Research on Resistance Coordinate Transformation Method of High Accuracy Based on IGGIII Model

 A high precision spatial coordinate transformation method based on the robust robustness estimation theory is proposed to avoid the influence of the coordinates of the common point coordinates or the error is too large to solve the coordinate transformation parameters. The method uses IGGIII model redefines the common point with low accuracy or large error, and gradually reduces its role in solving the coordinate transformation parameters, and obtains the reliable coordinate transformation parameters. Finally, the algorithm is used to calculate the common point coordinate data in a project instance. The comparison between the two schemes shows that the proposed method is practical and effective, and can achieve the goal of high precision coordinate transformation. In the actual measurement production has a certain value to promote.