United States. Army Map Service. North Decimal Degree 38.0000. South Decimal Degree 37.0000. East Decimal Degree -6.0000. West Decimal Degree -7.0000. Alternate title: Huelva, 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 Iberian Peninsula, 1:250,000, GSGS, sheet S3624, 1941; Portugal, 1:250,000, Estador maior do Exercito, sheet 26, 1935; Spain, 1:50,000, Instituto Geografico, 1918-38; Spain, 1:200,000, Cuartel General del Generalisimo, 1901-16; Spain, 1:200,000, Instituto Geografico, PROVINCIA DE BADAHOZ, 1903; PROVINCIA DE CADIZ, 1935; PROVINCIA DE HUELVA, 1936; PROVINCA DE SEVILLA, 1935; Road Map of Spain and Portugal, 1:400,000, AMS, Sheets 48 and 50, Third Edition, 1943; Railways of Spain & 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, 1942, 1943.".