高斯投影是在大地测量学、地图学、工程测量学等领域得到极其广泛应用的一种地图投影。传统上高斯投影为限制东西方向变形需要分带，应用于东西跨度较大的长线工程时，频繁分带繁琐，信息要素表达零散，而且拼接又极易产生人为误差。为克服分带缺点，提高高斯投影的使用效率，有效降低高斯投影的长度变形，项目提出使用斜轴高斯投影。本项目拟以计算机代数为工具，运用空间解析几何理论，通过椭球的旋转、平移、收缩，系统地研究斜轴高斯投影理论，并建立一整套系统的斜轴高斯投影工程应用算法体系。主要内容包括分别以长线工程法截线和大椭圆线为基础的斜轴高斯投影理论和算法研究、以椭球变形为基础的斜轴高斯投影理论和算法研究、结合典型长线工程的斜轴高斯投影变形分析。项目的研究成果可应用于对变形具有较高要求的高铁线路、高速公路、输油管线和流域规划等长线工程的施工建设，也可广泛应用于我国自然水系、区域整治和经济带精确表述。

Gauss projection, as one kind of map projection, has found its wide application in geodesy, cartography and engineering surveying. Conventionally speaking, Gauss projection is very applicable to a region in the south to north directions. When Gauss projection is applied to a region in the east to west directions, it has to be divided into different projection zones. In this case, different coordinates transformations bring a lot of unconvenience and may introduce artificcel errors. In order to overcome these shortages and improve the practical effiency of Gauss projection, the oblique Gauss projection is proposed in the project. This will make projection zone fit the region to be projeted well and effectively reduce the distortoon errors. The project will make full use of computer algebra systems. Based on the analytical geometry, the oblique Gauss projection theory will be systematically investigated for the transformation, drift and deformation of ellipsoids. The main contents include three relatively independent parts. First, the oblique Gauss projection algorithm based on the normal section of ellipsoids is introduced and researched in detail. And then, the oblique Gauss projection algorithm based on the great ellipse of ellipsoids is introduced and investigated. The third part is the Gauss projection theory and algorithm based on the deformation of ellipsoids. Finally, the applications of the oblique Gauss projection in high-speed railway construction are discussed. The research achievements can be applied to the accurate surveying in high-speed railway, highway, oil pipeline, drainage area plan and economical zone constructions.