Digital Maps and Geospatial Data | Princeton University

Skeleton map of the territory of the United States west of the Mississippi River : exhibiting the relations existing between lines and areas of explorations & surveys conducted under the auspices of the War Dept., giving the area of the public domain lying west of the 100th meridian of longitude, with an index illustration of a series of atlas maps proposed to be constructed on a scale of 1 inch to 8 mi. Image Public content