The GPS-levelling is used to add constraints on the simulated geoid, and the "remove-restore" method and the multi-quadric function method are used to interpolation, so as to obtain the refined geoid.

利用GPS水准对模拟大地水准面进行约束，采用“移去——恢复”技术和多面函数法进行拟合内插，得到转换后的大地水准面。

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The advanced GPS technology shows good potential to replace traditional land level for elevation measurement in agricultural land levelling 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。

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