{
  "experiment_id": "1908-gwanin-gyeonghaeng-001",
  "review_date": "2026-09-08",
  "source_asset_id": "asset-0005",
  "target_asset_id": "asset-0012",
  "points_path": "gis/control_points/1908_gwanin_gyeonghaeng_points.csv",
  "point_selection_basis": "Matching sequence of distinctive shared administrative-boundary corners, with the reciprocal Gwanin/Gyeonghaeng labels on the two 1908 sheets",
  "point_review_method": "Manual visual review of original-image corner patches; approximate reading uncertainty ±3 pixels; role assignment frozen before fitting",
  "model": "affine",
  "geographic_crs": null,
  "predeclared_max_check_rmse_target_px": 20,
  "threshold_purpose": "Coarse image join screening; same pixel screening threshold as the prior review; not a metric accuracy criterion",
  "controls": [
    "b01",
    "b02",
    "b03",
    "b04",
    "b05"
  ],
  "checks": [
    "b06",
    "b07",
    "b08",
    "b09"
  ],
  "limitations": [
    "Controls and checks lie on a shared boundary rather than throughout both map interiors.",
    "The two maps may share survey lineage, so agreement is not independent historical corroboration.",
    "This does not resolve the 1908-to-1912 correspondence or establish a geographic CRS."
  ],
  "result": {
    "matrix_source_to_target": [
      [
        1.0078849632448752,
        -0.008155537426520284,
        40.994722604613
      ],
      [
        0.018626624533535672,
        0.9875063033225573,
        -55.324144622090216
      ],
      [
        0.0,
        0.0,
        1.0
      ]
    ],
    "metrics": {
      "control": {
        "count": 5,
        "rmse_px": 3.509151972237779,
        "max_px": 6.197962230220075
      },
      "check": {
        "count": 4,
        "rmse_px": 3.309765805907303,
        "max_px": 5.005367543784899
      }
    },
    "within_pixel_tolerance": true,
    "points_sha256": "95f32a76dbcb92897f903579a329f8aa7567f200421b1cd8a18076ef273bb330",
    "inputs": {
      "source": {
        "path": "data/cadastral/src-0010/asset-0005.jpg",
        "sha256": "d052b9d1afa8f86735c5d22e6b86620b771baac539dcced41338a6bbca238e9f"
      },
      "target": {
        "path": "data/cadastral/src-0017/asset-0012.jpg",
        "sha256": "61235ec3a36b050d0f23a4c1e7d5e9ad173a883e6a9f47fd7968373cb7776af7"
      }
    },
    "report_path": "gis/georeferenced/1908_gwanin_gyeonghaeng_affine.json",
    "interpretation": "Shared-boundary pixel join supported by manual review; geographic accuracy and cross-year correspondence remain unverified."
  }
}