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- Geoscientific Information13
- Geomagnetism10
- Power resources9
- Natural gas6
- Imagery and Base Maps5
- Digital elevation models4
- Elevation4
- Gas companies4
- Topographic maps3
- Biology and Ecology2
- Electric lines2
- Electric power transmission2
- Land cover2
- Magnetic declination2
- Magnetic fields2
- Bathymetric maps1
- Biodiversity1
- Calderas1
- Coal-fired power plants1
- Economy1