Abstract The United States Geological Survey (USGS) 100,000 Scale Maps include 2,332 30 X 60 Minute Quadrangle topographic maps. These maps were created from the 1:24,000 scale USGS topographic maps with the purpose of land management, conservation, and outdoor recreation (Makower, 1990). Topographic maps feature contours that show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes that can be read using the map symbols key on each map. Most maps were...