[GRASS-user] redefining bouding box before export raster maps

[Hamish]

Milton Cezar Ribeiro wrote:
> I have a large raster map (48.000 x 60.000) with about 250,000 patches
> with different class values. Now I need to select on those patches in a
> list (like patches 30, 100, 634 etc) and them export those
> selected patches.
> 
> I can select the desire patches using r.class. But, before I export the
> images,
> I would like to change the region of the raster, because if I do this
> each output image will be strongly smaller (like 1000x1000 cells).

in a loop, r.reclass the individual patch (cat) number, so only that cat
is left in the reclassed map. Then use 'g.region zoom=reclassed_map' before
each export and then 'g.region rast=original_map' before the next reclass.


Hamish