Dear all I have a shapefile which have a lot of polygons, many of them overlapping other polygons. O ArcGis, if I select one polygon by attribute I can highlight only the polygon of interest.
Now I need input it on GRASS, but when I use "v.in.org input=... output=..." the GRASS (re)generate the topology of my polygons, breaking they by every overlapping region. So, from 1400 polygons now I get about 100,000 areas. And the command not finish after hours. My question is if I really need to (re)generate the topology leaving grass split my original polygons on a lot of small pieces. I really need to keep the polygons as AREA (?boundary?) because I will v.to.raster it after. By the way, I used "v.in.ogr -c ..." and the "-c" flag made the process to be very fast. But I get only lines (not area) and don´t know why my polygons appear to be shifed after I v.extract by attribute. Any help are very welcome. Best wishes miltinho
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