United States. Army Map Service. North Decimal Degree 37.0000. South Decimal Degree 36.0000. East Decimal Degree -5.0000. West Decimal Degree -6.0000. Alternate title: Gibraltar, Spain. Polyconic projection. With Spanish-English glossary. Relief shown by 100 m. contour interval, gradient tint and spot heights. Standard map series designation: A.M.S. M581. "Compiled from Spain, 1:50,000, Instituto Geografico, 1916-18; Spain, 1:200,000, Instituto Geografico, Provincia de Cadiz, 1935, PROVINCIA DE MALAGA, 1935 and PROVINCIA DE SEVILLA, 1935; Road Map of Spain and Portugal, 1:400,000, AMS, sheet 50, Third Edition, 1943; Railways of Spain and Portugal 1:1,500,000, GSGS, 1942; Railways of Spain, Portugal and Southern France, 1:1,300,000, Military Railway Service, 1943. Partially revised from aerial photography, 1941-42, 1943.".