Thanks a Lot Giuseppe.... Great link... but I have the question????? is possible calculated Standard Deviation with oft-cal..................... Regards -- View this message in context: http://osgeo-org.1560.n6.nabble.com/batch-for-mean-by-gdal-calc-tp4996911p4999080.html Sent from the GDAL - Dev mailing list archive at Nabble.com.