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Use Databases to Find Maps
Map Sources Online
EROS Home Page
Site of U.S. Geological Survey's (USGS) Earth Resources Observation Systems (EROS) Data Center, otherwise known as the EDC.; a Photo Finder site for the National Aerial Photography Program; educational materials; and Earthshots, a "a collection of Landsat images and text, designed to show environmental changes and to introduce remote sensing."
Harvard Map Collection
A Harvard University site with geospatial data, images from the University's large map collection, and more.
The National Map
U.S. Geological Survey source for maps of all kinds, including topographic
Old Maps Online
A great, easy-to-use way to find old maps in digitized versions
PCL Map Collection
University of Texas site with many maps in electronic form, including historical maps. There are links to other map collections.
Topographic Maps from National Geo
National Geographic makes it easy to find a map, choose a quad, and print it in a format for ordinary-sized printer paper.
Topographic Maps via Geographic Names Information System
Search for a U.S. geographic feature, then click on a feature name in the list of results. A box will show mapping services that include USGS the National Map and Terrafly. Click to load map - may be slow downloading
University of Alabama Historical Map Archive
Images of thousands of historical maps. Use the Search the Site link to explore.
Find Books of Maps
Use this search box to find library materials on your subject.
Try a search combining subject key words and the word "atlases.', e.g.,
history civil war atlases