[GRASS-user] r.param.scale->high plane as peaks?

Vaclav Petras wenzeslaus at gmail.com
Wed Apr 16 11:41:28 PDT 2014


r.param.scale should be the same in all the versions (and also manual pages
are all the same). I don't know r.param.scale much but whenever I'm using
it I getting almost no peaks. It looks similar to what is in the manual
page -- almost everything on hills is ridge, just time to time there is a
peak. Did you try playing with resolution (g.region res=)? If you are not
satisfied with r.param.scale, in addons for GRASS 7 there is r.geomorphons,
the results are usually very good if you play with parameters and




On Wed, Apr 16, 2014 at 2:38 AM, Patrick S. <patrick_GIS at gmx.ch> wrote:

> Dear List,
> In my test of r.param.scale on GRASS64 peaks are evaluated on basis of
> single cells and do not form areas. High plains, i.e. neighboring "peaks"
> with the same value get ignored, while the example picture shows such areas
> http://grass.osgeo.org/grass65/manuals/r.param.scale.html (only for
> GRASS65?).
> What would be the best way to find such grid cells and define peak-areas
> when needed?
> Thank you for your feedback,
> Patrick
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