[GRASS-user] Why r.watershed Yields Narrow Basins

[Rich Shepard]

On Fri, 8 Jun 2012, Rich Shepard wrote:

>  Sample maps can be provide if desired.

   Attached is such a map. The base DEM has a 10mx10m resolution (source:
National Elevation Dataset). The black lines are the HUC-12 sub-watershed
boundaries from the National Hydrographic Dataset. The red lines are the
vectorized bounds from r.watershed with a threshold of 125,000.

   I'd like to understand why some of the r.watershed basins look like
squashed worms.

Rich
-------------- next part --------------
A non-text attachment was scrubbed...
Name: r.watershed.output.pdf
Type: application/pdf
Size: 85747 bytes
Desc: 
URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20120608/5b573736/attachment-0001.pdf>