{
 "meta": {
  "project": "Proposed 3-storey assisted-living apartment block (19 x 1-bed, Use Class C2), Land at Wheatsheaf PH, 1 Turners Hill, Rowley Regis B65 9DP (corner of Oakham Road)",
  "sources": [
   "Gould Singleton Architects 25-2121/111 rev H (Ground & First Floor Plans, 1:100@A1)",
   "25-2121/113 rev B (Second Floor & Roof Plan, 1:100@A1)",
   "Levels cross-checked from NMA_26_00295 elevations sheet (section AA / front elevation)"
  ],
  "units": "metres",
  "coordinate_system": {
   "origin": "SW corner of the overall building bounding box = outer face of the west wall of the upper-floor west wing (x) and outer face of the south wall of Stair A / Apts 3,7,15 (y). Same origin for every floor and the roof.",
   "axes": "+X = east (right on the drawing sheet), +Y = north (up on the sheet). North arrow on both sheets points straight up the sheet (no rotation drawn).",
   "threejs_hint": "Use world.x = X, world.z = -Y, world.y = height (FFL + ...). Building extents: X 0..32.10, Y 0..22.64.",
   "pdf_to_local": "Left plan panels (Ground, Second): X=(x_pt-155.0)/28.3465, Y=(1048.7-y_pt)/28.3465. Right panels (First, Roof): X=(x_pt-1273.4)/28.3465, same Y. 28.3465 pt = 1 m at 1:100 on A1 (verified against drawn 10 m scale bar: 283.44 pt).",
   "accuracy": "Vector-derived; wall faces typically +/-0.02 m. Validation: GEA minus 0.4 m external wall band gives 282.9 m2 (GF, stated 283) and 513.9 m2 (FF/SF, stated 514)."
  },
  "wall_thickness_m": {
   "external": 0.4,
   "party_and_corridor_walls": 0.3,
   "minor_solid_walls": 0.2,
   "lightweight_partitions": "~0.10 (drawn as thin double lines, NOT included in walls[] polygons)"
  },
  "levels_m": {
   "ground_ffl": 0.0,
   "first_ffl": 2.925,
   "second_ffl": 5.85,
   "floor_to_floor": 2.925,
   "clear_ceiling_apartments": 2.4,
   "clear_height_undercroft_car_park": 2.625,
   "roof_parapet_top_approx": 9.1,
   "lift_overrun_top_approx": 9.55,
   "note": "Levels from elevations/section (FFFL+2925, SFFL+5850, 3255 from SFFL to parapet line; GFFL shown as +150 mm above external ground on front elevation). Parapet/overrun heights approximate - defer to elevations research."
  }
 },
 "floors": {
  "ground": {
   "level_name": "Ground floor",
   "ffl_m": 0.0,
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   "outline_area_gea_m2": 313.9,
   "walls": [
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   "units": [
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     "id": "Apt 1",
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     "stated_gia_m2": 50.4,
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     "type": "1-bed assisted-living apartment (C2)",
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         11.199,
         17.597
        ],
        [
         11.177,
         17.597
        ],
        [
         11.177,
         17.521
        ],
        [
         11.025,
         17.521
        ],
        [
         11.033,
         17.479
        ]
       ],
       [
        [
         9.229,
         20.959
        ],
        [
         9.28,
         20.912
        ],
        [
         9.349,
         20.912
        ],
        [
         9.382,
         20.929
        ],
        [
         9.382,
         21.102
        ],
        [
         9.061,
         21.102
        ],
        [
         9.077,
         21.149
        ],
        [
         8.769,
         21.149
        ],
        [
         8.769,
         20.959
        ]
       ]
      ]
     },
     "centroid": [
      11.495,
      18.931
     ],
     "type": "1-bed assisted-living apartment (C2)",
     "beds": 1
    }
   ],
   "other_spaces": [
    {
     "labels": [],
