基于POI数据的城市活动设施空间格局研究——以长沙市为例

Study on the Spatial Pattern of Urban Activity Facilities Based on POI Data:taking Changsha City as an Example

城市活动设施的空间格局研究可为完善城市布局、优化城市空间结构提供理论和实际参考。基于POI数据,运用核密度估计法、平均最近邻指数法、标准差椭圆、叠加分析等方法,综合探究长沙市活动设施空间格局。结果表明,(1)长沙市主城区活动设施中心呈“一主多副”特征,“主中心”边界范围广,集聚优势显著,功能设施混合度高。(2)长沙市居民的活动区域,东城区比西城区聚集程度更高。(3)城市居民活动空间沿“东北-西南”轴方向发展,与流经长沙市的湘江段走向相同。依据研究结论,提出城市活动设施空间结构优化建议。

The study of the spatial patterm of urban activity facilities can provide theoretical and practical references for improving the urban layout and optimizing the urban spatial structure.Based on the POI data,the spatial pattern of activity facilities in Changsha City is investigated by using the kermel density estimation method,the average nearest neighbor index method,the standard deviation ellipse,and the superposition analysis,etc.The results show that,(1)the center of activity facilities in Changsha main urban area is characterized by"one main center and many sub-centers",with a wide range of boundaries of the"main center",significant agglomeration advantages,and a high degree of mixing of functional facilities.(2)The activity area of Changsha residents has a higher degree of agglomeration in Dongcheng District than in Xicheng District.(3)The activity space of urban residents develops along the"Northeast-Southwest"axis,which is the same as the direction of the Xiangjiang River flowing through Changsha City.Based on the conclusions of the study,it is proposed to optimize the spatial structure of urban activity facilities.