[GRASS-dev] r.watershed and swap memory

[Helena Mitasova]

On Mar 19, 2008, at 10:58 AM, Markus Neteler wrote:

> 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)
>
> Helena,
>
> apparently it isn't. Would you mind to add it to
> raster/r.terraflow/description.html
> ?

that is for r.watershed Helena

> thanks
> Markus