     "area_m2": 19.2,
     "polygon": {
      "outer": [
       [
        17.688,
        8.974
       ],
       [
        15.838,
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       ],
       [
        15.838,
        6.527
       ],
       [
        14.238,
        6.527
       ],
       [
        14.238,
        13.965
       ],
       [
        11.715,
        13.965
       ],
       [
        11.715,
        15.167
       ],
       [
        15.741,
        15.167
       ],
       [
        15.741,
        10.477
       ],
       [
        17.688,
        10.477
       ]
      ],
      "holes": []
     },
     "name": "Corridor"
    },
    {
     "labels": [
      "Stair A"
     ],
     "area_m2": 15.0,
     "polygon": {
      "outer": [
       [
        13.717,
        0.0
       ],
       [
        13.717,
        0.401
       ],
       [
        12.888,
        0.401
       ],
       [
        12.888,
        6.227
       ],
       [
        15.39,
        6.227
       ],
       [
        15.39,
        0.401
       ],
       [
        14.852,
        0.401
       ],
       [
        14.852,
        0.0
       ]
      ],
      "holes": []
     },
     "name": "Stair A (with refuge)"
    },
    {
     "labels": [
      "Stair B"
     ],
     "area_m2": 12.7,
     "polygon": {
      "outer": [
       [
        16.037,
        13.876
       ],
       [
        16.04,
        18.507
       ],
       [
        18.539,
        18.507
       ],
       [
        18.539,
        12.826
       ],
       [
        17.439,
        12.826
       ],
       [
        17.439,
        13.876
       ]
      ],
      "holes": []
     },
     "name": "Stair B (with refuge)"
    },
    {
     "labels": [],
     "area_m2": 9.6,
     "polygon": {
      "outer": [
       [
        3.6,
        13.82
       ],
       [
        3.6,
        15.167
       ],
       [
        11.414,
        15.167
       ],
       [
        11.414,
        13.965
       ],
       [
        5.103,
        13.965
       ],
       [
        5.103,
        13.82
       ]
      ],
      "holes": []
     },
     "name": "Corridor"
    },
    {
     "labels": [],
     "area_m2": 7.6,
     "polygon": {
      "outer": [
       [
        23.99,
        9.164
       ],
       [
        23.839,
        9.164
       ],
       [
        23.839,
        8.974
       ],
       [
        17.989,
        8.974
       ],
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        17.989,
        10.176
       ],
       [
        22.341,
        10.176
       ],
       [
        22.341,
        10.477
       ],
       [
        23.839,
        10.477
       ],
       [
        23.839,
        10.176
       ],
       [
        23.99,
        10.176
       ]
      ],
      "holes": []
     },
     "name": "Corridor"
    },
    {
     "labels": [],
     "area_m2": 2.9,
     "polygon": {
      "outer": [
       [
        16.037,
        10.777
       ],
       [
        16.037,
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       ],
       [
        17.688,
        12.526
       ],
       [
        17.688,
        10.777
       ]
      ],
      "holes": []
     },
     "name": "Lift shaft"
    },
    {
     "labels": [
      "Serv"
     ],
     "area_m2": 1.4,
     "polygon": {
      "outer": [
       [
        13.938,
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       ],
       [
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        6.527
       ],
       [
        12.888,
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       ],
       [
        13.938,
        7.827
       ]
      ],
      "holes": []
     },
