Bulletin of Surveying and Mapping ›› 2023, Vol. 0 ›› Issue (8): 136-141.doi: 10.13474/j.cnki.11-2246.2023.0246

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Remote sensing of “space-sky-terrestrial” using spectral and geometry for small slope hidden danger

WANG Bin1,2,3, XU Jiayuan1,2,3, TANG Liming1,2,3, ZHOU Lipeng1,2,3   

  1. 1. Surveying and Mapping Institute Lands and Resource Department Guangdong Province, Guangzhou 510663, China;
    2. Key Laboratory of Natural Resources Monitoring in Tropical and Subtropical Area of South China, Ministry of Natural Resources, Guangzhou 510663, China;
    3. Guangdong Science and Technology Collaborative Innovation Center for Natural Resources, Guangzhou 510663, China
  • Received:2022-09-22 Published:2023-09-01

Abstract: The "space-sky-terrestrial" integrated three-check technology system was verified and applied to the large/medium-sized slope hidden danger identification early in Southwest China,but this method has a low recall rate for small disasters induced by human engineering activities.It is extremely urgent to quickly and accurately identify small hidden danger points. In response to the small、wide、frequent and hidden slope deformation,and the landslide disasters induced by artificially cutting the slope and building houses,this paper takes Guangdong Longchuan as an example,which researchs and experiments of "full inspection-belt sweep-point screening-surface core-Group defense-joint trial" early identification spectral and geometry remote sensing method,using the SBAS-InSAR time series inversion of Sentinel-1 radar images from January 8,2019 to June 29,2022 to extract abnormal deformation areas,then combining LiDAR and geological disaster background information to identify the slope hidden danger points from the abnormal deformation areas,and defines the types of hidden danger through verification in the field. The results show that 323 abnormal deformation areas are found by time series InSAR inversion,82 suspected hidden danger spots are identified by screening,55 spots are verified in the field,and 7 are defined as hidden danger points.It is proved that the method has application value,which can provide scientific basis for disaster prevention and reduction at geological hidden danger.

Key words: slope deformation, three inspection system, optical remote sensing, synthetic aperture radar, laser point cloud

CLC Number: