{
 "ocl_version": "0.1.0",
 "name": "Jubilee Tower",
 "slug": "discovered-lane-54-0204-2-7189",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 17.12140374682747,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 395.0,
   "end_distance_m": 397.0,
   "start_elevation_m": 133.48134456070866,
   "end_elevation_m": 133.8237726356452,
   "min_gradient_pct": -11.059117142305297
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 16.64328944552646,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 387.0,
   "end_distance_m": 390.0,
   "start_elevation_m": 132.2087191812506,
   "end_elevation_m": 132.70801786461638,
   "min_gradient_pct": -10.837047209509857
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 16.372053788576864,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 388.0,
   "end_distance_m": 393.0,
   "start_elevation_m": 132.3665582736766,
   "end_elevation_m": 133.18516096310543,
   "min_gradient_pct": -10.573431967758893
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 16.150534543946264,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 387.0,
   "end_distance_m": 397.0,
   "start_elevation_m": 132.2087191812506,
   "end_elevation_m": 133.8237726356452,
   "min_gradient_pct": -10.36584000570599
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 15.68708136858362,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 387.0,
   "end_distance_m": 407.0,
   "start_elevation_m": 132.2087191812506,
   "end_elevation_m": 135.3461354549673,
   "min_gradient_pct": -9.649191473701677
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 15.637981077387963,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 387.0,
   "end_distance_m": 412.0,
   "start_elevation_m": 132.2087191812506,
   "end_elevation_m": 136.11821445059758,
   "min_gradient_pct": -9.035341393184922,
   "lateral_min_pct": 15.37,
   "lateral_max_pct": 15.71
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 14.655935248890557,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 375.0,
   "end_distance_m": 425.0,
   "start_elevation_m": 130.51701037618602,
   "end_elevation_m": 137.8449780006313,
   "min_gradient_pct": -7.194160173498517
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.618457912894796,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 762.0,
   "end_distance_m": 862.0,
   "start_elevation_m": 175.10790462001674,
   "end_elevation_m": 188.72636253291154,
   "min_gradient_pct": -4.2137165130063465
  }
 ],
 "shape": {
  "ascent_concentration": 0.364,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 231.0,
  "shape_class": "sustained"
 },
 "length_m": 1725.661526453681,
 "start_elevation_m": 93.79611916613698,
 "end_elevation_m": 227.92361169348362,
 "endpoint_gain_m": 134.12749252734665,
 "overall_gradient_pct": 7.772526099193113,
 "accumulated_ascent_m": 140.23410668885407,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 16.372053788576864,
   "start_distance_m": 388.0,
   "end_distance_m": 393.0,
   "midpoint_distance_m": 390.5,
   "start_elevation_m": 132.3665582736766,
   "end_elevation_m": 133.18516096310543,
   "start_xy": [
    352271.73004721664,
    459040.12898700323
   ],
   "end_xy": [
    352272.264765659,
    459035.15766160784
   ]
  },
  "max_10m": {
   "gradient_pct": 16.150534543946264,
   "start_distance_m": 387.0,
   "end_distance_m": 397.0,
   "midpoint_distance_m": 392.0,
   "start_elevation_m": 132.2087191812506,
   "end_elevation_m": 133.8237726356452,
   "start_xy": [
    352271.62310352817,
    459041.1232520823
   ],
   "end_xy": [
    352272.6925404129,
    459031.1806012915
   ]
  },
  "max_20m": {
   "gradient_pct": 15.68708136858362,
   "start_distance_m": 387.0,
   "end_distance_m": 407.0,
   "midpoint_distance_m": 397.0,
   "start_elevation_m": 132.2087191812506,
   "end_elevation_m": 135.3461354549673,
   "start_xy": [
    352271.62310352817,
    459041.1232520823
   ],
   "end_xy": [
    352273.76197729766,
    459021.23795050057
   ]
  },
  "max_25m": {
   "gradient_pct": 15.637981077387963,
   "start_distance_m": 387.0,
   "end_distance_m": 412.0,
   "midpoint_distance_m": 399.5,
   "start_elevation_m": 132.2087191812506,
   "end_elevation_m": 136.11821445059758,
   "start_xy": [
    352271.62310352817,
    459041.1232520823
   ],
   "end_xy": [
    352274.29669574,
    459016.2666251051
   ]
  },
  "max_50m": {
   "gradient_pct": 14.655935248890557,
   "start_distance_m": 375.0,
   "end_distance_m": 425.0,
   "midpoint_distance_m": 400.0,
   "start_elevation_m": 130.51701037618602,
   "end_elevation_m": 137.8449780006313,
   "start_xy": [
    352269.35272178473,
    459052.86602509243
   ],
   "end_xy": [
    352275.68696369015,
    459003.341179077
   ]
  },
  "max_100m": {
   "gradient_pct": 13.618457912894796,
   "start_distance_m": 762.0,
   "end_distance_m": 862.0,
   "midpoint_distance_m": 812.0,
   "start_elevation_m": 175.10790462001674,
   "end_elevation_m": 188.72636253291154,
   "start_xy": [
    352494.840084494,
    458789.15000168333
   ],
   "end_xy": [
