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This group of map cases house the U.S. Geological Survey 7.5 and 15-minute topographic quadrangles covering western U.S. states from the Rocky Mountains to the Hawaii. The collection is historic dating back to the late 1890's. The set also includes quadrangles published by the Corps of Engineers, the Army Map Service, and the Defense Mapping Agency.
Sample Index Map
15-minutes of longitude
15-minute quadrangles were published from 1895 to the 1960's
|More information is available on Topographic Maps|
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