[GRASS-user] stream extraction from ASTER dem

[Milton Cezar Ribeiro]

Hi Markus,

May be you are right (Vista issue!). Two month ago I was trying to run the
same steps on grass, but I was expecting that new OSGeo4W release included
some fix for that. :-(

Anyway, thanks for your time.

Any colleague that could suggest a way of I extract some geomorphometry
features (sensu Tom Hengl!) from "large" DEM (10,000x6,000), please let me
know.

bests

milton

2009/9/28 Markus Metz <markus.metz.giswork at googlemail.com>

>
> Milton Cezar Ribeiro wrote:
>
>> Dear all,
>>  I have a DEM with dimensions 10,000 x 6,000. Now I need to
>> extract all the stream or drainage, as well as generated some
>> other stream/flow related features like flow direction,
>> stream lenght, etc.
>>  I work on a computer with 6Gb under Vista, and the grass
>> version is the OSGeo4W one. But when I try to run the command
>> below I get one error relate to r.watershed.seg.exe:
>>  r.watershed elevation=aster_dem stream=aster_dem_stream threshold=150 -m
>> memory=2048
>>  Any idea of how to solve that?
>>
> Maybe it is the Vista UAC problem, there were recently other posts related
> to this.
>
> Just a guess,
>
> Markus M
>
>
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