Research On Evaluation And Influence Mechanism Of Urban Residential Block Vitality Based On Multi-source Data

In recent years,the development of urbanization in China has changed from "quantity promotion" to "quality pursuit".To improve the quality of human settlements and stimulate urban vitality has become an important part in urban development.During this period,with the development of social and economic level,the demand of residents for the quality of living environment is increasing day by day.The existing research on the basic theory of building the vitality of residential blocks has been discussed for a long time.Scholars in various fields have also carried out the excavation and analysis of the key elements of the vitality of urban residential blocks from different aspects.The research on the internal influence mechanism of the vitality of residential blocks will further enrich the relevant theories,and play a certain reference role in the construction of space environment of similar blocks.By fully combing the existing research and analyzing the connotation of the vitality of residential blocks,this paper constructs a quantitative analysis framework of the vitality of residential blocks from two aspects: the external characterization of vitality and the components of vitality.Among them,the external representation of vitality is the behavior characteristics of urban residents,and can be divided into two aspects: the intensity characteristics of spatial dimension and the fluctuation characteristics of time dimension;the constituent elements of vitality are the material composition and environmental characteristics of blocks,including location quality,functional diversity,intensive development,transportation convenience and environmental friendliness.Based on the above analysis framework,this paper comprehensively uses Tencent location data,Gaode POI data,Gaode navigation data and OSM map data,supplemented by government open data and questionnaire data,selects Tianjin Zhongxin eco city as the research object,evaluates the external characteristics and composition factors of its vitality quantitatively,and on this basis,makes correlation analysis on the coupling relationship between the two Analysis.The results show that the density of road network and the accessibility of commercial facilities are the main factors to promote the vitality of eco city blocks,and the accessibility of park green space and space hydrophilicity are the main factors to inhibit the vitality of eco city blocks.Therefore,based on the common elements that affect the vitality of residential blocks,this paper puts forward four strategies to enhance the vitality of residential blocks: optimizing the layout of commercial facilities,building a dense and well-defined road network system,improving the quality of public transport services,strengthening the diversity of landscape spatial functions,and strengthening the project planning of night landscape and activities;and according to the different elements,it aims to classify the blocks In order to provide some reference for the construction of the vitality of residential blocks,this paper puts forward the promotion strategies of differentiation.