Hey BigAl, when I download the GeoTIFF (TIF), or DEM GeoTiff (TIF) files, all I get is a black and white image (see attached). The Colorized DEM GeoTIFF (TIF) works fine. I've tried to open in photoshop elements, but it says it is unable to open HDR files (need CS2). Any thoughts on how to open/read these files properly? Are these files NDVI/VARI files?