GEOMATICS FOR THE 3D SURVEYING AND MAPPING OF CONFINED SPACES: A CASE STUDY IN BOLOGNA (ITALY) - Tini, M. A.; Bucci, M.; Pagliarani, A.; Roggio, D. S.; Girelli, V. A.; Vittuari, L. (Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., 2023)