[GRASS-user] Profile and tangential curvatures in r.slope.aspect

Michael Barton michael.barton at asu.edu
Fri Oct 13 02:01:23 EDT 2006

I should check Mitasova and Neteler to be sure, but I'm pretty sure that
tangental curvature refers to a change in slope angle in the orthagonal
direction to the slope (i.e, in the direction of aspect).

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

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton

> From: Aldo Clerici <alcl01 at ipruniv.cce.unipr.it>
> Reply-To: <aldo.clerici at unipr.it>
> Date: Thu, 12 Oct 2006 16:41:23 +0200
> To: <grassuser at grass.itc.it>
> Subject: [GRASS-user] Profile and tangential curvatures in r.slope.aspect
> Thanks to everybody for the exhaustive and quick answers.
> Now it is clear enough to me how curvatures are computed in r.slope.aspect
> (as very well explained in the appendix B.3 in Mitasova & Neteler).
> I have a last question regarding the measure units. A tangential curvature
> of 0.1 means that the aspect changes of 0.1 degree in a planar distance of 1
> meter? And a profile curvature of 0.1 means that the slope angle changes of
> an amount of 0.1 degree for each meter of elevation difference?
> Thanks again and my best regards
> Aldo Clerici
> Parma University

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