The aerial photogrammetric survey for the documentation of the Cultural Heritage: The Verruca Fortress on the pisan mountains

paper describes the digital survey project of the Verruca fortress, which is located on the summit of Monte Serra, in the Pisan mountains. Today the fortress is in a state of ruin, and recently a summer fire caused the loss of the vegetation that had massified around the building, thus allowing to program the analysis of the walls of the fortress to deepen its construction history and state of material and structural conservation. the fortress survey project integrates range based, image based and UAV technologies, focusing attention on the methodologies used to ensure the high morphological reliability of the data obtained from the survey, in a very complex area to reach. The results of the survey made it possible to reconstruct a whole series of graphical drawings that made it possible to deepen the architectural and historical analyzes on the fortress.