On Tue, May 17, 2011 at 10:57 PM, Elena Mezzini <[email protected]> wrote: > Elena Mezzini wrote: >> Markus Metz-2 wrote: >>> >>> On Tue, May 17, 2011 at 10:08 PM, Elena Mezzini >>> <[email protected]> wrote: >>>> >>>> On Tue, May 17, 2011 at 9:22 PM, Elena Mezzini >>>> <[email protected]> wrote: >>>>> Hi all, >>>>> I'm once again in trouble with i.atcorr in GRASS6.5.svn. >>>>> I notice that my output reflectance images are strange: there are some >>>>> areas >>>>> that are really bright and other that are really dark. Both seem to >>>>> match >>>>> with my DEM raster. >>>>> Could there be problems with negative values in DEM?? I'm in a coastal >>>>> area >>>>> and there are some real altitude negative values. ... ... >> g.region rast=dem_sross_srtm >> r.mapcalc "dem_sross_srtm_pos = if(dem_sross_srtm < 0, 0, dem_sross_srtm)" ... > No differences between negative and positive values...
What do you mean precisely? Markus _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
