POPULATION DISTRIBUTION AND THE INFLUENCING FACTORS BASED ON ESDA
利用ESDA技术和GIS平台，分析2005年中国县域人口密度差异，发现人口集中在京津冀、长三角、珠三角等区域，气候和地形是主要自然影响因素，产业结构和交通也有显著影响。
Based on the ESDA technique and GIS platform,with statistic data of counties in 2005,this paper confirms that there is a large population density gap between counties in 2005 because the Gini coefficient is 0.55.And the global spatial autocorrelation of population distribution is significant because Moran's I scores 0.42.Populations are mostly concentrated in Beijing-Tianjin-Hebei area,Yangtze River delta area,Pearl River delta area,Sichuan basin regions and the northeast economic zone.According to the result of local spatial autocorrelation analysis,Beijing-Tianjin-Hebei area,Yangtze River delta area,Pearl River delta area and Sichuan basin area are the high-high regions.The low-high regions are lying around the high-high regions.Some cities such as Harbin,Changchun,Yinchuan and Kunming are the high-low concentration areas.The arid region of northwest China,majority of semi-arid area,northern area of Mongolia plateau,and the northern mountainous area of the northeast China are low-low regions.Location of population gravity center and results of calculating population density with natural influencing factors prove that climate and elevation are still the main natural influencing factors.Meanwhile industrial structure and transportation significantly influence population distribution.Different combinations of natural factors have different effect on population distribution.For a long term,climate and terrain factors stability affect population distribution.But its influence will be weakened by progress of technology.Economic development is the main factors that change population distribution for a short term.