     "name": "Serv (riser cupboard)"
    }
   ],
   "envelope_openings": [
    {
     "a": [
      0.0,
      14.025
     ],
     "b": [
      0.0,
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     ],
     "width_m": 0.6,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
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     ],
     "facing_bearing_deg": 270,
     "facade": "W"
    },
    {
     "a": [
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     ],
     "b": [
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     ],
     "width_m": 0.6,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      0.0,
      16.617
     ],
     "facing_bearing_deg": 270,
     "facade": "W"
    },
    {
     "a": [
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     ],
     "b": [
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     ],
     "width_m": 1.53,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      2.095,
      6.128
     ],
     "facing_bearing_deg": 180,
     "facade": "S"
    },
    {
     "a": [
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     ],
     "b": [
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     ],
     "width_m": 1.53,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
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     ],
     "facing_bearing_deg": 0,
     "facade": "N"
    },
    {
     "a": [
      4.705,
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     ],
     "b": [
      6.118,
      22.631
     ],
     "width_m": 1.41,
     "type_guess": "door / patio door",
     "parallel_frame_lines": 0,
     "mid": [
      5.412,
      22.631
     ],
     "facing_bearing_deg": 0,
     "facade": "N"
    },
    {
     "a": [
      6.22,
      6.128
     ],
     "b": [
      4.811,
      6.128
     ],
     "width_m": 1.41,
     "type_guess": "door / patio door",
     "parallel_frame_lines": 0,
     "mid": [
      5.515,
      6.128
     ],
     "facing_bearing_deg": 180,
     "facade": "S"
    },
    {
     "a": [
      9.484,
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     ],
     "b": [
      8.07,
      6.128
     ],
     "width_m": 1.41,
     "type_guess": "door / patio door",
     "parallel_frame_lines": 0,
     "mid": [
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      6.128
     ],
     "facing_bearing_deg": 180,
     "facade": "S"
    },
    {
     "a": [
      8.176,
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     ],
     "b": [
      9.59,
      22.631
     ],
     "width_m": 1.41,
     "type_guess": "door / patio door",
     "parallel_frame_lines": 0,
     "mid": [
      8.883,
      22.631
     ],
     "facing_bearing_deg": 0,
     "facade": "N"
    },
    {
     "a": [
      12.307,
      6.128
     ],
     "b": [
      10.78,
      6.128
     ],
     "width_m": 1.53,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      11.543,
      6.128
     ],
     "facing_bearing_deg": 180,
     "facade": "S"
    },
    {
     "a": [
      12.596,
      22.631
     ],
     "b": [
      14.119,
      22.631
     ],
     "width_m": 1.52,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      13.357,
      22.631
     ],
     "facing_bearing_deg": 0,
     "facade": "N"
    },
    {
     "a": [
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      0.0
     ],
     "b": [
      13.747,
      0.0
     ],
     "width_m": 1.07,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      14.284,
      0.0
     ],
     "facing_bearing_deg": 180,
     "facade": "S"
    },
    {
     "a": [
      18.086,
      0.0
     ],
     "b": [
      16.558,
      0.0
     ],
     "width_m": 1.53,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      17.322,
