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Spatial Coverage
- West Virginia7
- Michigan6
- California5
- Mississippi3
- Pennsylvania3
- Texas3
- Colorado2
- Georgia2
- Illinois2
- New York2
- Washington2
- Wisconsin2
- Archuleta County (Colo.)1
- Chinitna Bay Region (Alaska)1
- Colockum Pass (Wash.)1
- Columbia River1
- Conejos County (Colo.)1
- Cook Inlet Region (Alaska)1
- Douglas County (Wash.)1
- Grant County (Wash.)1
