Research On Spatial Vitality Evaluation Of Ancient City Streets Based On Multi-source Data Fusion

The rapid development of the city makes the city scale expand day by day and the urbanization develops rapidly.The large-scale construction of a city affects the spatial vitality of the city.As the main urban space for people's activities,the urban street is worth further exploring.In the study of existing theories about the construction of new street space increasingly rich,and less attention on perfect for the ancient city,the ancient city as the preservation and dissemination of key areas of the traditional culture of our country,it is particularly important to the vitality of city streets,and is still in the theoretical research and practice have a larger space.Compared with the traditional urban research,with the development of science and technology,more types and more data from more sources can be applied in the field of urban space research.As the use of multi-source data in urban research is still in the development stage,the selection and use of data about the vitality of ancient city streets still need to be further explored.This paper takes the ancient city as the entry point,takes the ancient city street space as the research object,uses the multi-source data,evaluates the relationship between the ancient city street space vitality and street space quality,and puts forward the strategy to improve the ancient city street space vitality.Firstly,according to the research purpose and relevant theories,defines the concept of terms in this paper.Combining with the characteristics of ancient city and the evaluation system of street space established in the existing research,the evaluation index is selected from the three dimensions of the environmental representation,constituent elements and external representation of street space to construct the evaluation system of street space in ancient city.Taking the ancient city of quanzhou as an example,a street space evaluation system suitable for the ancient city of quanzhou is constructed.The street vitality and quality of the ancient city of quanzhou were quantified by using the open map data,street scene picture data,interest point data,and micro-blog positioning data of the ancient city of quanzhou.Then,establish a multiple linear regression model,and according to the standardized coefficient of each index in the model,sort out the importance of the indexes.The last,summarizes the influence factors of street quality on street vitality in quanzhou ancient city.The research results can provide research methods and judgment basis for the improvement and reconstruction of the spatial vitality of ancient city streets in the future.