Acta Geodaetica et Cartographica Sinica ›› 2018, Vol. 47 ›› Issue (9): 1207-1215.doi: 10.11947/j.AGCS.2018.20170414

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Spatio-temporal Urban Sprawl Monitoring and Analysis over Beijing-Tianjin-Hebei Urban Agglomeration during 1990—2015

NING Xiaogang1, WANG Hao1, LIN Xiangguo1, CAO Yinxuan1, DU Jun2   

  1. 1. Chinese Academy of Surveying and Mapping, Beijing 100830, China;
    2. Institute of Geographical Sciences, Henan Academy of Sciences, Zhengzhou 450052, China
  • Received:2017-07-17 Revised:2018-03-21 Online:2018-09-20 Published:2018-09-26
  • Supported by:
    The National Key Research and Development Program of China(No. 2016YFE0205300);The National Natural Science Foundation of China (Nos. 41401513;41371405);The Fundamental Research Funds for the Central Public-interest Scientific Institution (Nos. 7771803;777161103)

Abstract: As an important indicator to access urbanization,the definition of urban boundary is of great importance of spatial-temporal urban sprawl monitoring and analysis.However,there are problems existed in urban boundary extraction currently,including lack of unified delimitation standards,inconsistent data sources,low or inadequate RS image resolutions,using construction land or impervious surfaces to replace urban area,etc.To solve the above-mentioned problems,a semi-automatic urban boundary extraction method based on high-resolution RS images and fundamental geoinformation data is proposed in this paper,which is referred to the concept of built-up area and the geographical distribution of urban area,and fully applied the spatial visualization characteristics of urban landscape and pattern from remote sensing images.By extracting the urban boundaries of 153 cities of Beijing-Tianjin-Hebei region in 1990,2002 and 2015 and their fundamental geoinformation data,the urbanization process in a quarter century of Beijing-Tianjin-Hebei is analyzed from the aspects of urban spatial-temporal sprawl process,urban spatial landscape and pattern changes,urban sprawl coordination,and occupied land types.The method proposed in the paper and the analysis results of urbanization process provide a great reference for urbanization monitoring and urban planning implementation and evaluation.

Key words: urban boundary, urban area, urban sprawl, Beijing-Tianjin-Hebei region, geographic conditions monitoring

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