[GRASS-user] areas with no centroid

[Helmut Kudrnovsky]

> Thanks for the suggestion, but the area with no centroid doesn't 
>have a cat. 

that's exactly what I've meant. 

then do v.extract cats="cats of the polygones with cat" to extract only
these polygones you need. 

from the v.extract manual :

cats=range
Category values
Example: 1,3,7-9,13




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best regards
Helmut
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