      0.0
     ],
     "facing_bearing_deg": 180,
     "facade": "S"
    },
    {
     "a": [
      19.759,
      18.905
     ],
     "b": [
      21.282,
      18.905
     ],
     "width_m": 1.52,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      20.52,
      18.905
     ],
     "facing_bearing_deg": 0,
     "facade": "N"
    },
    {
     "a": [
      21.235,
      0.0
     ],
     "b": [
      19.822,
      0.0
     ],
     "width_m": 1.41,
     "type_guess": "door / patio door",
     "parallel_frame_lines": 0,
     "mid": [
      20.529,
      0.0
     ],
     "facing_bearing_deg": 180,
     "facade": "S"
    },
    {
     "a": [
      22.464,
      18.905
     ],
     "b": [
      23.314,
      18.905
     ],
     "width_m": 0.85,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      22.889,
      18.905
     ],
     "facing_bearing_deg": 0,
     "facade": "N"
    },
    {
     "a": [
      24.262,
      0.0
     ],
     "b": [
      22.849,
      0.0
     ],
     "width_m": 1.41,
     "type_guess": "door / patio door",
     "parallel_frame_lines": 0,
     "mid": [
      23.556,
      0.0
     ],
     "facing_bearing_deg": 180,
     "facade": "S"
    },
    {
     "a": [
      24.691,
      18.905
     ],
     "b": [
      25.541,
      18.905
     ],
     "width_m": 0.85,
     "type_guess": "door / patio door",
     "parallel_frame_lines": 0,
     "mid": [
      25.116,
      18.905
     ],
     "facing_bearing_deg": 0,
     "facade": "N"
    },
    {
     "a": [
      26.894,
      3.199
     ],
     "b": [
      26.076,
      1.915
     ],
     "width_m": 1.52,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      26.485,
      2.557
     ],
     "facing_bearing_deg": 123,
     "facade": "SE"
    },
    {
     "a": [
      29.674,
      7.564
     ],
     "b": [
      28.857,
      6.28
     ],
     "width_m": 1.52,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      29.265,
      6.922
     ],
     "facing_bearing_deg": 122,
     "facade": "SE"
    },
    {
     "a": [
      32.103,
      15.51
     ],
     "b": [
      32.103,
      13.987
     ],
     "width_m": 1.52,
     "type_guess": "window",
     "parallel_frame_lines": 4,
     "mid": [
      32.103,
      14.748
     ],
     "facing_bearing_deg": 90,
     "facade": "E"
    },
    {
     "a": [
      32.103,
      19.222
     ],
     "b": [
      32.103,
      17.809
     ],
     "width_m": 1.41,
     "type_guess": "door / patio door",
     "parallel_frame_lines": 0,
     "mid": [
      32.103,
      18.516
     ],
     "facing_bearing_deg": 90,
     "facade": "E"
    }
   ],
   "labels": [
    {
     "text": "Lobby",
     "x": 21.396,
     "y": 11.8
    },
    {
     "text": "Bedroom",
     "x": 16.977,
     "y": 2.193
    },
    {
     "text": "Kitchen",
     "x": 20.907,
     "y": 5.775
    },
    {
     "text": "Bedroom",
     "x": 29.753,
     "y": 14.237
    },
    {
     "text": "Bath",
     "x": 20.556,
     "y": 7.493
    },
    {
     "text": "Bath",
     "x": 29.67,
     "y": 11.363
    },
    {
     "text": "Store",
     "x": 28.168,
     "y": 12.332
    },
    {
     "text": "Store",
     "x": 19.587,
     "y": 13.166
    },
    {
     "text": "Living",
     "x": 29.8,
     "y": 19.635
    },
    {
     "text": "Living",
     "x": 24.347,
     "y": 17.281
    },
    {
     "text": "Kitchen",
     "x": 24.196,
     "y": 13.454
    },
    {
     "text": "Bedroom",
     "x": 20.677,
     "y": 16.1
    },
    {
     "text": "Bath",
     "x": 19.599,
     "y": 11.502
    },
    {
     "text": "Living",
     "x": 20.469,
     "y": 1.617
    },
    {
     "text": "Stair A",
