Hakim Benoudjit wrote > Hello, > > First of all, I'm new to this mailinglist and to GrassGIS in general. > > So, I'm trying to use the `r.sunmask` command in order to extract the > shadow from an `SRTM DEM` of the Alps mountains (Switzerland). > The image had to be first `reprojected` when I've imported it to a > `EPSG:21781` location, in order to get both the (lat, lon) in meters > (similarly to the elevation). > > Here is the command I'm executing (note that the time of the day was > chosen > at 09:00 in the morning to maximize the shadow): > > r.sunmask elevation=n46_e006_1arc_v3@PERMANENT output=alps-sunmask.tif > year=2014 month=9 day=23 hour=9 minute=0 timezone=1 > > > The problem I have is that the image produced is emtpy (no-data > everywhere). > Is there a parameter I'm forgetting to add to the `r.sunmask` command? > Or should I use `r.sun` command instead, even though I'm not sure about > the > parameters I should provide to it either ? > > Hakim.
have you set your computional region to your DEM by g.region? ----- best regards Helmut -- Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html _______________________________________________ grass-user mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-user
