Subject
- Environment7
- Boundaries4
- Biology and Ecology3
- Geoscientific Information3
- Inland Waters3
- Oceans2
- Protected areas2
- Society2
- Wilderness areas2
- Administrative and political divisions1
- Africanized honeybee1
- Bathymetric maps1
- Battlefields1
- Biotic communities1
- Calderas1
- Cities and towns1
- Contours (Cartography)1
- Dams1
- Earthquake intensity1
- Earthquake magnitude1