[GRASS-user] i.atcorr negative DEM

Elena Mezzini elena.mezzini at gmail.com
Tue May 17 15:22:03 EDT 2011


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.
If you need, this is my r.info of the DEM.

http://osgeo-org.1803224.n2.nabble.com/file/n6374760/rinfodemsrtm.txt
rinfodemsrtm.txt 

Hope that someone could help me..

Thank you!
Elena

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