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Remote Sens. 2016, 8(5), 432; doi:10.3390/rs8050432

Monitoring Cultural Heritage Sites with Advanced Multi-Temporal InSAR Technique: The Case Study of the Summer Palace

1
Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, No. 9 Dengzhuang South Road, Haidian District, Beijing 100094, China
2
International Centre on Space Technologies for Natural and Cultural Heritage under the Auspices of UNESCO, No. 9 Dengzhuang South Road, Haidian District, Beijing 100094, China
3
Beijing Institute of Surveying and Mapping, No.15 Yangfangdian Road, Haidian District, Beijing 100038, China
*
Author to whom correspondence should be addressed.
Academic Editors: Rosa Lasaponara, Zhong Lu and Prasad S. Thenkabail
Received: 12 March 2016 / Revised: 11 May 2016 / Accepted: 17 May 2016 / Published: 21 May 2016
(This article belongs to the Special Issue Remote Sensing for Cultural Heritage)
View Full-Text   |   Download PDF [11945 KB, uploaded 21 May 2016]   |  

Abstract

Cultural heritage sites are rare and irreplaceable wealth of human civilization. The majority of them are becoming unstable due to a combination of human and natural disturbances. High-precision, efficient deformation monitoring facilitates the early recognition of potential risks and enables preventive diagnosis of heritage sites. In this study, an advanced Multi-Temporal Interferometric Synthetic Aperture Radar (MTInSAR) approach was developed by jointly analyzing Persistent Scatterers (PSs) and Distributed Scatterers (DSs) using high-resolution SAR images. Taking the World Heritage Site of Summer Palace in Beijing as the experimental site, deformation resulting from PSs/DSs showed that overall the site was generally stable except for specific areas and/or monuments. Urbanization (construction and demolition) triggered new subsidence in the vicinity of East and South Gate of the site. Slight to moderate (mm/cm-level) instabilities of ruins and monuments on Longevity Hill were detected, perhaps due to a combination of destructive anthropogenic activities and long-term natural decay. Subsidence was also detected along the Kunming Lakeside and was probably attributable to variation of the groundwater level, excessive visitor numbers as well as lack of maintenance. This study presents the potential of the MTInSAR approach for the monitoring and conservation of cultural heritage sites. View Full-Text
Keywords: cultural heritage sites; instabilities; MTInSAR; Distributed Scatterers; the Summer Palace cultural heritage sites; instabilities; MTInSAR; Distributed Scatterers; the Summer Palace
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Tang, P.; Chen, F.; Zhu, X.; Zhou, W. Monitoring Cultural Heritage Sites with Advanced Multi-Temporal InSAR Technique: The Case Study of the Summer Palace. Remote Sens. 2016, 8, 432.

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