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。
This paper has discussed how to select geoidal model and how to determine normal height in GPS survey of long distance transmission line project.
在农田土地平整作业中，利用先进的GPS技术替代传统的人工水准仪测量方法对田面高程进行测量具有较好的可行性。
The advanced GPS technology shows good potential to replace traditional land level for elevation measurement in agricultural land levelling project.
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.
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