山区GPS水准的应用探讨

通过对GPS测高与水准测量理论及其异同分析的基础上,阐述了确定似大地水准面的原理与方法,分析了用数学模型法,用少量GPS与水准重合点将GPS大地高直接转换为具有厘米级正常高的实现方法。实验结合长春净月区山地的地形特点,提出了用二次曲面拟合模型法来拟合GPS水准,证明在长春净月山区可以通过少量且分布合理的水准点来直接求出该地区具有厘米级的正常高,且精度可以达到图根控制点的精度要求,满足一般工程的需要。

Study on the Application of a mountainous Area GPS Level Surveying Method

Through to GPS measured that high with the leveling theory and in the similarities and differences analysis′s foundation,elaborated Determination of the quasigeoid the principle and the method,has analyzed with mathematics modeling,the scheme achieving height transformation with a cm-level precision by a few GPS points and leveling points is searched.Taking the terrain characteristics of the Changchun Jingyue area in account,Calculates the GPS Level with the quadratic equation model, the approaches adapting to different surveying projects are used to realize height transform here. Proved by practice, the normal heights with a cm-level precision of this region, can be achieved by a few reasona- bly distributed leveling points, which can meet the demand of Chart with control point and general surveying projects.