Research On Spatial Vitality Measurement And Influence Mechanism Of Changsha Subway Station Based On Multi-Source Data

As China’s economic development has entered a new normal,residents’ living standards have continued to improve,and urban development has also entered a new stage of quality improvement.Building a vibrant city has become the common goal of all cities.As an important public space node where people gather in a city,the subway station area is closely related to people’s daily travel and the development of various activities.It is an inevitable requirement to process to the sustainable development of the city to build a great,diverse and vibrant station area.In recent years,urban construction and subway construction in Changsha have developed rapidly,and Changsha subway is in the stage of continuous adaptation and integration with urban space.This paper takes Changsha Metro Line 1～5 as an example,and combines previous theoretical and empirical research on the vitality of subway station space and urban space.Based on the data,a theoretical framework for the measurement of station space vitality and the internal impact mechanism of station space vitality and built environment is constructed.At the level of spatial vitality measurement,with the assistance of Baidu heat map data,the spatial distribution characteristics and temporal fluctuation characteristics of crowd activities in the station area are analyzed,and the spatial vitality characteristics of the station area of different functional types are compared and analyzed.At the level of the influence mechanism of station space space vitality,with the help of multi-source spatial data,the built environment quantitative index system is constructed from 4 dimensions and 15 index factors of land parcel capacity,traffic accessibility,service facilities,and environmental quality.The correlation analysis explores the overall impact mechanism of the spatial vitality of the subway station area and the differential impact mechanism of different functional types of station areas,and selects specific cases of each functional type of station area to re-discuss the classification characteristics and impact mechanism of the station area.Finally,the station area space is proposed.Vitality enhancement strategies and suggestions.On the basis of theoretical research and empirical analysis,the conclusion of this paper is drawn: the spatial vitality of Changsha subway station area has the characteristics of temporal and spatial differentiation,the siphon effect in the city center is obvious,the high dynamic station area is less,and the traffic dividend of subway construction is not yet complete.It is reflected;the crowd gathering ability and time-varying characteristics of different functional types of station areas in Changsha are different,and the dislocation arrangement of single-function prominent station area and mixed type station area is conducive to the uniform distribution of crowd gathering in time and space;The characteristics of the built environment such as service facilities have an important impact on the spatial vitality of the station area,and multi-factor superposition construction can play a more significant effect;the impact mechanism of the spatial vitality of the station area of different functional types is not the same,and it should be combined with the resource endowment of the station area and functional positioning.Vitality-enhancing strategies are adopted.