Exploring The Urban Dynamic Space And Its Characteristics Of Zhuhai City Using Taxi Data

The exploration of urban spatial structure is one of the core contents of urban planning and urban geography in the past.With the rapid development of the times,the urban operation system has become complicated.People originally understood that the spatial structure of an urban area tends to pass static elements such as land use,ecology and transportation.However,with the ex pansion of urban scale and the increase of population mobility,Static elements of the study has been unable to fully understand the city complex system,but the need to combine static and dynamic way.In recent years,the massive,multi-sourced and space-time big data that emerged in the development of big data can not only foster further refinement of city-related research,but also tap real-time issues and other information arising from the implementation of urban planning,Provide important support for adjusting the existing plan.This paper,from the perspective of spatial interaction,abstracts the complex trajectory formed by the interaction between people in the city space(in this paper,the starting and ending point of taxi)as a complex network,and makes use of Infomap algorithm in community discovery algorithm to analyze the dynamics of Zhuhai city Space identification and characteristics of research.In this paper,Zhuhai City,September 19,2015 to September 25,2015 seven consecutive taxi data to identify the dynamic urban space,remove the data error points and extract the taxi off the passenger data points,the data classified by attribute and discrete To a well-partitioned grid,create Object Desktop(OD)matrices from the trajectories of taxicabs.Use OD matrix to construct interactive network,random walk,community identification and geographical mapping of interactive network.Through community discovery,the different community units identified in different periods can be used to presen t the spatial interaction process of mass movement of people in the physical space and the potential spatial distribution of the different periods reflected by the community.And divided into the city and the central city of the city dynamic space characte ristics described in detail,combined with the status of land use data such as characteristics of the analysis.The results show that there is a great difference in the spatial interaction between eastern and western plates in Zhuhai City,and the spatial interaction in the eastern plate is stronger than that in the western plate.The spatial interaction at the city level mainly concentrates on the central urban area,Hengqin New District and the Tangjiawan and Jinding Area.The dynamic spatial distribution of the rest and working days is different,and the scope of the rest day-space interaction is shorter than the working day.The spatial distribution of urban dynamic at different periods of the working day and the rest day at the central urban area is different,and the dynamic spatial distribution at different periods of the working day and the rest day are also different.The change of urban dynamic space on working days was affected by the peak of morning and evening,the opening hours of ports,lunch b reak and the time of school-leaving for primary and middle school students.The dynamic spatial distribution of rest day in different periods appeared in the vicinity of all commercial centers in the downtown area.