{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (51.8356, -2.4859)",
 "slug": "discovered-lane-51-8356-2-4859",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.34532707248246,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 72.0,
   "end_distance_m": 74.0,
   "start_elevation_m": 222.33660857459046,
   "end_elevation_m": 223.1435151160401,
   "min_gradient_pct": -34.04576842408318,
   "suppressed_max_gradient_pct": 85.51143926893303,
   "suppressed_location_m": [
    664.0,
    666.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.462422004063875,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 71.0,
   "end_distance_m": 74.0,
   "start_elevation_m": 222.0796424559182,
   "end_elevation_m": 223.1435151160401,
   "min_gradient_pct": -31.791794760455144,
   "suppressed_max_gradient_pct": 69.47131558555479,
   "suppressed_location_m": [
    663.0,
    666.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.06356962738346,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 69.0,
   "end_distance_m": 74.0,
   "start_elevation_m": 221.59033663467093,
   "end_elevation_m": 223.1435151160401,
   "min_gradient_pct": -25.04960871584501,
   "suppressed_max_gradient_pct": 48.62089933705761,
   "suppressed_location_m": [
    661.0,
    666.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.12421708902184,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 65.0,
   "end_distance_m": 75.0,
   "start_elevation_m": 220.6017707259943,
   "end_elevation_m": 223.31419243489648,
   "min_gradient_pct": -18.317297007684488,
   "suppressed_max_gradient_pct": 30.474868376322206,
   "suppressed_location_m": [
    657.0,
    667.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.803628186781197,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 66.0,
   "end_distance_m": 86.0,
   "start_elevation_m": 220.79012106897395,
   "end_elevation_m": 225.15084670633019,
   "min_gradient_pct": -10.244413253607831
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.847208762613036,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 65.0,
   "end_distance_m": 90.0,
   "start_elevation_m": 220.6017707259943,
   "end_elevation_m": 225.81357291664756,
   "min_gradient_pct": -8.405218359659784
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.371296373704354,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 55.0,
   "end_distance_m": 105.0,
   "start_elevation_m": 219.226977720565,
   "end_elevation_m": 227.91262590741718,
   "min_gradient_pct": -3.4555044160011334
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.218893945693878,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 48.0,
   "end_distance_m": 148.0,
   "start_elevation_m": 218.62287214137774,
   "end_elevation_m": 233.84176608707162,
   "min_gradient_pct": 0.2592075687118154
  }
 ],
 "shape": {
  "ascent_concentration": 0.455,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 103.0,
  "shape_class": "stepped"
 },
 "length_m": 668.8276930387024,
 "start_elevation_m": 215.16880400683738,
 "end_elevation_m": 255.32502460205805,
 "endpoint_gain_m": 40.156220595220674,
 "overall_gradient_pct": 6.003970979846523,
 "accumulated_ascent_m": 43.47230079546034,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.06356962738346,
   "start_distance_m": 69.0,
   "end_distance_m": 74.0,
   "midpoint_distance_m": 71.5,
   "start_elevation_m": 221.59033663467093,
   "end_elevation_m": 223.1435151160401,
   "start_xy": [
    366533.7586743681,
    215299.56321452334
   ],
   "end_xy": [
    366529.67662711325,
    215296.67584717408
   ]
  },
  "max_10m": {
   "gradient_pct": 27.12421708902184,
   "start_distance_m": 65.0,
   "end_distance_m": 75.0,
   "midpoint_distance_m": 70.0,
   "start_elevation_m": 220.6017707259943,
   "end_elevation_m": 223.31419243489648,
   "start_xy": [
    366537.0243121719,
    215301.8731084027
   ],
   "end_xy": [
    366528.8602176623,
    215296.09837370424
   ]
  },
  "max_20m": {
   "gradient_pct": 21.803628186781197,
   "start_distance_m": 66.0,
   "end_distance_m": 86.0,
   "midpoint_distance_m": 76.0,
   "start_elevation_m": 220.79012106897395,
   "end_elevation_m": 225.15084670633019,
   "start_xy": [
    366536.20790272095,
    215301.29563493287
   ],
   "end_xy": [
    366519.8797137017,
    215289.7461655359
   ]
  },
  "max_25m": {
   "gradient_pct": 20.847208762613036,
   "start_distance_m": 65.0,
   "end_distance_m": 90.0,
   "midpoint_distance_m": 77.5,
   "start_elevation_m": 220.6017707259943,
   "end_elevation_m": 225.81357291664756,
   "start_xy": [
