作者单位:Shen Lijun,Zheng Lang,Peng Bo,Deng Jian(Chengdu University of Technology, Chengdu 610059, China)Xiao Yuanfu(Chengdu University of Technology, Chengdu 610059, China;Key Laboratory of Geoscience Spatial Information Technology, Ministry of Land and Resources, Chengdu 610059, China)