中文摘要：

为了有效的利用GPS观测的高程信息，实现GPS观测值中的椭球高向正常高转化，采用EGM96和EIGEN—CG01C重力位模型和某区域的GPS／水准观测数据，应用几何方法确定了该区域1．5＇×1．5’分辨率的似大地水准面格网数值模型。该似大地水准面模型内插高程异常与实测GPS／水准点的高程异常进行比较，内符合精度和外符合精度均优于0．040米。表明在地形平坦地区，用平均点间距为10KM的GPS／水准点成果，可以确定厘米级的似大地水准面模型，结合GPS观测成果可以取代四等及以下几何水准测量。

英文摘要：

In order to use the information of GPS observation and to translate ellipsoid height into normal height of observation point , A regional quasi-geoid model of 1.5＇×l.5＇distinguish rate is constructed with geometry method, using EGM96 and EIGEN-CG01 gravity field models and GPS/Leveling data. The height anomaly of quasi-geoid model is compared with GPS/Leveling height anomaly. The inner and outer accuracy of is less than 0.040m. This shows that the region quasi-geoid model of centimeter accuracy can be derived from geometry method in smooth region ,using GPS/leveling data of 10kin average distance. The model and ellipsoid height of GPS can apply to substituent four-grade and lower grade leveling observation.