    366537.0243121719,
    215301.8731084027
   ],
   "end_xy": [
    366516.61407589784,
    215287.4362716565
   ]
  },
  "max_50m": {
   "gradient_pct": 17.371296373704354,
   "start_distance_m": 55.0,
   "end_distance_m": 105.0,
   "midpoint_distance_m": 80.0,
   "start_elevation_m": 219.226977720565,
   "end_elevation_m": 227.91262590741718,
   "start_xy": [
    366545.1884066815,
    215307.6478431012
   ],
   "end_xy": [
    366504.05090902955,
    215279.27450003583
   ]
  },
  "max_100m": {
   "gradient_pct": 15.218893945693878,
   "start_distance_m": 48.0,
   "end_distance_m": 148.0,
   "midpoint_distance_m": 98.0,
   "start_elevation_m": 218.62287214137774,
   "end_elevation_m": 233.84176608707162,
   "start_xy": [
    366550.9032728383,
    215311.69015739014
   ],
   "end_xy": [
    366472.9895243635,
    215250.6072833469
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -25.04960871584501,
   "start_distance_m": 238.0,
   "end_distance_m": 243.0,
   "midpoint_distance_m": 240.5,
   "start_elevation_m": 235.40227895843122,
   "end_elevation_m": 234.14979852263897,
   "start_xy": [
    366438.58144659013,
    215169.6320480907
   ],
   "end_xy": [
    366438.9151850719,
    215164.64319866165
   ]
  },
  "min_10m": {
   "gradient_pct": -18.317297007684488,
   "start_distance_m": 235.0,
   "end_distance_m": 245.0,
   "midpoint_distance_m": 240.0,
   "start_elevation_m": 235.58063623034263,
   "end_elevation_m": 233.74890652957419,
   "start_xy": [
    366438.38120350114,
    215172.62535774813
   ],
   "end_xy": [
    366439.04868046456,
    215162.64765889003
   ]
  },
  "min_20m": {
   "gradient_pct": -10.244413253607831,
   "start_distance_m": 225.0,
   "end_distance_m": 245.0,
   "midpoint_distance_m": 235.0,
   "start_elevation_m": 235.79778918029575,
   "end_elevation_m": 233.74890652957419,
   "start_xy": [
    366437.7137265377,
    215182.60305660625
   ],
   "end_xy": [
    366439.04868046456,
    215162.64765889003
   ]
  },
  "min_25m": {
   "gradient_pct": -8.405218359659784,
   "start_distance_m": 220.0,
   "end_distance_m": 245.0,
   "midpoint_distance_m": 232.5,
   "start_elevation_m": 235.85021111948913,
   "end_elevation_m": 233.74890652957419,
   "start_xy": [
    366438.9893700024,
    215187.24388563307
   ],
   "end_xy": [
    366439.04868046456,
    215162.64765889003
   ]
  },
  "min_50m": {
   "gradient_pct": -3.4555044160011334,
   "start_distance_m": 195.0,
   "end_distance_m": 245.0,
   "midpoint_distance_m": 220.0,
   "start_elevation_m": 235.47665873757475,
   "end_elevation_m": 233.74890652957419,
   "start_xy": [
    366450.29713786324,
    215209.5370666036
   ],
   "end_xy": [
    366439.04868046456,
    215162.64765889003
   ]
  },
  "min_100m": {
   "gradient_pct": 0.2592075687118154,
   "start_distance_m": 146.0,
   "end_distance_m": 246.0,
   "midpoint_distance_m": 196.0,
   "start_elevation_m": 233.61400650368972,
   "end_elevation_m": 233.87321407240154,
   "start_xy": [
    366474.107756458,
    215252.265462162
   ],
   "end_xy": [
    366439.1154281609,
    215161.6498890042
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.34532707248246,
   "start_distance_m": 72.0,
   "end_distance_m": 74.0,
   "midpoint_distance_m": 73.0,
   "start_elevation_m": 222.33660857459046,
   "end_elevation_m": 223.1435151160401,
   "start_xy": [
    366531.30944601516,
    215297.83079411378
   ],
   "end_xy": [
    366529.67662711325,
    215296.67584717408
   ]
  },
  "max_3m": {
   "gradient_pct": 35.462422004063875,
   "start_distance_m": 71.0,
   "end_distance_m": 74.0,
   "midpoint_distance_m": 72.5,
   "start_elevation_m": 222.0796424559182,
   "end_elevation_m": 223.1435151160401,
   "start_xy": [
    366532.1258554661,
    215298.40826758364
   ],
   "end_xy": [
    366529.67662711325,
    215296.67584717408
   ]
  }
 },
 "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": 0.01,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.0,
   "obstruction_max_height_m": 1.53,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    662.0,
    668.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "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/SO6510.tif",
   "data/cache/england/bulk_dtm_1m/SO6515.tif"
  ],
  "calculated_at": "2026-09-05T01:42:08+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106794610/hunt-gb/regions/region-11.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": [
   "SO6510.tif",
   "SO6515.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cinderford",
  "county": "Gloucestershire"
 }
}