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I am a GRASS novice, but I need to prepare a demonstration of GRASS capabilities.  Because our lab is looking to investigate integration of GIS with other tools for water resource management, I wanted to run r.watershed.  I am having difficulty using it with the spearfish sample database.  I thought it would be very straightforward to specify the elevation.dem layer and produce subbasins.  Unfortunately, the output map is complete garbage.  I have tried a number of threshold values from 1 to 100, and I have gone through the interactive mode.  Nothing seems to look right when it finishes running.  Can someone help?


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Michael J. Bender, MSc PEng
Research Associate (Ph.D. candidate)

Facility for Intelligent Decision Support in Water Resources
Department of Civil & Geological Engineering
University of Manitoba
Winnipeg, Manitoba, R3T 2N2, CANADA

(204) 474-6746 [phone]
(204) 261-9534 [fax]

mike@fids.ce.umanitoba.ca

