HBIM to recovery the trulli in Apulia (Southern Italy)

This contribution describes an ongoing research conducted by the ISPC - CNR of Lecce, relating to the implementation of a project with BIM software and related to the recovery of n. 3 trulli located in Apulia in the countryside of Martina Franca (Taranto - Southern Italy). Research aimed at the restoration and related scheduled maintenance of the same. HBIM (Historical or Heritage Building Information Modeling) is a process applied to existing buildings that increases the potential of the BIM method, extending its use to the creation of models of existing buildings. The technologies of digital photogrammetry and laser scanner detection are used to collect information in the HBIM, which also thanks to the possibility of associating geometric information with images, make it possible to obtain a virtual model faithful to reality. From the processing based on the survey data, we then move on to the creation of libraries with parametric objects that represent all the components of the artifact. The step to get to the true digitization of the model consists in the reconstruction of the BIM model of what was detected. In fact, from a three-dimensional surface that depicts the surveyed work it is necessary to create a parametric 3D model. Through the merger of the data, an HBIM model is thus constructed that contains all the information relating to the history of the building, from which the production of technical drawings, 3D documentation, sections, details and schedules will derive. In conclusion, the geometric models thus obtained, through the surveys, must constitute indexes of contents, with data that can be consulted regarding the history, technical characteristics of the individual components, the state of deterioration of the work, in short, a range of information, all included in the associated database, and therefore usable at multiple levels of interest.