摘要
针对工程测量中GPS大地高代替水准正常高的问题,该文根据邵阳市实测GPS、水准数据,采用二次曲面拟合模型得到了该地区高程拟合参数。通过正常高与拟合高程进行比较,最大拟合残差为3.9cm,最小为0cm,高程异常模型拟合中误差为1.85cm,证明了该区域GPS高程拟合参数可以满足工程建设中大地高代替正常高的要求。根据GPS高程拟合参数得到的邵阳市辖区及周边地区高程异常曲面具有由西北至东南递减且变化梯度逐渐递减的特征,该区域最大高程异常15.65m,最小高程异常14.75m。
In this paper,we propose a method combined with the surface fitting to solve the GPS height anomaly.This paper has obtained the elevation fitting parameters of Shaoyang city according to the measured GPS and the level data of this area,combined with quadric surface fitting model.By comparing the normal height with the fitting height,the maximum fitting residual is 3.9cm,the minimum is 0cm,and the error of the elevation anomaly model is 1.85 cm.Therefore,the GPS height fitting parameters in this area can meet the requirement of geoidal height instead of normal height in the project construction.The elevation anomaly surface of Shaoyang City and surrounding area obtained from GPS height fitting parameters has the characteristics of decreasing from northwest to southeast and decreasing gradient gradually.The maximum elevation anomaly is 15.65 mand the minimum elevation anomaly is 14.75 m.
作者
刘国仕
邓才林
唐健林
LIUGuoshi DENGCailin TANG Jianlin(Shaoyang University, Shaoyang, Hunan 422000, China Hunan Institute of Geology Survey, Changsha 410000, China Institue of Geological Survey- ing and Mapping of Hunan Province, Hengyang, Hunan 421001, China)
出处
《测绘科学》
CSCD
北大核心
2017年第8期69-72,共4页
Science of Surveying and Mapping
基金
湖南省自然科学基金项目(2016JJ6135)
湖南省教育科学"十三五"规划项目(XJK016CGD005)
邵阳学院-长沙理工大学-中国有色金属长沙勘察设计研究院有限公司测绘工程校企合作人才培养省级示范基地项目
关键词
GPS
正常高
大地高
高程异常
曲面拟合
GPS
normal height
geodetic height
height anomaly
surface fitting
