Mapping and Geospatial Imagery 

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This search box will let you search for maps in our collection using our 'new' catalog.  The guidelines to the right can help with your search.

Topographic maps of the United States  Known by various names: 7.5-minute series, each sheet or quadrangle shows 7.5 minutes of a degree of latitude North to South, and longitude West to East; 24,000 series, all sheets are at the uniform scale of 1:24,000 (exceptions, Alaska is at two smaller scales, Puerto Rico is at 1:20,000).  Covers all 50 states, and territories of Guam, Puerto Rico, and U.S. Virgin Islands.  Sets are arranged by state and by sheet name within the state set.  Index maps available for each state.  Series are listed in the Libraries catalog, with complete lists.  Find them in the catalog, here.  These sets include earlier editions, as well as the most recently available for each sheet.

Topo! CD-ROMs Topographic mapping for the 50 U.S. states is also available in a digital collection on CD-ROM.  Each set covers the entire state or group, with the most recent sheet available.  Display is seamless, with layers showing smaller scale maps.  Find these with a title search on the word Topo.

Other U.S. topographic maps, in sets at smaller scale than the main set.  The 15-minute series is the predecessor to the 7.5-minute sheets.  They were produced at approximately one inch to one mile, or 1:62,500.  Selected sheets from this set, dating from the 1910s to 1940s.  Another set, at 1:250,000, covers the entire U.S.  And a large set at 1:100,000, is also available.  These are not yet searchable in the catalog.  They are accessible, near the General Maps collection, and can be browsed.