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High-precision three-dimensional city modeling method

A high-definition technology for urban 3D modeling, applied in the field of high-definition urban 3D modeling, to achieve the effects of high modeling, improved modeling efficiency, and high accuracy of building frame model planes and elevations

Inactive Publication Date: 2017-05-17
星际空间(天津)科技发展有限公司
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AI Technical Summary

Problems solved by technology

[0012] 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

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Embodiment Construction

[0040] Integrating airborne LIDAR and vehicle-mounted mobile laser scanning measurement technology to construct a 3D digital city virtual scene is quite different from traditional technical methods, mainly reflected in:

[0041] A high-definition urban three-dimensional modeling method, wherein: the method comprises the steps of:

[0042] Use airborne LIDAR to complete the acquisition of urban aerial survey results;

[0043] Make high-precision digital elevation models and digital orthophoto products based on airborne LIDAR, and integrate the respective advantages of point cloud and aerial photo data in airborne LIDAR to carry out high-precision modeling of buildings, and make urban 3D electronic sand tables and 3D buildings object box model scene;

[0044] Using vehicle-mounted mobile laser scanning measurement to complete the acquisition of high-density laser point clouds and high-resolution digital photos of urban scenes on both sides of the urban road, referring to the re...

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Abstract

The invention discloses a high-precision three-dimensional city modeling method, and relates to the field of modeling. The method is characterized in that firstly high-precision three-dimensional laser point cloud and high-resolution digital aerial photos of a measurement area are acquired by using airborne LIDAR, and high-precision digital elevation models and digital orthoimages are rapidly extracted and high-precision modeling of buildings is performed so that a three-dimensional city electronic sand table and three-dimensional building object frame model scenes are manufactured; secondly, acquisition of the highly dense laser point cloud and the high-resolution digital photos of the city scenes on the both sides of the measurement area is completed by using vehicle-mounted mobile laser scanning measurement, vehicle-mounted data quality optimization is performed by reference to the airborne LIDAR result and then three-dimensional modeling is rapidly performed on various types of sketch elements of the city; and finally the three-dimensional digital model results acquired by airborne LIDAR and vehicle-mounted mobile laser scanning measurement are integrated so that the quality and the working efficiency of three-dimensional city modeling can be greatly enhanced, and the project development cost can be greatly reduced.

Description

[0001] 1. Technical field [0002] The invention relates to the technical field of three-dimensional modeling, in particular to a high-precision three-dimensional modeling method for cities. [0003] 2. Technical background [0004] 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: [0005] (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 of elevation information of ground objects, poor elevation accuracy of building models, and poor roof fineness; [0006] (2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/521G06K9/62
CPCG06T2200/08G06T2207/10028G06F18/23G06F18/24
Inventor 王永杰王海程良勇
Owner 星际空间(天津)科技发展有限公司
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