{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.8876, -3.9249)",
 "slug": "discovered-lane-50-8876-3-9249",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 49.560176249804755,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 462.0,
   "end_distance_m": 464.0,
   "start_elevation_m": 122.14789068575453,
   "end_elevation_m": 123.13909421075063,
   "min_gradient_pct": -28.542887391788696
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 43.86889388327688,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 461.0,
   "end_distance_m": 464.0,
   "start_elevation_m": 121.82302739425232,
   "end_elevation_m": 123.13909421075063,
   "min_gradient_pct": -20.070571915142448
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 39.34980795006226,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 438.0,
   "end_distance_m": 443.0,
   "start_elevation_m": 117.15921662794041,
   "end_elevation_m": 119.12670702544352,
   "min_gradient_pct": -16.32934178404497
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.996186141103465,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 438.0,
   "end_distance_m": 448.0,
   "start_elevation_m": 117.15921662794041,
   "end_elevation_m": 120.15883524205076,
   "min_gradient_pct": -13.95190474051276
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.197927913259022,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 393.0,
   "end_distance_m": 413.0,
   "start_elevation_m": 108.59820731276099,
   "end_elevation_m": 113.2377928954128,
   "min_gradient_pct": -11.313396222372845
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.837564147794183,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 439.0,
   "end_distance_m": 464.0,
   "start_elevation_m": 117.42970317380208,
   "end_elevation_m": 123.13909421075063,
   "min_gradient_pct": -9.706574490940739
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.23884386715619,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 394.0,
   "end_distance_m": 444.0,
   "start_elevation_m": 108.7676541666483,
   "end_elevation_m": 119.3870761002264,
   "min_gradient_pct": -7.9772704701652515
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.046935459806065,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 366.0,
   "end_distance_m": 466.0,
   "start_elevation_m": 104.54066664126968,
   "end_elevation_m": 123.58760210107575,
   "min_gradient_pct": -4.20958453005376
  }
 ],
 "shape": {
  "ascent_concentration": 0.672,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 199.0,
  "shape_class": "stepped"
 },
 "length_m": 1503.532591841593,
 "start_elevation_m": 93.13416594619716,
 "end_elevation_m": 154.67456432372998,
 "endpoint_gain_m": 61.540398377532824,
 "overall_gradient_pct": 4.093053832784258,
 "accumulated_ascent_m": 76.56628241490101,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 39.34980795006226,
   "start_distance_m": 438.0,
   "end_distance_m": 443.0,
   "midpoint_distance_m": 440.5,
   "start_elevation_m": 117.15921662794041,
   "end_elevation_m": 119.12670702544352,
   "start_xy": [
    263716.28360010555,
    111399.472556326
   ],
   "end_xy": [
    263721.2462895265,
    111398.86287303844
   ]
  },
  "max_10m": {
   "gradient_pct": 29.996186141103465,
   "start_distance_m": 438.0,
   "end_distance_m": 448.0,
   "midpoint_distance_m": 443.0,
   "start_elevation_m": 117.15921662794041,
   "end_elevation_m": 120.15883524205076,
   "start_xy": [
    263716.28360010555,
    111399.472556326
   ],
   "end_xy": [
    263726.2089789475,
    111398.25318975087
   ]
  },
  "max_20m": {
   "gradient_pct": 23.197927913259022,
   "start_distance_m": 393.0,
   "end_distance_m": 413.0,
   "midpoint_distance_m": 403.0,
   "start_elevation_m": 108.59820731276099,
   "end_elevation_m": 113.2377928954128,
   "start_xy": [
    263673.10163248103,
    111387.64477523555
   ],
   "end_xy": [
    263692.1427473175,
    111393.52477615818
   ]
  },
  "max_25m": {
   "gradient_pct": 22.837564147794183,
   "start_distance_m": 439.0,
   "end_distance_m": 464.0,
   "midpoint_distance_m": 451.5,
   "start_elevation_m": 117.42970317380208,
   "end_elevation_m": 123.13909421075063,
   "start_xy": [
    263717.2761379897,
    111399.35061966849
   ],
   "end_xy": [
    263742.08958509454,
    111396.30220323065
   ]
  },
  "max_50m": {
   "gradient_pct": 21.23884386715619,
   "start_distance_m": 394.0,
