[GRASS-user] Clipping Raster Map
rshepard at appl-ecosys.com
Fri Jan 1 19:43:03 EST 2010
On Fri, 1 Jan 2010, Hamish wrote:
> please post the output of
> g.region -p
GRASS 6.4.0svn (Oregon):/usr4/grassbase/Oregon > g.region -p
projection: 99 (Lambert Conformal Conic)
> r.info -gs $mapname
GRASS 6.4.0svn (Oregon):/usr4/grassbase/Oregon > r.info -gs map=dem
> how long are we talking about to render here, 2 seconds or 20?
Well, after about 3 minutes it may move off 0% to 3%. After 5 or 6 minutes
I hit ^C to kill the process.
> g.copy only copies files*, it doesn't resample. if your base raster map
> is stored in PERMANENT or somewhere else in your mapset search path then
> there is usually little need to make a local copy, it will resample on
> the fly as needed, at full speed.. "copy" with r.resamp* or r.mapcalc
> if you want a new map which really is cropped
The full span is stored in PERMANENTA. I want to work only with the
project area which is why I g.copy when I screw up the local copy.
More information about the grass-user