1. Geoscience Information Centre, Korea Institute of Geoscience & Mineral Resources (KIGAM), Daejeon 305-350, Korea
2. Korea Ocean Satellite Centre, Korea Institute of Ocean Science & Technology, Ansan 426-744, Korea
3. Department of Geoinformatics, University of Seoul, Seoul 130-743, Korea
4. Marine Ecosystem Research Division, Korea Institute of Ocean Science & Technology, Ansan 426-744, Korea