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Abstract In the process of urbanization, a phenomenon called “urban sprawl” usually occurs. In the aspect of measuring and comparing urban sprawls among metropolitan areas, consistent and easy measuring or calculations are lacking although they are urgently required. Therefore, this study aims to introduce a set of metrics of urban sprawl, which include intensity, coefficient of variation, poly-centers and centrality extracted from the night-time light (NTL)data. Moreover, 50 metropolitan areas in China were used to test the feasibility of these metrics in representing urban sprawl and clarify the situation in China. The results show that these metrics are independent of each other, and can represent the urban sprawl accurately from various perspectives. The methods proposed in this paper would provide the useful tools for government and urban planners to understand urban sprawl so as to make appropriate policy and plan to achieve sustainable development of the metropolitan areas.
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| Keywords
night-time light(NTL)
urban sprawl
metropolitan area
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Issue Date: 30 May 2018
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2018,
Vol. 30
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