{
  "sources": [
    {
      "id": "geoiao_edo_domains_1862",
      "creator": "iao / geoiao",
      "title": "Edo Domains (c. 1862) v0.1",
      "url": "https://github.com/geoiao/edo-domains",
      "downloadUrl": "https://github.com/geoiao/edo-domains/releases/download/v0.1/edo-domains-gpkg.zip",
      "doi": "10.5281/zenodo.17139791",
      "license": "CC0-1.0",
      "sourceSha256": "3e2f5b30a44cd4a41b25e3c0720dba2d076fd29de5a76ae36341b4d5a6aeebd4",
      "scope": "約1862年・266藩の復元村域。全領域や正確な年次支配境界を保証しない。",
      "transformation": "村域を藩単位で統合、0.007度の許容差で形状維持の簡略化、表示座標に変換。"
    },
    {
      "id": "geoboundaries_jpn_land_2022",
      "creator": "William & Mary geoLab / geoBoundaries; original source MLIT",
      "title": "geoBoundaries gbOpen JPN ADM0（2022）",
      "url": "https://www.geoboundaries.org/api/current/gbOpen/JPN/ADM0/",
      "downloadUrl": "https://github.com/wmgeolab/geoBoundaries/raw/9469f09/releaseData/gbOpen/JPN/ADM0/geoBoundaries-JPN-ADM0_simplified.geojson",
      "license": "CC BY 4.0",
      "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
      "sourceSha256": "5b68d2cede4eff2422a5d3542315bf42682b1885db7707ccd4ccad966162989f",
      "scope": "現代の参照地形。歴史上の領域や海岸線とは別。",
      "transformation": "0.008度の許容差で簡略化、表示座標に変換。"
    }
  ],
  "accessedOn": "2026-10-15",
  "domainCount": 266,
  "provinceAnchorCount": 69,
  "mapBytes": 1068485,
  "landSourceGeometryPreservedAs": "projected SVG paths; display simplification recorded",
  "generatedBy": "scripts/build-history-map.py (shapely 2.2.0)"
}