{
  "reference": "swissALTI3D 2024, 2 m source, 6 m rendering grid",
  "epochs": [
    {
      "epoch": 1640,
      "angleRadians": 0.0024555255715586572,
      "angleDegrees": 0.14069125173676028,
      "translationLocal": [
        -657.8333382574649,
        -16.243990213829424,
        596.3306724188883
      ],
      "scale": 1,
      "atlasOriginLV95": [
        2594100,
        1120300,
        500
      ],
      "training": {
        "points": 2105,
        "rmseVerticalMetres": 1.2505933725769318,
        "medianAbsoluteMetres": 0.24775994730582696,
        "p95AbsoluteMetres": 2.195837453233546,
        "maxAbsoluteMetres": 15.303495770353852
      },
      "heldOut": {
        "points": 2014,
        "rmseVerticalMetres": 1.4725822520268455,
        "medianAbsoluteMetres": 0.25678467504241986,
        "p95AbsoluteMetres": 2.474590662903852,
        "maxAbsoluteMetres": 15.228653658093524
      },
      "sourceTerrainPoints": 4119,
      "method": "Rigid terrain-to-DEM least-squares registration; scale fixed to 1; alternating 100 m spatial blocks held out. Vertical surface residuals do not establish horizontal cadastral accuracy.",
      "sourceCRSKnown": false,
      "status": "estimated"
    },
    {
      "epoch": 1780,
      "angleRadians": 0.0036384275544270967,
      "angleDegrees": 0.20846654293277828,
      "translationLocal": [
        -658.4618243881571,
        -16.14742482206769,
        597.0696575478788
      ],
      "scale": 1,
      "atlasOriginLV95": [
        2594100,
        1120300,
        500
      ],
      "training": {
        "points": 2286,
        "rmseVerticalMetres": 1.199777397385053,
        "medianAbsoluteMetres": 0.2717817618009164,
        "p95AbsoluteMetres": 2.1799404638951696,
        "maxAbsoluteMetres": 15.829191313655894
      },
      "heldOut": {
        "points": 2222,
        "rmseVerticalMetres": 1.3949797508447799,
        "medianAbsoluteMetres": 0.27310550098873776,
        "p95AbsoluteMetres": 2.3152335494924463,
        "maxAbsoluteMetres": 16.78684779541973
      },
      "sourceTerrainPoints": 4508,
      "method": "Rigid terrain-to-DEM least-squares registration; scale fixed to 1; alternating 100 m spatial blocks held out. Vertical surface residuals do not establish horizontal cadastral accuracy.",
      "sourceCRSKnown": false,
      "status": "estimated"
    },
    {
      "epoch": 1840,
      "angleRadians": 0.0031721505331165707,
      "angleDegrees": 0.1817508375277536,
      "translationLocal": [
        -657.9154744260243,
        -16.190593462812902,
        593.5329124879074
      ],
      "scale": 1,
      "atlasOriginLV95": [
        2594100,
        1120300,
        500
      ],
      "training": {
        "points": 2102,
        "rmseVerticalMetres": 1.2064526210225415,
        "medianAbsoluteMetres": 0.2546030109040256,
        "p95AbsoluteMetres": 2.30335498627166,
        "maxAbsoluteMetres": 14.853983756306608
      },
      "heldOut": {
        "points": 2024,
        "rmseVerticalMetres": 1.3787366596761212,
        "medianAbsoluteMetres": 0.26334985753679163,
        "p95AbsoluteMetres": 2.359746446533338,
        "maxAbsoluteMetres": 16.9375307991515
      },
      "sourceTerrainPoints": 4126,
      "method": "Rigid terrain-to-DEM least-squares registration; scale fixed to 1; alternating 100 m spatial blocks held out. Vertical surface residuals do not establish horizontal cadastral accuracy.",
      "sourceCRSKnown": false,
      "status": "estimated"
    }
  ],
  "caution": "Recalage estimé du relief sur le terrain actuel. Pas une validation cadastrale ou un CRS source documenté."
}