Thanks Martin, I'll have a look at terrain analysis in grass. See
what I can come up with.
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.
I should have elaborated further.
Minimum height of peak, meaning do not classify any peaks below a set
minimum threshold : 1000 m for instance.
Minimum drop of surrounding peaks
Not sure what you mean here too.
Meaning a peak is not extracted if there are surrounding elevations
within a minimum drop amount
eg. 50m or 100m (depending on accuracy of DEM file and refinement
desired of distinct peaks)
summit points
optional hierarchy...
I guess these are technical mountaineering terms? So again I'm not
sure what
data you are hoping to extract.
Summit points.... The highest point on a peak.
So a peak encompasses all vertical surface areas within the "Summit"
point based on the above two categories.
I suppose I define a peak as a categorical area, and a summit as a
point. Perhaps there are better definitions.
Hierarchy in my mind would be to classify peaks within peaks. Based
on the initial two parameters (Minimum height of peak, minimum drop
of surrounding peaks)
I suppose I should draw a picture :) probably make more sense.
Thanks!
Mars
On 1-Jul-07, at 10:03 PM, Michael Barton wrote:
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
__________________________________________
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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