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What geographic areas do 3D Elevation Program (3DEP) contours cover?

3D Elevation Program (3DEP) contours cover all of the United States and its territories at multiple scales:

  • Small scales (1:578,000-1:289,000)
  • Medium scales (1:144,000-1:72,000)
  • Large scales (1:36,000-1:18,000)

Contours are easily viewed in The National Map Viewer and USGS topographic maps, or downloaded through The National Map Download Client.

Learn more: Map Scales