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Subject
- Transportation45
- Structure28
- Utilities and Communication22
- Airports17
- Location16
- Buildings12
- Inland Waters11
- transportation11
- Railroad stations9
- Environment8
- Geoscientific Information7
- Groundwater7
- Hydrogeology7
- Basins (Geology)6
- Local transit6
- Cell phone services industry5
- Dams5
- Global system for mobile communications5
- Local transit stations5
- Railroads5