双重投影在高速铁路测量中的应用分析

Application Analysis of Double Projection in High-Speed Railways Surveying

针对目前我国高速铁路测量采用的高斯投影独立坐标系每个投影带可控制范围太小,给施工带来很多不便的问题,提出了首先将椭球面经纬度投影至球面后再沿铁路线方向进行斜墨卡托投影的原理、方法和计算步骤,并通过算例分析其在高速铁路测量应用中的可行性,该投影方法与目前施工单位正在使用的高斯投影相比较具有明显的优点。

The controllable range of projection area of the independent coordinates in Gauss Projection which is being used in the High-Speed Railways Surveying presently is too small, so much trouble has been brought in construction. The theory, method and computational process of Slope Mercator Projection along railways are presented after longitude and latitude has been projected on the spherical surface. The feasibility of that in the high-speed railway surveying is analyzed through the experiment data. This method is much more appropriate than Gauss Projection which is being adopt by some construction enterprises in the High-Speed Railways Surveying.