[GRASS-user] how to find peaks

[Dylan Beaudette]

On Wednesday 18 November 2009, Michael Barton wrote:
> Beyond r.param.scale, is there a good method anyone knows of to find
> peaks or hilltops? I'm more interested in the tops of hills/high
> points than the single cell that is the highest.
>
> Thanks
> Michael

Hi,

The r.param.scale uses some common cuttoffs for curvatures to define features. 
A geomorphic classification may accomplish what you are looking for, i.e. 
generate some training areas that define 'summits', through in several 
terrain-shape indices, and then run a supervised classification. Unsupervised 
classification can sometimes work well for this kind of task, however it is 
data-driven and results can vary from location to location.

Cheers,
Dylan



> ____________________
> 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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-- 
Dylan Beaudette
Soil Resource Laboratory
http://casoilresource.lawr.ucdavis.edu/
University of California at Davis
530.754.7341