区域坐标转换模型对比分析

针对全国范围内开展的CGCS2000的建立工作,文中分析讨论了区域坐标转换中常用的平面四参数模型、仿射六参数模型和多项式逼近模型,以四川某区域施工坐标系与CGCS2000的转换工作为例,展开探讨.通过三种模型计算,发现平面四参数模型和仿射六参数模型容易受到系统误差影响,不适用于施工坐标系向CGCS2000的转化;而多项...

Comparative analysis of regional coordinate transformation models

In view of the establishment of CGCS2000 in China,in the paper,the plane four parameter model,the affine six parameter model and the polynomial approximation model were analyzed and discussed,which were used commonly in regional coordinate transformation,and taking the transformation between the construction coordinate system and CGCS2000 in a regional in Sichuan as an example,the discussion was unfolded.Through the calculation of the three models,it was found that the plane four parameter model and the affine six parameter model were easily affected by the system errors,and were not suitable for the transformation from the construction coordinate system to the CGCS2000;while the polynomial approximation model had achieved the good conversion effect,and the maximum error of X coordinate was 0.08243 m,the minimum error was-0.2464 m,the maximum error of Y coordinate was 0.16171 m,the minimum error was -0.11217m,and the overall coordinate conversion accuracy was higher.