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

[Hamish]

Yann wrote:
> After extracting features from an image, I would like to
> shrink the computational region only to the smallest area
> including non-null pixels.
> 
> is there a module made for that, or should it be created?

g.region zoom=

it will start shrinking from the current region, run g.region rast=
first if you want to trim a map instead of zoom in on a feature
within it. 

Using a reclass map with this can be very effective for isolating
areas containing single categories!


Hamish