Topographic base map series: GSGS 4072. Sheet: Strasbourg N.E. 48/6. Compiled and drawn at War Office 1940. Heliographed at Ordnance Survey 1940. Projection: Europe (Air) conical orthomorphic (central zone). Lattice overprint series: GSGS 4521. Overprint drawn at G.S.G.S.(A.M.) October 1944. Sheet: Strasbourg N.E. 48/6. Annotations: Latitude and Longitude parallel and meridian lines are emphasized with green and blue coloured pencil. Location: Research Collections, Gordon Griffith fonds.