On 19/04/2012 01:48, Rich Shepard wrote:
The attached pdf shows the basin map output by r.watershed based on a 10m Using the 10m DEM (I suppose your regions settings are the same?) then each pixel is 100 sq.m. So a threshold of 150000 would delineate watersheds of a minimum 15,000,000 sqm = 15 sq km. Does that seem to be what you're getting? If so, then white areas are small catchments that are hydrologically separated from the larger basins, and thus don't "belong" to any of the NHD larger basins. The streams in those smaller catchments flow off the map into some other large basin that doesn't appear in the NHD group. I'm not sure if this helps any. What do you see as a problem? Please help me interpret the white areas with vector streams.
-- Micha Silver 052-3665918 |
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