Hi all, I have a few images in floating point format from ERDAS Imagine and i intend to perform some operations on them using IDL. When i open the images in ENVI, there seems to be no problem. However, in a script i write in IDL, the output looks bizzare and looks nothing like what i expect. As a test, i converted my images into float again using band math in ENVI, ran the IDL script, and the output looks normal. The same images which as supposed to be of the same data types (floating point) yield different displays. The output when ERDAS (.img) float format is used looks like a bunch of tiles in a very linear fashion and is not the correct display of my study area. I want to know if any of you have an idea whether there is a difference between floating points images created in ERDAS or ENVI/ IDL ? Thanks.