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Spatial Coverage
- Alaska3,994
- California2,197
- Alabama1,973
- Tanzania1,178
- Colorado1,118
- Kentucky1,009
- Arizona1,002
- United States952
- Utah945
- Texas880
- Montana851
- Nevada835
- New Mexico806
- Oregon736
- Wyoming656
- Idaho598
- Pennsylvania572
- Massachusetts544
- Virginia542
- Illinois527
