3D Integrated Survey for the Study of Archaeological Sites: the Case Study of Euryalus Castle in Siracusa

The present article deals with the results of a recent study conducted by the Laboratory of Representation at the University of Catania regarding the 3D modelling process of the archaeological site of Euryalus Castle in Siracusa. The purpose of the research was to discuss the survey methods implemented in the archaeological field, considering each methodology as a singular or as a multi-sensor approach. Digital integrated survey (rangebased and image-based methods) and, in particular, the UAS system (Unmanned Aerial System) reduce the problems connected with the survey of complex or large objects and increase capability exposure thanks to the high quality of 3D photorealistic technology. The traditional survey systems applied to the area around Siracusa and to the archaeological site have been integrated, in the present case study, with UAV (Unmanned Aerial Vehicle) photogrammetric survey for the acquisition of nadir and oblique imagery. The research shows that modern survey technology contributes to the digital 3D monitoring and documentation of cultural heritage.