Analysis of urban growth from 1960 to 2015 using historical DISP and Landsat time series data in Shanghai
- PDF / 13,881,924 Bytes
- 16 Pages / 595.276 x 790.866 pts Page_size
- 99 Downloads / 174 Views
ORIGINAL PAPER
Analysis of urban growth from 1960 to 2015 using historical DISP and Landsat time series data in Shanghai Huan Mi 1 & Gang Qiao 1 & Weian Wang 1 & Yang Hong 1,2 Received: 21 December 2018 / Accepted: 13 March 2019 # Saudi Society for Geosciences 2019
Abstract Urbanization is one of the most important dimensions of contemporary global change. Urban growth affects life-supporting environment of human beings, as well as natural ecological system and biological composition. Thus, long time series urban land cover datasets with high spatial and temporal resolution are useful for understanding the dynamics of urban growth processes, providing great insights into urban planning and sustainable development in the future. For the first time, this study analyzes 55year spatiotemporal patterns of urban changes in Shanghai, China, by integrating the historical Declassified Intelligence Satellite Photography (DISP) and Landsat time series data at 5-year intervals from 1960 to 2015. Here we applied different methods to detect urban land from DISP and Landsat images, respectively, and their accuracies were quantitatively analyzed and evaluated. The spatiotemporal patterns of urban growth were explored. The derived products showed that urban land cover increased at a rapid and accelerating pace with growth concentrated at the expanding fringes of existing urban clusters. Across the study region, the total urban area increased from 205.10 to 2259.97 km2, at an average annual rate of 37.4 km2/year, and the percentage of urban area increased from 3.33 to 31.96%, expanded by more than 10 times between 1960 and 2015. In addition, urban area increased over time in all directions; the relative proportions of the urban area in downtown and non-downtown changed dramatically over the study period, indicating that urban sprawl of the metropolis experienced major transitions under the effect of population increase, economic development, and policies. Keywords Urban growth . Remote sensing . DISP . Landsat . Shanghai
Introduction Urbanization is considered to be one of the most important dimensions of contemporary global change (Song et al. 2016), which is characterized by increased population in urban areas Editorial handling: Domenico M. Doronzo * Gang Qiao [email protected] Huan Mi [email protected] Weian Wang [email protected] Yang Hong [email protected] 1
College of Surveying and Geo-Informatics, Tongji University, Shanghai 200092, China
2
School of Civil Engineering and Environmental Sciences, The University of Oklahoma, Norman, OK 73019, USA
and expanded urban land (Deng et al. 2009; Wu et al. 2015). The world urban population increased from 1.02 billion in 1970 to 3.88 billion in 2014, about 280% increase, and predicted future urban population will reach to 66.4% of the global population lives by 2050 (United Nations 2014). The ubiquity of rapid urban growth, e.g., the Washington DCBaltimore metropolitan region in the USA (Sexton et al. 2013; Song et al. 2016), the Tampa Bay watershed in the USA (Xian
Data Loading...
