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  "features": {
    "日光岩": {
      "id": 1762860367,
      "type": "node",
      "position": [
        -6.691270076286429,
        8.838120598999744
      ]
    },
    "云顶岩": {
      "id": 7523722677,
      "type": "node",
      "position": [
        9.020724083261953,
        4.876113780999729
      ]
    },
    "蔡尖尾山": {
      "id": 7144895640,
      "type": "node",
      "position": [
        -16.992106228177484,
        -3.339920045000109
      ]
    },
    "八卦楼": {
      "id": 164652578,
      "type": "way",
      "position": [
        -6.517964727144051,
        7.767799777533454
      ]
    }
  },
  "water": "Directed OSM coastlines with polygonized island holes. Yundang Lake is a separate mapped polygon. Fixed artistic water level and animated surface highlights; no inferred tidal currents or navigation routes.",
  "terrain": "Independent 62.5m sampling; Gaussian 0.85 plus lowland median filtering below 65m; 3.5x relief. Sampling is not source accuracy; not lidar.",
  "urban": "Mapped residential surface coloration; no urban building grid.",
  "landmarks": "Bagualou source museum footprint and stylized red octagonal dome, columns and arcades. Enlarged 2.8x horizontally; assumed architecture heights, not a measured reconstruction.",
  "sources": [
    "https://zygh.xm.gov.cn/zwgk/zdxxgk/ghcg/zxgh/202108/t20210813_2574300.htm",
    "https://www.fujian.gov.cn/xwdt/mszx/202608/t20260806_7196669.htm"
  ]
}