Provisional GSGS series 4229. Second Edition (Coloured) First U.S. Edition-AMS 1. Copied from an Italian Istituto Geografico Militare map dated 1896 using air photos. Compiled by the U.S. Army Map Service in 1943. 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 25 metres interval. South Italy Zone Grid (Blue).