1. Professor Emeritus, Institute of Geoinformatics and Disaster Reduction Technology, Ching Yun Univ., Jung-Li 320, Taiwan (corresponding author).
2. Ph.D. Candidate, Institute of Geophysics, National Central Univ., Jung-Li 320, Taiwan.
3. Postdoctorate, Institute of Geoinformatics and Disaster Reduction Technology, Ching Yun Univ., Jung-Li 320, Taiwan.