基于Kriging估计的GPS高程转换

GPS Height Transformation Based on Kriging Algorithm

随着GPS测量精度的不断提高,其平面测量已经在多种领域得到应用,成为测量工作的一个全新的手段与工具,但在GPS测高方面需要改善和研究。Kriging方法是地统计学的基本方法,其理论核心是变异函数,它是一种最好的线性无偏估计法,在地理学、生态学、环境科学等领域都得到了广泛的应用,取得了很好效果。本文在详细介绍kriging法的基础上,建立了Kriging法的GPS高程拟合模型,利用该模型对两个实例的GPS高程数据拟合,得到了正常高,结果表明Kriging法在GPS高程拟合中的应用精度达到厘米级,且得出了一些有益的结论,为以后GPS高程的应用提供一些参考。

With the continuous improvement of GPS＇s accuracy, GPS has been used in many planar survey field, and it has been become a brin - new means and tools in the geodesic field, but it is necessary to improve and study for the GPS height surveying. Kriging is the basic method of geostatistics,with semivariogram as ils theoretieal core, Kriging is the best method of estimate linear impartial, which has been widely applied in other fields, such as geography, ecology, environmental science and comes into good effects. In this paper,the model of GPS elevation interpolation by using the Kriging method is established,the relative data analysis based on the compiled program is done, the application of Kriging used in GPS height interpolation is studied ,which based on the introduction of Kriging in detail. The results indicate that GPS normal heights can reach cectiateter aecaracy by the method . The author draws some useful conclusions and provide some reference for the future GPS applications.