基于构建Delaunay三角网和平面拟合法组合的GPS高程转换

摘要

针对地形变化引起的高程异常难以用统一的函数拟合的问题,提出构建delaunay三角网和平面拟合法组合的方法,将大区域尤其是地形变化较大的区域分成若干个小区域进行分区拟合。通过实例计算证明：相比于普通平面拟合、二次曲面拟合及支持向量基回归（SVM）模型等方法,该方法有更高的拟合精度。%By the methods of combination of building delaunay triangulation and surface fitting,to solve the problem of height anomaly caused by the terrain has not unified model to simulate.This method is put a large area especially the area＇s terrain changes dramatically divide into several small area,and then partition fitting.Through example to prove that compare with the surface fitting,secondary fitting of surface,and support vector regression（SVM）model and other methods this method has highest accuracy.