{
  "metadata": {
    "project": "臺中市西屯區市政路延伸工程第2標（安和路至環中路三段）",
    "segment": "主線 0K+780 至 1K+020，雙側各6.5m通過車道",
    "units": "m",
    "coordinate_note": "局部 X=圖載E-211340.791，Y=圖載N-2673725.709，Z=圖載PG設計高；正左為主線里程增加方向之左側；座標/高程基準名稱待確認。",
    "local_origin": {
      "easting_m": 211340.791,
      "northing_m": 2673725.709,
      "elevation_offset_m": 0,
      "datum": "圖載基準名稱待確認"
    },
    "surface_ranges": [
      [
        0,
        1
      ],
      [
        2,
        3
      ]
    ],
    "limitations": [
      "每側6.5m採F-001兩條3.25m名目通過車道；X圖局部法向寬度3.26m等加寬未逐樁建模，不代表完整精細橫斷面。",
      "PG作零高差參考線是由PG標記與X圖交叉判讀的模型採法，原圖未直接文字指定旋轉軸。",
      "F-018少數非2m特殊偏距點未納入，2m線性內插與859.773等特殊點偏距差約0.85mm。",
      "僅重建左右各兩條3.25m主線通過車道（每側6.5m），中央空隙、左轉帶、側道、人行道及明渠未建模。",
      "圖載座標基準/投影及高程基準尚未由總說明確認；本成果以圖載E/N局部化，不宣稱地理定位。",
      "PG偏距依F-018的2m控制點及X-006/007內插；972至1000的不足1mm偏距差採線性內插。",
      "F-019坡段/PVI/豎曲線與部分逐樁高程及X圖約有10mm差異；本版依坡段/PVI參數重建，差異列於核對表。",
      "各通過車道以PG線為零高差線，依F-011橫坡剖面及X圖高程確認；並非宣稱全路幅統一繞主線旋轉。",
      "本成果是圖面幾何試作，未進行規範符合性、工程設計/施工或驗收審查。"
    ],
    "source_summary": "同一580頁設計圖PDF；F-001 p23、F-008 p30、F-011 p33、F-017 p39、F-018 p40、F-019 p41；X-001~007 p86~92。",
    "control_stations": [
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      1020
    ],
    "revision_note": "來源招標包標示1121026第二次招標包；本段圖框簽圖日期民國111年12月，未將招標日期視為設計版次。",
    "reference_line": "主線參考線 / PG設計高；此線不是中央明渠底或實際鋪面",
    "created_on": "2026-10-24"
  },
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      "station_m": 1016.508,
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}