I followed your suggestion, but I'm still getting the same problem. It seems strange that v.to.rast would create a vector file that has flawed topology. Do you know of any alternative to v.clean with rmarea?
Btw, I also tried to use v.generalize with a very small threshold and then v.clean. This method works for me. > -----Original Message----- > From: Alex Mandel [mailto:tech_...@wildintellect.com] > Sent: Thursday, December 11, 2008 3:14 PM > To: Moskovitz, Bob > Cc: Grass-User (E-mail) > Subject: Re: [GRASS-user] r.to.vect and then v.clean using tool=rmarea > createspolygons instead of holes. > > > Moskovitz, Bob wrote: > > Hello Grass-Users, > > > > I'm having problems with this sequence of commands: > > r.to.vect -s input=lszone output=lszone10 feature=area > > v.clean input=lszone10 output=lszone10_clean > tool=rmarea thresh=2800 > > > > Below is the output. > > > > Overlaying lszone and lszone10_clean, I see that there are > large holes > > that have been replaced with polygons. Is this a bug? > > > > Btw, I've tried this with QGIS on Windows XP as well as > GRASS 6.4.svn > > with the same results. > > > > Bob > > > > Hmm, I'm wondering if there's a flaw in the topology built by > r.to.vect > > What happens if you run v.build before v.clean? > > At second glance I see how if a small polygon gets removed > and it shared > a border with the big polygon, that that border might not exist now. > maybe add the bpol to tool=rmarea,bpol > > Alex > > > _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
