Abstract
Detail observation of human locations became available recently by the development of information technology such as mobile phones with GPS (Global Positioning System). We analyzed temporal changes of global human flow patterns in urban regions based on mobile phones’ GPS data in 9 large cities in Japan. By applying a new concept of drainage basins in analogous to river flow patterns, we discovered several universal scaling relations. These include, the number of moving people in a drainage basin of diameter L is proportional to L^3 in the morning rush hour, which is surprisingly different from reasonable intuition of proportionality to the 2 dimensional area, L^2. We show that this unexpected 3 dimensional feature is related to the strong attraction of the city center to become a 3 dimensional structure due skyscrapers.
Highlights
Detail observation of human locations became available recently by the development of information technology such as mobile phones with GPS (Global Positioning System)
We introduce and develop a framework to perform a mesoscopic analysis of collective human mobility, within urban areas
In our framework we regard human flow like water flow and observe temporal changes of drainage basin structures within and around large cities applying the concept of power laws
Summary
Detail observation of human locations became available recently by the development of information technology such as mobile phones with GPS (Global Positioning System). We analyzed temporal changes of global human flow patterns in urban regions based on mobile phones’ GPS data in 9 large cities in Japan. Mobile phones with GPS provide detailed information of locations of enormous number of people, simultaneously By analyzing such detailed observational data, study of human mobility became much more precise and intensive. We analyze GPS location data of mobile phones with the information of velocity and location, and observe the temporal evolution of collective flow patterns of human mobility within big cities. In our framework we regard human flow like water flow and observe temporal changes of drainage basin structures within and around large cities applying the concept of power laws
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