Thank you for the attention Moritz. I understand MASK as a boolean map with (let's say) "1" (for true) and "0" (for false).
The r.info (the one I provided in my previous e-mail) is about the raster data I want to use to create a MASK and not the MASK itself. Should I understand that only "integer" raster data are suitable to create a MASK? I understand (reading the r.mapcalc functionality) that one can use any kind of raster data (floating point) and create a MASK which contains a "1" for the pixels that have any value besides "NULL". So I expected to have a "1" wherever there was a value in my NDVI2006 file. Maybe I use it wrong(?) Should I specify to assign a value of "1" for all non-NULL source pixels? I'll try with "mask = a != 0" as described in the r.mapcalc manual. Thanks, Nikos _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
