【摘要】 不同大地坐标系间的坐标转换是采用两套坐标系下坐标的公共点,结合相应的转换模型,求取转换九参数来实现转换的过程。转换时若公共点坐标存在粗差,九参数的求解精度便会受到影响,致使转换失败。文章将传统的Baarda粗差数据探测法、抗差最小二乘法以及拟准检定法用于解决其转换时公共点坐标粗差导致的精度偏离问题。结合转换算例得出精度对比结论,为工程实际中的大地坐标转换算法的选择提供一定的参考依据。更多还原

【Abstract】 The coordinate transformation between different geodetic coordinate systems applies the common point of coordinates in two sets of coordinate systems. Integrated with corresponding transformation model, the process of transforming nine parameters is produced. If there is a gross error in the common point coordinate during conversion, the accuracy of the nine parameters will be affected, resulting to failure of conversion. The traditional Baarda gross error data detection method, robust least squares method and quasi-accurate detection method are used to solve the problem of precision deviation caused by gross error of common point coordinate during conversion. In combination with conversion algorithm examples, it provides certain reference for the selection of geodetic coordinate conversion algorithm in engineering practice.更多还原