1. Department of Geoinformatics, University of Seoul, Seoul, Republic of Korea
2. Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon, Republic of Korea
3. Department of Geophysical Exploration, Korea University of Science and Technology, Daejeon, Republic of Korea
4. The Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Hung Hom, Hong Kong