当GPS(Global Positioning System)高程不能用于工程目的时,需要进行高程转换.研究了用于将GPS高程转换为正高的一种简单算法--基于示例的学习方法.结果表明,该法能够给出优于30mm的高程转换精度,但距离的较高次方也会降低算法的质量.此外,提出了改进算法的一些建议.%Height transformation is needed as GPS(Global Positioning System) heights cannot be used for engineering purposes. A relatively simple algorithm, "a type of instance based learning (IBL) method", can be used for the conversion of GPS heights to orthometric heights is studied in this paper. The results show that it can give accuracy of less than 30mm and higher powers of distance can also reduce the quality of the algorithm. In addition, some effective suggestions to improve the quality of the algorithm are made.
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