{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (54.3129, -3.1900)",
 "slug": "discovered-lane-54-3129-3-1900",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 47.38045606832273,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 626.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 99.62504688596549,
   "end_elevation_m": 100.57265600733194,
   "min_gradient_pct": -48.09020905557517
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 42.07862965893364,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 481.0,
   "end_distance_m": 484.0,
   "start_elevation_m": 81.05174093811443,
   "end_elevation_m": 82.31409982788244,
   "min_gradient_pct": -33.465302849293245
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 37.245363022089464,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 623.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 98.71038785622747,
   "end_elevation_m": 100.57265600733194,
   "min_gradient_pct": -10.35380171717975
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 30.023984041741443,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 618.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 97.5702576031578,
   "end_elevation_m": 100.57265600733194,
   "min_gradient_pct": -2.363196860265333
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.419805817476345,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 608.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 95.88869484383667,
   "end_elevation_m": 100.57265600733194,
   "min_gradient_pct": 2.2276980654407197
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.08413930046015,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 610.0,
   "end_distance_m": 635.0,
   "start_elevation_m": 96.25624754098374,
   "end_elevation_m": 101.77728236609877,
   "min_gradient_pct": 2.339680378442978
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.010073153485024,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 434.0,
   "end_distance_m": 484.0,
   "start_elevation_m": 73.30906325113993,
   "end_elevation_m": 82.31409982788244,
   "min_gradient_pct": 2.627685721105351
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.38338307663217,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 385.0,
   "end_distance_m": 485.0,
   "start_elevation_m": 65.37594209995217,
   "end_elevation_m": 82.75932517658434,
   "min_gradient_pct": 3.19125297234762
  }
 ],
 "shape": {
  "ascent_concentration": 0.351,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 131.0,
  "shape_class": "sustained"
 },
 "length_m": 1180.0000000000125,
 "start_elevation_m": 39.59865383282504,
 "end_elevation_m": 163.48781766403212,
 "endpoint_gain_m": 123.88916383120707,
 "overall_gradient_pct": 10.499081680610658,
 "accumulated_ascent_m": 128.22044540003034,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 37.245363022089464,
   "start_distance_m": 623.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 625.5,
   "start_elevation_m": 98.71038785622747,
   "end_elevation_m": 100.57265600733194,
   "start_xy": [
    322428.1236396258,
    491218.8151415347
   ],
   "end_xy": [
    322429.359115484,
    491223.66009761335
   ]
  },
  "max_10m": {
   "gradient_pct": 30.023984041741443,
   "start_distance_m": 618.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 623.0,
   "start_elevation_m": 97.5702576031578,
   "end_elevation_m": 100.57265600733194,
   "start_xy": [
    322426.88816376764,
    491213.9701854561
   ],
   "end_xy": [
    322429.359115484,
    491223.66009761335
   ]
  },
  "max_20m": {
   "gradient_pct": 23.419805817476345,
   "start_distance_m": 608.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 618.0,
   "start_elevation_m": 95.88869484383667,
   "end_elevation_m": 100.57265600733194,
   "start_xy": [
    322422.3189021623,
    491206.03270950733
   ],
   "end_xy": [
    322429.359115484,
    491223.66009761335
   ]
  },
  "max_25m": {
   "gradient_pct": 22.08413930046015,
   "start_distance_m": 610.0,
   "end_distance_m": 635.0,
   "midpoint_distance_m": 622.5,
   "start_elevation_m": 96.25624754098374,
   "end_elevation_m": 101.77728236609877,
   "start_xy": [
