Digital Elevation Models (DEM) are digitized versions of USGS's 7.5 degree topographic maps. With the help of additional software, they may be used to automatically define the base elevations for objects included in air dispersion modeling analyses. These DEM files can be downloaded from this website below. All DEM files on this site are listed based on the letter they begin with and are named based on the USGS quadrangle they represent.

Choose the letter with which the name of the quadrangle begins:

Choose the DEM file you wish to download:

Kahoka
Kahoka SE
Kalona
Kanawha
Kanawha SE
Keithsburg
Kellerton
Kellogg
Kent
Keokuk
Keosauqua
Keota
Keswick
Keystone N
Keystone S
Kieler
Kiester
Killduff
Kilwinning
Kimballton
Kingsley
Kingsley NW
Kingston
Kinross
Kirkville
Kiron
Klondike
Knierim
Knoxville
Knoxville NW
Knoxville SW