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:

La Moille
La Motte
La Porte City
Lacelle
Lacona
Ladoga
Ladora
Lafayette
Lake City
Lake Mills
Lake Park
Lake Park SE
Lake Thunderhead
Lake View
Lakefield SE
Lakefield SW
Lakeside
Lakota
Lamoni N
Lamoni S
Lamont
Lancaster
Lanesboro
Lansing
Lanyon
Larchwood
Latimer
Laurel
Laurens
Lawler
Lawton
Le Grand
Le Mars
Le Roy, IA
Le Roy, MN
Lebenon
Ledyard
Lehigh
Leighton
Leisure Lake
Lenox
Leon
Lester
Letts
Lewis
Libertyville
Lime City
Lime Springs
Lime Springs NW
Lincoln
Lineville
Little Cedar
Little Rock
Little Sioux
Littleport
Littletown
Livermore
Lockridge E
Lockridge W
Logan
Lohrville
Lomax
London
Lone Rock
Lone Tree
Lorimor N
Lorimor S
Loring
Lost Nation
Lourdes
Loveland
Lovilia
Lowden
Lowell
Lu Verne
Lucas
Luther
Luton
Lyle
Lytton