椭球膨胀法在基于CGCS2000下建立工程独立坐标系的方法及应用

Method and Application of Ellipsoidal Expansion Method in Establishing Engineering Independent Coordinate System Based on CGCS2000

本文针对西南山区线状工程平面控制测量实践中,往往由于投影变形影响不能直接使用现行2000国家大地坐标系的现状,分析了影响投影变形的两个主要因素,并通过工程实例阐述了利用GNSS技术以及椭球膨胀法建立工程独立坐标系的方法。

This article focuses on the current situation that the current 2000 national geodetic coordinate system cannot be directly used due to the influence of projection deformation in the horizontal control measurement practice of linear engineering in southwestern mountainous areas.Two main factors affecting projection deformation are analyzed,and the method of using GNSS technology and ellipsoidal expansion method to establish an independent coordinate system for engineering is explained through engineering examples.