[GRASS-user] Duplicate features in output of v.out.ogr

Benjamin Ducke benducke at fastmail.fm
Fri Sep 12 10:04:12 PDT 2014

Hi All,

I have extracted the centroids of a map with polygons,
but some of the extracted centroids have identical "cat"
numbers. I suspect that those are centroids of multi-
part polygons that share the same attribute table records
in the original input data (a MapInfo file).

I would like to reduce my set of centroids to only one
per "cat" value.

So my question is.
Is there a simple way to remove features with duplicate
"cat" numbers from a GRASS map?

Thanks and best,


Dr. Benjamin Ducke, M.A.
{*} Geospatial Consultant
{*} GIS Developer

  benducke at fastmail.fm

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