Paolo wrote: > > What is in short, the difference between the two commands?
Markus N: > They are completely different. > > r.sunmask calculated the sun position for a given > date-time, optionally writing out > a sun cast shadow map (not shaded!) note that r.sun output maps can be used to good effect with the d.shadedmap module to make a "more-correct" version of a typical r.shaded.relief image. e.g. http://bambi.otago.ac.nz/hamish/grass/screenshots/deep_cove_rsun.jpg perhaps only worth it if you already have the r.sun result in hand. > r.shaded.relief generates a shaded relief from a DEM to be > used as background for other maps. (you can place the sun's angle in the sky at whatever angle you like, but the effect is purely a visual one; r.sunmask uses a real solar movement algorithm and outputs in shadow/out of shadow data map) Hamish ps- debian has a site set up where you can upload a screenshot of any package it hosts. I wonder what it would take to set up a similar thing for GRASS? so people could easily upload a screen shot of any particular module in action. http://screenshots.debian.net/package/grass http://debshots.workaround.org/trac/ (a javascript/Pylons [python web frameworks] dev volunteer would be needed) _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
