jontyknox

Flow Direction tool not calculating approperiate values from a burned DEM

Discussion created by jontyknox on Jun 11, 2010
Latest reply on May 6, 2011 by Szaman
I am conducting some watershed work in conjunction with land use etc and I recently had to burn my streams into my DEM so a proper flow accumulation of the area could be calculated.
The burn of the streams went well, but now when I try and calculate the flow direction instead of getting the standard 1,2,4,8,16,32,64 and 128 I have values ranging from 1 to 248. Most of the pixels are the standard values but there are in the region of 10,000 pixels that aren't.
Needless to say this completely throws off my flow accumulation grid and I can no longer calculate my watersheds.

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