Emerging urban centrality: An entropy-based indicator of polycentric development and economic growth |
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| Affiliation: | 1. Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong;2. Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Hong Kong;1. School of Geography, Faculty of Geographical Science, Beijing Normal University, No. 19, XinJieKouWai St., HaiDian District, Beijing 100875, China;2. Institute of Geographic Sciences and Nature Resources Research, Key Laboratory of Regional Sustainable Development Modeling, Chinese Academy of Sciences,11A Datun Road, Chaoyang District, Beijing 100101, China;3. University of Chinese Academy of Sciences, Yuquan Road 49, Beijing 100049, China;4. Urban-Rural Planning Administration Center, Ministry of Housing and Urban-Rural Development of China, No.9 San Li He Road, Beijing 100835, China;5. Centre for Urban Planning and Transport Studies, School of Urban and Environmental Sciences, Peking University, Yiheyuan Road 5, Beijing 100871, China;1. German Aerospace Center (DLR), German Remote Sensing Data Center (DFD), Oberpfaffenhofen, 82234 Wessling, Germany;2. Research Institute for Regional and Urban Development (ILS), Brüderweg 22-24, 44135 Dortmund, Germany |
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| Abstract: | This study moves in the debate on polycentric development in Europe proposing an entropy-based indicator of urban centrality based on local-scale diversity in soil sealing levels. This indicator reflects a progressive transition from a mono-centric and hyper-compact morphology towards polycentric agglomerations, with formation (or consolidation) of sub-centres structurally and functionally distinct from central cities. The proposed approach was tested in three metropolitan regions (Barcelona, Rome and Athens) with the aim to provide a comparative analysis of recent urbanization patterns in European countries affected by rapid processes of urban spillover. The local socioeconomic structure underlying urban expansion was investigated using descriptive, correlation and multivariate analysis of 52 contextual indicators. Results of this study shed light on long-term urbanization patterns in the examined cities, providing evidence of a progressive settlement scattering in Rome and Athens. Early signals of polycentrism were observed in Barcelona. Diversification in the level of soil sealing decreased with the distance from central cities. The article finally debates on the use of composite indexes of diversification in the level of soil sealing when assessing polycentric urban development. |
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| Keywords: | Urban growth Morphology Metropolitan hierarchy Socioeconomic context Mediterranean Europe |
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