Cheng Zhou School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China China
Yifeng Fei School of Resources and Environment and Center for Information Geoscience, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China China
Xin He School of Resources and Environment and Center for Information Geoscience, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China China
Hanpeng Cai School of Resources and Environment and Center for Information Geoscience, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China China
Xingmiao Yao School of Resources and Environment and Center for Information Geoscience, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China China
Guangmin Hu School of Resources and Environment and Center for Information Geoscience, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China China