     "x": 14.087,
     "y": 1.141
    },
    {
     "text": "Stair B",
     "x": 17.242,
     "y": 17.685
    },
    {
     "text": "Kitchen",
     "x": 30.538,
     "y": 16.849
    },
    {
     "text": "Store",
     "x": 2.853,
     "y": 14.478
    },
    {
     "text": "Store",
     "x": 11.374,
     "y": 17.535
    },
    {
     "text": "Bath",
     "x": 1.531,
     "y": 13.632
    },
    {
     "text": "Bath",
     "x": 14.282,
     "y": 16.785
    },
    {
     "text": "Living",
     "x": 5.526,
     "y": 21.205
    },
    {
     "text": "Kitchen",
     "x": 8.58,
     "y": 17.349
    },
    {
     "text": "Living",
     "x": 5.327,
     "y": 8.133
    },
    {
     "text": "Kitchen",
     "x": 5.841,
     "y": 12.239
    },
    {
     "text": "Kitchen",
     "x": 8.795,
     "y": 11.511
    },
    {
     "text": "Store",
     "x": 8.305,
     "y": 13.145
    },
    {
     "text": "Store",
     "x": 16.869,
     "y": 7.764
    },
    {
     "text": "Bedroom",
     "x": 27.514,
     "y": 7.802
    },
    {
     "text": "Store",
     "x": 23.537,
     "y": 8.137
    },
    {
     "text": "Apt. 14",
     "x": 24.851,
     "y": 7.152
    },
    {
     "text": "Bath",
     "x": 23.519,
     "y": 6.575
    },
    {
     "text": "Living",
     "x": 23.564,
     "y": 1.812
    },
    {
     "text": "Kitchen",
     "x": 23.883,
     "y": 4.204
    },
    {
     "text": "Apt. 17",
     "x": 3.493,
     "y": 12.931
    },
    {
     "text": "Apt. 16",
     "x": 10.817,
     "y": 12.579
    },
    {
     "text": "Apt. 18",
     "x": 3.951,
     "y": 16.283
    },
    {
     "text": "Apt. 19",
     "x": 11.592,
     "y": 16.199
    },
    {
     "text": "Apt. 12",
     "x": 21.345,
     "y": 12.943
    },
    {
     "text": "Apt. 13",
     "x": 25.782,
     "y": 11.385
    },
    {
     "text": "Apt. 15",
     "x": 18.564,
     "y": 7.702
    },
    {
     "text": "Bath",
     "x": 1.523,
     "y": 16.591
    },
    {
     "text": "Bedroom",
     "x": 2.453,
     "y": 20.329
    },
    {
     "text": "Kitchen",
     "x": 5.718,
     "y": 17.696
    },
    {
     "text": "Store",
     "x": 6.341,
     "y": 16.023
    },
    {
     "text": "Bedroom",
     "x": 2.216,
     "y": 9.267
    },
    {
     "text": "Living",
     "x": 8.857,
     "y": 7.523
    },
    {
     "text": "Bedroom",
     "x": 13.608,
     "y": 19.969
    },
    {
     "text": "Bedroom",
     "x": 11.902,
     "y": 9.559
    },
    {
     "text": "Serv",
     "x": 13.429,
     "y": 7.199
    },
    {
     "text": "Living",
     "x": 9.137,
     "y": 21.04
    }
   ]
  }
 },
 "undercroft_car_park": {
  "description": "At ground floor the west wing (Apts 8-11 above) is open undercroft parking. Upper floors overhang it, supported on 0.40 x 0.40 m columns (plus the building walls on the east side).",
  "overhang_outline_upper_floors_west_wing": [
   [
    0,
    6.133
   ],
   [
    16.04,
    6.133
   ],
   [
    16.04,
    22.64
   ],
   [
    0,
    22.64
   ]
  ],
  "columns": [
   {
    "center": [
     3.699,
     6.334
    ],
    "size_m": [
     0.4,
     0.4
    ]
   },
   {
    "center": [
     0.198,
     6.334
    ],
    "size_m": [
     0.4,
     0.4
    ]
   },
   {
    "center": [
     0.198,
     12.035
    ],
    "size_m": [
     0.4,
     0.4
    ]
   },
   {
    "center": [
     10.962,
     12.035
    ],
    "size_m": [
     0.4,
     0.4
    ]
   },
   {
    "center": [
     3.699,
     12.035
    ],
    "size_m": [
     0.4,
     0.4
    ]
   },
   {
    "center": [
     10.962,
     17.235
    ],
    "size_m": [
     0.4,
     0.4
    ]
   },
   {
    "center": [
     3.699,
     17.235
    ],
    "size_m": [
     0.4,
     0.4
    ]
