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:

Mabel
Mackey
Macksburg
Macy
Madrid NW
Malcom
Mallard
Malone
Maloy
Malvern
Manchester
Manilla
Manly
Manning
Manning SE
Manson
Mapleton
Mapleton SE
Maquoketa
Marcus
Marengo
Marion
Marshalltown
Martensdale
Mason City
Mason City SE
Masonville
Massena
Matlock
Maurice
Maxwell
May City
Maynard
McCallsburg
McCausland
McClelland
McElroy Creek
McIntire
McPaul
Mechanicsville
Mediapolis
Medora
Melbourne
Melcher
Melrose
Melvin
Mendota
Menlo
Menominee
Merle Junction
Middle Amana
Milan
Miles
Milford
Miller
Millersburg
Millnerville
Milo
Milton
Mineola
Mingo
Missouri Valley
Missouri Valley NW
Mitchellville
Modale
Mondamin
Monona
Monroe
Montezuma
Monticello
Montour
Montpelier
Moorhead
Moorhead NW
Moorhead SE
Moorland
Moravia
Morley
Morning Sun
Morton Mills
Moulton
Mount Ayr
Mount Sterling
Moville
Mt. Pleasant
Mt. Vernon
Mt. Zion
Murray, IA
Murray, NE
Muscatine
Muscatine NW
Myrtle
Mystic