1Faculty of Geomatics, East China University of Technology, Nanchang, Jiangxi 330013, China
2Research Center for Ecological Civilization Construction System of Jiangxi Province, East China University of Technology, Nanchang, Jiangxi 330013, China
3Xi'an Institute of Geotechnical Investigation and Surveying Mapping, Xi'an, Shaanxi 710054, China