Spatial Coverage
- Bighorn National Forest (Wyo.)3
- British Columbia3
- Coahuila and Texas3
- Coahuila and Texas (Mexico)3
- Hungary3
- Los Angeles3
- Magothy Aquifer3
- Mariposa County3
- Middle Atlantic States3
- Nantucket (Mass.)3
- Nevada3
- North America3
- Okmulgee County (Okla.)3
- Ravenswood (Chicago, Ill.)3
- Somers Point3
- Switzerland3
- Tuolumne County3
- Virginia3
- Wales3
- Wyoming3
