Abstract
Abstract. The conservation of built heritage is a complex process that necessitates co-operative efforts. Holistic, integrated documentation constitutes a crucial step towards conservation by contributing to diagnosis and by extension to the effective decision-making about the required preventive and restorative interventions. It involves the recording of interdisciplinary data to produce objective diagnostical conclusions concerning the state of preservation. Although the developments in close-range sensing techniques allow increasingly accurate and rich data recording for heritage building condition surveys, the problem of combining them (to allow integrated processing) often remains unsolved. This is particularly true when surveys include vastly heterogenous documentation data. This work aims to discuss methodologies and implications of such integrations through a monumental heritage survey case – the Castello del Valentino in Turin (Italy). Visible-spectrum and infrared imagery is combined with photogrammetric techniques, terrestrial LiDAR, and microwave measurements conducted on the historical façades’ surfaces, to examine the comprehensiveness of the data fusion results, as well as conclusions that can be drawn regarding previous interventions and the current condition of the monument.
Highlights
Built heritage conservation has significant educational, social, touristic, and political value, contributes to the environmental and financial sustainability of a location, and to the sense of place through the architecture’s visual aesthetic and cultural attributes (Lichfield et al, 1993; Worthing and Bond, 2008)
Techniques proven to be efficient for architectural documentation involve close-range photogrammetry (CRP), terrestrial laser scanning (TLS), and combinations of both (Georgopoulos, Stathopoulou, 2017)
The combination of metric data with multi-wavelength results derived by laser scanning, imaging, thermography, and Ground-Penetrating Radar (GPR) surveys enhances the richness of recorded information for historical architecture and adds to data validity, integrated processing, and facilitates interdisciplinary interpretation
Summary
Built heritage conservation has significant educational, social, touristic, and political value, contributes to the environmental and financial sustainability of a location, and to the sense of place through the architecture’s visual aesthetic and cultural attributes (Lichfield et al, 1993; Worthing and Bond, 2008). Recording built heritage information is an integral part of conservation and facilitates monitoring, management, and routine maintenance (Letellier, 2015). Integrated documentation is a crucial part of the condition survey and an essential step towards identifying causes triggering damage and decay (diagnosis). It relies on topographic surveying, along with other non-destructive approaches that employ proximal sensing techniques to record rich data (Solla et al, 2020). Techniques proven to be efficient for architectural documentation involve close-range photogrammetry (CRP), terrestrial laser scanning (TLS), and combinations of both (Georgopoulos, Stathopoulou, 2017). Both techniques are sources of important radiometric data exploitable to further facilitate the diagnosis. Reflectivity values recorded by TLS—which express the intensity of the backscattered laser energy—have been recently explored for mapping the alterations of historical surfaces (Del Pozo et al, 2015; Sánchez-Aparicio et al, 2018) as well as for surface moisture detection (Lerones et al, 2016)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
