摘要
在选择城市坐标系统时,可根据城市中心离中央子午线的距离和城市平均高程面来选择。当长度变形值大于2.5 cm/km时,可采用投影于抵偿高程面上的高斯正形投影3°带平面直角坐标系统。本文给出了抵偿高程面的确定方法及抵偿高程面的坐标计算。
When we select a city＇ s coordinate system, we can consider distance from urban centre to median meridian and urban average level datum,when length distortion is more than 2.5 cm/km,we can use plane rectangular coordinate system of 3° zone gauss orthographic projection. This system projects on the compensated level datum. In this article, author mentions determinable method and coordinate computation about the compensated level datum.
出处
《城市勘测》
2008年第2期72-74,共3页
Urban Geotechnical Investigation & Surveying
关键词
高斯平面直角坐标系统
抵偿高程面
Gauss -Krueger plane rectangular coordinate system
projection datum plane with compensation effect
