The Arizona U.S. Geological Survey Topographic and Orthophotoquad Map Collection includes 2,100 maps mostly comprised of 7.5-minute, 1:24,000-scale, quadrangle, topographic maps that show both natural and manmade structures. The collection also includes Preliminary Editions and Provisional Editions of the 7.5-minute topographic maps, and Orthophotoquads which are 7.5-minute black and white photographs.