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  "notes": [
    "No polygon simplification; only coordinate rounding.",
    "Alaska is extracted from admin-0 north of 50 N to retain all mapped Aleutians.",
    "US states are land plus inland water: the five Great Lakes are cut out of the admin-1 outlines.",
    "England, Scotland, Wales and Northern Ireland are the United Kingdom's admin-0 map units.",
    "Europe follows Natural Earth's geographic continental division with European islands; it is not the European Union.",
    "Geometry areas are spherical checksums, not the published statistical total surface areas."
  ]
}