{
  "schemaVersion": 1,
  "area": "桃園市桃園區鎮撫街46號周邊，遊戲場景半徑200公尺",
  "updatedAt": "2026-10-06",
  "calibrationStatus": "estimated-not-site-calibrated",
  "summary": "地坪近景材質是程序化視覺推估。現有資料不足以確認鎮撫街46號門前的實際鋪面顏色、接縫形狀或當前標線狀態。",
  "sources": [
    {
      "id": "self-generated-osm-context",
      "type": "procedural-game-ground",
      "provider": "本專案自主繪製",
      "file": null,
      "role": "自主底色與程序顆粒；OSM 道路及綠地只提供位置",
      "limitations": "未使用航照像素；顏色與材質不代表現況。",
      "license": "Generated appearance is project-created; geodata-derived layer under ODbL."
    },
    {
      "id": "osm-local",
      "type": "road-centerlines-and-crossings",
      "file": "osm-200m.json, crossings.json",
      "provider": "OpenStreetMap contributors",
      "role": "道路中心線、道路類別及有標記的斑馬線位置",
      "limitations": "遊戲路寬、人行道寬度與路緣位置是估算；不含鋪面色碼。"
    },
    {
      "id": "osm-asphalt-tags",
      "type": "road-surface-category",
      "sourceRepositoryPath": "engine/unity-outdoor/RealFarm/sources/derived/roads.geojson",
      "provider": "OpenStreetMap contributors",
      "role": "鎮撫街兩段道路的 surface=asphalt 類別佐證",
      "sourceWays": [
        "https://www.openstreetmap.org/way/1276792256",
        "https://www.openstreetmap.org/way/1276792257"
      ],
      "limitations": "asphalt 只說明路面類別，無法推算色值、補丁、老化或目前狀態；來源檔不在公開 3D 場景內。"
    },
    {
      "id": "mapillary-chunri-2019",
      "type": "nearby-street-photo-visual-reference-only",
      "url": "https://www.mapillary.com/app/?pKey=824649271764118",
      "provider": "Mapillary contributor",
      "photoDate": "2019-11-29",
      "location": {
        "lat": 24.998157575327,
        "lon": 121.31510927362
      },
      "approxDistanceFromSceneOriginMeters": 46.1,
      "role": "僅參考春日路附近柏油與標線的視覺方向；未複製照片像素製作材質",
      "limitations": "位於春日路，並非鎮撫街46號門前；2019年的影像無法驗證目前色彩。"
    }
  ],
  "layers": [
    {
      "id": "asphalt",
      "basis": "procedural-estimate",
      "siteMeasured": false,
      "note": "冷灰色碎粒與輕微磨耗是視覺推估，不是現場採色。"
    },
    {
      "id": "walkway",
      "basis": "procedural-estimate",
      "siteMeasured": false,
      "note": "鋪面板塊、縫線、色差均未由46號門前照片校準。"
    },
    {
      "id": "curbs",
      "basis": "road-centerline-buffer-estimate",
      "siteMeasured": false,
      "note": "12公分路緣高度與位置未實測。"
    },
    {
      "id": "zebra-crossings",
      "basis": "osm-crossings-json",
      "siteMeasured": false,
      "note": "只依標記為zebra的位置繪出；形狀及當前漆面狀態未現勘。"
    },
    {
      "id": "other-road-markings",
      "basis": "nearby-2019-photo-and-road-geometry",
      "siteMeasured": false,
      "sourceRoadId": "way/5118000",
      "rendered": "春日路路口往北18至32公尺、44至58公尺各一小段雙黃線",
      "note": "僅在有影像參考的春日路段做保守繪製；鎮撫街46號門前未新增標線。"
    }
  ]
}