Hi all, does anyone have a new(er) trick for negative vector buffers (in GRASS 7)?
thanks Markus On Thu, Oct 29, 2009 at 4:59 PM, Milton Cezar Ribeiro <miltinho.astrona...@gmail.com> wrote: > Hi Maning, > > Sometimes I have the same issue, but I don't solve this on vector. > Just supose you have a map where 1 is your raster-based-polygon > and NULL is outside of polygon. You can use r.mapcalc to > invert it, in the maner that 1 come to be your non-polygon, and > NULL your polygon. So you can run r.buffer with positive value > and at the end may be you need to do some kind of crossing > between original and output maps. > > Bests. > > miltinho > > 2009/10/29 maning sambale <emmanuel.samb...@gmail.com> >> >> I tried using a negative values as >> buffer=-3000 in v.buffer but it doesn't give me internal buffer in a >> polygon layer. >> >> Any hints? >> >> -- >> cheers, >> maning >> ------------------------------------------------------ >> "Freedom is still the most radical idea of all" -N.Branden >> wiki: http://esambale.wikispaces.com/ >> blog: http://epsg4253.wordpress.com/ >> ------------------------------------------------------ >> _______________________________________________ >> grass-user mailing list >> grass-user@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/grass-user > > > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user