[QGIS-trac] [Quantum GIS] #2304: In GRASS plugin, r.water.outlet is not working

[Quantum GIS]

#2304: In GRASS plugin, r.water.outlet is not working
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   Reporter:  micha                             |              Owner:  rugginoso        
       Type:  bug                               |             Status:  new              
   Priority:  major: does not work as expected  |          Milestone:  Version 1.4.0    
  Component:  GRASS                             |            Version:  1.3.0            
   Keywords:  hydrological analysis, basin      |   Platform_version:  Win32 Ubuntu 9.10
   Platform:  All                               |           Must_fix:  No               
Status_info:  0                                 |  
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 I cannot get expected results with the r.water.outlet GRASS module in QGIS
 1.3.0. I've tried in a few different locations, on both win and linux
 setups, and I always get a uniform raster with value 0 covering the whole
 region.
 I recall this working properly in earlier versions of QGIS (pre-1.0)

 To duplicate the issue:
 In the North Carolina database, run r.watershed using the elevation raster
 to create flow direction, streams and catchments rasters. Then run
 r.water.outlet using the resulting flow direction, and a drainage outlet
 point on the streams raster. Results are always a black raster covering
 the whole region.

 Working in GRASS, outside of QGIS, using the same GRASS database, flow
 direction, and same easting-northing values results in a correct drainage
 basin.

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/2304>
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Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats