Selon Paul Meems <[email protected]>: > Thanks Even. > > So this means I need to write my own application using the Union() from > GEOS and I cannot use it on the command line using OGR VRT? > That is OK, I can do that. Using existing utilities on the command line > seemed easier ;)
You don't necesserarily need to write an application. You can use ogr2ogr -sql "SELECT ST_Union(....)" -dialect sqlite if you have GDAL built with spatialite support. or if you can use Python for example, the OGR Layer algebra operations are available. See http://trac.osgeo.org/gdal/browser/trunk/autotest/ogr/ogr_layer_algebra.py for example around line 119 (err = A.Union( B, C )). Writing a script that would use those operations would be a good contribution if you are interested in. _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
