1. Key Laboratory of Remote Sensing Monitoring of Geographic Environment, College of Heilongjiang Province, Harbin Normal University, 150025 - Harbin, China
2. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, n. 9 Dengzhuang South Road, Haidian District, 100094, Beijing - China
3. Department of Geography, University of Wisconsin-Milwaukee, 53201 - Milwaukee, U.S.A.