线性模型CPⅢ平面控制网平差方法的改进及精度分析  

Improvement and accuracy analysis on CPⅢ horizontal control network adjustment method based on linear model

作　　者：李建章[1] 李登福 杨国林[1] 

机构地区：[1]兰州交通大学测绘与地理信息学院,兰州730070 [2]江苏省工程勘测研究院有限责任公司,江苏扬州225002

出　　处：《测绘科学》2014年第3期116-119,共4页Science of Surveying and Mapping

基　　金：甘肃省自然科学基金(1212RJZA045);金川公司-兰州交通大学预研基金项目(JCYY2013015)

摘　　要：本文通过分析基于线性模型的CPⅢ平面控制网数据处理方法,可知其每一测站隐含一个尺度因子,而传统模型整个控制网共用一个尺度因子,这种差异造成两种方法解算精度不同,传统模型精度较高。作者对方法进行了改进,为了验证这种数据处理方法的可行性,开发了相关程序对多套数据进行解算,结果证明改进后的方法精度与传统方法相同。The paper analyzed the method of CPⅢ horizontal control network adjustment based on lin- ear model, and knew that： each station of the method implies one scale factor, but the traditional model shares only one scale factor within the whole network, which difference results in different precisions, while the traditional model owns higher one. The authors improved the method and developed a program to verify the feasibility of the solution. Result showed that the improved method could have the same precision with the traditional method.

关 键 词：CPⅢ平面控制网 线性模型 最小范数二次无偏估计 精度分析 

分 类 号：P207[天文地球—测绘科学与技术]