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The Spatio-temporal Analysis of Urbanization in Liaoning, China, Using DMSP OLS Nighttime Light Imagery

  • Journal of the Korean Cartographic Association
  • Abbr : JKCA
  • 2017, 17(3), pp.85-96
  • Publisher : The Korean Cartographic Association
  • Research Area : Social Science > Geography > Geography in general > Cartography
  • Published : December 31, 2017

Minho Kim 1

1상명대학교

Accredited

ABSTRACT

Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS) is known to provide nighttime light (NTL) information emitted from artificial illuminating sources such as street lamps and buildings in an urban area. DMSP OLS imagery has been widely utilized to extract built-up areas and to estimate spatial extent of an urbanized region. This research analyzed the spatio-temporal pattern of built-up areas, the characteristics of urban development, and the direction of urban expansion in Liaoning, China. According to this study, the economic policy of Chinese government for the development of this region was well reflected in the spatial expansion of built-up areas derived from the NTL data. In addition, it was found that large-sized cities, e.g., Shenyang and Dalian, have experienced continuous urbanization and the other small-sized ones have been recently developed. The three largest cities of the region are located on northeast-southwest direction, and it could be identified with the spatio-temporal changes of annual urbanization centroid in Liaoning. Based on this research, DMSP OLS is considered to be valuable as spatial proxy data for an urbanization-related study.

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