Hello everyone, Help me please. Band math don't do what tell. I wrote an expression ((b1 le 1730)*2)+b1, it means that every value less than 1730 multiplys by 2 and then adds the original values. Simply, every value less than 1730 should be 3 times bigger. What the band math do, it adds value 2 to every value which is less than 1730 (for example, if the value is 101, now it is 103, but should be 303). For more information, for variable i'm choosing 48 band image. King regards, Skywalker