Describes the exploration and mapping of the American West from prehistoric Indian maps through the geographical information gathered by the Spanish explorers, the expeditions of Lewis and Clark and Zebulon Pike, and the mapping done by the U.S. Army andthe railroad companies.Describes the exploration and mapping of the American West from Indian maps through the information gathered by the Spanish, the expeditions of Lewis and Clark and Zebulon Pike, and the work of the U.S. Army and the railroads.