Relief shown by hachures and spot heights. Shows drainage, railroads, trails, Native American territories, and locations of historic events. From: Reports of Explorations and Surveys, to Ascertain the Most Practicable and Economical Route for a Railroad From the Mississippi River to the Pacific Ocean. 1 map; 54 x 46 cm This map is in the public domain. Please attribute access and use of this digitized map to the Stephen S. Clark Library, University of Michigan Library.