倾斜摄影在城市道路竣工测量中的应用分析

Analysis of the Application of Tilt Photography in Urban Road Completion Survey

采用无人机倾斜摄影测量法对城市道路进行竣工测量。从空三精度、模型精度及设计-实测数据符合性比对方法等方面进行分析,结果显示检测点点位中误差、高程中误差及检测边边长中误差分别为±3.8 cm、±2.7 cm、±3.6 cm,数据成果满足城市道路竣工测量要求,相较传统测量方法具有高效性、直观性和易于对比施工设计图等优点。为解决模型缺陷问题,尝试倾斜摄影点云+三维激光点云融合建模,结果表明点云融合所建模型在道路及其附属设施结构表达上优于倾斜摄影模型,为后续道路竣工测量提供了新的思路。

UAV oblique photogrammetry has been applied for urban road completion survey. From the analysis of aerial triangulation accuracy, model accuracy and the conformance comparison method of design-measured data, the results show that the root mean square errors of point location, elevation and side length are ±3.8 cm, ±2.7 cm, ±3.6 cm, respectively. The data results could meet the requirements of urban road completion survey. Compared with the traditional measurement method, it is efficient, intuitive and easy to compare construction design drawings by oblique photogrammetry. To solve the problem of model defects, the modeling based on fusion of point clouds which are from 3D laser scanner and oblique photography respectively has been tried and the results show that the model built by point clouds fusion is superior to oblique photography model in the structural expression of roads and ancillary facilities, which provides a new idea for subsequent road completion survey.