基于CGCS2000的城市平面坐标系最佳选取  

Optimal selection of urban Gauss plane coordinate system with CGCS2000

作　　者：李江卫[1,2] 白洁[2] 郭际明[1] 严小平[2] 

机构地区：[1]武汉大学测绘学院,武汉430079 [2]武汉市勘测设计研究院,武汉430022

出　　处：《测绘科学》2011年第4期63-65,共3页Science of Surveying and Mapping

基　　金：国家863计划资助项目(2008AA127308);精密工程与工业测量国家测绘局重点实验室开放基金(PF2009-9)

摘　　要：本文以CGCS2000启用后城市平面坐标系的选取和确定为研究内容,提出了以投影改正平方和最小与投影变形大于2.5cm/km的点数最少为原则进行最佳中央子午线和抵偿高程面选取的方法,并以武汉市为例,通过实际控制点的CGCS2000大地坐标予以实现。相比常规方法,该方法更科学、严谨,比较客观地反映了区域地形起伏对平面坐标系确定的影响,对各地选取和确定CGCS2000框架下的平面坐标系具有一定的借鉴作用。This paper addressed the selection of urban Gauss plane coordinate system after China Geodetic Coordinate System 2000 （CGCS2000） being adopted as a new geocentric coordinate system of China. Searching for optimal centric meridian and compensation plane in one of the follow two conditions, the sum square length of projection and deformation meets minimum, or the numbers of the points with distortion of projection more than 2. 5cm/km are least. This paper performed these with actual control points in Wu- han, using CGCS2000 coordinates. Comparing with general methods, this method was more precise. It displayed the effect of terrain variety in selecting of horizontal coordinate. This paper gave a general reference in choosing for urban coordinate system in CGCS2000.

关 键 词：CGCS2000 投影变形 任意带中央子午线 抵偿高程面 

分 类 号：P221[天文地球—大地测量学与测量工程]