[GRASSLIST:609] Re: Cutting edges

[Paul Kelly]

You could experiment with s.to.rast. In the raster output from it, only
the cells that contained points will have data; the others will be null.
This might be what you want or else you could use this as a MASK to
extract the data from your IDW-interpolated raster. Something like

s.to.rast input=sitesfile output=sitesmask
g.copy rast=sitesmask,MASK
r.resample input=idwoutput output=maskedidw
g.remove rast=MASK


On Fri, 4 Jul 2003, Poizot Emmanuel wrote:

> 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
>
> --
> Cordialy
> ----------------------------------------
> 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
> -----------------------------------------
>
>