Orthophotomapping for Prudhoe Bay Development

by Thomas J. O'Brien, (A.M.ASCE), Alaska Resident Engineer; Topographic Division, Geological Survey, U.S. Dept. of the Interior, Anchorage, AK,

Serial Information: Journal of the Surveying and Mapping Division, 1971, Vol. 97, Issue 2, Pg. 199-204

Document Type: Journal Paper


Rothophotomapping on Alaska's North Slope combined the imagery from an aerial photo that is free of distortion due to camera tilt and terrain relief with some conventional topographic mapping symbols to yield a portrait of the land more complete and realistic than possible by conventional maps. It is particularly suited to the North Slope because significant terrain features such as drained thaw lakes and ice-wedge polygons have no line map symbol. The U.S. Geological Survey is processing with a project to prepare 12 orthophotomaps at 1:24,000 scale of a 550 sq mile area at oil-rich Prudhoe Bay. High altitude photography, only recently obtainable by commercial contract, was acquired with flight line planning and photo spacing to give complete coverage of a 1:24,000-scale quadrangle on a single photograph.

Subject Headings: Mapping | Bays | Slopes | Terrain | Distortion (structural) | Cameras | Topography | Drainage

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