Research On The Big Data Measurement Of Urban Street Walkability Based On Humanscale

With the continuous development of China’s urbanization process,residents’ way of life and work has undergone great changes,so has the position of the street in urban area.With the rapid expansion of urban space and the development of economy,urban streets which play an significant role in the field of urban public space has encountered many difficulties,such as: the declines of street space quality and vitality.How to improve the walkability of city street from the perspective of people-oriented,in order to guide the sustainable development of urban ecology.The emergence of emerging technologies provides us with a new perspective to observe the street problem,and the excavation of massive data provides us with a new opportunity to solve large scale complex problems.Under this circumstance,the paper chooses urban street walkability as the research object,and studies the walkability characteristics and internal mechanism of Nanjing Street from two aspects: theoretical research and empirical measurement.In the theoretical research,the paper summarize the theory of urban street walkability and the definition of urban street pedestrian and the index elements.In the empirical research,this paper establishes the basic database of the quantitative study of Urban Street’s walkability by using three-dimensional spatial data,POI big data and Baidu Street View big data,and uses the index system of pedestrian measure of city street to quantitatively evaluate the pedestrian performance of the street in Nanjing central district,Based on the analysis of the basic characteristics of pedestrian walking in Nanjing central city,this paper analyzes the influence of pedestrian in urban street by correlation analysis and cluster analysis.Finally,the paper constructs the ideal model of street walking model and selects 3 typical streets in Nanjing central city to carry on the verification analysis and the pertinence diagnosis.In this paper,we divide the measure index of street walkability into four basic fields of patency,convenience,comfort and safety,and with the alternation of practice and theory,the indexes of four fields are mixed with each other.There is a radial structure characteristic of the fan ring layer in the unobstructed level of the pedestrian in the downtown area of Nanjing.At the convenience level,there exist the structural characteristics of the central multi-core continuous and the peripheral point dispersion;the structural features of the low outer and high hollow in the natural environment and the inner core of the artificial environment structure and the external finger extension coexist at the comfort level.The structural characteristics of internal high value oscillation and peripheral annular fragmentation are found at the security level.The influence of material space on the pedestrian nature of urban street mainly originates from the layout of central system,network system layout and landscape skeleton layout three aspects,including: Pedestrian network patency,pedestrian body patency,pedestrian traffic safety is mainly from the street network itself attribute factors and landscape factors,the formation of commuter-oriented street The natural environment comfort of the street is influenced by the negative influence of the central system layout and the landscape factor layout,and the sceneryoriented street is formed;Street artificial Environment comfort,street service coverage,street service richness and pedestrian safety are mainly influenced by the layout of central system.To form a life-oriented street.Finally,the paper divides the streets of Nanjing into five types,according to the difference of the walking mode and the evaluation result of the measure system,we use the diagnosis strategy of quality,characteristic,promotion and rectification.Specifically,the full text structure is as follows:The first chapter is the introduction,mainly elaborated this article research background,the research goal and the research significance,has analyzed the street pedestrian measure three kinds of main methods superiority and disadvantage,introduced this article research object,the research goal and the research method,simultaneously combed the full text research frame and the technical route.Chapter Two is the theoretical research part of street walkability,the development vein of street theory is combed,the street related theory of different period,the role orientation and demand of walk are summarized.By means of pedigree research,the measure index of street pedestrian is combed,and the four dimensions of pedestrian measure index in this paper are determined.The third chapter is the system construction part of urban street pedestrian measure,based on the theoretical study,the paper analyzes the pedestrian performance of street in four dimensions,such as patency,convenience,comfort and safety,and determines the evaluation index of pedestrian measure,and introduces the data source and processing method of multi-source large data in detail.The fourth chapter is the empirical research part of the core of this paper,mainly carries on the pedestrian measure to the Nanjing center city street,analyzes the different index appraisal result,and summarizes its street pedestrian’s spatial distribution characteristic and the numerical fluctuation characteristic.The fifth chapter,through correlation analysis and cluster analysis,to excavate the influence mechanism of urban street pedestrian,and to construct the ideal model of urban street pedestrian model according to the influence between external factors and index,and finally select three typical streets to analyze the pedestrian mode and propose the corresponding pedestrian diagnosis strategy.The sixth chapter is the summary of the main conclusions,innovation points and deficiencies of this paper.On the whole,based on the theory of the measure of street pedestrian index,using the big data including spatial form,POI,and Baidu Street View,this paper establishes a quantitative evaluation method of street pedestrian in city scale from four dimensions,sums up the spatial distribution characteristics of pedestrian in urban street and analyzes its influence mechanism quantitatively,Constructing the ideal model and diagnosis method of urban street pedestrian model has a certain positive effect on the promotion of street comprehensive environment in urban planning practice.