【摘要】 利用4种激光扫描设备对地下空间扫描,针对获得的点云数据,用全站仪测量研究区内特征点三维坐标,统一点云空间参考;并从点云数据中获取特征点坐标,与测量的三维坐标对比分析。结果显示:推扫式激光扫描设备比架站式精度略低,最弱方向中误差为0.128 m,而架站式为0.039 m;用推扫式激光扫描设备对地下空间进行测量,能满足1∶500数字线划图的测量精度要求。更多还原

【Abstract】 The point cloud data of underground space were acquired with four kinds of laser scanning devices,and three-dimensional coordinates of the feature points in the area were measured with the total station.All data used unified spatial reference.The threedimensional coordinates of feature points were obtained from the point cloud data separately.The analysis of two measurements showed that the accuracy of position using mobile scanning device was slightly lower than using static one,the mean square error was 0.128 m in the weakest direction,on the contrast the static was 0.039 m.The measurement precision of 1 ∶ 500 DLG can be obtained by the mobile laser scanning device in the underground space.更多还原