AGRC has been populating its FTP site with DEMs for the State of Utah. There is currently a statewide coverage of 10, 30, and 90 meter dems. They are in a self extracting format (.exe).
In order to make the .dem file useable it needs to be converted into a Raster/Grid. In the ArcMap 9.x toolbox use the Conversion Tool - DEM to Raster. With ArcInfo workstation use the DEMLATTICE command. Make sure your folder names or directory structure does not contain spaces.
When downloading the DEMs from this site make sure they have not been renamed to a .txt extension ie. o11340.exe.txt. If they have the .txt extension simply rename to only have the .exe extension ie. o11340.exe.
The DEMs are separated into three directories. For 10 and 30 meter DEMs refer to Find_a_DEM.txt for USGS Quadrangle names and associated DEM name. For 90 meter DEMs refer to 90meter_dems.jpg.
10meter_dem - 10 meter resolution 7.5 minutes 24k blocks
30meter_dem - 30 meter resolution 7.5 minutes 24k blocks
90meter_dem - 90 meter resolution 1x1 degree 250k blocks
All DEMs are UTM Zone 12 NAD83 meters. The vertical datum is NGVD 29.
For more DEM information go to: http://edc.usgs.gov/guides/dem.html . If you have any trouble contact
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at 801-538-3237
