Hello,
I've got one detailed land-use map and one calculated sub-basin map, which I want to intersect in order to create hydrological response units (they will also be intersected with geology and soil maps at a later step).
The intersection will give me all sorts of polygons and a lot of small polygons. I suppose, that my land-use map, which was digitized manually is correct, and I don't want to loose this information. Contrary, the sub-basin map, which was calculated automatically can be changed.
So, I'm looking for a tool to snap the sub-basin borders to the land-use borders. If I use v.clean rmarea, this will union the small polygons, but change my land-use borders. I tried also to run v.clean snap several times, but this will still change the land-use limits.
Is there any tool in GRASS where I can say to which layer I want to snap another layer of polygons or lines?
Many thanks,
Sonja
I can eliminate them with v.clean, rmarea or snap.
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Sonja Jankowfsky
UR Hydrologie-Hydraulique
Cemagref de Lyon
3 bis quai Chauveau CP 220
69336 Lyon Cedex 09
FRANCE
Tel : (+33)4 72 20 86 11 Fax : (+33)4 78 47 78 75