摘要： 通过Riegl LMS_420i激光三维扫描仪获取某大型钢结构管桁架的真实三维坐标信息，后处理采用GeoMagic软件拟合求解管桁架的空间向量，实现了钢结构桁架节点的快速、高精度测量。

Abstract: Use Riegl LMS_420i three-dimensional laser scanner to obtain the three-dimensional coordinate information of the steel tube truss. Followed the post-processing by GeoMagic software, fitting to solve the space vectors of the pipe truss. In this way, a fast and high-precision measurement of the steel truss was achieved.