摘要
GPS在测量领域的应用给传统测量带来了历史性变革,但GPS三维坐标中的Z坐标,即大地高未能在生产实际中发挥应有的作用,使得GPS测量在确定平面坐标之后还要在测站上进行几何水准测量。如何能有效利用GPS的高程信息,把大地高转换成正常高,直接为测绘生产服务,实现GPS观测时能同时获得实用的三维坐标,值得研究。针对目前GPS水准高程研究的现状,本文引入数学曲面拟合法,并结合实例分析,总结了该拟合模型的优缺点,并给出了一些合理建议。
Application of GPS in survey area takes historic transformation,but the coordinates called Z of 3 dimension coordinates,this is geodetic elevation,can＇t take effect in practice,and must carry on geometry leveling at survey station after making certain plane coordinates.It is worth studying how to make effectively use of GPS elevation information to transform geodetic elevation into normal height,directly service production,realizes acquirement of applied GPS 3 dimension coordinates.According to current GPS level elevation study situation,the article mainly discusses the geometric model analysis of surface region,and combines theory with practice, and sums up disadvantage and advantage, then gives some reasonable suggestion.
出处
《中国西部科技》
2009年第18期52-53,共2页
Science and Technology of West China
关键词
大地高
正常高
GPS水准高程
曲面拟合
Geodetic elevation
Normal height
GPS level height
Analysis of surface region
