This map depicts the corridor for flight navigation between Washington, D.C., and New York, New York. It includes major urban areas, roads,... Show moreThis map depicts the corridor for flight navigation between Washington, D.C., and New York, New York. It includes major urban areas, roads, railroads, etc., and the location of airfields, sea-plane landings, and navigation beacons. Apparently produced initially in 1929 for the Information Division of the Office of Chief of Air Corps in Washington, D.C., it was edited in 1932 and 1933. Show less