高速铁路坐标转换方法探讨

Approach to Coordinate Conversion on High Speed Railway

为满足铁路工程测量中的不同要求,高速铁路勘测设计经常需要进行同椭球间的换带计算和不同椭球间的坐标转换。文章对高速铁路工程独立坐标的建立及多种坐标转换方法进行了探讨,分析了多种坐标转换方法的转换精度和效果,得出的结论为:不同的转换方法有不同的适用范围。条件容许时,宜采用多种转换方法并利用多余检核点进行对比分析,以便选取出最佳转换方案。

To satisfy the diversified surveyes in railway engineering, convertible calculation among the same ellipsoid and coordinate conversion among the different ellipsoid are always required in the survey and design of high speed railway. This paper probes into the approaches for establishment of independent coordinate and conversion of various coordinates in high speed railway engineering. It also analyzes the conversion precision and effect of the aforesaid approaches and comes to a conclusion that the different conversion methods have their different application scopes. When conditions permit, multiple methods should be adopted and surplus check points should be used for comparison and analysis for the purpose of picking out the optimum scheme.