On 7/1/07 5:46 PM, "Amagine" <[EMAIL PROTECTED]> wrote:
> Hello, I am trying to extract peak points from a digital elevation map.
(GUI menu: raster>terrain analysis>terrain parameters)
r.param.scale input=DEM output=feature.map param=feature
This will ID peaks, ridges, passes, channels, pits, and planes
>
> I would like to be able to regulate the following parameters:
>
> Minimum height of peak
A topographic "peak" will have an elevation, not a range of elevations. So
I'm not sure what you mean.
> Minimum drop of surrounding peaks
Not sure what you mean here too.
> Minimum radius from surrounding peaks
use r.distance or convert to vector and use v.distance
> summit points
> optional hierarchy...
>
I guess these are technical mountaineering terms? So again I'm not sure what
data you are hoping to extract.
> Are there any tools in GRASS that may be able to do such an extraction?
Probably a way to get all this information in GRASS
Michael
>
> Thank you.
>
> Mars
>
>
__________________________________________
Michael Barton, Professor of Anthropology
Director of Graduate Studies
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
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