1. School of Geography Science Nanjing Normal University Nanjing China
2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing China
3. Yunnan Key Laboratory of Earth System Science Yunnan University Kunming China
4. School of Earth and Environmental Sciences The University of Queensland Brisbane QLD Australia
5. Department of Geology and Geophysics Louisiana State University Baton Rouge LA USA