Subject
- Pipelines1
- Population1
- Power generation sites1
- Power plants1
- Quality1
- Quality control1
- Racetracks1
- Railroads1
- Recreation areas1
- Reefs1
- Refuse and refuse disposal1
- Sewage disposal plants1
- Sports facilities1
- Storage tanks1
- Trails1
- Tunnels1
- Vegetation and climate1
- Vegetation boundaries1
- Vegetation mapping1
- Waste disposal sites1