Selon Homme Zwaagstra <[email protected]>: > Hello, > > I'm interested in performing on-the-fly coordinate transformations of > OGR data sources using the Virtual Format (VRT) driver. That is, > producing a file that is the vector equivalent of: > > gdalwarp -of VRT -t_srs "+init=epsg:4326" input.tif transformed.vrt > > I understand ogr2ogr cannot do this but am wondering if the vector > version of `transformed.vrt` can be created manually?
Yes, ogr2ogr -f VRT is not implemented as such. But there's a python script in http://svn.osgeo.org/gdal/trunk/gdal/swig/python/samples/ogr2vrt.py that can generate a VRT schema from a OGR datasource > > Having looked at the source code it looks like the answer will be no > ;) - if this is the case is there be a reason not to file an > enhancement request for this functionality? But indeed, the OGR VRT format doesn't currently support on-the-fly reprojection. This could certainly be implemented. I somehow remember to have worked on a prototype for this. The tricky part was the interaction with spatial filter or spatial extent where you must apply the reverse reprojection to the source layer. _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
