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Pipelines
2
Population
2
Racetracks
2
Railroads
2
Reservoirs
2
Roads
2
Sports facilities
2
Swamps
2
Trails
2
Trees
2
Vegetation classification
2
Bridges
1
Electric lines
1
Electric power transmission
1
Embankments
1
Fills (Earthwork)
1
Fuelbreaks
1
Glaciers
1
Ice
1
Ice sheets
1