基于Matlab的七参数坐标转换研究与实现

Implementation of seven parameters coordinate conversion based on Matlab

工程测量中,为了降低投影带来的变形过大问题,一般选择建立自己的独立坐标系统,不同坐标系之间的坐标转换成为迫切需要解决的问题。利用Matlab7.0软件中线性最小二乘拟合函数求取布尔莎坐标转换模型中的七参数,通过设计软件计算得到转换后的坐标和若干点间距离,并与相似模拟实验中钢尺测量的实际距离进行比较,得出基于布尔莎七参数坐标转换满足实际工程应用要求。

The engineering survey ,in order to reduce the projection of the problems of large deformation , generally chooses to build its own independent coordinate system . The coordinate conversion between different coordinate system becomes a problem urgently to be solved .In this paper ,Matlab 7.0 software is used to calculate Boolean Sally seven parameters by the linear least squares fitting function , and the distance between the transformed coordinates and the actual distance measured values of a number of points .Comparing with actual distance measured value in the similar simulation experiment by the steel rule ,it can meet the requirements of practical engineering application based on coordinate conversion of Boolean Sally seven parameters .