[GRASS-user] limit Voronoi or other vector programs

Hamish hamish_b at yahoo.com
Wed Oct 1 23:40:42 EDT 2008

William L. Baker wrote:
> v.voronoi produces lots of spurious polygons if there is lots of space 
> without points outside where the points actually lie, which occurs if a 
> study area has an irregular shape (not rectangular). Thus, some kind of 
> buffer around the points is needed to set limits on the analysis space. 

If v.hull is no-good for areas shaped like a "C", perhaps v.buffer +
"v.clean -> remove small areas" or v.buffer then v.centroids+v.dissolve
would do a better job?

and don't forget v.select which is much faster than v.overlay.



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