1. Lecturer, National-Local Joint Engineering Laboratory of Geo-spatial Information Technology, Hunan Univ. of Science and Technology, Xiangtan 411201, China; Collaborator, Hunan International Scientific and Technological Innovation Cooperation Base of Advanced Construction and Maintenance Technology of Highway, Changsha Univ. of Science and Technology, Changsha 410114, China (corresponding author).
2. Professor, School of Geosciences and Info-Physics, Central South Univ., Changsha 410083, China.
3. Professor, National-Local Joint Engineering Laboratory of Geo-spatial Information Technology, Hunan Univ. of Science and Technology, Xiangtan 411201, China.
4. Associate Professor, National-Local Joint Engineering Laboratory of Geo-spatial Information Technology, Hunan Univ. of Science and Technology, Xiangtan 411201, China.
5. Lecturer, National-Local Joint Engineering Laboratory of Geo-spatial Information Technology, Hunan Univ. Science and Technology, Xiangtan 411201, China.