United States. Army Map Service. North Decimal Degree 44.0000. South Decimal Degree 43.0000. East Decimal Degree -3.0000. West Decimal Degree -4.0000. Alternate title: Santander, 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, 1931-42; Iberian Peninsula, 1:250,000, Geographical Section General Staff, 1941, sheets S4888, 6088; Spain, 1:200,000, Cuartel General del Generalisimo, sheets 5, 1921, 15, 1923; Spain, 1:100,000, Mapa Topografico de Vicaya, 1927; Spain, 1:400,000, Instituto Geografico, Provincia de Santander, 1935; Road Map of Spain and Portugal, 1:400,000, A.M.S. sheet 42, Third Edition, 1943; Railways of Spain and Portugal 1:1,500,000, G.S.G.S., 1941, corrected from intelligence Reports, 1942-44. Partially revised from aerial photography, 1942.".