建立大型线路工程独立坐标系的方法

Method of independent coordinate system establishment for huge route project by GPS

本文结合大型线路工程控制测量实例,分别对根据E1、E2、E3椭球建立适合大型线路工程独立坐标系的GPS方法进行阐述。应用实测数据对采用不同椭球作为投影面得到的平面距离进行比较,结果表明,应用区域性椭球建立的GPS平面控制网的控制测量成果适合国家测量规范的要求。

Distortion of distance happens during establishing the plane control net for huge route project by GPS. By the method of establishing independent coordinate system can reduce the distortion of distance. Through a project instance, the paper discussed about how to establish independent coordinate system which is suit for huge route project by GPS according to E1, E2, E3 ellipsoids. Com- paring the plan ranges gotten by control survey with by total station survey through survey data. The result showed that data of plane control net by GPS based on regional reference ellipsoid could satisfy the requirement of national measure standards.