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	Spatiotemporal measurement of urbanization levels based on multiscale units: A case study of the Bohai Rim Region in China
	Zhao M.; Cheng, W. M.; Liu, Q. Y.; Wang, N.; Zhan, CS; Qiao, YF; Wang, YL; Xia, J; Zhang, YY; Yu, JJ
	2016
关键词	nighttime light data urbanization level multiscale units Bohai Rim nighttime light imagery up urban areas dmsp-ols primary productivity power consumption satellite imagery classification dynamics system states
英文摘要	Urbanization is a complex process reflecting the growth, formation and development of cities and their systems. Measuring regional urbanization levels within a long time series may ensure healthy and harmonious urban development. Based on DMSP/OLS night-time light data, a human-computer interactive boundary correction method was used to obtain information about built-up urban areas in the Bohai Rim region from 1992 to 2012. Consequently, a method was proposed and applied to measure urbanization levels using four measurement scale units: administrative division, land-sea location, terrain feature, and geomorphological types. Our conclusions are: 1) The extraction results based on DMSP/OLS nighttime light data showed substantial agreement with those obtained using Landsat TM/ETM+ data on spatial patterns. The overall accuracy was 97.70% on average, with an average Kappa of 0.79, indicating that the results extracted from DMSP/OLS nighttime light data were reliable and could well reflect the actual status of built-up urban areas. 2) Bohai Rim's urbanization level has increased significantly, demonstrating a high annual growth rate from 1998 to 2006. Areas with high urbanization levels have relocated evidently from capital to coastal cities. 3) The distribution of built-up urban areas showed a certain degree of zonal variation. The urbanization level was negatively correlated with relief amplitude and altitude. A high level of urbanization was found in low altitude platforms and low altitude plains, with a gradual narrowing of the gap between these two geomorphological types. 4) The measurement method presented in this study is fast, convenient, and incorporates multiple perspectives. It would offer various directions for urban construction and provide reference values for measuring national-level urbanization.
出处	Journal of Geographical Sciences
卷	26
期	5
页	531-548
收录类别	SCI
语种	英语
ISSN号	1009-637X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43943]
专题	生态系统网络观测与模拟院重点实验室_生态网络实验室
推荐引用方式 GB/T 7714	Zhao M.,Cheng, W. M.,Liu, Q. Y.,et al. Spatiotemporal measurement of urbanization levels based on multiscale units: A case study of the Bohai Rim Region in China. 2016.

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