{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (51.6840, -2.2917)",
 "slug": "discovered-lane-51-6840-2-2917",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 42.17785922575246,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 730.0,
   "end_distance_m": 732.0,
   "start_elevation_m": 195.23664212582295,
   "end_elevation_m": 196.080199310338,
   "min_gradient_pct": -19.28556893888782,
   "suppressed_max_gradient_pct": 53.82432914484383,
   "suppressed_location_m": [
    558.0,
    560.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.61053190727921,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 729.0,
   "end_distance_m": 732.0,
   "start_elevation_m": 194.95188335311963,
   "end_elevation_m": 196.080199310338,
   "min_gradient_pct": -16.54946159088316,
   "suppressed_max_gradient_pct": 48.39407132195769,
   "suppressed_location_m": [
    557.0,
    560.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.62435130602614,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 727.0,
   "end_distance_m": 732.0,
   "start_elevation_m": 194.3489817450367,
   "end_elevation_m": 196.080199310338,
   "min_gradient_pct": -13.047892240170711,
   "suppressed_max_gradient_pct": 42.073610710600065,
   "suppressed_location_m": [
    550.0,
    555.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.767739056448818,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 622.0,
   "end_distance_m": 632.0,
   "start_elevation_m": 173.95799220468734,
   "end_elevation_m": 176.83476611033223,
   "min_gradient_pct": -11.03816352825703,
   "suppressed_max_gradient_pct": 40.42402918352167,
   "suppressed_location_m": [
    550.0,
    560.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.903896869950387,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 719.0,
   "end_distance_m": 739.0,
   "start_elevation_m": 192.61197068936846,
   "end_elevation_m": 197.79275006335854,
   "min_gradient_pct": -4.532479722153155,
   "suppressed_max_gradient_pct": 30.908644720029343,
   "suppressed_location_m": [
    546.0,
    566.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.983692647879593,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 714.0,
   "end_distance_m": 739.0,
   "start_elevation_m": 191.54682690138864,
   "end_elevation_m": 197.79275006335854,
   "min_gradient_pct": -1.3580521541997541,
   "suppressed_max_gradient_pct": 28.474178120192278,
   "suppressed_location_m": [
    541.0,
    566.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.724484891137482,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 689.0,
   "end_distance_m": 739.0,
   "start_elevation_m": 186.4305076177898,
   "end_elevation_m": 197.79275006335854,
   "min_gradient_pct": 2.4645754603670866,
   "suppressed_max_gradient_pct": 23.10377153948059,
   "suppressed_location_m": [
    531.0,
    581.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.321637238955816,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 651.0,
   "end_distance_m": 751.0,
   "start_elevation_m": 179.00051682914633,
   "end_elevation_m": 199.32215406810215,
   "min_gradient_pct": 4.030033904228475
  }
 ],
 "shape": {
  "ascent_concentration": 0.409,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 142.0,
  "shape_class": "sustained"
 },
 "length_m": 797.9999999999977,
 "start_elevation_m": 106.34606111618115,
 "end_elevation_m": 202.50179436886606,
 "endpoint_gain_m": 96.15573325268491,
 "overall_gradient_pct": 12.04959063316857,
 "accumulated_ascent_m": 99.41365393974029,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.62435130602614,
   "start_distance_m": 727.0,
   "end_distance_m": 732.0,
   "midpoint_distance_m": 729.5,
   "start_elevation_m": 194.3489817450367,
   "end_elevation_m": 196.080199310338,
   "start_xy": [
    380042.69742351706,
    197788.75880174493
   ],
   "end_xy": [
    380040.8454473541,
    197784.1144313296
   ]
  },
  "max_10m": {
   "gradient_pct": 28.767739056448818,
   "start_distance_m": 622.0,
   "end_distance_m": 632.0,
   "midpoint_distance_m": 627.0,
   "start_elevation_m": 173.95799220468734,
   "end_elevation_m": 176.83476611033223,
   "start_xy": [
    380093.4220687308,
    197879.5587617591
   ],
   "end_xy": [
    380087.31939243537,
    197871.63681016598
   ]
  },
  "max_20m": {
   "gradient_pct": 25.903896869950387,
   "start_distance_m": 719.0,
   "end_distance_m": 739.0,
   "midpoint_distance_m": 729.0,
   "start_elevation_m": 192.61197068936846,
   "end_elevation_m": 197.79275006335854,
   "start_xy": [
    380045.6597281796,
    197796.19013642936
   ],
   "end_xy": [
    380038.2527233657,
    197777.61229536042
   ]
  },
  "max_25m": {
   "gradient_pct": 24.983692647879593,
   "start_distance_m": 714.0,
   "end_distance_m": 739.0,
   "midpoint_distance_m": 726.5,
   "start_elevation_m": 191.54682690138864,
   "end_elevation_m": 197.79275006335854,
   "start_xy": [
    380047.5115086216,
    197800.8345851608
   ],
   "end_xy": [
    380038.2527233657,
    197777.61229536042
   ]
  },
  "max_50m": {
   "gradient_pct": 22.724484891137482,
   "start_distance_m": 689.0,
