[GRASS-user] r.stream.basins error

[Jarek Jasiewicz]

Francesco Mirabella pisze:
> Hi all,
> I am trying to generate a basins map from a dem using r.stream.basins
>
> I first cut the dem to the area I want to work on than run g.region to 
> set the region to this map.
> Then I calculated streams and streams flow directions with 
> r.stream.extract.
>
> In order to get stream basins I used r.stream.basins:
> r.stream.basins  dir=rivers_flow    stream=rivers   basins=basins_rivers
>
> The output gives an error saying:
>
> Reading maps...
> Calculate basins using streams...
> Finding nodes...
> ERROR: Stream and direction maps probably do not match
> (Mon Oct 11 11:15:28 2010) Comando terminato (0 sec

>
> Why do they not match if I derived them with the same command and from 
> the same dem ? Am I doing something wrong ?
such errors appears when region dir map and stream map comes from 
different operations. Try if you are using most actual r.stream.extract 
and r.stream basins modules.
How much unique streams you have created with r.stream.extract?
>
> thanks in advance
> Francesco
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