{
  "schemaVersion": 1,
  "title": "Maps That Age - Cartometry evidence export",
  "methodology": "Counts documented plate interventions; it does not calculate pixel or geographic error across differently cropped scans.",
  "records": [
    {
      "stateId": "ort1-1",
      "mapId": "age-ort1-1570",
      "year": 1570,
      "plate": 1,
      "state": "1.1",
      "plateAgeYears": 0,
      "cumulativeDocumentedInterventions": 1,
      "intervention": "First documented state",
      "evidence": "Complete oblique hachuring around the lower Cicero cartouche.",
      "confidence": "high",
      "sourceId": "vandenbroecke-ort1",
      "sourceUrl": "https://orteliusmaps.com/book/ort1.html"
    },
    {
      "stateId": "ort1-2",
      "mapId": "age-ort1-1575",
      "year": 1575,
      "plate": 1,
      "state": "1.3",
      "plateAgeYears": 5,
      "cumulativeDocumentedInterventions": 2,
      "intervention": "Plate repair",
      "evidence": "Bolt impressions appear at the lower-left corner around a crack.",
      "confidence": "high",
      "sourceId": "vandenbroecke-ort1",
      "sourceUrl": "https://orteliusmaps.com/book/ort1.html"
    },
    {
      "stateId": "ort1-3",
      "mapId": "age-ort1-1579",
      "year": 1579,
      "plate": 1,
      "state": "1.4",
      "plateAgeYears": 9,
      "cumulativeDocumentedInterventions": 3,
      "intervention": "Crack mended; clouds reworked",
      "evidence": "The crack is less visible and cloud linework has been reworked.",
      "confidence": "high",
      "sourceId": "vandenbroecke-ort1",
      "sourceUrl": "https://orteliusmaps.com/book/ort1.html"
    },
    {
      "stateId": "ort1-4",
      "mapId": "age-ort1-1584",
      "year": 1584,
      "plate": 1,
      "state": "1.5",
      "plateAgeYears": 14,
      "cumulativeDocumentedInterventions": 4,
      "intervention": "Date added amid wear",
      "evidence": "The date 1584 appears beside Hogenberg’s signature while cartouche hachuring has faded.",
      "confidence": "high",
      "sourceId": "vandenbroecke-ort1",
      "sourceUrl": "https://orteliusmaps.com/book/ort1.html"
    },
    {
      "stateId": "ort2-1",
      "mapId": "age-ort2-1587",
      "year": 1587,
      "plate": 2,
      "state": "2.1",
      "plateAgeYears": 0,
      "cumulativeDocumentedInterventions": 5,
      "intervention": "Replacement plate",
      "evidence": "A newly cut plate is dated 1586 and retains clouds in the corners.",
      "confidence": "high",
      "sourceId": "vandenbroecke-ort2",
      "sourceUrl": "https://orteliusmaps.com/book/ort2.html"
    },
    {
      "stateId": "ort2-2",
      "mapId": "age-ort2-1588",
      "year": 1588,
      "plate": 2,
      "state": "2.3",
      "plateAgeYears": 1,
      "cumulativeDocumentedInterventions": 6,
      "intervention": "Coastline corrected",
      "evidence": "The South American coastline is corrected while corner clouds remain.",
      "confidence": "high",
      "sourceId": "vandenbroecke-ort2",
      "sourceUrl": "https://orteliusmaps.com/book/ort2.html"
    },
    {
      "stateId": "ort3-1",
      "mapId": "age-ort3-1613",
      "year": 1589,
      "plate": 3,
      "state": "3.1",
      "plateAgeYears": 0,
      "cumulativeDocumentedInterventions": 7,
      "intervention": "Third plate replaces predecessors",
      "evidence": "Corrected South America, four corner medallions and no clouds distinguish the plate.",
      "confidence": "high",
      "sourceId": "vandenbroecke-ort3",
      "sourceUrl": "https://orteliusmaps.com/book/ort3.html"
    },
    {
      "stateId": "ort3-2",
      "mapId": "age-ort3-1613",
      "year": 1613,
      "plate": 3,
      "state": "3.2",
      "plateAgeYears": 24,
      "cumulativeDocumentedInterventions": 8,
      "intervention": "Posthumous geographic update",
      "evidence": "Le Maire Strait is added, the 1587 date is removed and strapwork hachuring changes.",
      "confidence": "medium",
      "sourceId": "vandenbroecke-ort3",
      "sourceUrl": "https://orteliusmaps.com/book/ort3.html"
    }
  ]
}