I'm quite new to GRASS. I have a simple DEM that I can't get GRASS (5.0.2) to generate watershed boundaries for that make any sense. I have tried this on other DEMs with mixed success. I have reviewed as much literature as possible on-line and tried smoothing, filling sinks, fixing depressions, etc. but still no boundaries that intuitively look right.
I have posted my ASCII DEM (1.1 Mb) at: http://www.planlab.ca/help.html
Any feedback, links to methods, tips, tricks or other inspiration appreciated.
Thanks in advance,
David.
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David A. Carruthers
78 montrose avenue
toronto, ontario m6j 2t7
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work 416.536.7357
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