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Spatial Coverage
- Alaska3,985
- California2,185
- Alabama1,972
- Tanzania1,170
- Colorado1,115
- Kentucky1,009
- Arizona1,000
- Utah943
- United States911
- Texas875
- Montana851
- Nevada835
- New Mexico803
- Oregon736
- Wyoming656
- Idaho598
- Pennsylvania569
- Massachusetts543
- Virginia528
- Illinois526
