[GRASS-user] r.watershed crashing grass.

[stephen sefick]

Do you have enough hard disk space?  I have had a problem running
r.watershed on very large datasets (my computer is much more modest).
I have had luck resampling the data to a larger resolution and then
running r.watershed.  r.watershed crashes at 10m res but will run just
fine at 50m.  1GB RAM.

Stephen Sefick

On Fri, Jul 24, 2009 at 5:57 PM, Milton Cezar
Ribeiro<miltinho.astronauta at gmail.com> wrote:
> Dear all,
>
> I am trying run a r.watershed command with one 7200x7200 DEM map.
> But after one day running, the system crash without finish the output
> generation.
> Please, see below (2 warnings before crash).
> By the way I am running grass 6.4.0 SVN (rc4?) under Msys/Vista
> on a 6Gb/64 bits machine.
>
> Thanks for the help,
>
> milton
> ===
> GRASS 6.4.0svn (newLocation):c:/Users/famiglia > g.region -p
> projection: 0 (x,y)
> zone:       0
> north:      -23.99986111
> south:      -26.00013889
> west:       -49.00013889
> east:       -46.99986111
> nsres:      0.00027778
> ewres:      0.00027778
> rows:       7201
> cols:       7201
> cells:      51854401
>
>
> GRASS 6.4.0svn > g.region rast=FabioASTGTM_S2526W04948_dem
> GRASS 6.4.0svn > r.watershed.exe -m 4096
> elevation=FabioASTGTM_S2526W04948_dem
> stream=FabioASTGTM_S2526W04948_dem_rwatershed_stream_thres0100 threshold=100
> --o
>  WARNING: Subprocess failed with exit code 255
> WARNING: category information for
>          [FabioASTGTM_S2526W04948_dem_rwatershed_stream_thres0100] in
>          [PERMANENT] missing or invalid
>
>
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-- 
Stephen Sefick

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods.  We are mammals, and have not exhausted the
annoying little problems of being mammals.

								-K. Mullis