GPS高程拟合模型方法的研究与分析

Research and Analysis of GPS Elevation Fitting Model Method

以某地区68个点作为实验数据,选择其中的49个点作为已知点来确定该地区的GPS高程拟合模型,其余19个点作为检校点来检验GPS高程拟合模型的精度,采用二次多项式曲面拟合、双三次多项式曲面拟合和移动三角面多项式曲面拟合来构建高程拟合模型。通过实验分析出,这3种方法的精度均能达到四等水准测量精度的要求,并且移动三角面多项式曲面拟合模型的计算精度最高。

In this paper,68 points are selected as experimental data,49 points are selected as known points to determine the GPS elevation fitting model in this area,and the other 19 points are used as calibration points to test the accuracy of the GPS elevation fitting model.In this paper,quadratic polynomial surface fitting,bicubic polynomial surface fitting and moving triangular polynomial surface fitting are used to construct the elevation fitting model.Through experimental analysis,the accuracy of these three methods can meet the requirements of fourth-order leveling accuracy,and the calculation accuracy of moving triangular polynomial surface fitting model is the highest.