{
 "ocl_version": "0.1.0",
 "name": "Height Lane",
 "slug": "height-lane",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 28.372196039063624,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 210.0,
   "end_distance_m": 212.0,
   "start_elevation_m": 307.59867706221524,
   "end_elevation_m": 308.1661209829965,
   "min_gradient_pct": -14.371620446806332
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.855031694067065,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 33.0,
   "end_distance_m": 36.0,
   "start_elevation_m": 285.6188928908667,
   "end_elevation_m": 286.3945438416887,
   "min_gradient_pct": -15.121561596242827
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.63974396508638,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 31.0,
   "end_distance_m": 36.0,
   "start_elevation_m": 285.21255664343437,
   "end_elevation_m": 286.3945438416887,
   "min_gradient_pct": -13.040535831493116
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.092759117190894,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 30.0,
   "end_distance_m": 40.0,
   "start_elevation_m": 285.02396959214053,
   "end_elevation_m": 287.2332455038596,
   "min_gradient_pct": -4.95730749423501
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.56637765895431,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 31.0,
   "end_distance_m": 51.0,
   "start_elevation_m": 285.21255664343437,
   "end_elevation_m": 289.32583217522523,
   "min_gradient_pct": -2.449584347078826
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.193307207228372,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 31.0,
   "end_distance_m": 56.0,
   "start_elevation_m": 285.21255664343437,
   "end_elevation_m": 290.26088344524146,
   "min_gradient_pct": -2.0702102145030494
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.727959385798044,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 31.0,
   "end_distance_m": 81.0,
   "start_elevation_m": 285.21255664343437,
   "end_elevation_m": 294.5765363363334,
   "min_gradient_pct": -1.683376125639029
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.97450203549164,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 24.0,
   "end_distance_m": 124.0,
   "start_elevation_m": 284.20192940893077,
   "end_elevation_m": 300.1764314444224,
   "min_gradient_pct": -0.6972828510934619
  }
 ],
 "shape": {
  "ascent_concentration": 0.53,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 98.0,
  "shape_class": "stepped"
 },
 "length_m": 1160.0768304022945,
 "start_elevation_m": 283.0148801782325,
 "end_elevation_m": 336.8073206710822,
 "endpoint_gain_m": 53.79244049284972,
 "overall_gradient_pct": 4.636972231761187,
 "accumulated_ascent_m": 58.57854026918818,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.63974396508638,
   "start_distance_m": 31.0,
   "end_distance_m": 36.0,
   "midpoint_distance_m": 33.5,
   "start_elevation_m": 285.21255664343437,
   "end_elevation_m": 286.3945438416887,
   "start_xy": [
    403861.0024809961,
    434671.43496139295
   ],
   "end_xy": [
    403865.5552729837,
    434669.3680607228
   ]
  },
  "max_10m": {
   "gradient_pct": 22.092759117190894,
   "start_distance_m": 30.0,
   "end_distance_m": 40.0,
   "midpoint_distance_m": 35.0,
   "start_elevation_m": 285.02396959214053,
   "end_elevation_m": 287.2332455038596,
   "start_xy": [
    403860.0917068043,
    434671.8478661798
   ],
   "end_xy": [
    403869.1976634271,
    434667.7148858448
   ]
  },
  "max_20m": {
   "gradient_pct": 20.56637765895431,
   "start_distance_m": 31.0,
   "end_distance_m": 51.0,
   "midpoint_distance_m": 41.0,
   "start_elevation_m": 285.21255664343437,
   "end_elevation_m": 289.32583217522523,
   "start_xy": [
    403861.0024809961,
    434671.43496139295
   ],
   "end_xy": [
    403879.214224215,
    434663.1686258781
   ]
  },
  "max_25m": {
   "gradient_pct": 20.193307207228372,
   "start_distance_m": 31.0,
   "end_distance_m": 56.0,
   "midpoint_distance_m": 43.5,
   "start_elevation_m": 285.21255664343437,
   "end_elevation_m": 290.26088344524146,
   "start_xy": [
    403861.0024809961,
    434671.43496139295
   ],
   "end_xy": [
    403883.7275603571,
    434661.0187147204
   ]
  },
  "max_50m": {
   "gradient_pct": 18.727959385798044,
   "start_distance_m": 31.0,
   "end_distance_m": 81.0,
   "midpoint_distance_m": 56.0,
