区域高程异常内插方法研究  

Research of Interpolation Methods for Area Elevation Anomaly

作　　者：沈京湘[1] 王鹤[1] 郎刚[1] 陈平川[1] 

机构地区：[1]中航勘察设计研究院,北京100098

出　　处：《北京测绘》2008年第2期23-26,共4页Beijing Surveying and Mapping

摘　　要：介绍了部分高程异常内插的方法,结合一个具体的实例,在2km×2km的小范围内采用多项式拟合内插的方法进行高程异常的逼近,运用GPS水准获得的数据进行检查,通过分析,应该采用5参数内插的方法,取得了2.8cm的精度;并据此进行高程异常内插分析,运用MATLAB编写程序对几种插值方法进行讨论。This paper introduces some fitting methods of elevation anomaly. Through a specific example, the method of polynomials fitting method is used to approach the surface of elevation anomaly in a small area, 2km 2km;through further analyzing,the fitting method of five parameters polynomials is adopted and it proves that it can reach the precision of 3.8cm by testing the fitting with some data acquired by GPS leveling. Based on these, analysis of elevation anomaly regular grid network interpolation is summarized and several interpolation methods are carried out by writing MATLB program.

关 键 词：高程异常 曲面拟合 规则格网 插值 似大地水准面 

分 类 号：P228.4[天文地球—大地测量学与测量工程]