GPS测量技术结合小三角网建立独立控制网的应用研究

The Application Study on Combining GPS Survey Technology with Small Triangulation Network to Establish Local Independent Coordinate

简述了建立地方独立坐标系统的原因和方法,并对各方法的适用性进行了分析。针对在已施工矿区建立独立控制网中需要注意的问题,提出了不改变区域性椭球面及中央子午线利用GPS测量技术结合小三角网建立独立控制网的原理和方法,结合具体工程实例,建立了一种既与国家坐标系有严密参数换算关系,又能保证边长投影变形在规定范围内的地方独立控制网,并和相关数据进行了比较和分析,此方法特别适用于难于联测国家控制点和已经开展工程项目作业的地质勘探项目。

Briefly introduced the reason and method of established local independent coordinate, and the applica- bility of various methods were analyed.Directed at problems in established local independent coordinate on con- structed mine area, proposed the principle and method depend on must not change reference ellipsoid and middle meridian established local independent coordinate combined with small triangulation network.The method is also used to establish local independent coordinate in actual engineering.The local independent coordinate has strict transition relation with state coordinate system as well as ensure accuracy limits about length deformation, the fac- tual data is also compared and analyzed.The method is suitable for geology prospected project about hard to survey connect to state dominate spot and constructed mine area.