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Subject
- Electric lines3
- Hospitals3
- Recreation area parking facilities3
- Water-pipes3
- Athletic fields2
- Gates2
- Spillways2
- Cabins1
- Campfires1
- Community kitchens1
- Day camps1
- Diving boards1
- Forest fires--Prevention and control1
- Groundwater1
- Memorandums1
- Picnic grounds1
- Semi-enclosed spaces (Architecture)1
- Septic tanks1
- Tanks1
- Vegetation mapping1