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Descriptions of major items in the UNT Libraries Government Documents Map Collection; links to selected map collections on the Internet.

About Topographic Maps


Topographic maps use contour lines to show the shape of the earth's surface.

7.5 Minute Topographic Maps

The United States Geological Survey began mapping the country in 1879 and has been the primary civilian mapping agency of the United States ever since. The best known USGS maps are the 1:24,000-scale topographic maps, also known as 7.5-minute quadrangles. In addition to elevation, they show such features as streets, buildings, streams, and woods. This is the only uniform map series that covers the entire area of the United States in considerable detail.

The National Map

The 7.5-minute map series was officially completed in 1992, and in 2001 the program was replaced by The National Map, which is a nationwide collection of integrated data from local, State, Federal, and other sources.

Obtaining Paper Topographic Maps

The UNT Libraries' Government Documents Department has 7.5-minute topographic maps in hardcopy for most of Texas, as well as for Oklahoma, Louisiana, Arkansas, and New Mexico. If you would like to see a topographic map for a particular area, ask for the map by quadrangle name at the Government Documents Service Desk.

To obtain free map indexes and catalogs, and to order topographic maps or any of the wide variety of thematic maps available from the USGS, contact:

USGS Information Services
Box 25286
Denver CO 80225

​1-888-ASK-USGS or 303-202-4700
Fax: 303-202-4693
Web site: Ask USGS

Visit the USGS home page at

Viewing Topographic Maps Online

Additional Links