and the values at specified point: ident = rlayer.identify(QgsPoint(15.30,40.98)) for (k,v) in ident.iteritems(): print str(k),":",str(v) cheers, Martin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to probe raster values?
Thanks a lot, guys! Carson, I'll use GDAL, as there is no other way out ;) but I strongly prefer to read values directly from QGis's object due to compatibility with any data source - but this is also subject for another topic. Wait a moment ;) Martin, so may we expect, that the identify() method will be rewritten to match QMap-type arguments in the near future? Cheers, Borys ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to probe raster values?
Borys, What about using GDAL to access your raster values? Your plugin could get all the needed info (i.e. path, name, etc), load the data using GDAL, and read the data as needed using ReadRaster. Check out: http://www.gdal.org/gdal_tutorial.html or http://www.nabble.com/beginners-programming-questions-td15498345.html for details. Cheers, Carson Borys Jurgiel wrote: Hi Everybody! I'm working on a plugin in Python and I can't find any way to read values (at specified coordinates) from raster layers. I've tried with "identify" method of QgsRasterLayer object, but it's unavailable in my QGIS 0.10. Is this method depreciated, or only there is no Python binding for it yet? Is there any other way, or is that my time for switch to C? :) Regards, Borys. ___ 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] How to probe raster values?
On Tue, May 13, 2008 at 7:10 PM, Borys Jurgiel <[EMAIL PROTECTED]> wrote: > Hi Everybody! > > I'm working on a plugin in Python and I can't find any way to read values (at > specified coordinates) from raster layers. > > I've tried with "identify" method of QgsRasterLayer object, but it's > unavailable in my QGIS 0.10. Is this method depreciated, or only there is no > Python binding for it yet? > > Is there any other way, or is that my time for switch to C? :) Hi, identify() method does exist, however it's not included in PyQGIS because of use of std::map as an argument (which is currently discouraged in favour of QMap). I'm affraid there's not other way in Python to do read values from raster layer. Martin ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] How to probe raster values?
Hi Everybody! I'm working on a plugin in Python and I can't find any way to read values (at specified coordinates) from raster layers. I've tried with "identify" method of QgsRasterLayer object, but it's unavailable in my QGIS 0.10. Is this method depreciated, or only there is no Python binding for it yet? Is there any other way, or is that my time for switch to C? :) Regards, Borys. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
