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Spatial Coverage
- Alameda County1
- California1
- Contra Costa County1
- Culberson County1
- El Paso County1
- EĢtats-Unis1
- Glacier National Park (Mont.)1
- Hunterdon County1
- Kuskokwim River Region (Alaska)1
- Laramie County (Wyo.)1
- Maine1
- Marin County1
- Morris County1
- New Jersey1
- San Francisco1
- San Mateo County1
- Somerset County1
- Sussex County1
- Texas1
- Warren County1
