大地水准测量必须使用刻度标于不胀钢片上的水准标尺。
Geodetic leveling should be done with staves in which the divisions are marked on a strip of invar.
一般说来，水准测量测出的大地水准面高程的精度，远远超过任何其它方法的精度。
In general the accuracy of geoidal heights, as given by spirit levelling, much exceeds that of any other system.
GPS技术结合高精度、高分辨率的大地水准面模型可以取代传统的低等级水准测量，真正实现GPS定位技术在几何和物理意义上的三维定位功能。
GPS technique, combined with the high precision geodetic level model, can replace the traditional low-grade leveling, and realizes 3d GPS positioning function on the meaning of geometry and physics.
在地形起伏较大地区，几何水准测量十分不便。
The traditional geometrical leveling is inconvenient in fluctuating area.
在地形起伏较大地区，几何水准测量十分不便。
The traditional geometrical leveling is inconvenient in fluctuating area.
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