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Multiscale identifi...
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Wei, LaiWuhan University
(author)
Multiscale identification of urban functional polycentricity for planning implications : An integrated approach using geo-big transport data and complex network modeling
- Article/chapterEnglish2020
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LIBRIS-ID:oai:lup.lub.lu.se:5b5554b8-1409-480a-a39b-9467b8be3e4b
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https://lup.lub.lu.se/record/5b5554b8-1409-480a-a39b-9467b8be3e4bURI
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https://doi.org/10.1016/j.habitatint.2020.102134DOI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
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Polycentrism has gradually become a newly emergent dimension of global urbanization. Many countries worldwide have tailored plans suited to functional polycentricity, in light of the prevalent “ghost cities” or “empty towns” as lessons from the morphologically polycentric development practices. However, the subject of defining and measuring functional polycentricity is still in an initial development phase, both in theory and in methodology. This paper first establishes a general theoretical framework for understanding functional polycentricity from the lens of interactive human mobility among spatial units. Then, a new approach is proposed to identify and measure urban functional polycentricity from a multiscale perspective and further applied to the case of Shanghai, China. More specifically, the pick-up and drop-off points from taxi GPS data are used to examine the linkages among different urban units across various scales (e.g., census tract, 3000-m grid, 5000-m grid, and community). Complex network modeling, together with the sensitivity analysis, is further employed to identify the centers according to the spatial importance of each unit. The results show that (1) the approach proposed can effectively identify functional centers within urban setting; (2) an obvious polycentric structure exists in Shanghai and is sensitive to scale effects; (3) the estimates are more accurate and precise with the shrink of analysis unit size from community level to census tract level; and (4) under the same spatial scale, the grid-based analysis produces a more elaborated polycentric pattern compared with the traditional administration-based analysis. Finally, scale-dependent differences between morphological and functional polycentricity are distinguished for providing implications for urban planning. Our study is believed to renew the knowledge of polycentricity conceptualization.
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Luo, YunWuhan University
(author)
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Wang, MiaoLund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science(Swepub:lu)nate-miw
(author)
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Cai, YuyangChina University of Geosciences
(author)
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Su, ShiliangWuhan University
(author)
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Li, BozhaoWuhan University
(author)
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Ji, HangyuWuhan University
(author)
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Wuhan UniversityInstitutionen för naturgeografi och ekosystemvetenskap
(creator_code:org_t)
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In:Habitat International: Elsevier BV970197-3975
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