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Remote Sensing Technology and Application  2015, Vol. 30 Issue (6): 1153-1159    DOI: 10.11873/j.issn.1004-0323.2015.6.1153
The Detection of Urbanization Process by VANUI Index in Jing-Jin-Ji Area from 2001~2012
Zhang Xiaoxuan1,2,Hu Yonghong2,Fan Yanguo1
(1.School of Geosciences,China University of Petroleum,Qingdao 266580,China;
2.Key Laboratory of Digital Earth,Institute of Remote Sensing and Digital Earth,
Chinese Academy of Sciences,Beijing 100094,China)
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Rapid urbanization has changed land surface properties and land-atmosphere interaction,which further may impact on the climate and environment.It is important for urban sustainability to timely and accurate monitor regional or global urbanization process.Currently,urban area in large scale could be derived from satellite images,and DMSP/OLS has already been widely used to detect global urbanization due to its time series.However,its saturation in urban area largely limited its further application.Therefore,an improved urban index (VANUI) was used to detect urbanization process in JING-JIN-JI area from 2001-2012 to examine its fitness in mega-city area,further provide reasonable information for urban planning and urban sustainability.Compared with the traditional night lights index,VANUI is indeed to improve the monitoring ability for urban center and reduce the influence of signal saturation on parameters derivation.The results showed that VANUI could catch the urbanization process that happened in JING-JIN-JI area during last decades.Spatial pattern of urban expansion from 2001-2012 indicated that the urban area of JING-JIN-JI was doubled from 2001-2012,and the fasted region about urbanization happened in Tangshan,Hebei Province.Linear trend was also detected in urban development by VANUI index from 2001-2012,and the most important increasing period showed in 2004-2007 and 2009-2012.

Key words:  Urbanization      Night light      VANUI     
Received:  13 September 2014      Published:  25 January 2016
TP 79  
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Zhang Xiaoxuan
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Zhang Xiaoxuan,Hu Yonghong,Fan Yanguo. The Detection of Urbanization Process by VANUI Index in Jing-Jin-Ji Area from 2001~2012. Remote Sensing Technology and Application, 2015, 30(6): 1153-1159.

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