梯级投影在南疆新建38团引水干渠项目中的应用

Applications of Projection Step in the Water Delivery Canal Project in the Group 38 in the South of XinJiang

地图投影是测绘过程中一个常见的技术方法,旨在研究地球曲面到坐标平面的变形问题。在应用GPS技术进行工程测量的过程中,基于测量规范对投影变形的限制,常常需要建立高程抵偿面坐标系,在一些特殊地形的工程项目中,往往还要建立多级抵偿面坐标系。本文结合具体项目,针对测区投影变形特点,提出建立梯级投影坐标系思路,同时也讲述了梯级坐标系衔接及统一方法。

Map projection is a common technical methods in the surveying and mapping,it＇s objective is study the deformation from the earth surface to coordinate plane.In the Engineering surveying process,GPS are often used.As the restrictions of projection distortion in surveying specifications,Coordinate systems about elevation compensation plane are often established,however in some special projects in some special terrain,multi-level coordinate systems about elevation compensation plane are often established.With specific project,And the characteristics of Projection distortion,ideas of Projection step Coordinate system is proposed in this article.Then some methods of the cascade coordinate system is narratived in the article.