UAVs for the visualization, preservation, and sharing of “lost” eighteenth century fortified system on Monte Urpino hill in Cagliari (Italy)

A photogrammetric survey with the use of the drone is been applied in the study of the historical military landscape of Cagliari and of its disappeared architectures whose traces are preserved in the current urban context; it is possible to identify original position, consistency and elaborate a digital representation of these works thanks to a methodology structured on the following several phases: analysis and comparison of historical maps and study of other archival documents, integrated digital survey with UAV’s application supported by field verification of traces detected, elaboration of the digital model from which to extrapolate 2D and 3D drawings useful for further analysis and hypothesis, representation and dissemination of the results.