   "end_distance_m": 739.0,
   "midpoint_distance_m": 714.0,
   "start_elevation_m": 186.4305076177898,
   "end_elevation_m": 197.79275006335854,
   "start_xy": [
    380056.7697160145,
    197824.05710588503
   ],
   "end_xy": [
    380038.2527233657,
    197777.61229536042
   ]
  },
  "max_100m": {
   "gradient_pct": 20.321637238955816,
   "start_distance_m": 651.0,
   "end_distance_m": 751.0,
   "midpoint_distance_m": 701.0,
   "start_elevation_m": 179.00051682914633,
   "end_elevation_m": 199.32215406810215,
   "start_xy": [
    380075.7255341194,
    197856.58415577468
   ],
   "end_xy": [
    380033.80836396886,
    197766.46565263372
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -13.047892240170711,
   "start_distance_m": 68.0,
   "end_distance_m": 73.0,
   "midpoint_distance_m": 70.5,
   "start_elevation_m": 109.79162397166333,
   "end_elevation_m": 109.13922935965479,
   "start_xy": [
    379895.9708484796,
    198291.8147832307
   ],
   "end_xy": [
    379893.39131074573,
    198287.5315620123
   ]
  },
  "min_10m": {
   "gradient_pct": -11.03816352825703,
   "start_distance_m": 66.0,
   "end_distance_m": 76.0,
   "midpoint_distance_m": 71.0,
   "start_elevation_m": 109.93140917641868,
   "end_elevation_m": 108.82759282359298,
   "start_xy": [
    379897.0029267237,
    198293.5279131825
   ],
   "end_xy": [
    379891.84371145617,
    198284.9615556549
   ]
  },
  "min_20m": {
   "gradient_pct": -4.532479722153155,
   "start_distance_m": 57.0,
   "end_distance_m": 77.0,
   "midpoint_distance_m": 67.0,
   "start_elevation_m": 109.6181043235348,
   "end_elevation_m": 108.71160837910416,
   "start_xy": [
    379901.6463191487,
    198301.23757595214
   ],
   "end_xy": [
    379891.3318576901,
    198284.10335648552
   ]
  },
  "min_25m": {
   "gradient_pct": -1.3580521541997541,
   "start_distance_m": 56.0,
   "end_distance_m": 81.0,
   "midpoint_distance_m": 68.5,
   "start_elevation_m": 109.53891605279364,
   "end_elevation_m": 109.1994030142437,
   "start_xy": [
    379902.16214221914,
    198302.09427108875
   ],
   "end_xy": [
    379890.9810482022,
    198280.1244156167
   ]
  },
  "min_50m": {
   "gradient_pct": 2.4645754603670866,
   "start_distance_m": 57.0,
   "end_distance_m": 107.0,
   "midpoint_distance_m": 82.0,
   "start_elevation_m": 109.6181043235348,
   "end_elevation_m": 110.85039205371834,
   "start_xy": [
    379901.6463191487,
    198301.23757595214
   ],
   "end_xy": [
    379889.4710416005,
    198254.16830202265
   ]
  },
  "min_100m": {
   "gradient_pct": 4.030033904228475,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 106.34606111618115,
   "end_elevation_m": 110.37609502040962,
   "start_xy": [
    379943.39,
    198338.951
   ],
   "end_xy": [
    379889.877054116,
    198261.15651737447
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 42.17785922575246,
   "start_distance_m": 730.0,
   "end_distance_m": 732.0,
   "midpoint_distance_m": 731.0,
   "start_elevation_m": 195.23664212582295,
   "end_elevation_m": 196.080199310338,
   "start_xy": [
    380041.58646910597,
    197785.9720871437
   ],
   "end_xy": [
    380040.8454473541,
    197784.1144313296
   ]
  },
  "max_3m": {
   "gradient_pct": 37.61053190727921,
   "start_distance_m": 729.0,
   "end_distance_m": 732.0,
   "midpoint_distance_m": 730.5,
   "start_elevation_m": 194.95188335311963,
   "end_elevation_m": 196.080199310338,
   "start_xy": [
    380041.9566866304,
    197786.90103210704
   ],
   "end_xy": [
    380040.8454473541,
    197784.1144313296
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.008,
   "windows_resited": [
    2.0,
    3.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "placement_suppression": {
   "masked_fraction": 0.056,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.083,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 2,
   "windows_masked": [
    {
     "window_m": 10.0,
     "start_m": 545.0,
     "end_m": 555.0,
     "raw_pct": 31.08,
     "reason": "mask-edge"
    },
    {
     "window_m": 5.0,
     "start_m": 601.0,
     "end_m": 606.0,
     "raw_pct": 34.92,
     "reason": "mask-edge+short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.135,
   "obstruction_max_height_m": 22.49,
   "flagged_windows_m": [
    5,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    543.0,
    608.0
   ]
  ],
  "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/dtm_1m/E378000_N196000_2000m.tif",
   "data/cache/england/dtm_1m/E380000_N196000_2000m.tif",
   "data/cache/england/dtm_1m/E378000_N198000_2000m.tif",
   "data/cache/england/dtm_1m/E380000_N198000_2000m.tif"
  ],
  "calculated_at": "2026-09-15T04:25:58+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-27.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "retro-260914",
  "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": [
   "E378000_N196000_2000m.tif",
   "E380000_N196000_2000m.tif",
   "E378000_N198000_2000m.tif",
   "E380000_N198000_2000m.tif"
  ],
  "route_cut_m": 798.0,
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Uley",
  "county": "Gloucestershire"
 }
}