Due to the recommencing of methodical archaeological excavation on the site of Nora, first Phoenician then Punic and Roman town, situated on the southern coast of Sardinia approximately 30 Km west of Cagliari, it was necessary to establish a cartographic system extended to all the hill on which the settlement standed (the settlement had never been completely mapped). This system had to cover previously surveyed areas and to allow the continuous updating with data resulting from new excavations. With these requirements, a computerised cartographic system was created, which consisted of basic information regarding not only the archaeological remains, but also the modern topography and the morphology of the hill. The aim was to design an operating system practical both for research and for safeguarding the archaeological site and allowing planning of its infrastructure. The project has been carried out in several phases: a) planning of the cartographical base; b) aerial survey of the zone; c) aerophotogrammetric zone; d) implementation of the numerical cartographic system; e) layout of the archives. The aerophotogrammetric information produced numerical files containing 3D data for every mapped point; using this data it was possible to create 3D models whose use is not only for archaeological research but also for aiding in planning for future infrastructural intervention in the archaeological park.