I'm having a real problem getting my DEM to work in ENVI. I had a .dem which I made with the latticedem tool in ArcInfo Workstation from a grid file. It worked until it suddenly became corrupted and I had to try to make a new one. I'm having licensing conflicts with ArcInfo Workstation now and was wondering if there is any other source for a DEM that ENVI doesn't have problems with. I've tried converting the DEM to tiff but keep receiving the same error that the image and the DEM do not overlap when I know they do and are both in the same projection. Any thoughts would help. Especially a link that has 1/3 arc second DEMs of Nevada in a format that ENVI can tolerate.