Scope and Contents From the Collection: The United States Geological Survey (USGS) 100,000 Scale Maps include 2,332 topographic maps. These maps are a part of the 1:100,000-scale series (where one centimeter is one Kilometer on the ground) 30 X 60 Minute Quadrangle map collection, which were created from the 1:24,000-scale topographic maps made by USGS between the years 1967-1983. The USU collection includes 76% of the 30 X 60 Minute Quadrangle maps known to be produced by USGS. For more information on USGS Topographic Maps and to...