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Subject
- Planning and Cadastral156
- Boundaries43
- Geoscientific Information39
- Transportation36
- Counties28
- Inland Waters15
- Society15
- Economy14
- Administrative and political divisions12
- Environment12
- Geomagnetism10
- Minerals9
- Mines and mineral resources9
- Power resources9
- Biology and Ecology7
- Drainage6
- Faults (Geology)6
- Natural gas6
- Roads6
- Hydrography5