[GRASS-dev] shrink region to non-null pixels

[Markus Neteler]

On Tue, Apr 20, 2010 at 8:24 AM, Yann Chemin <yann.chemin at gmail.com> wrote:
> Hello list,
>
> After extracting features from an image, I would like to shrink the
> computational region only to the smallest area including non-null
> pixels.

Try:

g.region -h
    zoom   Shrink region until it meets non-NULL data from this raster map

So:
g.region zoom=yourmap -p

Please pay attention to the resolution etc. (so -p is suggested).

Markus