高原山区局部大地水准面精化方法研究  

Research on the method of local mountain plateau quasi-geoid accuracy

作　　者：李海文[1] 罗满建 吴友平[3] 王家帮[3] 

机构地区：[1]广西建设职业技术学院土木系,广西南宁530003 [2]广西测绘局,南宁530023 [3]桂林工学院土木系,广西桂林541004

出　　处：《测绘科学》2008年第5期60-61,59,共3页Science of Surveying and Mapping

摘　　要：局部大地水准面精化的实质是精确计算出大地水准面的起伏变化情况。一般情况下,需要密度足够的重力数据,依重力异常密集计算大地水准面差距或高程异常。但是在大陆西部高原山区重力点密度是不够的,无法达到大地水准面精化的目的。本文从理论上证实了用地形和岩石密度数据进行局部大地水准面精化的可行性。In essence, local geoid refined can calculate geoid undulations changes precisely. Under normal circumstances, sufficient density of gravity data is used to calculate geoid gap or height anomaly according to gravity anomaly intensive. However, in the mountains of west, the gravity point plateau density is not enough to attain the geoid refinement. In this paper, it is confirmed that the implementation of the terrain and rock density data for local geoid refined is feasible theoretically.

关 键 词：大地水准面 挠动位 垂线偏差 

分 类 号：P223[天文地球—大地测量学与测量工程]