The island of Nelson is situated around 7-8 miles far from the Egyptian Mediterranean coast, and about 25 km far from Alexandria of Egypt. It has small size, since it doesn't currently overcome the 350 m2 , even if in the antiquity it was greater: geologic phenomena and activity of cave sensibly reduced the emerged part of it. Campaigns of excavation were carried on that have brought to light important rests related to a fortification and to a military installation, inscriptions of Greek and Byzantine epoch, enormous complexes for the water restocking and a necropolis of late epoch. In the circle of the collaboration in the research CMAIA the geodetic and topographic survey of the island and of the principal structures of archaeological interest are realized. The activities of excavation have not always allowed a perfect synergy with the operations of survey. Nevertheless, the collected results have been integrated with paper maps compiled by draftsmen present on site during the p...