On Thu, 2008-05-29 at 09:41 +1000, Edward Tomlinson wrote: > Hi list, > [...] > My problem is however, i want to create another vector file that > contains the mask or the external (an internal island) boundary. > > I have been able to create the external boundary fine through the > following. > v.category (delete categories) > v.category (add category as 1 for all) > v.dissolve (combine all boundaries with common category) > > This is great and works fine for the external boundary. However there > is meant to be an island in there. Somewhere along the way (i think > after the second call to v.category) it fills that island in. > > Has anyone got any hints or ideas?
If it is about one "area" only what about removing it's centroid before dissolving (I guess) ? [...] Nikos > _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
