EGM2008模型在小型水库高程基准统一测量中的应用  

Application of EGM2008 Model in Unified Survey of Small Reservoir Elevation Datum

作　　者：彭祥国 王学剑 万红星 PENG Xiangguo;WANG Xuejian;WAN Hongxing(China Railway Water Conservancy&Hydoopower Planning and Design Group.Co,Ltd.,Nanchang 330029,China)

机构地区：[1]中铁水利水电规划设计集团有限公司,江西南昌330029

出　　处：《测绘与空间地理信息》2022年第3期37-40,共4页Geomatics & Spatial Information Technology

基　　金：江西省水利厅一般科技课题(202022YBKT10)资助。

摘　　要：针对小型水库管理中高程基准不统一的情况,本文提出了在接测少量控制点的情况下采用网络RTK技术进行大范围高程基准传递,并应用基于EGM2008模型的多面函数法进行高程成果检核,剔除测量中存在的粗差,分析比较网络RTK测量所能达到的精度等级。通过2个实例验证,网络RTK技术高程测量中误差分别达到±5.13 cm和±3.19 cm,能达到五等或图根等级高程控制点的精度,满足小型水库管理对高程基准精度的要求,同时也说明在接测少量控制点情况下,采用网络RTK进行大范围复杂地形条件高程基准传递具有可行性,为类似项目开展提供了一定的参考依据。Aiming at the disunity of elevation datum in the management of small reservoirs,this paper proposes to use network RTK technology to transfer large-scale elevation datum when a small number of control points are measured,and applies the polyhedral function method based on EGM2008 model to check the elevation results,eliminate the gross errors existing in the survey,and analyze and compare the accuracy level of network RTK survey.Through the verification of two examples,it is verified that the mean square error of network RTK technology in elevation measurement is±5.13 cm and±3.19 cm respectively,which can reach the accuracy of fifth grade or map root grade elevation control points,and meet the requirements of elevation datum accuracy for small reservoir management.At the same time,the results also show that it is feasible to use network RTK to transfer elevation datum in large-scale complex terrain conditions under the condition of a small number of control points,it also provides a certain reference for similar projects.

关 键 词：EGM2008模型 小型水库 多面函数法 网络RTK技术 高程基准 

分 类 号：P208[天文地球—地图制图学与地理信息工程]