Integrazione della fotomodellazione nel processo di rilievo. Applicazioni alle costruzioni alpine tradizionali in pietra

This contribute shows the most significant results of the Interreg-AlpStone research in relation to the methods of survey for stone constructions. The Alpine territory located in the area between Italy and Switzerland presents a rich architectural heritage which has an important value both from the cultural (for the local traditions) and real-estate (for touristic and residential aims) points of view. In order to recover these typical buildings it needs in primis to find the survey methodology that best fits the goal. The buildings realized with stone materials are characterized, for their nature, by a high degree of irregularity, which is still more evident in abandoned buildings. This irregularity can’t be ignored because it could affect several aspects of the redevelopment (seismic and thermal renovation, space management,…). Techniques of survey with laser scanner and photomodelling have been tested. Photomodelling turned out to be a convenient technique because of its cheapness, its facility of use and its practicality in territories such as the Alpine ones, with impervious paths. The degree of detail of the photomodelling is lower than the one of laser scanner. Nevertheless, for the recovery, the survey based on the multi-images correlation turned out to be largely sufficient for a careful critical analysis of instabilities, deformations and inflections of the building components. The only inconveniences are the time employed for the photos snapshots and the difficulty in modeling the natural context near the architectural heritage.