Absolute Positioning Method of 3D Laser Scanner

To locate the point cloud results of 3D laser scanning from local coordinate system to geodetic coordinate system, the spherical centers of four pairs of spherical targets were used as virtual homonymous points. With the combination of manual and automation methods, CloudCompare software was used for secondary development and programming, which realized the fitting calculation of the spherical center coordinates and radius of the target ball, as well as point cloud registration and point cloud positioning. This method further improves the accuracy of point cloud registration and absolute positioning, and has certain application value.