加权二次曲面高程拟合方法及精度分析  

The Method of Weighted Quadratic Surface Height Fitting and Accuracy Analysis

作　　者：张之孔[1] 

机构地区：[1]68029部队

出　　处：《测绘科学与工程》2011年第2期26-28,共3页Geomatics Science and Engineering

摘　　要：在工程测量中经常需要将GPS所测得的大地高转换为工程上所采用的正常高。由于重力测量、水准测量等传统方法费时、费力，因此，需要一种既快速又准确的高程转换方法。本文在已有的二次曲面拟合模型的基础上，以距离平方的倒数定权，将加权二次曲面拟合模型应用到国家重大工程测量中，对测量数据进行了对比分析，验证了该方法的优越性。In engineering project, the geodetic height obtained by GPS is constantly needed to be converted into the normal height. Beacause the gravity survey, leveling and other traditional methods are tinle - consuming and strenuous, a quick and accurate method for height convertion is required. The improved quadratic surface fitting method weighting with the inverse of the square of the distance is applied to the major national construction surveying project, and the result shows that the accuracy of this method was verified.

关 键 词：高程异常 大地水准面 二次曲面拟合 加权二次曲面拟合 

分 类 号：P221[天文地球—大地测量学与测量工程]