    322424.1377992618,
    491206.86434244417
   ],
   "end_xy": [
    322430.62348891166,
    491230.52453464275
   ]
  },
  "max_50m": {
   "gradient_pct": 18.010073153485024,
   "start_distance_m": 434.0,
   "end_distance_m": 484.0,
   "midpoint_distance_m": 459.0,
   "start_elevation_m": 73.30906325113993,
   "end_elevation_m": 82.31409982788244,
   "start_xy": [
    322387.77132626204,
    491106.1861914689
   ],
   "end_xy": [
    322383.5604969807,
    491155.52380925725
   ]
  },
  "max_100m": {
   "gradient_pct": 17.38338307663217,
   "start_distance_m": 385.0,
   "end_distance_m": 485.0,
   "midpoint_distance_m": 435.0,
   "start_elevation_m": 65.37594209995217,
   "end_elevation_m": 82.75932517658434,
   "start_xy": [
    322409.2870651438,
    491062.3302674449
   ],
   "end_xy": [
    322383.5406721746,
    491156.5236127265
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.35380171717975,
   "start_distance_m": 485.0,
   "end_distance_m": 490.0,
   "midpoint_distance_m": 487.5,
   "start_elevation_m": 82.75932517658434,
   "end_elevation_m": 82.24163509072535,
   "start_xy": [
    322383.5406721746,
    491156.5236127265
   ],
   "end_xy": [
    322383.44154814415,
    491161.52263007255
   ]
  },
  "min_10m": {
   "gradient_pct": -2.363196860265333,
   "start_distance_m": 486.0,
   "end_distance_m": 496.0,
   "midpoint_distance_m": 491.0,
   "start_elevation_m": 82.71717027221705,
   "end_elevation_m": 82.48085058619051,
   "start_xy": [
    322383.5208473685,
    491157.5234161957
   ],
   "end_xy": [
    322383.32259930763,
    491167.5214508879
   ]
  },
  "min_20m": {
   "gradient_pct": 2.2276980654407197,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 39.59865383282504,
   "end_elevation_m": 40.04419344591319,
   "start_xy": [
    322270.766,
    490776.444
   ],
   "end_xy": [
    322270.7114030302,
    490796.36655413074
   ]
  },
  "min_25m": {
   "gradient_pct": 2.339680378442978,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 39.59865383282504,
   "end_elevation_m": 40.18357392743579,
   "start_xy": [
    322270.766,
    490776.444
   ],
   "end_xy": [
    322271.3369176022,
    490801.32727298193
   ]
  },
  "min_50m": {
   "gradient_pct": 2.627685721105351,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 39.59865383282504,
   "end_elevation_m": 40.91249669337772,
   "start_xy": [
    322270.766,
    490776.444
   ],
   "end_xy": [
    322278.3403097555,
    490825.2462828387
   ]
  },
  "min_100m": {
   "gradient_pct": 3.19125297234762,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 39.59865383282504,
   "end_elevation_m": 42.78990680517266,
   "start_xy": [
    322270.766,
    490776.444
   ],
   "end_xy": [
    322293.80463405227,
    490872.6704731554
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 47.38045606832273,
   "start_distance_m": 626.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 627.0,
   "start_elevation_m": 99.62504688596549,
   "end_elevation_m": 100.57265600733194,
   "start_xy": [
    322428.8649251407,
    491221.7221151819
   ],
   "end_xy": [
    322429.359115484,
    491223.66009761335
   ]
  },
  "max_3m": {
   "gradient_pct": 42.07862965893364,
   "start_distance_m": 481.0,
   "end_distance_m": 484.0,
   "midpoint_distance_m": 482.5,
   "start_elevation_m": 81.05174093811443,
   "end_elevation_m": 82.31409982788244,
   "start_xy": [
    322383.6199713989,
    491152.5243988496
   ],
   "end_xy": [
    322383.5604969807,
    491155.52380925725
   ]
  }
 },
 "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": 0.159,
   "obstruction_max_height_m": 22.69,
   "flagged_windows_m": [
    2,
    5,
    10,
    20,
    25
   ]
  },
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "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/SD2090.tif"
  ],
  "calculated_at": "2026-09-03T23:07:34+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",
  "run_id": "extent-trim-v2-260903",
  "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": [
   "SD2090.tif"
  ],
  "route_cut_m": 1180.0,
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Broughton Mills",
  "county": "Westmorland and Furness"
 }
}