Generally, under the case of enough amounts and evenly distributed of coincident points, the accuracy of GPS height fitting can meet the requirement of the fourth order leveling network.
一般在重合点数量充足且分布均匀的情况下，GPS高程拟合的精度可达到四等水准网的精度要求。
With the engineering practice, the auhtor select some methods to deal with height fitting of a GPS control net of Guangdong province.
结合工程实际，对广东某市GPS网的GPS高程和联测的几何水准采用多种拟合方式进行拟合。
The key of GPS leveling across sea is that the height datum on each side of channel is not consistent, so the general geometrical fitting method can not be used directly.
GPS跨海水准的关键问题是海峡两侧的高程基准不一致，因此无法采用常规的数值拟合方法。
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