The study selects some representative methods of estimation in spatial variables as objects, including Inverse Distance Weighting in the traditional space estimation;
本研究选取比较有代表性的几种空间估计方法：传统空间插值方法中的反距离加权法和趋势面法；
Using the areal weighting interpolation and inverse distance weighted averaging, a spatial distribution model of GDP is established in this paper.
文章采用栅格数据模型，运用面积权重法和反距离加权法对GDP值进行了空间拓展。
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