This map depicts the corridor for flight navigation between Omaha, Nebraska, and North Platte, Nebraska, including major urban areas, roads,... Show moreThis map depicts the corridor for flight navigation between Omaha, Nebraska, and North Platte, Nebraska, 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 Topographic Branch, U.S. Geological Survey, under the direction of the Airways Section of the Chief of Air Corps in 1925. Show less