tiff over DEM

[Ken Hickey]

G'day   I am using ERMapper v.6.2 and I want to drape a digital orthoquadrangle airphoto in GeoTiff format (277Mb) over a DEM in ".ers" raster format (127Mb). I have both images registered to NAD27 UTM zone 11 and the DEM is set up as an intensity layer and the airphoto as a pseudocolour layer. However, the airphoto will not display as long at the DEM layer is turned on.   Is it possible to drape a single channel, greyscale, tiff image over an intensity layer?   Thanks in advance   Ken Hickey ------------------------------------------------------------------ Dr Kenneth Hickey Mineral Deposit Research Unit (MDRU) Department of Earth and Ocean Sciences University of British Columbia 6339 Stores Rd, Vancouver, BC  V6T 1Z4, Canada phone +1-604-822-3765; Fax +1-604-822-6088 email: [EMAIL PROTECTED]   .