基于无缝二维基准转换模型研究

Research on Seamless Two Dimensional Datum Conversion Model

在空间大地测量以及工程建设中常涉及到不同的二维坐标之间的相互转换。传统坐标转换方式通常采用四参数转换模型。本文首先在高斯一牛顿法的基础上将二维基准转换联合模型转化为线性模型，然后采用拟合推估法求解。运用无缝二维基准转换模型进行坐标转换，联合处理求解转换参数与非公共点的转换。最后模拟仿真，结果表明该方法比传统二维坐标转换模型和整体最小二乘基准转换模型精度更高。

In space geodetic and engineering construction,the transformation of different two-dimensional coordinates is often involved.The four parameter transformation model is usually used in the traditional coordinate transformation.In this paper,based on the Gauss Newton method,the two dimensional datum conversion joint model is transformed into a linear model,and then the fitting and estimating method is used to solve the model.The coordinate conversion is carried out by the seamless two dimensional datum conversion model,and the conversion between the conversion parameters and the non-public points is solved jointly.The simulation results show that the method is more accurate than the traditional two dimensional coordinate transformation model and the whole least square base conversion model.