Bulletin of Surveying and Mapping ›› 2022, Vol. 0 ›› Issue (9): 80-85.doi: 10.13474/j.cnki.11-2246.2022.0268

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3D modeling of city-level complex buildings based on cross-around route

WANG Kaiqi1,2,3, FANG Jun1,2,3,4, WANG Zhenlin3, GUO Haibin1,2,3, YANG Zhensheng1,2,3   

  1. 1. Hunan Provincial Key Laboratory of Geo-Information Engineering in Surveying, Mapping and Remote Sensing, Hunan University of Science and Technology, Xiangtan 411201, China;
    2. National-Local Joint Engineering Laboratory of Geo-spatial Information Technology, Hunan University of Science and Technology, Xiangtan 411201, China;
    3. School of Earth Sciences and Spatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;
    4. Key Laboratory of Highway Engineering of Ministry of Education, Changsha University of Science and Technology, Changsha 410114, China
  • Received:2022-02-14 Published:2022-09-30

Abstract: At present, provinces and cities are accelerating the construction of national 3D real scene. Among them, the city-level real 3D modeling has higher accuracy requirements, richer display content and greater workload than the terrain-level. In view of the high and low dislocation and complex structure of the building scene, the improvement effect is not obvious by improving the overlap of UAV routes. There are still many flower deformation areas, which will increase the number of images, time-consuming flight and modeling process, and increase the production cost. Therefore, a 3D modeling method of urban real scene based on UAV cross-around route is proposed. The typical experimental sample area is selected for aerial photography modeling experiment, and the modeling efficiency, quality and accuracy are compared and analyzed with the conventional five-way route aerial photography method. The results show that the cross-around route aerial photography method can greatly reduce the number of images, save the time of aerial triangulation calculation and modeling, and improve the overall modeling efficiency. Moreover, the modeling quality is better and the overall accuracy is higher in the difficult areas such as the roof canopy of the building and the glass window, which meets the requirements of relevant standards and specifications.

Key words: UAV, cross-around route, complex buildings, three-dimensional modeling of real scene, accuracy evaluation

CLC Number: