Abstract

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.

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...