{
  "retrieved": "2026-09-08",
  "source": "https://registry.opendata.aws/terrain-tiles/",
  "format": "Terrarium R*256+G+B/256-32768 meters",
  "zoom": 13,
  "gridSpacingMeters": 50.0,
  "tiles": [
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6798/3323.png",
      "sha256": "882e70f258e74d909e8d80fb10bd29e0183c49ed20759ec9ec508d433b34e88d"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6798/3324.png",
      "sha256": "7accd30fb0eb0c8f8e05e68831025e0de8c55cd5b8b90fde55e99ef929936d32"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6798/3325.png",
      "sha256": "f76914c5e8dc48a3f5790c22fec569914b0a606a4d8ae4bf9d16106e4981020c"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6798/3326.png",
      "sha256": "4aabec85c58d1cad417c67c76f99e65dc4179f75cd4254fdee40b88b6a2ffe96"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6799/3323.png",
      "sha256": "d0e1f9a7f2baa1b0b0b338dbbb46d388bb9037c5b209c48a1b9ac1511ff570f9"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6799/3324.png",
      "sha256": "7b8e30e8d43d72dedfb02a23deba6a464cd3dc4ea304e6159883d9fbfe5da13b"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6799/3325.png",
      "sha256": "047a43ed1240db619ebbafdcc8f74445bdfd968a3743297f03d96a5c90520153"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6799/3326.png",
      "sha256": "d002fcb130f6a338ce91d9682ab9911e9d8f2ec06f6ab437ea26679352a59c37"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6800/3323.png",
      "sha256": "e2a72db69278e3528aa6a8c772aaceb243117632c4109707c004d08f792f55b6"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6800/3324.png",
      "sha256": "3f0b89c15e76bf4cc6ca255647fd5154c8e8d18e598cbd113bcc8acf723f0d2f"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6800/3325.png",
      "sha256": "e1c390eaf9d81e4364420273cbe83697d204e3d983268f82549fcd021bfc8b0d"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6800/3326.png",
      "sha256": "165a4c0cc8036e3843026c9b80b772f636f241b28fb254c17e89e43dd8cd777a"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6801/3323.png",
      "sha256": "4a833e7b6036a02da27cea5e11b226c3493c5530180a0738308f12560ab90a12"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6801/3324.png",
      "sha256": "d01111621ef927791c63003aba3fca828f32aaf626a5cc6c88db2ba9f21c43ae"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6801/3325.png",
      "sha256": "85e168730c5dc571626458d3a034bae9a7e6522c89e90a4e7e1745b762682fb3"
    },
    {
      "url": "https://s3.amazonaws.com/elevation-tiles-prod/terrarium/13/6801/3326.png",
      "sha256": "5b4bc5be33f420216c74658bb8828e44dbaaed53f9b512a7ba15cd19ada49937"
    }
  ],
  "attribution": "Mapzen; SRTM/GMTED2010 terrain data courtesy of the U.S. Geological Survey",
  "modifications": "bilinear resampling; gridSpacingMeters records sampling, not source accuracy; display scaling recorded in city metadata",
  "renderBoundsWorld": [
    -22,
    -17,
    24,
    19
  ],
  "renderExtentKm": [
    9.857142857142856,
    7.7142857142857135
  ],
  "heightExaggeration": 3,
  "water": "OSM polygon with island holes. Schematic fixed level and shore mesh adjustment. Ripples are artistic, not directed lake currents.",
  "osm": {
    "attribution": "© OpenStreetMap contributors, ODbL",
    "lakeRelation": 2138994,
    "towerWay": 957807762,
    "wallWays": [
      89637327,
      89637542,
      95918075,
      223953633,
      237044575,
      552631181,
      1061627460,
      1061634138,
      1061637446,
      1061637447
    ],
    "queryBbox": [
      32.02,
      118.76,
      32.13,
      118.89
    ],
    "sha256": "0c31a50b1a7fe3935c21ae7d5d37305c094aada30474ded0e77ea71a158bcd7e",
    "towerSha256": "4a80f6402cefdfbe6483e13037fc1119e464dc84c71592e9ff9d618dab4863f2"
  },
  "tower": "44.8m OSM height; seven floors and eight sides; uniform 4x visual enlargement, not measured facade",
  "walls": "Mapped extant city_wall centerlines, clipped to view. Height from tags where present, otherwise 20m; width tags or default12m. Artistic crenellations and 1.5x vertical enlargement, not engineering dimensions. No lost walls reconstructed.",
  "geographySource": "https://www.nanjing.gov.cn/njxx/202508/t20250826_5635731.html",
  "templeSource": "https://dfz.nanjing.gov.cn/gzdt/202603/t20260304_5799793.html"
}