摘要
Abstract
This article discussed the application of network RTK technology combined with EGM2008 earth gravity field model in the elevation control survey of water conservancy projects.By combining network RTK technology with high-resolution EGM2008 model,the normal elevation data can be obtained and compared with the data of the national level points to verify its accuracy.In the practical application in Hezhou City,the elevation anomalies of EGM2008 model are variable within the range of-0.166m～-0.223m and the mean value is-0.193m.The correc-tion value of elevation anomaly was calculated by correcting a single control point,which further improved the sur-vey accuracy.The results of comparison demonstrate the height differences of most measured sections are less than the fifth-class leveling tolerance(30 mm),indicating the application of RTK elevation measurement technology in Hezhou City has high accuracy and reliability.The results of study show that network RTK technology combining with EGM2008 model is able to significantly improve the elevation survey accuracy and efficiency,especially in ar-eas with complex terrain and sparse population.关键词
EGM2008模型/网络RTK技术/高程异常值/RTK高程测量/水利工程Key words
EGM2008 model/network RTK technology/elevation anomaly/RTK elevation survey/water conservan-cy project分类
天文与地球科学
