摘要
以2004年江苏省沛县村级人口数据为基础,采用GIS空间分析的方法综合研究了道路对人口分布的影响。首先,运用泰森多边形做边界替代,计算出各行政村的人口密度,经过探索性数据分析,选取最优模型——指数模型对人口密度进行普通克里格插值,结果表明沛县人口密度的高值区域呈现为东北——西南的带状分布,其形状表现为块状集聚,带状延伸的特点。然后,建立道路1 000 m以内的缓冲区,基于运用缓冲区人口模拟函数得出缓冲区内的人口密度,运用GCAWI法,对人口数据进行格网化处理,得到道路人口密度图,结果显示沛县大部分人口集聚在距道路0～300 m的缓冲区范围内。通过对两种方法的对比,发现GCAWI法得出的结果更符合人口分布的实际情况。
Using village population of 2004 in Pei County,the influence of road on county population distribution is analyed with the method of spatial analysis in GIS.First,population density of each village in Pei county based on Thiessen polygons is calculated,the map of population density of each village is gained by using ordinary Kriging with the exponential model.The results showed that the higher population density areas distribute along the southwest to northeastward,presented the phenomenon of massive aggregation and banding extend.The buffer zones are built at the radius of 50 m×i（i=1,2,3…20）,calculated population density of every buffer zone by the formula of Popden=y/s,the road and population density map was obtained by using the method of GCAWI,the results indicated that most of the population are gathered at the radius of 0～300 m buffer zones.As a result,GCAWI reflected the real distribution of population.
出处
《云南地理环境研究》
2011年第2期34-40,共7页
Yunnan Geographic Environment Research
基金
教育部人文社会科学研究项目"社会统计数据空间化及其应用研究"基金资助(09YJC840049)
