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Subject
- Oceans347
- Coasts308
- Geoscientific Information264
- Ocean bottom205
- Elevation185
- Imagery and Base Maps184
- Boundaries168
- Inland Waters140
- Environment134
- Groundwater123
- Hydrogeology123
- Seismic reflection method113
- Basins (Geology)112
- Biology and Ecology109
- Submarine topography108
- Digital elevation models101
- Marine habitats100
- Climatology, Meteorology and Atmosphere82
- Transportation70
- Remote sensing68