1 School of Geology and Geomatics, Tianjin Chengjian University, Tianjin, 300384, China.
2 School of Geology and Geomatics, Tianjin Chengjian University, Tianjin, 300384, China. gqiaozhen@163.com.
3 State Key Laboratory of Remote Sensing Science, College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100875, China.