A longitudinal study of changes in urban sprawl between 2000 and 2010 in the United States

Using multi-source geospatial big data to identify the structure of polycentric cities

A shift from monocentric cities to increasingly polycentric urban regions has been widely recognised in recent research literature. Although polycentricity in general refers to the existence of sev...

Functional Polycentricity: Examining Metropolitan Spatial Structure through the Connectivity of Urban Sub-centres

Contemporary urban systems in OECD countries are structured around functional regions, which often overcome established city-boundaries. Reading space in terms of functional regions allows assessing changes in urban hierarchies and spatial structures, including the polycentricity of urban systems at national, regional and metropolitan scales. By using a harmonized definition of functional urban areas in OECD countries, this paper first provides a sound definition of polycentricity at each spatial scale, highlighting for each of them the different links with policy. Second, it provides measures of polycentricity and explores the economic implications of different spatial structures. Results show that relatively more monocentric regions have higher GDP per capita than their more polycentric counterparts. At the country level, on the other hand, polycentricity is associated with higher GDP per capita.

Assessing Polycentric Urban Systems in the OECD: Country, Regional and Metropolitan Perspectives

Across the nation, the debate over metropolitan sprawl and its impacts continues decade after decade. To elevate the debate, a decade ago, researchers developed compactness/sprawl indices for metro...

Measuring Sprawl and Its Impacts: An Update

New models of urban structures have emerged based on the assumption that metropolitan areas are increasingly decentralized, central business districts becoming less important in terms of employment and new subcentres emerging at the edge of cities. This article presents a method of identifying subcentres in suburban areas. This method is then applied to the question of whether subcentres exist on the periphery of medium-sized European cities and, if so, what kind of activities are located there. This is done by empirically describing and explaining the spatial structure of four urban regions in Belgium. Several spatial analysis techniques are used at different levels of data aggregation. Local autocorrelation is particularly appropriate for detecting clusters of employment, while shift-and-share analyses are useful for looking at the developmental trends. We show that, despite an overall trend to decentralization, polycentrism is still weak.

Measuring urban polycentrism: a European case study and its implications

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Measuring urban polycentrism: a European case study and its implications