基于POI数据的城市餐饮业空间分布特征及便利性研究——以江苏省南京市为例

Spatial Distribution Characteristics and Convenience of Urban Catering Industry Based on POI Data:A Case Study of Nanjing,Jiangsu Province

利用近邻表、核密度、GIS统计方法探究南京市主城区餐饮业空间结构特征,借助缓冲区分析、网络分析得到就餐便利性地图,结合人口分布剖析人均就餐便利性。结果表明:①整体层面,南京市主城区餐饮网点平均间隔距离较短,空间格局呈现一个“大核心”和多个“小核心”,街道尺度餐饮点密度由中心向外围递减。②各餐饮类别层面,小吃快餐类平均间隔最短,国际餐饮类平均间隔最长;国际餐饮呈单核集聚分布,其余3类均呈多核分布;集聚范围、核密度极值、街道尺度分布密度从大至小均为小吃快餐、中式餐饮、甜点饮品、国际餐饮。③南京市主城区就餐便利性整体较高,其中中式餐饮类就餐最便利,就餐便利性与人口分布匹配度较高,人均就餐便利性与总体就餐便利性呈相反格局且老城区人均就餐便利性较低。

This paper adopted Python language to capture the catering POI in the main urban area of Nanjing from the Amap open platform.And the spatial structure characteristics of the catering industry in the main urban area of Nanjing were explored based on the nearest neighbor table analysis,kernel density estimation method and GIS statistical analysis.With the help of buffer analysis and network analysis,the dining convenience map was drawn,and the per capita dining convenience was analyzed in combination with the population distribution.It is found as follows.①The average interval distance of catering outlets in the main urban area of Nanjing is short,spatial agglomeration presents a large core and multiple small cores,and subdistrict-scale catering density decreases from the center to the periphery.②The average interval distance of snack fast food outlets is the shortest,and that of international catering outlets is the longest.International catering outlets show a single-core agglomeration distribution,outlets of snack fast food,Chinese food and dessert drinks show multi-core distribution.The agglomeration range,the extreme value of kernel density and the distribution density of subdistrict scale from large to small are snack fast food,Chinese food,dessert drinks and international catering.③The overall convenience of dining in the main urban area of Nanjing is high,among which Chinese food is the most convenient.The matching degree of dining convenience and population distribution is high,the per capita dining convenience is opposite to the overall dining convenience,and the value of per capita dining convenience in the old urban area is low.