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.
出处
《城市勘测》
2011年第2期118-123,共6页
Urban Geotechnical Investigation & Surveying
关键词
CGCS2000
投影变形
任意带中央子午线
抵偿高程面
CGCS2000
distortion of projection
arbitrary zone central meridian
Compensating level surface
