[GRASS-user] r.stream.basins error

[Markus Metz]

Francesco Mirabella wrote:
> 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 ?

Please provide the exact commands for each step, including cutting the
DEM and setting the region to the clipped map, also r.info on all
maps.

Markus M