Scale 1:4,707,648 or 74.3 miles to the inch. National Geographic Society, Washington, 1965. Compiled and drawn in the Cartographic Division of the National Geographic Society for the National Geographic Magazine. Washington, January 1965. Viet Nam, January 1965, The National Geographic Magaz...
Sheet 2501 Batan Island PCGS First Edition 1965. PCGS 2501. First edition May 1965. Compilation 1954 AMS, PCGS, Corps of Engineers AFP, USC&GS, Bureau of Public Highways, and other agencies: medium-scale hydrographic chart 1929, small-scale hydrographic chart 1938, planimetry revised from 1948 aerial photography. Published PCGS.
Sheet 2502 Calayan Is PCGS First Edition 1965. PCGS 2502. First edition May 1965. Compilation 1954 AMS, PCGS, Corps of Engineers AFP, USC&GS, Bureau of Public Highways, and other agencies: medium-scale hydrographic chart 1940, small-scale hydrographic chart 1938, planimetry revised from aerial photography 1946 and 1947. Published PCGS.
Sheet 2506 Ilagan PCGS First Edition 1964. PCGS 2506. First edition December 1964. Compilation 1954 AMS, PCGS, Corps of Engineers AFP, USC&GS, Bureau of Public Highways, and other agencies: large-scale topographic maps 1945 and 1947, medium-scale hydrographic chart 1938, planimetry revised from 1946-51 aerial photography. Published PCGS.
Sheet 2512 Daet PCGS First Edition 1964. PCGS 2512. First edition August 1964. Compilation 1954 AMS, PCGS, Corps of Engineers AFP, USC&GS, Bureau of Public Highways, and other agencies: large-scale topographic maps compiled 1944-45, medium-scale hydrographic chart 1938, planimetry revised from 1946-48 and 1950-52 aerial photography. Published PCGS.
Sheet 2515 Lucena City PCGS First Edition 1964. PCGS 2515. First edition August 1964. Compilation 1954 AMS, PCGS, Corps of Engineers AFP, USC&GS, Bureau of Public Highways, and other agencies: large-scale topographic maps photogrammetric 1952, large-scale topographic maps compiled 1944 and 1944-45, medium-scale hydrographic charts 1938-41, planimetry revised from aerial photography 1946-47, 1948, 1950 and 1951-52. Published PCGS.