GSGS series 4414. Sheet 4014, Second Edition (A.E.F.). First edition copied from German Topographisce Karte 1:25,000 Sheet 4014 dated 1936 and photolithographed by the British Ordnance Survey in 1944. Second edition revised from air photographs October 1944 (519 RE). Lambert modified conical orthomorphic projection. Nord de Guerre Grid.