Thanks Stefano for your reply even though my message had no subject. I will try v.voronoi.
I am re-posting the message since the first time I forgot to put a subject:
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Dear list,
so far, I have been masking either via MASK or r.mapcalc. This way, only cells corresponding to MASK would display in the masked raster.
In contrast, now I would like cells corresponding to a "mask" NOT to display* in the main raster layer. Is there a way to do it?
This is part of a larger issue I am addressing and that I will briefly describe. In the attached sample image, you see points imported via v.in.ascii and used to get the green interpolated raster. Values at black points are greater than zero, whereas the value of the white point is zero (and it is not used for interpolation since it has no biological meaning).
The end result would be to clip out a portion of the green raster around the white point. This portion would be delimited by midpoints between the white point and the closest neighboring black points.
So far, I have been trying to get a vector buffer around the white point and then v.to.rast for some kind of subsequent clipping (described above*). However I have no cue on how to get a comlex shape from neighboring points as described. Is there a method already in place to do this?
Many thanks in advance and any hints very much appreciated,
Luigi
grass6/cygwin user
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