Aspects influencing the selection of representative urbanization measures to quantify urban-rural gradients

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dc.contributor.author Cilliers, Sarel Stephanus
dc.contributor.author Du Toit, Marié Joey
dc.date.accessioned 2012-11-05T05:55:40Z
dc.date.available 2012-11-05T05:55:40Z
dc.date.issued 2011
dc.identifier.citation Du Toit, M.J.& Cilliers, S.S. 2011. Aspects influencing the selection of representative urbanization measures to quantify urban-rural gradients. Landscape ecology, 26(2):169-181. [http://www.springerlink.com/content/103025/?p=d3084427244240f4abfe2354cf56360f&pi=1447&MUD=MP] en_US
dc.identifier.issn 0921-2973
dc.identifier.issn 1572-9761 (Online)
dc.identifier.uri http://hdl.handle.net/10394/7714
dc.description.abstract The quantification of urban–rural gradients using urbanization measures has become standard practice in many urban ecological studies. Nonetheless, the choice of urbanization measures for a specific urban gradient still remains problematic. Increasing numbers of papers stress the importance of comparative urban ecological research, in an attempt to contribute to an understanding of the ecology ‘of’ cities. This implies that research in diverse urban areas globally should be comparable. This study follows an approach to quantify the urban–rural gradient in Klerksdorp previously followed in Melbourne, Australia with the goal to help elucidate the viability of creating a standard set of urbanization measures that is useful across continents. Satellite imagery and spatial analysis were used to calculate the values of 12 urbanization measures across a 900 km2 landscape grid. Principal components analysis is commonly used to identify smaller subsets of measures to quantify urban–rural gradients. The results of this study indicate that factor analysis is more suitable than principal components analysis and ideal in identifying these independent measures of urbanization. The factor analysis revealed that landscape structure and demographic attributes are both essential characteristics of a city that needs to be accounted for in the choice of urbanization measures. Additionally, we identified seven aspects influencing the direct comparison of cities, namely: scale of analysis, spatial resolution, classification typology, accuracy of input data, specific measure equations, the type of statistical analysis and the habitat context. These aspects must be taken into consideration and resolved before effective comparative gradient research between cities can be achieved. en_US
dc.description.uri http://dx.doi.org/10.1007/s10980-010-9560-4
dc.language.iso en en_US
dc.publisher Springer Science en_US
dc.subject Urbanization measures en_US
dc.subject urban-rural gradient en_US
dc.subject factor analysis en_US
dc.subject principal components analysis en_US
dc.subject landscape metrics en_US
dc.subject demographic variables en_US
dc.subject physical variables en_US
dc.subject urban ecology en_US
dc.subject comparative research en_US
dc.title Aspects influencing the selection of representative urbanization measures to quantify urban-rural gradients en_US
dc.type Article en_US

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