| Author(s) | Organisation(s) | Session |
| O'Connor, Brian | UNEP-WCMC, 219 Huntingdon Road, Cambridge, CB3 0DL, United Kingdom | Responding to User Needs (cont'd) |
| Obregon, Andre | GEO Secretariat, Geneva, Switzerland; Group on Earth Observations (GEO) Secretariat, Switzerland | Opening Session (cont'd), Responding to User Needs (cont'd), 1.3 |
| Olivier, Hagolle | CESBIO, France | 2.2 |
| Ostapowicz, Katarzyna Anna | Jagiellonian University, Poland; Jagiellonian University, Institute of Geography and Spatial Management, Poland | 1.3, 1.3, 1.3 |
| Ottinger, Marco | Department of Remote Sensing, Institute of Geography and Geology, University of Wuerzburg, Germany | Large-scale Mapping of Specific LC (cont'd) |
| Ottlé, Catherine | Laboratoire des Sciences du Climat et de l'Environnement, France | 2.1, 2.1 |
| Oyoshi, Kei | Japan Aerospace Exploration Agency, Japan | 1.3 |
| Ozdogan, Mutlu | University of Wisconsin-Madison, Madison WI, US | 1.3 |