A.M.S. (Series) ; L751. "AMS 4". Transverse Mercator projection. "Prepared by the Army Map Service (AM), Corps of Engineers, U.S. Army, Washington, D.C. Redrawn in 1950 from Korea, 1:50,000, Japanese Imperial Land Survey, Chumunjin, 1939. Planimetric detail revised by photo-planimetric methods. Coastal hydrography compiled by the U.S. Hydrographic Office from USHO Chart No. 3319, 1905-08. Aerial photography Mar., May, Oct. 1947 and May 1948." Map's lower edge lacking, cropping some marginal content. On verso: sheet 7026 III, Samch'ŏk, from Korea 1:50,000 set.