Summary: | Various editions. Relief shown by contours, hachures, form lines, hypsometric tints, and spot heights.; Maps originally compiled by U.S. Coast and Geodetic Survey.; Projection: Lat 0° to 75°, Lambert conformal conic. Lat. 75° to 98°, Polar stereographic.; Some sheets without aeronautical overprint.; Index to adjoining sheets.; Early editions of sheets named but not numbered. Later editions numbered (AP-1 to AP-43) and named; National Library of Australia has some sheets acquired by arrangement with Scientific Committee on Antarctic Research (SCAR). ANL. U.S. Army Air Forces aeronautical planning chart U.S. Air Force aeronautical planning chart Air Force aeronautical planning chart USAF aeronautical planning charts
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