3d Integrated Surveys and Stratigraphic Methods for a Deeper Understanding of Historical Buildings. A Case-Study of the Franciscan Monastery and the Immacolata Church in Troina, Sicily

Abstract

<p><strong>Abstract.</strong> The study presents the results of the application of a multidisciplinary methodology for a deeper understanding of historical buildings. 3D integrated surveys and stratigraphic methods can together make it possible to date the principle construction and evolution phases of historical buildings for which a thorough historical documentation does not exist for our time.</p><p>The case-study presented involves the Franciscan monastery and adjacent Immacolata church in Troina, which is a small medieval town located in the north-eastern part of Sicily.</p><p>The small number of historical records has only allowed for the dating of the monastery's foundation and of a few of transformation phases. Contrarily to this, various markings on the surfaces of the walls indicate rather the presence of numerous construction phases.</p><p>The inaccessibility of parts of the internal spaces, as well as the existence of a sharp incline of the road and of very high walls along scant sections of the road, are the reasons for having chosen to carry out a 3D laser-scanning survey campaign. It made it possible to document the overall area and the relationship between the different parts of the complex. The integration between 3D laser scanning and photo-modelling methods made it possible to highlight the details, anomalies, traces and signs of the stratifications over time. The results of this integrated survey were explained in a series of graphic elaborations in support to the following stratigraphic investigation, to put in order the numerous traces discovered.</p></p>

Digital Photogrammetry, TLS Survey and 3d Modelling for Vr and Ar Applications in Ch

“…The diffusion of portable devices like smartphones and tablets has opened new possibilities of uses, allowing virtual-navigation as in the case of Virtual Reality (VR), or even offering additional information to the fruition of the real environment as in the case of Augmented Reality (AR). At the same time, the topic of Cultural Heritage (CH) valorization achieved even more importance in the last decades, highlighting the key role of these new technologies, in the fields of conservation and fruition of cultural goods (Ioannides andDavies, 2018, Ferracani et al, 2017;Mah et al, 2019;Campisi et al, 2019). The development of these new strategies, related to VR and AR fruition, increased the necessity of new requirements in the fields of the survey and 3D modelling of CH.…”

“…For this reason, it's necessary to choose the best procedures of simplifications in order to obtain a lighter 3D model and, at the same time, to maintain the necessary Level of Detail (LoD). Considering the acquisition of the base information, survey operations, recent advances in technologies allow obtaining 3D point cloud restitutions of cultural sites with satisfactory levels of accuracy, useful for conservation and valorization aims (Campisi et al, 2019;Mineo et al, 2018;Guarnieri et al, 2017). Terrestrial Laser Scanner (TLS) technologies grant the acquisition and the merging of different point clouds of thousands of points.…”