   },
   {
    "center": [
     0.198,
     17.235
    ],
    "size_m": [
     0.4,
     0.4
    ]
   },
   {
    "center": [
     10.962,
     22.436
    ],
    "size_m": [
     0.4,
     0.4
    ]
   },
   {
    "center": [
     3.699,
     22.436
    ],
    "size_m": [
     0.4,
     0.4
    ]
   },
   {
    "center": [
     0.198,
     22.436
    ],
    "size_m": [
     0.4,
     0.4
    ]
   }
  ]
 },
 "balconies": {
  "note": "From thin-line outlines on roof plan (balconies below). All 1.0 m deep, separated/flanked by 0.30 m brick fins. Present on first AND second floors (stacked). Ground floor equivalents shown dashed (balcony above) except Apt 2 (east) where a solid outline suggests a ground-level enclosure/terrace - unconfirmed.",
  "items": [
   {
    "serves": [
     "Apt 10",
     "Apt 18"
    ],
    "facade": "N",
    "polygon": [
     [
      3.739,
      22.631
     ],
     [
      7.041,
      22.631
     ],
     [
      7.041,
      23.629
     ],
     [
      3.739,
      23.629
     ]
    ]
   },
   {
    "serves": [
     "Apt 11",
     "Apt 19"
    ],
    "facade": "N",
    "polygon": [
     [
      7.338,
      22.631
     ],
     [
      10.64,
      22.631
     ],
     [
      10.64,
      23.629
     ],
     [
      7.338,
      23.629
     ]
    ]
   },
   {
    "serves": [
     "Apt 9",
     "Apt 17"
    ],
    "facade": "S",
    "polygon": [
     [
      3.739,
      5.129
     ],
     [
      7.041,
      5.129
     ],
     [
      7.041,
      6.128
     ],
     [
      3.739,
      6.128
     ]
    ]
   },
   {
    "serves": [
     "Apt 8",
     "Apt 16"
    ],
    "facade": "S",
    "polygon": [
     [
      7.338,
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     ],
     [
      10.125,
      5.129
     ],
     [
      10.125,
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     ],
     [
      7.338,
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     ]
    ]
   },
   {
    "serves": [
     "Apt 7",
     "Apt 15"
    ],
    "facade": "S",
    "polygon": [
     [
      18.838,
      -0.998
     ],
     [
      22.137,
      -0.998
     ],
     [
      22.137,
      0.0
     ],
     [
      18.838,
      0.0
     ]
    ]
   },
   {
    "serves": [
     "Apt 6",
     "Apt 14"
    ],
    "facade": "S",
    "polygon": [
     [
      22.437,
      -0.998
     ],
     [
      24.857,
      -0.998
     ],
     [
      24.857,
      0.0
     ],
     [
      22.437,
      0.0
     ]
    ]
   },
   {
    "serves": [
     "Apt 4",
     "Apt 12"
    ],
    "facade": "N",
    "polygon": [
     [
      24.088,
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     ],
     [
      27.386,
      18.905
     ],
     [
      27.386,
      19.904
     ],
     [
      24.088,
      19.904
     ]
    ]
   },
   {
    "serves": [
     "Apt 5",
     "Apt 13"
    ],
    "facade": "E",
    "polygon": [
     [
      32.103,
      16.782
     ],
     [
      33.101,
      16.782
     ],
     [
      33.101,
      20.084
     ],
     [
      32.103,
      20.084
     ]
    ]
   }
  ],
  "fins": [
   [
    [
     3.44,
     22.631
    ],
    [
     3.739,
     22.631
    ],
    [
     3.739,
     23.629
    ],
    [
     3.44,
     23.629
    ]
   ],
   [
    [
     7.041,
     22.631
    ],
    [
     7.338,
     22.631
    ],
    [
     7.338,
     23.629
    ],
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     7.041,
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    ]
   ],
   [
    [
     10.64,
     22.631
    ],
    [
     10.94,
     22.631
    ],
    [
     10.94,
     23.629
    ],
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     10.64,
     23.629
    ]
