{
  "name": "Newberry Library \u00b7 Atlas of Historical County Boundaries \u00b7 US Historical States and Territories",
  "url": "https://publications.newberry.org/ahcb/pages/United_States.html",
  "download": "https://publications.newberry.org/ahcb/downloads/gis/US_AtlasHCB_StateTerr_Gen01.zip",
  "sha256": "db6f124d913bdda718fbf4153d5b1abe569cb9b60cb2a4d73b25afb5a258c457",
  "retrieved": "2026-10-30",
  "features": 220,
  "fromDate": 17830903,
  "toDate": 20001231,
  "generalizationDegrees": 0.01,
  "note": "Dated state, territorial and equivalent jurisdictions. Displayed at the end of the selected month. These describe US administrative claims, not Indigenous sovereignty or effective occupation. No modern state outlines before coverage begins; modern reference geometry after 2000. Regional filters continue to use present-day geography.",
  "reuse": "Newberry permits any lawful use, commercial or non-commercial, without licensing or permission fees; older licence files are superseded.",
  "rights": "https://publications.newberry.org/ahcb/downloads/index.html"
}