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In the current digital age, it is the basis for multi-source data fusion that unifying the spatial reference of different scanning point clouds to the geographic coordinate system. A key issue in georeferencing is to obtain high - precision georeferenced point clouds with least efforts. In the case of minimum control primitives, there are not joint solutions of georeferencing parameters based on mixed control primitives. Line primitives are widely present in point clouds, so a joint solution of georeferencing parameters based on two control points and one control line is presented. According to the translation model of 3D point, the properties of antisymmetric matrix and Rodrigues matrix, the translation model of two control points and one control line is deduced. Furthermore, the rotation matrix and georeferencing parameters of single station point cloud georeferencing is calculated, and then the coarse georeferencing is achieved. Experiments show that our proposed method has high efficiency and less efforts. The root mean square error (RMSE) of plane position is 11.20 mm, and the RMSE of place position is16.66 mm. Our proposed method can be used as the way to obtain the initial value of georeferencing parameters in precise georeferencing. [ABSTRACT FROM AUTHOR]

Based on the three-dimensional coordinate transformation model and the properties of the Roderick matrix, a linear fitting equation for single target point cloud orientation was derived. A constraint equation makes it conditional that the homonymy laser beam intersects with public targets. Orientation parameters for the entire point cloud in the whole region are then resolved simultaneously at the same time. Compared to the traditional non-linear model for point cloud orientation, the algorithm proposed in this paper is capable of achieving total orientation for a multi-station point cloud in the whole region, making it unnecessary to calculate initial parameters in the computational process. The accuracy of the each station orientation computed by this method vis a vis the traditional was high. [ABSTRACT FROM AUTHOR]