[GRASS-user] r.watershed: output basin map

Margherita Di Leo diregola at gmail.com
Thu Apr 19 03:52:06 EDT 2012


Hi,

On Thu, Apr 19, 2012 at 12:48 AM, Rich Shepard <rshepard at appl-ecosys.com>wrote:

>  The attached pdf shows the basin map output by r.watershed based on a 10m
> DEM and a threshold of 150000. The NHD level 6 subbasins are outlined in
> black and the 1:24K NHD streams are in blue.
>
>  The small white areas at the bottom left and center right appear to be
> external to defined sub-basins. But I don't know how to interpret the
> larger
> white areas with streams in them (center and top). The top margin is an
> international boundary so I can understand not being able to completely
> define sub-basins across that boundary since the DEM doesn't reach that far
> north, but it's not consistently white.
>
>  Please help me interpret the white areas with vector streams.
>

Please post information about the region, r.info of the map and the command
line of r.watershed that you use. Also, do you use a mask?
Pankaj Kr Sharma, please avoid to reply attaching the whole digest.

Thanks,
madi

-- 
Ing. Margherita Di Leo, Ph.D.
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