{
  "preparedAt": "2026-10-21",
  "license": "Public domain",
  "licenseUrl": "https://www.naturalearthdata.com/about/terms-of-use/",
  "credit": "Made with Natural Earth.",
  "repository": "https://github.com/nvkelso/natural-earth-vector",
  "repositoryCommit": "ca96624a56bd078437bca8184e78163e5039ad19",
  "repositoryCommitDate": "2022-06-02T07:25:00Z",
  "scale": "1:50 million",
  "coordinates": "Longitude, latitude in decimal degrees (WGS84)",
  "processing": "Selected US/Canada admin1 and North America admin0 map units; removed unused attributes; rounded coordinates to four decimals without line simplification; merged Antigua/Barbuda polygons into one AG click target.",
  "sources": [
    {
      "file": "ne_50m_admin_1_states_provinces.geojson",
      "url": "https://raw.githubusercontent.com/nvkelso/natural-earth-vector/ca96624a56bd078437bca8184e78163e5039ad19/geojson/ne_50m_admin_1_states_provinces.geojson",
      "sha256": "69a0e06e640b2d505858ae1cb63034e4677f3000b35a98e16312932b98c426b9",
      "pinnedContentVerified": true
    },
    {
      "file": "ne_50m_admin_0_map_units.geojson",
      "url": "https://raw.githubusercontent.com/nvkelso/natural-earth-vector/ca96624a56bd078437bca8184e78163e5039ad19/geojson/ne_50m_admin_0_map_units.geojson",
      "sha256": "b8d421aca6e9e08e8cdf09cc26af111cc3e0deba4fe915611d58ade71e8a4db0",
      "pinnedContentVerified": true
    }
  ],
  "limits": [
    "Generalized modern administrative navigation shapes, not Indigenous homelands, treaty boundaries or a statement about recognition/sovereignty.",
    "Natural Earth defaults to de facto administrative boundary depiction; no legal boundary precision is claimed.",
    "Small Caribbean islands need accessible list or enlarged click targets; outlines alone may be too small at a continent scale.",
    "Alaska crosses the antimeridian; use dateline-aware projection or normalize its positive longitudes for a North America view.",
    "Hawaii is included as a US state and may need an inset.",
    "Political types and labels are copied from a Natural Earth snapshot rather than freshly adjudicated current legal status."
  ],
  "lakeLayer": {
    "preparedAt": "2026-10-21",
    "title": "Natural Earth 1:50m lakes",
    "sourceUrl": "https://raw.githubusercontent.com/nvkelso/natural-earth-vector/ca96624a56bd078437bca8184e78163e5039ad19/geojson/ne_50m_lakes.geojson",
    "repositoryCommit": "ca96624a56bd078437bca8184e78163e5039ad19",
    "sourceSha256": "d350b75978b26fe839b797c2c529b2fb8f47fb3983c03f4964e36d5df9378a52",
    "license": "Public domain",
    "licenseUrl": "https://www.naturalearthdata.com/about/terms-of-use/",
    "credit": "Made with Natural Earth.",
    "licenseVerification": "Primary Natural Earth terms were inspected during original boundary asset preparation; same dataset provider and pinned repository.",
    "processing": "Selected features whose bounding boxes intersect longitude -170 to -20 and latitude 7 to 85; retained lake names and feature class; coordinates rounded to four decimals. No additional simplification.",
    "featureCount": 194,
    "limits": [
      "Generalized cartographic lake-water polygons for a visual overlay, not navigable shorelines or legal water boundaries.",
      "Large administrative polygons can include lake water; draw lake fill above land with pointer-events:none, so water appears while state/province selection remains accessible.",
      "Overlay supplies freshwater shore context only; it does not establish Indigenous territories."
    ]
  },
  "displayNote": "Administrative polygons include some lake waters. A separately sourced lake-water overlay restores visible shorelines, including all five Great Lakes. Generalized navigation map, not survey accuracy.",
  "currentPublisherVersionReview": {
    "reviewedAt": "2026-10-21",
    "purpose": "Owner requested current authoritative geography and realistic map presentation.",
    "scale": "1:50,000,000 generalized continent/region navigation",
    "publisherCatalog": [
      {
        "theme": "50m state/province polygons",
        "listedVersion": "5.1.1",
        "url": "https://www.naturalearthdata.com/downloads/50m-cultural-vectors/50m-admin-1-states-provinces/",
        "actualContentRead": "Current publisher page's download version, scope (US/Canada), lake/coastline matching guidance and de facto boundary convention."
      },
      {
        "theme": "50m map units",
        "listedVersion": "5.1.1",
        "url": "https://www.naturalearthdata.com/downloads/50m-cultural-vectors/",
        "actualContentRead": "Current publisher catalog's map-unit download version and theme-update explanation."
      },
      {
        "theme": "50m lakes",
        "listedVersion": "5.0.0",
        "url": "https://www.naturalearthdata.com/downloads/50m-physical-vectors/50m-lakes-reservoirs/",
        "actualContentRead": "Current publisher page's version, generalized 10m origin and explicit data limitations."
      }
    ],
    "pinnedRepositoryVersions": [
      {
        "path": "50m_cultural/ne_50m_admin_1_states_provinces.VERSION.txt",
        "version": "5.1.1"
      },
      {
        "path": "50m_cultural/ne_50m_admin_0_map_units.VERSION.txt",
        "version": "5.1.1"
      },
      {
        "path": "50m_physical/ne_50m_lakes.VERSION.txt",
        "version": "5.0.0"
      }
    ],
    "repository": "https://github.com/nvkelso/natural-earth-vector",
    "repositoryCommit": "ca96624a56bd078437bca8184e78163e5039ad19",
    "result": "Pinned repository theme version files were fetched and read. Their three versions match the versions currently listed in the publisher's official catalogs. Older repository dates alone do not mean the theme has been superseded. This is version consistency, not a byte comparison against newly downloaded publisher shapefile archives.",
    "notEstablished": [
      "Literal 100% accuracy at every zoom level",
      "Survey or legal-boundary precision",
      "Real-time shorelines, changing reservoirs or cadastral detail",
      "Complete Indigenous homeland coverage or boundaries",
      "An audit against every country's current official survey dataset"
    ],
    "nextReview": "Retain scale/provenance/limits in the map, preserve all five Great Lakes and Michigan shorelines, and consider a separate performance-reviewed 1:10m detail upgrade if zoom needs justify it. Recheck publisher versions during later geography maintenance."
  }
}