基于Surfer的平原区域GPS高程拟合应用研究

Application Study of GPS Height Fitting that Based on Surfer Software in Plain Area

GPS测量具有速度快、精度高、适用广等优点,然而其测出的高程为大地高,需转换为正常高才能使用。如何简单、快速、精确地将大地高转换为正常高值得研究。本文介绍了一种借助Surfer软件强大的插值及等值线绘制功能建立区域高程异常等值线模型,然后利用该等值线模型求解待解算点的方法。本方法无需再借助其他软件或编制新的程序,全部依靠Surfer即可完成,可处理大批量数据,简单、实用、高效。经平原区域实例应用和其解算结果的精度评定,本方法可求解出比较满意的正常高程拟合值。

GPS surveying has the advantages of fast speed,high accuracy,extensive application,etc.But it's necessary to convert the geodetic height to the normal height with a simple,quick and accurate method.This paper introduces an isogram model of the area height abnormity to solve unknown quantity,using power.ful interpolation and isoline drawing functions of Surfer software.The method can process bath data only based on the Surfer as simply as efficiently,without using other software and compiling a new program.With the experiments of plain area and the precision evaluation of the computed results,the method can prove the satisfactory normal height fitted value.