This map depicts the corridor for flight navigation between Washington, D.C. and Uniontown, Pennsylvania, and Wheeling, West Virginia, including... Show moreThis map depicts the corridor for flight navigation between Washington, D.C. and Uniontown, Pennsylvania, and Wheeling, West Virginia, including major urban areas, roads, railroads, etc., and the location of airfields, sea-plane landings, and navigation beacons. It was compiled and produced by the Topographical Branch, U.S. Geological Survey, 1923, and revised by Engineer Reproduction Plant, U.S. Army, 1927. Show less