A map from 1910 of the United States showing general elevations, water depths, watershed boundaries, and terrain features, including the Pacific Slope, Great Basin, Colorado Plateau, Cordilleran Highlands, Rocky Mountains, Great Central Plain, Mississippi Valley, Gulf Coastal Plain, Great Lakes, Appalachian Highlands, and the Atlantic Coastal Plain. The map is color-coded to show land elevations from sea level to over 8,000 feet, and water depths to over 6,500 feet, illustrating the submerged continental shelf and the submerged Florida platform.