Onboard LiDAR data based dike damage detecting method

Abstract

The invention provides an onboard LiDAR data based dike damage detecting method aiming at actual requirements for dike tour inspection management. Through collecting dike onboard LiDAR data and through point cloud data filtering, high precision dike DEM data is generated for ground point cloud interpolations. On this basis, the high precision DEM is utilized for generating a dike slope map and a vectorization data product thereof. Pattern spot fusion operation is utilized for removing broken map spots, so that dike top and dike shape parameters are extracted. Through combination with dike linedata, an equidistant dike section is constructed. Through intersection of a dike section line and the dike top and the dike slope of the dike, an intersection point set is calculated. Dike damage detection on the section line can be realized through counting the number of the intersection point sets of the section line. The high precision DEM data generated by the onboard LiDAR can express groundshape change in a delicate manner. The method can detect dike damage efficiently and can be used for dike tour inspection management of a hydraulic engineering department, so that dike damage detection efficiency is improved substantially and good application value is achieved.

Description

technical field [0001] The invention relates to the technical field of water conservancy information, in particular to an embankment damage detection method based on airborne LiDAR data. Background technique [0002] Dikes are an important measure for flood control. At present, the length of dikes built in my country has reached more than 200,000 kilometers, and they have played an important role in flood control and disaster relief. A dike usually consists of two parts, the crest and the slope, where the crest refers to the flat surface at the top of the embankment, whose transverse width is narrower than the base of the embankment, and the slope refers to the two sides of the embankment, whose outer edges are level with the ground, The embankment slope and embankment crest form the embankment body. Some modern embankments also have a platform on the slope of the embankment. The platform is a section of flat ground on the slope of the embankment, and its width is usually n...

AI Technical Summary

Problems solved by technology

[0011] Aiming at the disadvantages of conventional embankment detection requiring manual on-site detection, heavy workload, and low efficiency, the present invention provides an embankment damage detection method based on airborne LiDAR data, which can be efficiently realized through the sensitivity of embankment damage on high-precision DEM Large-scale, high-precision dike crest and slope damage detection can well solve the above-mentioned technical problems encountered in the current dike damage detection, and meet the needs of high-efficiency, high-precision and large-scale dike damage detection

Images