Monitoring Cultural Heritage Sites Affected by Geo-Hazards Using In Situ and SAR Data: The Choirokoitia Case Study

Themistocleous, Kyriacos; Danezis, Chris

doi:10.1007/978-3-030-10979-0_16

Cited by 5 publications

(2 citation statements)

References 51 publications

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“…Recent developments in photogrammetry technology provide a simple and cost-effective method of generating relatively accurate 3D models from 2D images [8][9][10]. Photogrammetry is a precise 3D measurement technique based on the triangulation of several high-quality images that allow for the collection of semantic and spatial data of a building or object.…”

Section: Photogrammetrymentioning

confidence: 99%

The documentation of ecclesiastical cultural heritage sites in Cyprus

Themistocleous

Evagorou

Mettas

et al. 2020

Earth Resources and Environmental Remote Sensing/Gis Applications XI

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Innovative digital applications are invaluable for the documentation and conservation of cultural heritage monuments. Digital techniques can provide data on cultural heritage sites to enhance understanding of their changes over time. Due to the age and conditions of cultural heritage monuments in Cyprus, especially churches, there is a great demand to develop a methodology that is capable of digitizing both the internal and external church using a variety of non-invasive techniques as a means of storing and managing documentation data and metadata for providing comprehensive culturally digital and documentation evidence. In this paper, the integration of various technologies was used to document the 12 th century St. Efstathios Chapel in Kolossi, Cyprus. The methodologies included data acquired by close-range images from Unmanned Aerial Vehicles (UAVs) and hand-held cameras, coordinates from ground control points using Total Stations etc., to document both the internal and external facades and relics of selected religious monuments. Thousands of images from the monument were taken using a UAV with a high-resolution camera. The images were processed using photogrammetry to provide a digital model of the church. The use of the HSV color model was used to examine potential anomalies in the structure. The combination of the technologies will provide a 3D model to document and identify ecclesiastical cultural heritage sites, which can be incorporated into a dynamic database and valuable resource to better understand the cultural heritage monument. In this way, the end-users will be able to access the information from the digital platform at any time.

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Section: Photogrammetrymentioning

confidence: 99%

The documentation of ecclesiastical cultural heritage sites in Cyprus

Themistocleous

Evagorou

Mettas

et al. 2020

Earth Resources and Environmental Remote Sensing/Gis Applications XI

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“…The diagnosis must follow specific methodologies in order to understand the structure and building methods, to characterize the alteration processes, and to evaluate and control the structural safety of the site (Chang et al 2003;ICOMOS 2003;Heinemann 2008;Laborde Marqueze 2013;Damas Mollá et al 2018. For cultural heritage and archeological sites considered to be affected by geologically based issues and geohazards, monitoring strategies incorporate a wide range of complementary survey techniques (Margottini et al 2015;Themistocleous and Danezis, 2019), including, at the localscale (Themistocleous et al 2018), in situ observation, 3D laser scanning, differential GNSS, satellite and groundbased radar interferometry, UAV imagery (Colomina and Molina 2014;Tang et al 2016), along with geotechnical instrumentation for displacement control, mainly extensometers and crack gauges (Ding et al 2000;Greif et al 2006;Mulas et al 2020), and environmental sensors.…”

Section: Introductionmentioning

confidence: 99%

Assessment of long-term structural movements in a historic cliffside construction through Lomb-Scargle spectral analysis of unevenly spaced time records: the Punta Begoña Galleries (Getxo, Spain)

Uriarte

Morales-Juberías

Clemente

et al. 2022

Bull Eng Geol Environ

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Long-term monitoring of structural movements in historic buildings and heritage sites allows assessing their stability and recognizing damages that require intervention. The Punta Begoña Galleries, built in the earlier part of the twentieth century, present pioneering techniques in the use of reinforced concrete in building construction. They stand directly over a coastal cliff, and their recovery requires first to guarantee their stability, while maintaining their historic and patrimonial values. Thus, with the goal of analyzing their global stability, as well as the extent of the observed damages, we implemented a motion monitoring network that includes three boreholes for extensometric control, an inclinometer, and five crack gauges (crackmeters). This monitoring was complemented with the recording of hydrometeorological variables at the surface and in four piezometers. The spectral analysis of the signals of movements was performed by introducing the use of the Lomb-Scargle (LS) periodogram, which is particularly well-suited for the analysis of unevenly spaced time series. This analysis allowed us to differentiate the reversible seasonal elastic components of the records and to recognize the irreversible long-term plastic displacements, which highlight the sectors with active instability. In our case, the identified damages are related to two local problems of building support. Even though the irreversible component of the displacement after seasonal sinusoidal detrending is small (with maximums up to 0.12 mm/year), it does imply a dynamic plastic deformation, which calls for the need to adopt structural stabilization measures.

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