The Complex of Santa Croce in Ravenna as a Case Study: Integration of 3d Techniques for Surveying and Monitoring of a Historical Site

Abstract

Over the last decades, climate change has brought more and more challenges to managers of cultural heritage and researchers. The increasing effects of natural hazards on assets have required the development of a new protocol of techniques and methodologies for the monitoring of Cultural Heritage and the adoption of management plans adapted to the new challenges at every stage of risk management. The work here presented aims at providing an insight of the work undertaken under the framework of the H2020 SHELTER project, to showcase the first steps of the multi-disciplinary research conducted in one of the project’s case studies, the complex of Santa Croce in Ravenna, Italy. The paper provides the presentation of the case study and the description of the surveying activities with some first results, to provide a preliminary assessment of the site criticalities to be addressed in the future activities in the area, in line with the EU project expected outcomes.

Multitemporal Thermal Imagery Acquisition and Data Processing on Historical Masonry: Experimental Application on a Case Study

“…This is the case of the Complex of Santa Croce, a UNESCO site since 1996. The site is located in a low-lying area affected by subsidence, and the floor of the Church, which is about 1.30 m above the sea level, is often flooded [7]. Due to its structural characteristics, the Church in the Complex is strongly affected by this form of degradation.…”

“…From the survey, a point-cloud of about 20 million points was produced. The survey performed with the F6 scanner was aligned with the survey previously conducted by the Geomatics group with a laser scanner, photogrammetry, Total Station and GNSS [7].…”

“…Sustainability 2022, 14, x FOR PEER REVIEW 2 of the project, a multidisciplinary study was carried out to analyse all the risk facto the complex [6]. A critical point was to establish a reliable geometric knowledge b derived from the application of a rigorous survey integrating many geomatic techniq To complete the survey activities held by the Geomatics Group of the Interdep mental Centre for Industrial Research in Building and Construction and of the Dep ment of Civil, Chemical, Environmental and Materials Engineering (DICAM) of Uni sity of Bologna [7], an active thermal survey was carried out. A previous survey camp involved the integration of different techniques (laser scanner, terrestrial and aerial p togrammetry, topographical surveys by total station and GNSS) to build a three-dim sional model of the Church of Santa Croce.…”

“…Active thermogra allows much more information to be acquired as it studies the behaviour of the dete object during a defined time period. Moreover, image processing and data mining t niques can be successfully applied to this type of dataset to produce informative m Indeed, image classification helps the transformation of the collected multitemporal ages into meaningful and easy to interpret information about the investigated surfac To complete the survey activities held by the Geomatics Group of the Interdepartmental Centre for Industrial Research in Building and Construction and of the Department of Civil, Chemical, Environmental and Materials Engineering (DICAM) of University of Bologna [7], an active thermal survey was carried out. A previous survey campaign involved the integration of different techniques (laser scanner, terrestrial and aerial photogrammetry, topographical surveys by total station and GNSS) to build a threedimensional model of the Church of Santa Croce.…”