Spatial Coverage
- Mars (Planet)49
- Rhode Island48
- San Juan County (N.M.)48
- Black Hills (S.D. and Wyo.)41
- Delaware33
- Garfield County33
- Campbell County32
- Saudi Arabia32
- United States.31
- Michigan.28
- Grant County27
- Alaska.26
- San Bernardino County26
- Petersburg Region24
- Custer County22
- Rio Arriba County22
- California, Southern21
- Cochise County21
- Elko County21
- Sandoval County20
