On Fri, Dec 20, 2013 at 4:54 PM, manuel.martin <[email protected]> wrote: > Hi all, > I just computed the slope using r.slope.aspect on the Aster data over the > full French territory, and as a result got large artefact stripes on a south > west-north east axe? When could it come from (inadequate re-projection, the > slope routine or the aster data)? > > The stripped result : > https://www.dropbox.com/s/fcxaei1be9wsmka/slopeFranceSmall.png > https://www.dropbox.com/s/b52k5co46ujmpt7/slopeFrance.jpg
ASTER data are not really suitable to derive a DEM, your example is another demonstration that an ASTER-derived DEM contains artefacts. SRTM DEMs are without these artefacts. Markus M _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
