On 14/05/19 23:46, Veronica Andreo wrote:
Hi all,
I was working today with a very simple vector map which corresponds to
clusters (circular polygons) that overlap and it is just fine that they
overlap. So, i received a shapefile with 3 of these clusters. Two of
them overlaped. When I import them into GRASS with v.import I get an
extra centroid and area where 2 of the polygons overlap.
Problem arises when I want to query a raster map with those polygons
since originally the attribute table contained only 3 polygons (which is
just fine). However, v.what.rast will only upload values for 2 of those
three polygons because it finds 2 centroids with the same category, AFAIU.
I tried with
v.clean input=clusters output=clusters_clean1 tool=break,rmdupl,rmsa,rmdac
and
v.clean input=clusters type=centroid output=clusters_clean2 tool=rmdupl
If your overlap polygons are smaller than the cluser polygons, you could
use v.clean rmarea with a relevant threshold.
Moritz
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