一种改进的基于空间句法的地铁可达性演变研究——以广佛地铁为例

An Improved Method of Analyzing the Accessibility of Guangfo Subway Evolution Based on Spatial Syntax

空间句法在地铁可达性研究中具有独特的优越性,但传统的基于空间句法的可达性研究只考虑换乘的次数,而忽略各线路站点分布的影响,不能精细地反映各个站点之间的可达性差异。在传统方法的基础上提出一种改进的基于空间句法的地铁可达性研究方法,该方法通过使用改进的凸状分割方法,以每个地铁站点以及各个站点之间的线路作为研究的基本单元,选择GIS中的网络分析方法对基础数据进行处理。最后,通过对广佛地铁可达性进行实证验算,揭示了不同时期地铁站点可达性分布和演变情况,结果表明该研究方法取得了令人满意的结果,展现了该方法在地铁网络可达性分布的空间形态特征、演变过程及预测中的有效性,可为交通规划、地铁周边商业布局及沿线房地产开发等提供参考依据。

Space syntax has unique advantages in subway accessibility research. Traditional accessibility based on Space Syntax only considers transfer times, while ignoring the impact of the site distribution of each line and cannot finely reflect the differences of accessibility between sites. Based on traditional researches, it puts forward an improved Research method for accessibility based on space syntax. In this method, this paper takes all the stations and the lines between them as the basic units of study by improved Convex segmentation, and processes the basic data with GIS network analysis. Finally, it gets reasonable results through the Guangfo subway empirical calculation, which reveals the distribution and evolution of the subway station＇s accessibility at different periods of time and demonstrates the effectiveness of this method for spatial morphology, evolution and prediction of subway network accessibility distribution, providing a reference for the placement of surrounding retail and underground commercial space and real estate development along the line and so on.