摘要
分析了高斯投影、兰勃特投影及常用的双重投影模型在建立坐标系过程中存在的变形情况,提出了高程补偿法建立平面坐标系的方法,该方法在不改变每条边方向的前提下,改正每条边的长度并重新解算各控制点的平面坐标,很好地解决了长度变形的问题,并且真正实现了全线统一平面坐标系的目的,为高铁的施工提供了便利。
Currently,double projection is mostly used to create the coordinate system of high-speed railway.With this method,only one projection zone is needed to keep the length deformation of the projection plane within 10 mm/km,however,this method does not take the impact of projection length deformation caused by elevation naturalization into consideration.In this paper,a new method is proposed to establish the coordinate system by elevation compensation to construct the whole line coordinate system.
作者
林伟华
苏芬
余锐
LIN Weihua SU Fen YU Rui(Guangdong Geo-Engineering Company, Guangzhou 510000, China Guangzhou Urban Planning Survey Design and Research Institute, Guangzhou 510060, China)
出处
《测绘地理信息》
2017年第5期33-35,共3页
Journal of Geomatics
关键词
高铁控制测量
高程补偿
双面投影
投影带
high-speed railways control survey
elevation compensation
double projection
projection zone
