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.
利用成都市似大地水准面模型探测和分析了两个传统高程控制网中可能存在的系统偏差。
The systematic bias of the two traditional vertical network was detected and analyzed by use of Chengdu quasi-geoid.
介绍了GPS高程的应用理论，大地水准高的计算方法以及利用曲面拟合法计算大地水准面高，并对结果进行了分析，绘制出高程异常等值线图。
The paper introduces the application theory of GPS height and both the general method and the curved surface fitting method to measure geodetic height.
介绍了GPS高程的应用理论，大地水准高的计算方法以及利用曲面拟合法计算大地水准面高，并对结果进行了分析，绘制出高程异常等值线图。
The paper introduces the application theory of GPS height and both the general method and the curved surface fitting method to measure geodetic height.
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