摘要
针对GPS水准中常用拟合方法的不足,给出一种基于二次曲面的Shepard拟合法。通过某测区GPS水准实测数据,采用二次曲面拟合法、Shepard拟合法、多面函数法和基于二次曲面的Shepard拟合法对测区高程异常进行拟合,结果表明,基于二次曲面的Shepard拟合法计算得到的高程异常的精度和可靠性最高。
Because of some disadvantages of current methods in GPS leveling, this paper introduces a fitting method-Shepard fitting method based on quadric surface. The fitting methods, such as quadric surface fitting, Shepard curved surface fitting, hardy function interpolation and Shepard fitting method based on quadric surface are used, in approximating height anomaly in a test area. The results show that the precision and reliability of approximating height anomaly by Shepard fitting based on quadric surface are preferable.
出处
《测绘工程》
CSCD
2007年第1期36-38,共3页
Engineering of Surveying and Mapping
关键词
GPS水准
高程异常
曲面拟合
：GPS leveling
height anomaly
curved surface fitting
