Nikos Alexandris: > > Still, I find it counter-intuitive that it's required to create a new > > vector map to achieve that. > > > > --%<--- > > v.category in=wrs2_tiles_of_interest_testing@PERMANENT layer=2 option=add > > > > ERROR: Output vector wasn't entered > > --->%--
Markus Metz wrote: > Because you need to modify vector geometries in order to add a new > layer. Categories and layers are first and foremost stored together > with the geometries. Whenever geometries are modified, the result will > be a new vector map (with the exception of v.edit and the digitizers). Just for (even more) completeness and understanding: adding a new layer does not really change the geometries per-se (that is the topology, the shape). It's the inner design of the vector data model, i.e. the fact that categories and layers are bound together. Is it wrong to describe it as an internal "indexing" issue or similar? Thanks, N _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
