[GRASSLIST:571] Re:

[Maciek Sieczka]

On Tue, 04 Apr 2006 19:50:34 +0200
lponti at infinito.it wrote:

> 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?

Not sure if I really got you right. But if all you need is to revert
mask, why not:

g.rename rast=MASK,mask_orig
g.region rast=mask_orig
r.mapcalc 'mask_rev=if(isnull(mask_orig),1,null())'
g.copy rast=mask_rev,MASK

(Assuming that your valid area in MASK is 1).

<snip>

Maciek

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