区域似大地水准面的非均匀B样条拟合方法探讨

Discussion on the Non-uniform B-spline Method to Determine the Regional Quasi Geoid

介绍了建立似大地水准面模型的原理,讨论了非均匀B样条函数方法的基本原理。根据中部某地区的已知点的大地高和正常高,分别用非均匀三次B样条函数和三次曲面函数对该地区的似大地水准面进行高程拟合,结果表明了该方法具有更好的精度和稳定性。

The principles of the quasi-geoid model is introduced, and the basic principles of non-uniform B-spline method is discussed in this paper. It fits height on the quasi-geoid of this region by using non-uniform three B-spline method and three surface method separately according to the geodetic height and normal height of the known points of a certain area in central. Results show that the non-uniform B-spline method has better accuracy and stability.