Method for measuring image and inspecting quantity under light detection and ranging (LiDAR) three-dimensional environment

Abstract

The invention relates to the technical field of mapping, in particular to a method for measuring image and inspecting quantity under the light detection and ranging (LiDAR) three-dimensional environment, comprising the following steps of: respectively manufacturing a digital surface model (DSM), a digital evaluation model (DEM) and a digital ortho image (DOM) according to multiple sensor data obtained by the LiDAR system, respectively layering and partitioning the DSM, the DEM and the DOM in advance, laminating the DSM, the DEM and the DOM to construct a three-dimensional environment, three-dimensionally measuring mark and intersecting, acquiring and cataloging digital line graphic (DLG) elements, and inspecting quality of the DLG. The invention breaks through the limitation that photogrammetric survey needs complex flow chart of data processing and professional photogrammetric survey equipment and software to construct stereopair by two photos, solves the problem that the LiDAR system directly generates the DLG products, shortens the period of DLG production by the LiDAR system, largely improves the practicability and the use value of the LiDAR system, and provides the base for the large-scale application of the LiDAR system in mapping, electricity, city planning, geology and design of road and railway.

Description

technical field [0001] The invention relates to the technical field of surveying and mapping, in particular to a method for surveying and quality inspection in a LiDAR three-dimensional environment. Background technique [0002] In the late 1980s, multi-sensor integrated 3D laser scanning technology (LiDAR, Light Detection AndRanging) produced a major breakthrough in the real-time acquisition of 3D geospatial information, providing a new technology for obtaining high-resolution geospatial information The method enables people to change from traditional manual single-point data acquisition to continuous automatic data acquisition, making it possible to automate and intelligentize data processing. The LiDAR system quickly generates a digital surface model (DSM, Digital Surface Model) and a digital elevation model (DEM, DigitalEvaluation Model) through high-precision POS data, point cloud data and image data, and automatically generates a digital orthophoto (DOM) on this basis....

AI Technical Summary

Problems solved by technology

However, the construction of a three-dimensional model requires complex internal orientation, relative orientation, and absolute orientation. It must have professional photogrammetry knowledge. It is completed on professional photogrammetry equipment and professional photogrammetry software. The process is complicated and not conducive to non-photogrammetry majors. The use of personnel affects the promotion of photogrammetry technology

Therefore, using the LiDAR system to produce digital line graph (DLG) products according to the traditional method of photogrammetry to build a three-dimensional model increases the cost of data processing, which cannot reflect the advantages of the LiDAR system. The high-cost surveying and mapping system is not worth the loss, which affects the promotion and use of LiDAR system

[0004] Traditional aerial survey production DEM needs to be established on the basis of stereoscopic observation and compilation of contour lines, which is time-consuming and laborious. The biggest feature of LiDAR system is that it uses 3D laser scanning to directly obtain DEM and DSM and then quickly generate DOM. Therefore, the most suitable for LiDAR system The direct products are DEM, DSM and DOM

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