Analysis Of Multicenter Spatial Structure In Qingdao East Coast City Zone Based On Multi-source Data

At the present stage,with the continuous progress of urbanization,the urban development is changing from the development mode of "incremental expansion" to the refined spatial "inventory renewal".In the process of space " inventory renewal ",the traditional single-center development mode hinders the development of large cities due to the problems of urban congestion and inefficient operation caused by the excessive concentration of various functional elements.The multi-center spatial model which is conducive to the efficient operation of the city gradually emerges in the process of urban expansion,and quickly becomes a research hotspot.With the emergence of POI data and micro-blog check-in data,the problems of difficult data acquisition and high cost in traditional urban research have been solved to a certain extent.The application of big data in urban spatial research has rapidly become a hot topic for domestic scholars.At present,Qingdao is in a critical period of transformation to a multi-center spatial structure,and the problems that follow are becoming increasingly prominent.This paper summarizes the theory and practice results of multi-center at home and abroad,and uses the spatial data analysis tool of ArcGIS software.Using POI data and Baidu Thermal Map,the spatial distribution characteristics of functional centers and the clustering characteristics of urban population in Qingdao east coast city zone were studied.The results show that Qingdao east coast city zone is in the primary stage of multi-center formation,which is manifested by the multi-center spatial structure of the strong main center,the weak sub-center and the multi-level,forming six major city centers.On this basis,the dynamic mechanism of the formation of the multi-center pattern in Qingdao east coast city zone is analyzed,and some existing problems are summarized,such as the Expansion of Functional Space does not match the Planning Expectations,aggregation imbalance in functional space,uneven traffic links between centres.And put forward a series of solutions,such as establishment of hierarchical and orderly multi-center spatial structure system,Strengthen the Diversity and Complexity of Urban Center Functions,improving the guiding and supporting role of transportation to various functional centers...