基于CGCS2000的城市平面坐标系最佳选取  

The Optimal Selection of Gauss Plane Coordinate System of Cities With CGCS2000 Being Adopted

作　　者：李江卫[1] 解斌[1] 蔡国兴[1] 白洁[1] 

机构地区：[1]武汉市勘测设计研究院,湖北武汉430022

出　　处：《城市勘测》2011年第2期118-123,共6页Urban Geotechnical Investigation & Surveying

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和投影变形大于2.5 cm/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。This paper addresses the selection of cities＇ Gauss plane coordinate system after China Geodetic Coordinate System 2000（CGCS2000） being adopted as a new geocentric coordinate system of our country.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 that distortion of projection is more than 2.5cm/km.is least.This paper performs these with actual control points in WuHan,using CGCS2000 coordinates.Comparing to general methods,this method is more precise.It displays the effect of terrain variety in selecting of horizontal coordinate.This paper gives 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：P226[天文地球—大地测量学与测量工程]