{
  "schema": 1,
  "version": "0.20.0",
  "models": [
    {
      "id": "w863489914",
      "name": "榆林钟楼",
      "english": "YULIN BELL TOWER",
      "city": "yuyang",
      "subtitle": "古城地标 · 钟楼",
      "description": "沿古城街巷走近钟楼，观察通街券洞、砖砌楼身和顶部亭阁。模型依据跨年代照片与立面资料制作，部分尺寸仍待核实。",
      "point": [
        39.3303,
        -10.0868
      ],
      "ll": [
        109.74956553614786,
        38.29001094218052
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      "rings": [
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            39.3191,
            -10.0928
          ],
          [
            39.3319,
            -10.0995
          ],
          [
            39.3416,
            -10.0808
          ],
          [
            39.3286,
            -10.074
          ],
          [
            39.3191,
            -10.0928
          ]
        ]
      ],
      "yawRadians": 0.4822213242279218,
      "placementMeaning": "OSM 2026-09-05 footprint centre and short-edge direction; not surveyed. Model +X along short edge, +Z along south-facing long edge.",
      "sourceURL": "https://www.openstreetmap.org/way/863489914",
      "sourceHeightM": 9.3,
      "sourceHeightMeaning": "3 storeys × 3.1 m; not measured tower height",
      "modelHeightM": 22.1,
      "heightMeaning": "Inherited visual construction choice; literature also reports 24 m. Not surveyed.",
      "asset": {
        "url": "/data/landmarks-v20/zhonglou.glb",
        "bytes": 4833668,
        "sha256": "40542615c56e8a0f9f658d0a727ac53219329d51616c2c98d24d0443e48930a0",
        "sourceSHA256": "a6058a37d05032e501e14d9749c2b0f0b97583a523bba26b55e4e8badabcbe84",
        "sourceBytes": 36243364,
        "triangles": 67472,
        "primitives": 16,
        "images": 3,
        "boundsM": [
          [
            -7.78000020980835,
            0,
            -10.324999809265137
          ],
          [
            15.149999618530273,
            22.100000381469727,
            10.324999809265137
          ]
        ]
      },
      "overviewIndex": 15618,
      "tileId": "19_-6-11-01",
      "tileIndex": 0,
      "allowedTileSHA256": [
        "593d50cc7c748016d8f6bc93bd25068cd9992232e882d9baccf8b94118493c29",
        "b2c1dc3d14ca020859084b1637cf241618eabf8c31a1822f90494dfa478d3b8d"
      ],
      "allowedOverviewSHA256": [
        "a3926f3eccf34b0993bcf5879349a9247e3d484b425ce05474281e255b6b5d2f",
        "e1e6dc2424eda40203d7244f0790cfb11910d483b9e228f9d6388571752e1569"
      ],
      "regional": {
        "index": 1167,
        "expectedRecord": [
          39.33026885986328,
          -10.08672046661377,
          0.021229999139904976,
          0.014709999784827232,
          1.0899800062179565,
          9.300000190734863,
          1.0
        ],
        "count": 11249
      },
      "evidence": {
        "research_root": "../../research/yulin-old-street-materials",
        "as_of": "2026-09-10",
        "scope": "钟楼外观样楼与类型化周边街段；资料跨年代，非2026精确现状复原",
        "components": [
          {
            "part": "brick_facades_and_windows",
            "refs": [
              "S22-007",
              "S30-051",
              "S30-047",
              "S30-055",
              "W01",
              "W02"
            ],
            "basis": "折面、两层拱窗、外廊、砖柱、压顶",
            "simplifications": "浮雕、繁复纹样与窗扇按视觉尺度简化；遮挡面按同类构造推定"
          },
          {
            "part": "base_passages",
            "refs": [
              "S30-075",
              "S30-053",
              "S30-055"
            ],
            "basis": "南北主拱道、侧向门洞与外接登楼通道",
            "simplifications": "拱宽、厚度与阶梯级数为制作选择，准确尺寸待测"
          },
          {
            "part": "upper_pavilion",
            "refs": [
              "S22-007",
              "S04-005",
              "W01"
            ],
            "basis": "顶部八角重檐亭及立面轮廓",
            "simplifications": "瓦、斗拱和屋角为程序建模；层高与隐藏节点为估计"
          },
          {
            "part": "plaques",
            "refs": [
              "S30-051",
              "S30-057"
            ],
            "basis": "南控乌延、北临雁塞",
            "simplifications": "用自制字形排版表达，未复制照片书法或贴图"
          },
          {
            "part": "shops_courtyards_and_props",
            "refs": [
              "S16-007",
              "S23-012",
              "S23-013",
              "S05"
            ],
            "basis": "灰瓦坡屋顶、木门店面、牌楼、铺装和院落类型",
            "simplifications": "具体店名、店铺顺序、院落平面、树木及摊位为艺术组合；不是现场逐铺记录"
          }
        ],
        "source_links": [
          {
            "label": "钟楼南立面图",
            "url": "https://k.sina.cn/article_5545046106_p14a82b05a027016w9i.html?from=collect"
          },
          {
            "label": "2014年钟楼及侧面照片",
            "url": "https://club.autohome.com.cn/bbs/thread/c6082869b372458e/37082731-1.html"
          },
          {
            "label": "六楼外观对照",
            "url": "https://m.thepaper.cn/baijiahao_21025055"
          }
        ],
        "rights": "程序几何与纹理在本项目制作；研究照片仅用于观察，未烘焙进模型。字体为本机思源／Noto系列。"
      },
      "recipe": {
        "version": "0.1.0",
        "seed": 91026,
        "units": "metres, artistic construction parameters; not surveyed",
        "tower": {
          "base_width": 14.8,
          "base_depth": 20,
          "base_height": 6.2,
          "main_arch_width": 4.8,
          "main_arch_spring": 2.6,
          "side_arch_width": 3.4,
          "side_arch_spring": 2.3,
          "upper_width": 13.4,
          "upper_depth": 15.8,
          "chamfer": 2.6,
          "floor_one": 6.8,
          "floor_two": 10.65,
          "parapet": 14.8,
          "pavilion_top": 22.1,
          "dimension_status": "20×14.8为重复文献线索；22.1为暂定视觉尺度，另有24m记载。分层值为建模估计，不是测量。"
        },
        "district": {
          "width": 76,
          "length": 118,
          "street_width": 10.8,
          "shop_rows": 12,
          "status": "约100米街段的类型化组合；不是连续测绘或逐铺现状"
        },
        "palette": {
          "ground": "#d0c3a6",
          "stone": "#c4bba5",
          "brick": "#a9a590",
          "roof": "#65736c",
          "wood": "#624237",
          "red": "#8f453b",
          "jade": "#3e665c",
          "gold": "#baa273",
          "leaf": "#8c9b69",
          "leaf_light": "#b3b27c",
          "dark": "#343b35"
        }
      },
      "limits": [
        "尚未测量实际坐标、楼高与北侧现状。",
        "原街段的商铺、树木与底板没有移入地图。",
        "地面沿现有约47米地形采样贴合；支撑基座属于展示处理。"
      ]
    }
  ]
}