ISPRS-Archives ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ISPRS-Archives Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. 2194-9034 Copernicus Publications Göttingen, Germany 10.5194/isprs-archives-XLII-5-W1-475-2017 GEOMATIC METHODOLOGIES FOR THE STUDY OF <i>TEATRO MASSIMO</i> IN PALERMO (ITALY) Dardanelli G. 1 Allegra M. 2 Giammarresi V. 3 Lo Brutto M. 1 https://orcid.org/0000-0003-3765-9741 Pipitone C. 1 Baiocchi V. 3 https://orcid.org/0000-0003-4491-7868 Department of Civil, Environmental, Aerospace, Materials Engineering (DICAM), University of Palermo, Italy C.G.T. srl, Via Corradino di Svevia 48, 90134 Palermo, Italy Department of Civil, Constructional and Environmental Engineering (DICEA), “Sapienza” University of Rome, Italy 16 05 2017 XLII-5/W1 475 480 This work is licensed under a Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ This article is available from https://isprs-archives.copernicus.org/articles/isprs-archives-XLII-5-W1-475-2017.html The full text article is available as a PDF file from https://isprs-archives.copernicus.org/articles/isprs-archives-XLII-5-W1-475-2017.pdf

This work illustrates the use of geomatics techniques for the documentation of <i>Teatro Massimo</i> in Palermo (Italy), one of the most important and big in Italy and in Europe. The theatre is characterized by a very complex structure and is realized also using innovative solution, studied at the time of the project specifically for this building; for example, an original system was realized for a natural air-conditioning system of the auditorium. <br><br> Due to his complexity, the documentation of the <i>Teatro Massimo</i> requires studying specific survey solutions for the different parts of the building. In this paper, some studies on two of the most representative parts of the building were described. In particular, a 3D survey of the auditorium was carried out to obtain a first 3D model of the most important internal part; a very accurate monitoring of structure inside the dome of the theatre was also carried out. <br><br> The survey of the auditorium was realized by a Terrestrial Laser Scanning (TLS), that has allowed the creation of a digital archive of point clouds, showing, however, the some level of criticality due to the complex shapes of building and of architectural details. The work has highlighted that specific strategy to optimize the number of acquisitions needed for the complete documentation of the auditorium. <br><br> The monitoring of the structure inside the dome was carried out by topographic and photogrammetric techniques. The monitoring was aimed at measuring the displacements of the support devices connecting the iron structure of the dome. The monitoring has allowed to understand and to test the proper functionality of this complex system. Some tests were carried out also by a thermal camera to correlate the displacements of the support devices with the dilatations produced by steel thermal gradients.