{
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      "min_surface_block_y": 63,
      "max_surface_block_y": 101,
      "mean_surface_block_y": 87.56,
      "mean_slope": 0.26875,
      "max_sample_slope": 0.8125,
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      "is_water": false,
      "is_lava": false,
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      "detail": "Minecraft heightmap surface with explicit loaded chunk, clear feet and head space, and support excluding water, lava, air, and powder snow"
    },
    {
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      "is_water": false,
      "is_lava": false,
      "safe_teleport": true,
      "detail": "Minecraft heightmap surface with explicit loaded chunk, clear feet and head space, and support excluding water, lava, air, and powder snow"
    },
    {
      "status": "surface_probed",
      "coordinates": {
        "x": 80,
        "y": 64,
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      "is_water": false,
      "is_lava": false,
      "safe_teleport": false,
      "detail": "Minecraft heightmap surface with explicit loaded chunk, clear feet and head space, and support excluding water, lava, air, and powder snow"
    }
  ],
  "control_heights_match": true,
  "preview": {
    "format": "svg",
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    "width": 320,
    "height": 224,
    "mesh": {
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      "triangle_count": 32,
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    "semantics": "Generated surface height samples, not a voxel scene. Triangles interpolate between observed columns only."
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  "elapsed_seconds": 18.05528291600058,
  "caveats": [
    "Heights and surface states come from full official server chunks at sampled columns. Gaps between samples are not scanned.",
    "Heightmap Y is the first free height above its surface, not a verified safe teleport coordinate or structure entrance.",
    "Terrain classifications are explicit heuristic candidates. Sampled enclosure cannot prove a lake has no outlet between samples.",
    "Preference scores measure numeric target similarity, not beauty or scenic quality. Partial grids receive no preference score.",
    "The mesh interpolates surface samples only, without caves, overhangs, structures, or complete voxel geometry.",
    "Observed surfaces can include buildings and vegetation; this is not an unmodified terrain height function.",
    "The area is relative to explicit world coordinates, not actual world spawn."
  ]
}