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