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Joe Grengs: Policy & planning for transportation equity

What is Urban? Comparing a Satellite View with Demographic and Health Surveys

Archived Abstract of Former PSC Researcher

Dorelien, Audrey, Deborah Balk, and Megan Todd. 2013. "What is Urban? Comparing a Satellite View with Demographic and Health Surveys." Population and Development Review, 39(3): 413-440.

Appraisal of urbanization trends is limited by the lack of a globally consistent definition of what is meant by urban. This article seeks to identify and explain differences in the definition of "urbanness" as used in two largely distinct research communities. We compare the Global Rural–Urban Mapping Project (GRUMP), which defines urban areas based primarily on satellite imagery of nighttime lights, to the urban classification found in Demographic and Health Surveys (DHS), which relies on the urban definitions of individual countries' national statistical offices. We analyze the distribution of DHS clusters falling within and outside of GRUMP urban extents and examine select characteristics of these clusters (notably, household electrification). Our results show a high degree of agreement between the two data sources on what areas are considered urban; furthermore, when used together, GRUMP and DHS data reveal urban characteristics that are not evident when one data source is used independently. GRUMP urban extents are overwhelmingly medium and large highly electrified localities. DHS clusters that are classified as non-urban but that fall within GRUMP extents tend to be peri-urban areas.

DOI:10.1111/j.1728-4457.2013.00610.x (Full Text)

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