Ciao Antonio. @arctan I think is ok. It works but there are many negative values...I must investigate :) Meanwhile .... thanks Gabrlele -- View this message in context: http://osgeo-org.1560.x6.nabble.com/gdal-calc-py-IF-ELSE-Condition-tp5274166p5274178.html Sent from the GDAL - Dev mailing list archive at Nabble.com.