ADVANCED, MULTIDISCIPLINARY, INTEROPERABLE DIGITISATION OF CULTURAL HERITAGE AND USER-FRIENDLY USE OF THE RESULTS: CASE STUDY OF THE CATHEDRAL OF SANTA MARIA ASSUNTA IN CIVIDALE DEL FRIULI (UD)

Abstract. The Superintendency of Archaeology, Fine Arts and Landscape of Friuli Venezia Giulia has recently launched various studies and projects for the reduction of seismic vulnerability and the restoration of the region’s historical architectural heritage which, according to the indications of the Ministry of Culture, must be implemented in an exemplary manner both from a methodological and executive point of view. For the Cathedral of Santa Maria Assunta in Cividale del Friuli (UD), innovative solutions were sought right from the preliminary study phases, as well as new methodologies and technologies also in line with the indications of the European Commission (work programme 2018-2020 - LC-EEB-02- 2018: design and development of “kits” to support BIM Authoring for restoration and interventions on existing buildings). The use of relevant technologies such as laser scanners highlights the limitations of solid and/or parametric solid modelling (BIM) processes when applied to the built environment. These limitations arise mainly because the reality of the built environment does not correspond to an ideal geometric model, but has variations and irregularities that are difficult to reproduce through traditional modelling techniques.

Within this context, it was essential to adopt innovative 3D modelling techniques, in order to meet the required accuracy of ≤5 mm and to catalogue - accurately and in advance - the architectural, structural and decorative elements present so as to obtain an effective and efficient 3D model. The aim of this work is therefore to present a successful experimentation that can open up new perspectives in the field of threedimensional reproduction of architectural heritage. In particular, the combination of the use of advanced technologies with preventive cataloguing and innovative techniques of participatory 3D modelling (crowdsourcing), in order to obtain advanced 3D models that are highly accurate and informative, as also indicated by the aforementioned European Commission directives.