武汉市多尺度道路网络中心性与社会经济活动点空间分布关系分析

STUDY ON THE MULTI-SCALE RELATIONSHIP BETWEEN ROAD NETWORK CENTERALITY AND SOCIAL ECONOMIC ACTIVITIES DISTRIBUTION IN WUHAN

本文运用城市网络分析工具测度武汉市主城区多尺度道路网络中心性并分析其与各类社会经济活动空间分布的关系。研究结果表明:(1)随搜索半径增大,邻近中心性由多个高值区到趋于城市质心并呈圈层结构,中介中心性由片状到点轴式分布,直线中心性空间格局基本不变。(2)道路网络中心性随尺度变化与社会经济活动空间分布呈现不同的相关性,且变化各异。社会经济活动空间分布与全域邻近道路网络中心性和搜索半径为3000 m的直线中心性相关性最强,与中介中心性基本不相关。(3)道路网络中心性与各类社会经济活动空间分布关系略有差别,与医疗教育等公共服务业相关性最强,零售业其次,休闲娱乐业最弱。(4)道路网络中心性与社会经济活动空间分布存在非协调区域,局域路网识别出来的中心性区域功能缺失。

Measuring the multi-scale road network centrality can help to understand the hierarchical structure of global and local road network and the spatial heterogeneity according to the changed search radius. The analysis of the correlation between multi-scale road network centrality and the spatial distribution of social economic activities is necessary to grasp the influence of the urban global and local road network on the social economic activities and the coordination between them. In this paper, urban network analysis tool is used to measure the multi-scale road network centrality, which includes closeness centrality, betweenness centrality and straightness centrality, in the main city of Wuhan, and the relationship between it and the spatial distribution of various social economic activities is analyzed. The research results show that： 1） the spatial pattern of centrality indices varies in different scales. 2） The correlation between road network centrality indices and various social economic activities distribution varies with the scale but positively. 3） The multiscale relationship between road network centrality and social economic activities distribution differs. 4） There is an uncoordinated region between the road network centrality and the social economic activities distribution in Wuhan city.