抵偿高程面的选择与计算  

Selection and Computation of Projection Datum Plane with Compensation Effect

作　　者：杨元兴[1] 

机构地区：[1]浙江省测绘大队,浙江杭州310030

出　　处：《城市勘测》2008年第2期72-74,共3页Urban Geotechnical Investigation & Surveying

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.

关 键 词：高斯平面直角坐标系统 抵偿高程面 

分 类 号：P224[天文地球—大地测量学与测量工程]