摘要
介绍了GPS测量高程转换为水准高程的原理和方法,通过对转换精度的分析,提出一种将直接法与拟合法相结合的联合拟合法。对于高程异常复杂地区,建议采用多维高阶曲面拟合法。最后通过分析得出,EGM96模型与曲面拟合相结合的联合拟合法拟合的正常高高程精度能满足一般工程建设的精度要求;利用多维高阶曲面拟合法可解决存在两个或两个以上凹凸面地区的高程异常改正问题。
Principle of GPS height is changed to leveling height and several methods are introduced in this paper, and by way of the analysis discussion to the changed precision. The uniting fitting that direct approach and fitting are combined is put forward. In order to solve height anomaly in the fairly complicated district, the author suggests using the method of multidimensional polynomial fitting. The conclusion is reached through the example analysis： with methods of uniting fitting that the curved-surface fitting combined with EGM96 model. The fitting precision is raised with muhidimensional polynomial fitting, it can be solved when elevation abnormal has two or more than two concave or convex surface.
出处
《地矿测绘》
2007年第2期5-8,共4页
Surveying and Mapping of Geology and Mineral Resources
