On Wed, Jul 22, 2009 at 1:06 AM, Dwight Needels<need...@translucida.com> wrote: > Hi all, > > I have two nearly identical line vectors, and I would like to extract the > lines that differ between the two vectors into a third vector. Specifically, > I want to isolate the connecting lines that were generated by v.net > operation=connect. Something like: > > [map_C = map_A NOT map_B] for line features. > > I thought I would be able to use v.overlay with operator=not, but it it > appears to require that btype=area. It also appears that v.select allows > only operator=overlap. > > Can someone point me in the right direction? > > I am using William Kyngesburye's 6.4.0RC3 on MacOS 10.5.7.
Since GRASS 6.5 there is GEOS support with more functionality available in v.select, see also http://lists.osgeo.org/pipermail/grass-user/2009-June/051142.html This may be a way. Markus _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user