期刊
PLOS ONE
卷 13, 期 12, 页码 -出版社
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0208487
关键词
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资金
- US National Science Foundation [1416860]
- Population Council
- National Center for Atmospheric Research (NCAR)
- University of Colorado at Boulder
- NSF [CHE-1314040]
- Carnegie Corporation of New York [G-F-16-53680]
- Eunice Kennedy Shriver National Institute of Child Health and Human Development [P2CHD066613]
- Direct For Social, Behav & Economic Scie
- SBE Off Of Multidisciplinary Activities [1416860] Funding Source: National Science Foundation
Most of future population growth will take place in the world's cities and towns. Yet, there is no well-established, consistent way to measure either urban land or people. Even census-based urban concepts and measures undergo frequent revision, impeding rigorous comparisons over time and place. This study presents a new spatial approach to derive consistent urban proxies for the US. It compares census-designated urban blocks with proxies for land-based classifications of built-up areas derived from time-series of the Global Human Settlement Layer (GHSL) for 1990-2010. This comparison provides a new way to understand urban structure and its changes: Most land that is more than 50% built-up, and people living on such land, are officially classified as urban. However, 30% of the census-designated urban population and land is located in less built-up areas that can be characterized as mainly suburban and peri-urban in nature. Such insights are important starting points for a new urban research program: creating globally and temporally consistent proxies to guide modelling of urban change.
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