介绍了GPS高程拟合速度快、作业条件简单、经济效益显著等优点，阐述了提高GPS高程拟合精度的方法，主要对铁路勘测中，二次多项式曲面拟合模型及平面拟合模型的适用性进行了探讨，以快速、准确的确定测区内的水准拟合成果。%This paper introduced the GPS elevation fitting quickly speed,simple operation conditions,economic benefit remarkable and other ad-vantages,elaborated the method improving the GPS elevation fitting precision,mainly discussed the applicability of two polynomial surface fitting simulation and plane fitting model in railway survey,in order to quickly and accurately determine leveling fitting results in the survey region.
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