基于K-Medoid聚类算法的GPS坐标转换研究

A study of GPS coordinate transformation theory based on the algorithm of K-Medoid

对GPS网约束平差时,GPS控制网的精度与坐标系统转换控制点的位置选择有关。通过实验分析得出,整个网的检核点与相应的转换控制点总距离越远,坐标转换后网的精度越低。在此基础上,提出使用K-Medoid聚类算法,通过计算机程序自动寻找用于计算坐标系统转换参数的最佳控制点,并将文中方法运用于某大桥GPS控制网的控制点选取,通过工程实例验证了基于K-Medoid聚类方法的GPS坐标系统转换的可行性。

When conducting the constraint adjustment of GPS network ,the accuracy of GPS control network is related to the choice in the location of the conversion control points of the coordinate system .T hrough the experimental analysis ,the paper reaches a conclusion :the longer the total distance of the checking points and conversion control points are ,the lower precision of the network is .Based on this conclusion ,the algorithm of K‐Medoid is used to find the best conversion control points and applying this to the GPS network of a certain bridge can prove the feasibility of this method .