[GRASS-user] Importing vectors (polygons) without building topology
Hernán De Angelis
hernan.deangelis at glocalnet.net
Thu Jun 22 18:44:13 EDT 2006
I have a bunch of PostGIS layers (polygons) that I want to import into GRASS.
These polygons represent palaeogeographic features and therefore they
necessarily overlap over some regions (different entities are distinguished
by attributes in the attribute table). Since v.in.ogr automatically builds
topology by default, a secondary layer is generated during import where the
the overlapping sectors of the polygons are cut and stored. Whereas this
might be useful for a wide range of applications it is certainly not
desirable in my case, since it destroys the palaeogeographic representation.
My question is therefore: how can I import these shapefiles and avoid topology
building at the same time? I understand that exporting the tables as text and
importing them using v.in.ascii might be an option, but I would rather prefer
to preserve the carefuly designed attribute tables as they are, without
having to regenerate them.
I have been thinking in this problem during a couple of days without coming to
a decent solution, so I hope someone can give me a hint on this.
I am using GRASS 6.0.2 RC4 in OpenSuSE 10.0.
Thanks in advance
More information about the grass-user