Subject
- Petroleum refineries2
- Populated places2
- Refuse and refuse disposal2
- Sewage disposal plants2
- Snow2
- Waste disposal sites2
- Water treatment plants2
- Aerial tramways1
- Conveying machinery1
- Flumes1
- Geophysical prospecting1
- Power generation sites1
- Power plants1
- Ski lifts1
- Telephone cables1
- Tunnels1
- Vegetation and climate1
- Vegetation mapping1