United States. Army Map Service. North Decimal Degree 44.0000. South Decimal Degree 43.0000. East Decimal Degree -4.0000. West Decimal Degree -5.0000. Alternate title: Torrelavega, 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, 1941-43; Spain, 1:40,331, Seccion Hidrografia, sheet 936, 1926; Iberian Peninsula, 1:250,000, Geographical Section General Staff, 1941, sheet 4888; Spain, 1:400,000, Instituto Geographico, Provincia de Oviedo, 1935, Provincia de Leon, 1937, Provincia de Santander, 1935; Road Map of Spain and Portugal, 1:400,000, A.M.S. sheets 41 and 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.".