摘要
在GPS水准中采用多项式拟合局部地区似大地水准面，对于实际工程作业具有重要的作用。本文在简述GPS水准求取高程异常方法的基础上，结合作业测区地形实际，对所采用的多项式曲面拟合模型，从拟合点分布、拟合点数量及拟合方式等对拟合精度的影响进行分析。通过各次比较分析，找出适合测区的拟合方法，得出一些有意义的结论，以供作业参考。
Fitting local quasi - geoid using the GPS leveling data has an important significance in engineering practice. Base on the fitting model and the topography of survey area, the polynomial surface fitting model is used to process, analyze and discuss the effect of the fitting point distribution, the number of fitting points and fitting ways on the fitting precision. Through the compara- tive analysis, a suitable fitting method and some conclusions are obtained that can be used for reference to engineering practice.
出处
《测绘科学与工程》
2015年第1期27-30,共4页
Geomatics Science and Engineering
关键词
GPS水准
高程异常
多项式曲面拟合
拟合精度
GPS leveling
height anomaly
polynomial surface fitting
fitting precision
