[GRASS-user] r.threshold: Where is the output?

[Helmut Kudrnovsky]

>>Do I run r.mapcalc on the accumulation map to replace negative values with
> >   zeros? Or, is there a different preferred approachu?
>
>
>you can use abs function of r.mapcalc

would the -a flag of r.watershed be an option?

http://grass.osgeo.org/grass64/manuals/html64_user/r.watershed.html

-a
    Use positive flow accumulation even for likely underestimates.[...]

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best regards
Helmut
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