GSGS series 4229. Second Edition (Coloured)-AMS 1. Copied from an Italian Istituto Geografico Militare map dated 1919 with principal communications revised to 1939 using smaller scale maps and air photos. Compiled by the U.S. Army Map Service but photolithographed by the British Ordnance Survey in 1943. Information shown in black is taken from smaller scale material and its position is approximate. Road classification is NOT based on reconnaissance, reliability is uncertain. The meridians are based on the meridian of Rome, which is 12 degrees, 27 minutes and 7.1 seconds east of Greenwich. Contours at 10 metres (V.I.). South Italy Grid (Blue).