摘要
采用GPS相对定位测量方法改造、扩建或加密控制网,一般都要沿用原有测量坐标系统,但由于种种原因无法取得原坐标系的参数,成为二维约束的难题。在列举城市常用的坐标系的基础上,通过分析和研究平面坐标系及其与中央子午线收敛角间的关系,推导出坐标系中关键参数-中央子午线的算式,解决二维约束问题。
The former coordinate system is usually used for rebuilding, expending or densifying con- trol-net with GPS relative positioning. But the question is that the former system reference data usually can not be obtained. This paper deduced the formula of the key data in coordinate system central meridi-an to solve two-dimension control data.
出处
《全球定位系统》
2007年第3期30-34,共5页
Gnss World of China
关键词
坐标系
大地投影
高斯投影
方位旋转角
中央子午线
子午线收敛角
Coordinate system
geodetic projection
Gauss projection
azimuth rotation angle
me-ridian convergencel length ratio
