Digital Elevation Model

Traditional Digital Elevation Model (DEM) datasets correspond to 1:24,000 to 1:250,000 map scale.  Multiple source data, including USGS topographic sheets, and various methods were employed to create the integer values in the raster files.  The data are produced in UTM projection, NAD27 or NAD83 datum.  For additional information or to obtain DEM data, see:

USGS

• Digital Elevation Models Fact Sheet and Ordering Information
• DEM data in Native format (.dem) or Spatial Data Transfer Standard (SDTS) format

USDA Geospatial Data Gateway