摘要
全球导航卫星系统(GNSS)已经广泛应用到各类工程项目中,但其测量的高程信息是大地高,而我国采用的是正常高系统,两者存在高程异常。因而,针对不同的测量项目,如何把GNSS测得的大地高转换为正常高一直是研究的热点问题之一。以安徽省淮北市闸河治理工程为研究平台,以提高项目测量精度为研究目标,通过分析多项式曲线、三次样条曲线和多项式曲面三种拟合方法的原理,运用三种方法进行高程拟合,计算出高程异常值并展开精度分析,求出内符合精度分别为±1.5 cm,±1.1 cm,±1.8 cm;外符合精度分别为±2.3 cm,±1.5 cm,±3.0 cm。得出在淮北市闸河治理工程中使用三次样条拟合法精度较高,可以满足四等水准测量要求,研究成果可在淮北平原其他河道工程治理中推广和应用,具有一定的实践意义。
The Global navigation satellite system(GNSS)has been widely used in various engineering projects.However,the elevation information measured is the geodetic height,while the normal height system is used in China.Due to the abnormal elevation between the two height systems,elevation conversion is a hot issue.Taking the Zhahe River comprehensive treatment project in Huaibei,Anhui Province as the platform,the improvement of the project measurement accuracy as the research objective,by analyzing the principles of polynomial curve fitting method,cubic spline curve fitting method and polynomial surface fitting method,three methods are used for elevation fitting to calculate elevation anomaly of the three methods and accuracy analysis is carried out.The values of internal coincidence accuracy is±1.5 cm,±1.1 cm and±1.8 cm,respectively.In contrast,the values of external coincidence accuracy is±2.3 cm,±1.5 cm and±3.0 cm.The results imply that the cubic spline fitting method used in the Zhahe River treatment project of Huaibei city has high precision and can meet the requirements of fourth-class leveling.The analysis method has certain reference and application significance for river treatment projects in Huaibei plain.
作者
戴洪宝
许继影
彭大珑
DAI Hongbao;XU Jiying;PENG Dalong(School of Environment and Surveying Engineering,Suzhou University,Suzhou 234000,China;School of Resources and Civil Engineering,Suzhou University,Suzhou 234000,China)
出处
《宿州学院学报》
2022年第6期36-40,共5页
Journal of Suzhou University
基金
安徽省高校优秀拔尖人才项目(gxgnfx2020107)
宿州学院重点科研项目(2019yzd01)
宿州学院质量工程项目(szxy2020hhkc02)。
关键词
高程拟合
高程异常
拟合精度
对比分析
河道治理
Elevation fitting
Abnormal elevation
Fitting accuracy
Comparative analysis
River treatment
