多面函数法在丘陵区GPS水准拟合中的应用研究  

Research on the Application of Multidimensional Function Method in GPS Leveling Fitting Accuracy of Hilly Terrain

作　　者：管真[1] 石风淼[1] 唐秀蓉[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《测绘与空间地理信息》2012年第1期124-126,共3页Geomatics & Spatial Information Technology

摘　　要：为提高丘陵地区GPS水准拟合精度,建立适合当地测区的拟合模型,采用多面函数法对高程异常进行拟合。通过实例对模型关键问题和拟合精度进行了分析,重点研究光滑因子的选取对核函数的影响,并与二次曲面拟合法相对比,进行了精度分析。To improve the GPS leveling fitting accuracy of hilly terrain and to build the adaptive fitting model of the coverage,this article uses the multidimensional function method to fit the height anomaly.The key points and fitting accuracy of modeling are analyzed through examples and the research puts great emphasis to finding out how the selection of the smoothing factor affects the kernel function.Compared with conicoid fitting,the fitting accuracy of multidimensional function method is also analyzed.

关 键 词：多面函数 核函数 光滑因子 双曲面 水准拟合 

分 类 号：P228.4[天文地球—大地测量学与测量工程]