[GRASS-dev] r.watershed and swap memory

Markus Neteler neteler at osgeo.org
Wed Mar 19 10:58:21 EDT 2008

On Wed, Mar 19, 2008 at 3:54 PM, Helena Mitasova <hmitaso at unity.ncsu.edu> wrote:
> Ivan - instead of using the small threshold that is killing it, if
>  you need just the stream network use arbitrarily large threshold and
>  derive your stream network from the accum file like this
>  r.mapcalc "mystreams=if(abs(myaccum)>30,1,null())"
>  or you can use abs(myaccum) instead of 1 if you need contributing
>  area for each stream cell.
>  (isn't this in the man page? I have been doing it that way for years)


apparently it isn't. Would you mind to add it to

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