斜轴兰勃特投影在高速铁路上的应用研究

Application of oblique Lambert projection in high speed railway

针对在东南—西北、东北—西南向的高速铁路工程项目建设过程中,现在采用的高斯投影需要建立较多投影带、所能控制的范围小、各投影带间坐标转换复杂,投影带边缘变形大、不利于数据共享等突出问题,文章提出采用斜轴兰勃特投影的方式。文章对斜轴兰勃特投影如何建立平面坐标系进行描述,并对斜轴兰勃特投影与高斯投影的长度变形进行对比分析,确定它们的控制范围及变形的优缺点,从而对普遍运用的高斯投影与文中研究的斜轴兰勃特投影有一个直观明了的对比,最后根据数据的研究与比较得出倾斜方向高速铁路工程坐标系统的建设在采用斜轴兰勃特投影时对比高斯投影在分带上具有明显优势的结论。

In the southeast, northwest and northeast-southwest to the process of high speed railway constructionproject, today the need to build more projection with Gauss projection, can control range is small, the coordinatetransformation between the projection with complex, projection edge deformation is large, go against such outstandingproblems as data sharing, put forward the way of the inclined shaft Lambert projection. In this paper, the obliqueLambert projection is described how to build a plane coordinate system, and the length of the inclined shaft, Lambertprojection and Gauss projection deformation are analyzed, determine the scope and the advantages and disadvantages ofdeformation control, by the widespread use of Gauss projection and in this paper, the research of the inclined shaftLambert projection has a obvious contrast, according to the data of the study compared with sloping direction of highspeed railway engineering coordinate system of the construction in the inclined shaft Lambert projection whencompared with Gauss projection has obvious advantages in points with conclusions.