大地水准面差距(geoidal height)是从大地水准面沿法线到地球椭球体面的距离。包括:①绝对大地水准面差距，指从大地水准面沿法线到总椭球面的距离，可用卫星大地测...
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geoidal height map 大地水准面高度图
The effects of surface vertical displacements and gravity changes upon the geoidal height variation have been also discussed.
讨论了表面垂直位移和重力变化对大地水准面高变化的影响。
This paper has discussed how to select geoidal model and how to determine normal height in GPS survey of long distance transmission line project.
就长距离超高压送电线路工程的GPS测量中如何选择大地水准面模型，如何确定GPS测量的高程等问题进行了讨论。
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