Characterisation of Terrain Variations of an Underwater Ancient Town in Qiandao Lake
The underwater ancient town of Chunan is of great importance in archaeology and tourism. Hence, the efficient mapping and monitoring of the topographical changes in this town are essential. An attractive choice for the efficient mapping of underwater archaeology is the multibeam echo sounder system...
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MDPI AG
2020-01-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/12/2/268 |
| _version_ | 1819278274665119744 |
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| author | Fanlin Yang Fangzheng Xu Kai Zhang Xianhai Bu Hao Hu Michael Anokye |
| author_facet | Fanlin Yang Fangzheng Xu Kai Zhang Xianhai Bu Hao Hu Michael Anokye |
| author_sort | Fanlin Yang |
| collection | DOAJ |
| description | The underwater ancient town of Chunan is of great importance in archaeology and tourism. Hence, the efficient mapping and monitoring of the topographical changes in this town are essential. An attractive choice for the efficient mapping of underwater archaeology is the multibeam echo sounder system (MBES). The MBES has several advantages including noncontact survey, high precision, and low cost. In this study, the topographical changes of the ancient town under Qiandao Lake were quantitatively assessed on the basis of time-series MBES data collected in 2002 and 2015. First, the iterative closest point (ICP) algorithm was applied to eliminate the coordinate deviations between two point sets. Second, the robust estimation method was used to analyse the characterisations of the terrain variations of the town on the basis of the differences between the two matched point sets. Obvious topographical changes ranging from −0.89 m to 0.88 m were observed in a number of local areas in the town. On the global scale, the mean absolute value of the depth change in the town was merely 0.12 m, which indicated a weak global deformation pattern. The experiment proved the effectiveness of applying MBES data to analyse the deformation of the ancient town. The results are beneficial to the study of underwater ancient towns and the development of protection strategies. |
| first_indexed | 2024-12-24T00:09:24Z |
| format | Article |
| id | doaj.art-9cde402123b3448fb75d5ef82f983e05 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-12-24T00:09:24Z |
| publishDate | 2020-01-01 |
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| series | Remote Sensing |
| spelling | doaj.art-9cde402123b3448fb75d5ef82f983e052022-12-21T17:24:56ZengMDPI AGRemote Sensing2072-42922020-01-0112226810.3390/rs12020268rs12020268Characterisation of Terrain Variations of an Underwater Ancient Town in Qiandao LakeFanlin Yang0Fangzheng Xu1Kai Zhang2Xianhai Bu3Hao Hu4Michael Anokye5College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Geomatics, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Geomatics, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Geomatics, Shandong University of Science and Technology, Qingdao 266590, ChinaBureau of Hydrology, Changjiang Water Resources Commission, Shanghai 201200, ChinaCollege of Geomatics, Shandong University of Science and Technology, Qingdao 266590, ChinaThe underwater ancient town of Chunan is of great importance in archaeology and tourism. Hence, the efficient mapping and monitoring of the topographical changes in this town are essential. An attractive choice for the efficient mapping of underwater archaeology is the multibeam echo sounder system (MBES). The MBES has several advantages including noncontact survey, high precision, and low cost. In this study, the topographical changes of the ancient town under Qiandao Lake were quantitatively assessed on the basis of time-series MBES data collected in 2002 and 2015. First, the iterative closest point (ICP) algorithm was applied to eliminate the coordinate deviations between two point sets. Second, the robust estimation method was used to analyse the characterisations of the terrain variations of the town on the basis of the differences between the two matched point sets. Obvious topographical changes ranging from −0.89 m to 0.88 m were observed in a number of local areas in the town. On the global scale, the mean absolute value of the depth change in the town was merely 0.12 m, which indicated a weak global deformation pattern. The experiment proved the effectiveness of applying MBES data to analyse the deformation of the ancient town. The results are beneficial to the study of underwater ancient towns and the development of protection strategies.https://www.mdpi.com/2072-4292/12/2/268underwater archaeologyunderwater ancient townacoustic remote sensing techniquedata registrationrobust estimation |
| spellingShingle | Fanlin Yang Fangzheng Xu Kai Zhang Xianhai Bu Hao Hu Michael Anokye Characterisation of Terrain Variations of an Underwater Ancient Town in Qiandao Lake Remote Sensing underwater archaeology underwater ancient town acoustic remote sensing technique data registration robust estimation |
| title | Characterisation of Terrain Variations of an Underwater Ancient Town in Qiandao Lake |
| title_full | Characterisation of Terrain Variations of an Underwater Ancient Town in Qiandao Lake |
| title_fullStr | Characterisation of Terrain Variations of an Underwater Ancient Town in Qiandao Lake |
| title_full_unstemmed | Characterisation of Terrain Variations of an Underwater Ancient Town in Qiandao Lake |
| title_short | Characterisation of Terrain Variations of an Underwater Ancient Town in Qiandao Lake |
| title_sort | characterisation of terrain variations of an underwater ancient town in qiandao lake |
| topic | underwater archaeology underwater ancient town acoustic remote sensing technique data registration robust estimation |
| url | https://www.mdpi.com/2072-4292/12/2/268 |
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