   "end_distance_m": 444.0,
   "midpoint_distance_m": 419.0,
   "start_elevation_m": 108.7676541666483,
   "end_elevation_m": 119.3870761002264,
   "start_xy": [
    263673.9518982422,
    111388.17112885758
   ],
   "end_xy": [
    263722.2388274107,
    111398.74093638093
   ]
  },
  "max_100m": {
   "gradient_pct": 19.046935459806065,
   "start_distance_m": 366.0,
   "end_distance_m": 466.0,
   "midpoint_distance_m": 416.0,
   "start_elevation_m": 104.54066664126968,
   "end_elevation_m": 123.58760210107575,
   "start_xy": [
    263650.14445693005,
    111373.43322744081
   ],
   "end_xy": [
    263744.0746608629,
    111396.05832991563
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -16.32934178404497,
   "start_distance_m": 207.0,
   "end_distance_m": 212.0,
   "midpoint_distance_m": 209.5,
   "start_elevation_m": 93.52552188795148,
   "end_elevation_m": 92.70905479874924,
   "start_xy": [
    263559.97967712436,
    111259.76708700074
   ],
   "end_xy": [
    263560.48864846816,
    111264.74068826127
   ]
  },
  "min_10m": {
   "gradient_pct": -13.95190474051276,
   "start_distance_m": 246.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 251.0,
   "start_elevation_m": 90.97471299961205,
   "end_elevation_m": 89.57952252556078,
   "start_xy": [
    263563.4252159709,
    111298.61363574598
   ],
   "end_xy": [
    263564.3119982128,
    111308.57120583543
   ]
  },
  "min_20m": {
   "gradient_pct": -11.313396222372845,
   "start_distance_m": 236.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 246.0,
   "start_elevation_m": 91.84220177003535,
   "end_elevation_m": 89.57952252556078,
   "start_xy": [
    263562.5615196466,
    111288.65100413283
   ],
   "end_xy": [
    263564.3119982128,
    111308.57120583543
   ]
  },
  "min_25m": {
   "gradient_pct": -9.706574490940739,
   "start_distance_m": 233.0,
   "end_distance_m": 258.0,
   "midpoint_distance_m": 245.5,
   "start_elevation_m": 91.98644189329335,
   "end_elevation_m": 89.55979827055816,
   "start_xy": [
    263562.3024107493,
    111285.66221464888
   ],
   "end_xy": [
    263564.98874349793,
    111310.4532302293
   ]
  },
  "min_50m": {
   "gradient_pct": -7.9772704701652515,
   "start_distance_m": 206.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 231.0,
   "start_elevation_m": 93.5681577606434,
   "end_elevation_m": 89.57952252556078,
   "start_xy": [
    263559.8669997948,
    111258.7734553691
   ],
   "end_xy": [
    263564.3119982128,
    111308.57120583543
   ]
  },
  "min_100m": {
   "gradient_pct": -4.20958453005376,
   "start_distance_m": 171.0,
   "end_distance_m": 271.0,
   "midpoint_distance_m": 221.0,
   "start_elevation_m": 93.6462598074627,
   "end_elevation_m": 89.43667527740894,
   "start_xy": [
    263555.92329326115,
    111223.99634826145
   ],
   "end_xy": [
    263570.4649920277,
    111321.99126809389
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 49.560176249804755,
   "start_distance_m": 462.0,
   "end_distance_m": 464.0,
   "midpoint_distance_m": 463.0,
   "start_elevation_m": 122.14789068575453,
   "end_elevation_m": 123.13909421075063,
   "start_xy": [
    263740.1045093261,
    111396.54607654568
   ],
   "end_xy": [
    263742.08958509454,
    111396.30220323065
   ]
  },
  "max_3m": {
   "gradient_pct": 43.86889388327688,
   "start_distance_m": 461.0,
   "end_distance_m": 464.0,
   "midpoint_distance_m": 462.5,
   "start_elevation_m": 121.82302739425232,
   "end_elevation_m": 123.13909421075063,
   "start_xy": [
    263739.11197144195,
    111396.66801320319
   ],
   "end_xy": [
    263742.08958509454,
    111396.30220323065
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.041,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.322,
   "obstruction_max_height_m": 19.45,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    90.0,
    120.0
   ],
   [
    230.0,
    260.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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/SS6010.tif"
  ],
  "calculated_at": "2026-09-05T02:11:53+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106792346/hunt-gb/regions/region-04.osm.pbf",
  "osm_snapshot": "",
  "run_id": "hunt-england-260905",
  "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": [
   "SS6010.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Hollocombe",
  "county": "Devon"
 }
}