High-precision three-dimensional urban scene construction method integrating airborne LIDAR (Laser Intensity Direction And Ranging) technology and vehicle-mounted mobile laser scanning technology

Abstract

The invention discloses a high-precision urban three-dimensional modeling method integrating an airborne LIDAR (Laser Intensity Direction And Ranging) technology and a vehicle-mounted mobile laser scanning measurement technology, comprising the following steps of: firstly, acquiring high-precision three-dimensional laser point clouds and high-resolution digital aerial photos of a measuring region by adopting airborne LIDAR, fast extracting a high-precision digital elevation model and a digital orthoimage product, carrying out high-precision modeling on a building to make the scenes of an urban three-dimensional electronic sand table and an urban three-dimensional building body frame model; secondly, completing the acquisition of the high-density laser point clouds and high-precision digital photos of urban scenes positioned at both sides of a road of the measuring region by adopting vehicle-mounted mobile laser scanning measurement, carrying out the quality optimization of vehicle-mounted data by referring to airborne LIDAR results, and then fast carrying out three-dimensional modeling on various urban piece elements; and finally integrating three-dimensional digital model results acquired through the airborne LIDAR and the vehicle-mounted mobile laser scanning measurement, therefore the quality and the work efficiency of the urban three-dimensional modeling are greatly enhanced. The invention can greatly reduces the development cost of projects.

Description

1. Technical field [0001] The invention relates to a three-dimensional urban modeling technology in the field of three-dimensional digital city construction, in particular to a high-precision urban three-dimensional modeling method integrating airborne LIDAR and vehicle-mounted mobile laser scanning measurement technology. 2. Technical background [0002] Traditional urban 3D modeling mainly uses traditional surveying and mapping methods such as topographic maps, traditional aerial photogrammetry, satellite remote sensing images, engineering surveys, and ground laser scanning to carry out urban 3D modeling. However, the above-mentioned technologies all have their obvious disadvantages and deficiencies: [0003] (1) Modeling using topographic maps requires a large-scale digital line drawing with strong current situation in the urban area, and the building heights are obtained through visual estimation or manual measurement for modeling. This method has problems such as lack ...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the various problems existing in the existing traditional surveying and mapping technology in the construction of 3D digital cities and improve work efficiency, the purpose of this invention is to provide a high-precision 3D city scene construction method integrating airborne LIDAR and vehicle-mounted mobile laser scanning measurement technology