Method and system of landslide recognition of complicated geological background area based on LiDAR

Abstract

The invention discloses a method and a system of landslide recognition of a complicated geological background area based on LiDAR (light detection and ranging). The method comprises the following steps: S1, LiDAR data is processed to generate dynamic effect model (DEM) data of a bare earth surface with elimination of vegetation influence; S2, a geomorphic characteristic parameter and a computed texture characteristic parameter are extracted to generate a characteristic parameter file; S3, an optimal characteristic parameter combination is confirmed; S4, a balance coefficient meeting a presetting accuracy condition is obtained; S5, an average user precision, an average producer precision and an overall precision are calculated; and S6, if the precision requirements are met, an edge detector is used for calculating a landslide boundary so as to realize landslide recognition. According to the invention, little data is required, and the utilization potentiality of LiDAR-DEM data in the analysis of the landslide terrain is fully developed. The classification precision of the model is high, so that the automatic recognition of the landslide boundary of the complicated geological background area is realized.

Description

technical field [0001] The invention relates to the technical field of geological environment remote sensing, in particular to a method and system for identifying landslides in complex geological background areas based on LiDAR. Background technique [0002] Landslides are geological disasters that cause huge economic losses in the world today besides earthquakes. In recent years, under the background of increasing global extreme climates, landslide disasters have occurred frequently, seriously threatening the safety of people's lives and property. Landslide prediction and early warning is one of the important tasks of landslide disaster prevention and control, and the accurate identification of landslides is one of the key technical issues of landslide prediction and early warning. Therefore, carrying out landslide identification research can provide technical support for landslide prediction and early warning and disaster prevention projects, which has great theoretical s...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to propose a method that requires less data and fully mines LiDAR DEM data in view of the difficulties faced by landslide identification in complex geological background areas in the prior art and the problems existing in traditional landslide identification methods based on DEM data. , strong practicability, a method and system for landslide identification in complex geological background areas based on LiDAR data that can realize automatic identification of landslide boundaries in complex geological background areas

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