[GRASS-user] r.stream.basins error

[Francesco Mirabella]

Hi,
thanks for you message,
the modules were compiled from the add-ons about one week ago, I suppose 
they should be the updated version.
What do you mean by "unique streams"? If you mean the number of streams 
which come out from the operation, these are about 7500. Do you think is 
the area too large? BTW I was successful with r.watershed on the same 
dataset but I just wanted to test these new modules

Francesco



Jarek Jasiewicz wrote:
> 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
>> _______________________________________________
>> grass-user mailing list
>> grass-user at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/grass-user
>