To improve the GPS leveling fitting accuracy of hilly terrain and to build the adaptive fitting model of the coverage, this article USES the multidimensional function method to fit the height anomaly.
为提高丘陵地区GPS水准拟合精度，建立适合当地测区的拟合模型，采用多面函数法对高程异常进行拟合。
Some popular methods for GPS-leveling fitting are compared. The advantages of an improved method with height anomaly model are pointed out specially.
针对目前GPS水准拟合中几种主要方法及其存在的问题进行了讨论，特别指出了顾及高程异常模型的改进方法的优点。
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