   ],
   [
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     3.44,
     5.129
    ],
    [
     3.739,
     5.129
    ],
    [
     3.739,
     6.128
    ],
    [
     3.44,
     6.128
    ]
   ],
   [
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     7.041,
     5.129
    ],
    [
     7.338,
     5.129
    ],
    [
     7.338,
     6.128
    ],
    [
     7.041,
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    ]
   ],
   [
    [
     10.125,
     5.129
    ],
    [
     10.425,
     5.129
    ],
    [
     10.425,
     6.128
    ],
    [
     10.125,
     6.128
    ]
   ],
   [
    [
     18.538,
     -0.998
    ],
    [
     18.838,
     -0.998
    ],
    [
     18.838,
     0.0
    ],
    [
     18.538,
     0.0
    ]
   ],
   [
    [
     22.137,
     -0.998
    ],
    [
     22.437,
     -0.998
    ],
    [
     22.437,
     0.0
    ],
    [
     22.137,
     0.0
    ]
   ],
   [
    [
     23.788,
     18.905
    ],
    [
     24.088,
     18.905
    ],
    [
     24.088,
     19.904
    ],
    [
     23.788,
     19.904
    ]
   ],
   [
    [
     32.103,
     16.478
    ],
    [
     33.101,
     16.478
    ],
    [
     33.101,
     16.782
    ],
    [
     32.103,
     16.782
    ]
   ]
  ]
 },
 "roof": {
  "type": "Flat roofs throughout (no pitches, ridges, hips or valleys). Grey stipple = roof finish. No PV panels or rooflights drawn.",
  "outline": [
   [
    0.0,
    22.631
   ],
   [
    16.041,
    22.631
   ],
   [
    16.041,
    18.905
   ],
   [
    27.386,
    18.905
   ],
   [
    27.386,
    20.479
   ],
   [
    32.103,
    20.479
   ],
   [
    32.103,
    11.377
   ],
   [
    24.857,
    0.0
   ],
   [
    12.488,
    0.0
   ],
   [
    12.488,
    6.128
   ],
   [
    0.0,
    6.128
   ]
  ],
  "zones": [
   {
    "name": "Main flat roof (west wing + central core)",
    "parapet_inner_line": "dashed, ~0.40 m inside outline",
    "note": "Remainder of outline after the two separately-parapeted blocks below"
   },
   {
    "name": "NE block flat roof (over Apts 5/13 column)",
    "outer": [
     [
      27.386,
      11.377
     ],
     [
      32.103,
      11.377
     ],
     [
      32.103,
      20.479
     ],
     [
      27.386,
      20.479
     ]
    ],
    "parapet_inner": [
     [
      27.788,
      11.776
     ],
     [
      31.701,
      11.776
     ],
     [
      31.701,
      20.084
     ],
     [
      27.788,
      20.084
     ]
    ],
    "note": "Separately parapeted (solid inner line); elevations show this as a distinct brick volume - height may differ"
   },
   {
    "name": "SE block flat roof (over Apts 6-7 / 14-15 / lounge)",
    "outer": [
     [
      12.488,
      0.0
     ],
     [
      24.857,
      0.0
     ],
     [
      24.857,
      10.456
     ],
     [
      12.488,
      10.456
     ]
    ],
    "parapet_inner": [
     [
      12.887,
      0.402
     ],
     [
      24.455,
      0.402
     ],
     [
      24.455,
      10.054
     ],
     [
      12.887,
      10.054
     ]
    ],
    "note": "Separately parapeted; front elevation shows a taller central brick volume - check elevations for exact parapet height"
   }
  ],
  "parapet_thickness_m": 0.4,
  "lift_overrun": {
   "polygon": [
    [
     15.741,
     10.477
    ],
    [
     17.988,
     10.477
    ],
    [
     17.988,
     12.827
    ],
    [
     15.741,
     12.827
    ]
   ],
   "size_m": [
    2.25,
    2.35
   ]
  },
  "vent_upstand": {
   "polygon": [
    [
     15.741,
     12.827
    ],
    [
     17.438,
     12.827
    ],
    [
     17.438,
     13.875
    ],
    [
     15.741,
     13.875
    ]
   ],
   "size_m": [
    1.7,
    1.05
   ]
  }
 }
}