关于投影变形与公路工程坐标系选取的探讨  

Selection of Deformation and Highway Engineering Projection Coordinate System

作　　者：田奇丁 王毅[1] 张蓓[1] 

机构地区：[1]河南省地矿局测绘地理信息院,河南郑州450006

出　　处：《北京测绘》2015年第1期72-74,108,共4页Beijing Surveying and Mapping

摘　　要：坐标系的选择对一项工程来说是一项首先必须进行的工作,同时坐标系选择的适当与否关系到整个工程的质量问题,因此对坐标系的研究是一项非常重要的工作。处理控制测量数据时,通常产生两次投影变形(地面→参考椭球面→高斯投影面),由于投影误差的存在,有时满足不了工程需要。为了控制其影响,通过合理选择工程坐标系,可以有效减弱投影变形的影响。The choice of the coordinate system for a project is a must work in the first place, at the same time coordinate system to choose the appropriate or not is related to the whole project quality problems, so the study of the coordinate system is a very important and necessary job. For processing control survey data, we usually have two projection deforma tion （ground to reference ellipsoid, gauss projection plane）, as a result of the existence of the projection error, sometimes can＇t satisfy the engineering needs. In order to control the impact, through the selection of reasonable engineering coordinate system, the influence of the projection deformation is effectively reduced.

关 键 词：投影变形 长度变形 选取 

分 类 号：P226.3[天文地球—大地测量学与测量工程]