[1]CAI Xiaochao,TANG Hongtao.Precise Extraction of Quantitative Parameters of the Geological Structure in Pishan County,Xinjiang Using Oblique Photogrammetry[J].Journal of Seismological Research,2022,45(03):468-478.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0047
]
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Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
45
Number of periods:
2022 03
Page number:
468-478
Column:
生命线工程系统抗震防灾专栏
Public date:
2022-06-20
- Title:
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Precise Extraction of Quantitative Parameters of the Geological Structure in Pishan County,Xinjiang Using Oblique Photogrammetry
- Author(s):
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CAI Xiaochao1; TANG Hongtao2
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(1.Henan Vocational College of Water Conservancy and Environment,Zhengzhou 450002,Henan,China)(2.The Second Monitoring and Application Center,China Earthquake Administration,Xi'an 710054,Shaanxi,China)
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- Keywords:
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oblique photogrammetry; active structures; geomorphic interpretation; accuracy evaluation; quantitative parameters
- CLC:
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P642.22
- DOI:
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10.20015/j.cnki.ISSN1000-0666.2022.0047
- Abstract:
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In this paper,the oblique photogrammetry technology is introduced into the quantitative research of geological active structures.Firstly,the basic principle of the data acquisition and processing of tilt photogrammetry is introduced,and the data acquisition and processing of the low-altitude,tilt photogrammetry are carried out in the study area of 20.08 km2 in Pishan County,an earthquake-prone area in Xinjiang.The 3.39 cm high-resolution data of DOM,DSM,the 3D real scene modeling of 9 cm resolution,and DSM data such as contours,slopes are obtained.Secondly,according to 152 surface image control points,the accuracy of DOM and DSM data is evaluated,and the mean square error of the point plane is 1.7 cm,and the mean square error of elevation is 5.3 cm.Finally,with the help of the above-mentioned high-resolution digital model,the geomorphological interpretation of fault scarps in the study area was realized,and the vertical displacement of 7 terraces scarps was accurately extracted:F1-2(3.71±0.62)m,F2-3(3.54±0.04)m,F3-4(6.06±0.22)m,F4-5(7.43±0.56)m,F5-6(5.52±0.18)m,F6-7(13.05±0.33)m.Through oblique photogrammetry,the 3D real model,which is difficult to obtain by traditional aerial and satellite images,is directly obtained,and can be browsed and measured from any angle of view.The vertical displacement of terrace with real geographic coordinates is extracted too.The tilt photogrammetry technique has a broad application prospect in the quantitative study of geological active structures.