It's very simple. It really just averages the values of raster
cells for a neighbourhood window of a size m x n. It then determines
how much the cell in the window center deviates from that average.
Add some normalization and you get a map that shows you which cells
stick out most. Use it on a map with elevation values and you
can (tentatively) call that topographic prominence.
The module lets you choose different window sizes and shapes and
whether to use local (within window) or global (over whole map)
normalization.
Ben
- Original Message -
From: Bulent Arikan bulent.ari...@gmail.com
To: grass-user-requ...@lists.osgeo.org, grass-user@lists.osgeo.org
Sent: Monday, November 23, 2009 7:46:52 PM GMT +01:00 Amsterdam / Berlin / Bern
/ Rome / Stockholm / Vienna
Subject: [GRASS-user] r.prominence
Hi,
I have been using r.param.scale and inverting DEM method for identifying
peaks. I am specifically interested in finding the high spots on a
landscape; not just the highest single cell. It has been suggested that
r.prominence may be of help. I realise that this comes in a file that needs
to be compiled (.c extension). Before compiling, I will appreciate any
insight on what it does.
Thank you
--
BÜLENT ARIKAN
School of Human Evolution and Social Change
Arizona State University
Tempe - AZ
85287-2402
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