Topographic Science

http://pubs.usgs.gov/fs/2010/3049/

Explains and illustrates the types of topographic information USGS obtains, how we use this information, and how to obtain topographic data for your own work.

by Poppenga, Sandra; Evans, Gayla A.; Gesch, Dean B.; Stoker, Jason; Queija, Vivian R.; Worstell, Bruce B.; Tyler, Dean; Danielson, Jeffrey J.; Bliss, Norman B.; and Greenlee, Susan K.

U.S. Geological Survey Fact Sheet 2010-3049