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Mapping and Geospatial Imagery: How to Find Topographic Maps

Topographic Maps

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.

New U.S. Topographic maps in the 7.5-minute series are produced in PDF format, and are available for free download from USGS.

New 7.5-minute series maps are available in PDF format. The Map Locator and Downloader Use the Navigator to zoom in, out, or pan the map to your location.  Use the Mark Points to select places.  7.5-minute grid appears.  Click on points you mark to see files available, and to download.

The files are in GeoPDF format, fully georeferenced, and with an orthophoto image layer.

Earlier editions of the 7.5-minute series, along with 15-minute maps from the early 1900's, are available here as well.  Also georeferenced.

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.  Produced at ca. 1 inch to 1 mile, or 1:62,500.  Selected sheets,1910s to 1940s.
  •      Another set, at 1:250,000, covers the entire U.S.
  •      A large set at 1:100,000, is also available.

Subject Guide

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Ginny Boehme
Contact:
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