Main features of a 3d gis for a monumental complex with an historical-cultural relevance

The last achievements of technologies in geomatics especially in survey and restitution of 3D models (UAV/drones andlaser scanner technologies) generated new procedures and higher standards of quality in representation of archaeological sites. Together with Geomatics, the recent development of Information and Communication Technologies (ICT) strongly contribute to document and the Cultural Heritage (CH). The representation and documentation of CH using these new technologies has became necessary in orderto satisfy different needs: -for restorers in order to acquire a deep knowledge of the cultural good and to define possible strategiesof restoration; -for the conservation of information, allowing to preserve the 3D geometry of the monumental complex with the integration of descriptions about architectural elements; -for touristic aims, giving the opportunity of sharing CH information on web, allowing users to visit and explore, in a virtual way,monumental complexes, acquiring information details about architectural elementsorthe history of monumental complex. Looking through these new scenarios, the development of a 3D Geographic Information System (GIS) applied to a cultural good could be,today,an added value of fundamental importance for full description and data managementof monumental complexes. In this work,the main features necessary for the correct construction of a 3D GIS of a monumental complex will be analyzed, with a particular focus on the possibilities for creating a standardized procedure to follow.