[GRASSLIST:606] Cutting edges

[Poizot Emmanuel]

Hello all,
I did a raster file based on a sites files after an IDW interpolation.
I would like to extract from the raster file the area where there are points, 
i.e. I would like to erase part of the raster where IDW did not have points 
to compute "true" values.
How can I do that with Grass

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Cordialy
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Emmanuel POIZOT
Cnam/Intechmer
Digue de Collignon
50110 Tourlaville
Tél : (33)(0)2 33 88 73 42
Fax : (33)(0)2 33 88 73 39
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