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Aquifers
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Battlefields
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Biology and Ecology
1
Bodies of water
3
Boundaries
3
Canals
1
Coasts
2
Drainage
2
Environment
1
Farming
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Forest reserves
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Geoscientific Information
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Glaciers
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Groundwater
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Historic parks
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Historic sites
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Hydrogeology
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Hydrography
5
Hydrology
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Inland Waters
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