[1] Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210093, Jiangsu, Peoples R China
[3] Univ Waterloo, Dept Geog & Environm Management, Waterloo, ON N2L 3G1, Canada
[4] Zhejiang Univ, Inst Remote Sensing & Informat Syst Applicat, Hangzhou 310029, Zhejiang, Peoples R China