AN INTEGRATED APPROACH AIMED AT THE PROTECTION OF CULTURAL HERITAGE: FROM THE GEOMATIC SURVEY TO HBIM AND AR REPRESENTATION OF VILLA PISANI (STRA, ITALY)

Abstract

The topic of Cultural Heritage preservation has gained an increasing attention during last decades. The protection of such complex and delicate manufacts require the intervention of experts from different field (e.g. archaeology, restoration, survey, 3D modeler, structural engineering, architecture), addressed towards an integrated and multidisciplinary scientific approach. Recently, technology advancements have involved many scientific disciplines, affecting both the investigation tools and the data computing. In this paper, an approach aimed at assessing the health status and preserving a heritage building is presented and applied to a case study, exploiting the most effective tools nowadays available. Based on the so-called knowledge path, the study started from the analysis of historical data, through the collection of in-situ measures and towards the construction of a 3D digital model where the information is stored. In particular, a set of images taken by drone and processed by the photogrammetric technique of Structure from Motion, were used to produce detailed point clouds, mesh model, DEM and orthophotos that collect an accurate geometrical documentation, useful to analyse the conservation status and the crack pattern. Based on the detailed model from geomatic survey and drawings, a Heritage Building Information Modelling (HBIM) database was collected with the possibility of managing historical, geometric, structural and health status information. In the end, the study focused on the availability of the information collected for non-professional users or professionals from different fields, who do not have access to data kept in commercial database. Partly, this resulted in the elaboration of an augmented reality (AR) model, accessible by common mobile applications. The case study is Villa Pisani in Stra (Venice, Italy), a well-known example of venetian villa built in the XVIII century which hosted many protagonists of the European contemporary history.