基于POI数据的焦作市老旧街区公共服务设施空间分布研究

Research on the Spatial Distribution of Public Service Facilities in Old Neighborhoods of Jiaozuo City Based on POI Data

基于焦作老旧街区七类公共服务设施的POI数据,文章运用最近邻指数(Nearest Neighbor Index,NNI)、标准差椭圆(Standard Deviational Ellipse,SDE)和核密度分析(Kernel Density Estimation,KDE)等研究方法,分析了焦作老旧街区公共服务设施的空间分布特征,得出以下主要结论:(1)七类公共服务设施均有在老旧街区中心区域存在高度集聚的特征;(2)老旧街区的公共服务设施整体呈现为“东北多,西南少”的空间格局;(3)各类公共服务设施布局方向均为西南-东北向;(4)老旧街区公共服务设施分布均存在明显的中心-边缘结构特征。

Based on POI data of seven types of public service facilities in old neighborhoods of Jiaozuo,research methods such as nearest neighbor index,standard deviation ellipse,and kernel density analysis were used to analyze the spatial distribution characteristics of public service facilities in old neighborhoods of Jiaozuo.The results show that:(1)The seven types of public service facilities are highly concentrated in the central area of the old block;(2)The public service facilities in the old neighborhoods as a whole present a spatial pattern of"more in the northeast and less in the southwest";(3)The layout direction of all kinds of public service facilities is southwest-northeast;(4)The distribution of public service facilities in old blocks has obvious center-periphery structure characteristics.