建立城市独立坐标系相关问题的探讨

Research on Establishing City Independent Coordinate With GPS

详细地阐述了利用GPS技术建立独立坐标系的椭球变换与高程投影面的选择问题。通过椭球变换模型,系统介绍了椭球膨胀法、平移法、变形法3种常用的椭球变换方法,在此基础上推证独立坐标系椭球面与平均高程面之间的相互关系;同时对高程投影面选择问题进行分析比较。

This paper discusses local independent ellipsoid transformation and projection surface choice of height using GPS technique. It describees the ellipsoid expanding model,the ellipsoid shift and ellipsoid distortion model based on a ellipsoid tranformation model. It proves the relation between the surface of independent ellipsoid and mean height surface on the basis ; and simultaneously introduces metheod of projection surface choice of height. Finally according actual example some useful conclusions are given.