3D SURVEY TECHNOLOGIES TO DOCUMENT AND SUPPORT MICAELIC RUPESTRIAN ARCHITECTURE PRESERVATION. A CASE STUDY

Abstract. The paper presents the actions conducted for case study of Hermitage San Michele a le Grottelle, in Padula (Italy) framework scientific collaboration between Urban\\Eco Interdepartmental Research Centre and Diocese Teggiano-Policastro focused on development specific programmes preventive conservation rupestrian heritage dedicated to micaelic cult. In this context, hermitage hosts precious wall paintings which show signs advancing non-uniform degradation: some frescoes are completely lost, unlike others that, despite being spatially adjacent, still intact.The investigation was oriented towards understanding reasons condition articulated 4 main actions: (i) digitisation site through use optical sensors, order obtain digital model geometric colour components asset; (ii) collection external environmental data statistical characterisation considering multiple parameters recorded as observations from several meteorological stations; (iii) manipulation reflectance informative material point view most degraded frescoes, correlated information well geological classification site; (iv) virtual simulation incidence surfaces 3D site, inserted real territorial determine relationship causality relative weight boundary conditions degradation phenomena found direct actions.