    352583.688603029,
    458743.26010497793
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.573431967758893,
   "start_distance_m": 1703.0,
   "end_distance_m": 1708.0,
   "midpoint_distance_m": 1705.5,
   "start_elevation_m": 229.57420011448093,
   "end_elevation_m": 229.045528516093,
   "start_xy": [
    353263.7763058409,
    458313.47730194137
   ],
   "end_xy": [
    353266.6604827539,
    458309.39299985475
   ]
  },
  "min_10m": {
   "gradient_pct": -10.36584000570599,
   "start_distance_m": 1700.0,
   "end_distance_m": 1710.0,
   "midpoint_distance_m": 1705.0,
   "start_elevation_m": 229.8696364405177,
   "end_elevation_m": 228.8330524399471,
   "start_xy": [
    353262.0457996931,
    458315.9278831933
   ],
   "end_xy": [
    353267.8141535191,
    458307.75927902013
   ]
  },
  "min_20m": {
   "gradient_pct": -9.649191473701677,
   "start_distance_m": 1694.0,
   "end_distance_m": 1714.0,
   "midpoint_distance_m": 1704.0,
   "start_elevation_m": 230.3881916099529,
   "end_elevation_m": 228.45835331521258,
   "start_xy": [
    353258.47793241474,
    458320.738391642
   ],
   "end_xy": [
    353269.80152518017,
    458304.29103566863
   ]
  },
  "min_25m": {
   "gradient_pct": -9.035341393184922,
   "start_distance_m": 1692.0,
   "end_distance_m": 1717.0,
   "midpoint_distance_m": 1704.5,
   "start_elevation_m": 230.51980664897792,
   "end_elevation_m": 228.2609713006817,
   "start_xy": [
    353257.0540466905,
    458322.14286643505
   ],
   "end_xy": [
    353271.2556593818,
    458301.6670132366
   ]
  },
  "min_50m": {
   "gradient_pct": -7.194160173498517,
   "start_distance_m": 1671.0,
   "end_distance_m": 1721.0,
   "midpoint_distance_m": 1696.0,
   "start_elevation_m": 231.64999415047174,
   "end_elevation_m": 228.05291406372248,
   "start_xy": [
    353241.6514618954,
    458336.35665712686
   ],
   "end_xy": [
    353273.194504984,
    458298.1683166606
   ]
  },
  "min_100m": {
   "gradient_pct": -4.2137165130063465,
   "start_distance_m": 1625.0,
   "end_distance_m": 1725.0,
   "midpoint_distance_m": 1675.0,
   "start_elevation_m": 232.1353570463451,
   "end_elevation_m": 227.92164053333875,
   "start_xy": [
    353202.2921396744,
    458359.9684937483
   ],
   "end_xy": [
    353275.13335058617,
    458294.66962008463
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 17.12140374682747,
   "start_distance_m": 395.0,
   "end_distance_m": 397.0,
   "midpoint_distance_m": 396.0,
   "start_elevation_m": 133.48134456070866,
   "end_elevation_m": 133.8237726356452,
   "start_xy": [
    352272.47865303594,
    459033.16913144966
   ],
   "end_xy": [
    352272.6925404129,
    459031.1806012915
   ]
  },
  "max_3m": {
   "gradient_pct": 16.64328944552646,
   "start_distance_m": 387.0,
   "end_distance_m": 390.0,
   "midpoint_distance_m": 388.5,
   "start_elevation_m": 132.2087191812506,
   "end_elevation_m": 132.70801786461638,
   "start_xy": [
    352271.62310352817,
    459041.1232520823
   ],
   "end_xy": [
    352271.9439345936,
    459038.14045684505
   ]
  }
 },
 "diagnostic_note": "Windows <=3 m are at raster-noise scale (1-sigma raster noise alone is roughly +/-7 pp at 2 m and +/-5 pp at 3 m on a 1 m DTM). Diagnostic use only: never a headline or ranking value.",
 "quality_summary": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.013,
   "obstruction_max_height_m": 13.36,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "descends_at_end"
  ],
  "lateral_stability": {
   "offsets_m": [
    -1.0,
    -0.5,
    0.0,
    0.5,
    1.0
   ],
   "windows": [
    {
     "window_m": 25,
     "min_pct": 15.37,
     "max_pct": 15.71
    },
    {
     "window_m": 10,
     "min_pct": 15.82,
     "max_pct": 16.14
    },
    {
     "window_m": 5,
     "min_pct": 15.97,
     "max_pct": 16.42
    }
   ]
  }
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "sample_interval_m": 1.0,
  "interpolation": "bilinear",
  "smoothing": "none",
  "gradient_windows_m": [
   5.0,
   10.0,
   20.0,
   25.0,
   50.0,
   100.0
  ],
  "diagnostic_windows_m": [
   2.0,
   3.0
  ],
  "elevation_crs": "EPSG:27700",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/england/bulk_dtm_1m/SD5055.tif"
  ],
  "calculated_at": "2026-08-15T21:35:47+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12-roads.osm.pbf",
  "osm_snapshot": "2026-08-12T20:21:46Z",
  "elevation_provider": "Environment Agency",
  "elevation_dataset": "EA LIDAR Composite DTM 1m (2022)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Environment Agency",
  "elevation_coverage_id": "13787b9a-26a4-4775-8523-806d13af58fc__Lidar_Composite_Elevation_DTM_1m",
  "elevation_tile_ids": [
   "SD5055.tif"
  ],
  "climb_origin": "discovered",
  "naming_note": "Renamed from 'Discovered lane (54.0204, -2.7189)' under the identification-certain rule (2026-08-13 exception): route verified against the established feature by geometry in the 2026-08-28 fame-door review (fame-backfill-verdicts.csv).",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Quernmore",
  "county": "Lancashire"
 }
}