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        1. News

          3D laser scanner participates in the diagnosis and analysis of geological disast

          2019-07-03

          “Using the latest remote sensing technology to achieve full coverage and closely monitor the geological disasters every move”. Recently, internationally renowned journals published the research results of China University of Geosciences, "Integrating multiple remote sensing technologies to comprehensively monitor the structure and latest development of landslides", which has attracted wide attention in the world.

          According to reports, China is a country where geological disasters occur very frequently and disaster losses are extremely serious. Landslides, collapses and mudslides are almost all over the mountainous and hilly areas of the provinces, and their active area accounts for about 45% of the country's land area. The key to geological disaster management and forecasting is to carry out long-term monitoring work, and continuous and reliable surface deformation monitoring is an important content and effective means of geological disaster monitoring and early warning. The new high-precision remote sensing technology is an effective means to improve the accuracy and comprehensiveness of geological disaster monitoring.

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          The research team used the geographic information platform to integrate the latest remote sensing technology, including ground 3D laser scanners, GPS, aerial imagery and satellite imagery, to achieve comprehensive coverage and comprehensive diagnosis of the typical landslide-Huangtu slope landslide in the Three Gorges reservoir area. The 3D laser scanner obtains the spatial position, reflection intensity and color of the surface of the object contacted by the laser point through the laser signal actively emitted and received. The high-speed and high-density point cloud data can completely reflect the measured object. Surface morphology. The high-density panoramic scanning of the ground 3D laser scanner can be used to understand the detailed deformation and overall changes of the landslide body, and has broad application prospects in landslide hazard monitoring and forecasting. By installing a GPS detection pier at a specific location, continuous displacement of these locations can be obtained to analyze the overall deformation of the landslide. The technology can achieve extremely precise subtle deformations, which can improve the accuracy of deformation monitoring. The aerial imagery and satellite imagery can analyze the overall situation of the landslide at different scales and ranges, and produce a landslide catalogue. Geographic information technology can effectively integrate data sources from different sensors to achieve spatial analysis and application

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