Hi Wolfgang, On Tue, May 19, 2015 at 2:09 AM, Wolfgang <[email protected]> wrote:
> Hello, > I would like to know if it is possible (and how) to generate the view to > mountain ridges as shown in > http://www.viewfinderpanoramas.org/panoramas.html > There are also nowadys some apps for smartphones which does the same. > I already found r.horizon but this is, at least as I understand, only the > view of the horizon and not all ridges. > I also found a paper on automatic ridge extraction, but it seems that this > never was included to grass: > > http://www.ing.unitn.it/~grass/conferences/GRASS2002/proceedings/proceedings/pdfs/Frigeri_Alessandro_2.pdf > Just a wild, not tested idea. You could try "reversing" the DEM and using the algorithm for stream extraction ..? cheers, Margherita Many thanks > Wolfgang > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > -- Best regards, Dr. Margherita DI LEO Scientific / technical project officer European Commission - DG JRC Institute for Environment and Sustainability (IES) Via Fermi, 2749 I-21027 Ispra (VA) - Italy - TP 261 Tel. +39 0332 78 3600 [email protected] Disclaimer: The views expressed are purely those of the writer and may not in any circumstance be regarded as stating an official position of the European Commission.
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