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