   "start_elevation_m": 285.21255664343437,
   "end_elevation_m": 294.5765363363334,
   "start_xy": [
    403861.0024809961,
    434671.43496139295
   ],
   "end_xy": [
    403908.1985162176,
    434660.0277690234
   ]
  },
  "max_100m": {
   "gradient_pct": 15.97450203549164,
   "start_distance_m": 24.0,
   "end_distance_m": 124.0,
   "midpoint_distance_m": 74.0,
   "start_elevation_m": 284.20192940893077,
   "end_elevation_m": 300.1764314444224,
   "start_xy": [
    403854.628139824,
    434674.3276698712
   ],
   "end_xy": [
    403948.80979109136,
    434648.32956767787
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -13.040535831493116,
   "start_distance_m": 127.0,
   "end_distance_m": 132.0,
   "midpoint_distance_m": 129.5,
   "start_elevation_m": 300.3524469726003,
   "end_elevation_m": 299.70042018102566,
   "start_xy": [
    403951.4735993041,
    434646.94966702716
   ],
   "end_xy": [
    403955.9130541603,
    434644.64939755865
   ]
  },
  "min_10m": {
   "gradient_pct": -4.95730749423501,
   "start_distance_m": 1142.0,
   "end_distance_m": 1152.0,
   "midpoint_distance_m": 1147.0,
   "start_elevation_m": 336.90408009427557,
   "end_elevation_m": 336.40834934485207,
   "start_xy": [
    404268.86973723694,
    435048.4825160546
   ],
   "end_xy": [
    404278.8528201846,
    435049.0637587285
   ]
  },
  "min_20m": {
   "gradient_pct": -2.449584347078826,
   "start_distance_m": 1132.0,
   "end_distance_m": 1152.0,
   "midpoint_distance_m": 1142.0,
   "start_elevation_m": 336.89826621426784,
   "end_elevation_m": 336.40834934485207,
   "start_xy": [
    404258.88599461806,
    435047.91253075475
   ],
   "end_xy": [
    404278.8528201846,
    435049.0637587285
   ]
  },
  "min_25m": {
   "gradient_pct": -2.0702102145030494,
   "start_distance_m": 1127.0,
   "end_distance_m": 1152.0,
   "midpoint_distance_m": 1139.5,
   "start_elevation_m": 336.92590189847783,
   "end_elevation_m": 336.40834934485207,
   "start_xy": [
    404253.89418201847,
    435047.62651789293
   ],
   "end_xy": [
    404278.8528201846,
    435049.0637587285
   ]
  },
  "min_50m": {
   "gradient_pct": -1.683376125639029,
   "start_distance_m": 313.0,
   "end_distance_m": 363.0,
   "midpoint_distance_m": 338.0,
   "start_elevation_m": 312.6101169760554,
   "end_elevation_m": 311.7684289132359,
   "start_xy": [
    404131.2156371497,
    434604.11684315116
   ],
   "end_xy": [
    404171.50283017225,
    434574.524411856
   ]
  },
  "min_100m": {
   "gradient_pct": -0.6972828510934619,
   "start_distance_m": 288.0,
   "end_distance_m": 388.0,
   "midpoint_distance_m": 338.0,
   "start_elevation_m": 312.23177779633454,
   "end_elevation_m": 311.5344949452411,
   "start_xy": [
    404107.8047311921,
    434612.3776312622
   ],
   "end_xy": [
    404191.64430644736,
    434559.8367307797
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 28.372196039063624,
   "start_distance_m": 210.0,
   "end_distance_m": 212.0,
   "midpoint_distance_m": 211.0,
   "start_elevation_m": 307.59867706221524,
   "end_elevation_m": 308.1661209829965,
   "start_xy": [
    404031.1962455787,
    434627.0393848651
   ],
   "end_xy": [
    404033.16115828796,
    434626.66640138195
   ]
  },
  "max_3m": {
   "gradient_pct": 25.855031694067065,
   "start_distance_m": 33.0,
   "end_distance_m": 36.0,
   "midpoint_distance_m": 34.5,
   "start_elevation_m": 285.6188928908667,
   "end_elevation_m": 286.3945438416887,
   "start_xy": [
    403862.8234892816,
    434670.6079625568
   ],
   "end_xy": [
    403865.5552729837,
    434669.3680607228
   ]
  }
 },
 "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": 0.0,
   "obstruction_max_height_m": 1.28,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": []
 },
 "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/SE0030.tif",
   "data/cache/england/bulk_dtm_1m/SE0035.tif"
  ],
  "calculated_at": "2026-08-19T18:36:11+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12.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": [
   "SE0030.tif",
   "SE0035.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 12.1% over 200 m (Terrain 50), gain 29.0 m over 393 m way. EXTENDED by graph walk: +0 segment(s) at base, +4 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (England launch slice 2026-08-16): clean-steep."
 },
 "area": {
  "place": "Oxenhope",
  "county": ""
 }
}