Subject
- Boundaries4
- Biology and Ecology3
- Environment3
- Protected areas2
- Wilderness areas2
- Administrative and political divisions1
- Africanized honeybee1
- Battlefields1
- Biodiversity1
- Farming1
- Forest reserves1
- Forests and forestry1
- Fragmented landscapes1
- Historic parks1
- Historic sites1
- Inland Waters1
- Invasive species1
- Land cover1
- Landscape ecology1
- Military1