1. Department of Geography, National Taiwan Normal University, Taipei, Taiwan
2. Center for Geospatial Science, Education and Analytics (GeoSEA), Old Dominion University, Norfolk, USA
3. Department of Civil Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
4. Slopeland and Hydrology Division, National Science and Technology Center for Disaster Reduction, Taipei, Taiwan