考虑高程的雨量反距离权重插值法研究

Research of the Inverse Distance Weighted Interpolation Method Considering the Elevation

在普通反距离权重插值法的基础上,采用考虑高程的反距离权重插值法,在山区和山区、平原混合地形区分别进行了雨量插值。结果表明:1在山区,考虑高程的反距离权重插值法可明显提高插值精度,且搜索半径越小,插值越精确;2在山区、平原混合地形区,普通的反距离权重插值法精度较高,但是搜索半径变小时,误差也有一定减小;3通过贵州西部地区插值结果的对比,认为权重指数α=2时结果比较理想。

The distinction of the inverse distance weighted interpolation considering elevation in mountainous area and mixed terrain of mountainous area and plain was analyzed. The results indicate that firstly, the inverse distance weighted interpolation considering elevation can increase the precision in mountains and the smaller search radius, the higher precision; secondly, in a mountains and plain mixed terrain, the common inverse distance weighted interpolation is better, at the same time, the deviation will be decrease with a smaller search radius ; finally, with the distinction of the results in the west of Guizhou Province, it is thought to be a suitable result when the weight index is 2.