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Spatial Coverage
- Texas11
- West Virginia10
- Illinois4
- New Hampshire3
- Virginia3
- Archuleta County (Colo.)2
- Grand Canyon National Park (Ariz.)2
- Hinsdale County (Colo.)2
- Kentucky2
- La Plata County (Colo.)2
- Mineral County (Colo.)2
- Missouri2
- Ohio2
- Pennsylvania2
- Tennessee2
- Vermont2
- Wisconsin2
- Alaska Peninsula (Alaska)1
- Aleutian Range (Alaska)1
- Aniakchak National Monument and Preserve (Alaska)1
