[GRASS-dev] r.watershed question

Michael Barton michael.barton at asu.edu
Thu Sep 17 14:57:34 EDT 2009

r.watershed can produce a map of "drainage directions".

The values of a direction map are in the range of -8 - +8

Can someone tell me what these numbers refer to? That is, what  
direction is 3 or -3? I've tried to run some correlations against an  
aspect map and am not getting meaningful results yet.


C. Michael Barton
Director, Center for Social Dynamics & Complexity
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State University

Phone: 480-965-6262
Fax: 480-965-7671
www: www.public.asu.edu/~cmbarton, http://csdc.asu.edu

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