Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity,College of Urban and Environmental Sciences,Northwest University,Xi’an 710127,China

Quanzhou Institute of Equipment Manufacturing,Haixi Institutes,Chinese Academy of Sciences,Quanzhou 362000,China

Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China

State Key Laboratory of Continental Dynamics,Department of Geology,Northwest University,Xi’an 710069,China