基于空间分析方法的甘肃省经济差异分析

Economic Disparities in Gansu Province Based on Spatial Analysis

以甘肃省为例,采用Moran’s I指数测定区域经济的空间自相关性,运用GIS技术和Deoda分析了甘肃省经济差异,对2000-2008年甘肃省县域经济总体发展差异和局部空间异质性的演变特征进行了实证研究,结果表明：①从时间上看,2000年以来甘肃省经济发展的空间集聚效应明显,2002年后县域经济总体差异呈扩大趋势,且极化现象严重;2008年县域经济的集聚性增强,总体差异减小,扩散效应增强。②从空间上看,甘肃经济发展呈＂哑铃＂型的空间格局,县域经济的集聚性程度可分为河西地区经济集聚性显著区域（HH）、中部集聚性变化较大区域（HL,LH）和陇东集聚性显著区域（LL）。③甘肃省县域经济空间集聚的总体地理分布分为4种类型。

Taking Gansu as an example,Moran＇s I index method is adopted to measure regional economic spatial autocorrelation of Gansu Province.At the same time,the empirical study on overall economic evolution characteristics and local spatial heterogeneity are implemented with the help of GIS technology and Geoda software.The results show that：① From the temporal viewpoint,the spatial clustering of the economic development of Gansu Province since 2000 is remarkable.And the overall county-level economy difference has a trend of enlargement and polarization after the year of 2002.In 2008,the clustering and diffusion effect of county economy enhances with the difference reduces.② From the spatial viewpoint,spatial distribution of the economic development of Gansu province shows the shape of ＂dumbbell mode＂.Its spatial disparities can be classed into 3 different level： ①remarkable clustering area in Hexi region（HH）,②sharp fluctuated clustering area in the middle region（LH,HL）,③remarkable clustering area in the east part（LL）.③ The overall geographic spatial concentration distribution about county-level economy of Gansu province is divided into 4 types.