GPS水准在山区替代四等水准的研究  

The Research of Substituting GPS Leveling for the Fourth-Grade Leveling in a Mountain Area

作　　者：王文庆 刘宣喜 

机构地区：[1]中铁上海设计院,上海200063 [2]安庆勘察测绘院,安徽安庆246001

出　　处：《城市勘测》2008年第4期69-71,共3页Urban Geotechnical Investigation & Surveying

摘　　要：山区四等水准测量由于道路崎岖不平、多拐弯,施测起来很困难,而GPS控制测量则能迅速提供控制点的大地经纬度和大地高,在已知少数高程点,用高差拟合分析法通过求取点的高程异常来得到各点的高程,能满足四等水准的精度要求。In mountainous regions,fourth -grade leveling wastes man＇s power and time because of the bumpiness of the ridgeway. GPS positioning technology can rapidly present the geodesic Latitude, Longitude, and height of control point. With a few height points been known,the results obtained by using the method of height difference＇s fitting and analysis can meet the precision of fourth grade leveling.

关 键 词：GPS水准 高程异常 高差拟合分析法 

分 类 号：P228[天文地球—大地测量学与测量工程]