United States. Army Map Service. North Decimal Degree 39.0000. South Decimal Degree 38.0000. East Decimal Degree -9.0000. West Decimal Degree -10.0000. Alternate title: Lisboa (Lisbon), Portugal. Polyconic projection. With Portuguese-English glossary. Relief shown by 100 m. contour interval, gradient tint and spot heights. Standard map series designation: A.M.S. M581. "Compiled from Portugal, 1:50,000, Instituto Geografico, 1920-35; Portugal, 1:100,000, Instituto Geografico, sheet 38, 1930; Portugal, 1:250,000, Estador Maior do Exercito, sheet 16, 1937 and sheet 20, 1936; Road Map of Spain and Portugal, 1:400,000, AMS, sheets 46 and 48, Third Edition, 1943; Railways of Spain and Portugal 1:1,500,000, G.S.G.S., 1942, corrected from Intelligence Reports, 1942-1943. Partially revised from aerial photography, 1942-43.".
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