PHOTOGRAMMETRIC 3D INFORMATION SYSTEMS FOR THE MANAGEMENT OF MODELS OF CULTURAL HERITAGE

Abstract. The research on 3D photogrammetric information systems, for the management of digital models of Cultural Heritage, addresses several objectives in the field of digitization and three-dimensional modeling of heritage. The study is conducted through detailed and accurate photographic and iconographic documentation, survey and digital documentation with accessible models. The present work, therefore, proposes to document and reconstruct graphically, the historical evolution of the Hvar Tvrdalj Fortress in Croatia through a series of digital drawings, but especially 3d photogrammetric modeling systems of outdoor spaces. Particular attention was paid to the digital modeling activities of the fishpond, located inside the fortified structure. The activity of representation of the Fortress of Hvar Tvrdalj was set up by providing, in an initial phase, the execution of a basic survey extended to the architectural organisms and the surrounding green space in order to define a first two-dimensional geometric model; then, in a second phase, were made the survey graphs and the consequent graphic restitution with the measurements of architectural details and the complete survey of the inner tank. The research, therefore, presents for the first time, a scientific study of photogrammetric digital survey developed through the creation of 3D digital models on a structure of great architectural and landscape interest, as well as a cornerstone of the island of Hvar for local tourism.