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Subject
Inland Waters
60
Rivers
54
Hydrology
34
Boundaries
33
Drainage
33
Transportation
31
Watersheds
29
Oceans
18
Roads
17
Location
15
Grids (Cartography)
14
Latitude
12
Longitude
12
Railroads
12
Coasts
11
Administrative and political divisions
10
Countries
10
Geoscientific Information
10
Trails
7
Bodies of water
6