{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (51.4174, -2.3326)",
 "slug": "discovered-lane-51-4174-2-3326",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 26.427131317056052,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 237.0,
   "end_distance_m": 239.0,
   "start_elevation_m": 96.63726680491756,
   "end_elevation_m": 97.16580943125868,
   "min_gradient_pct": -6.524213363838527
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.134304844948513,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 236.0,
   "end_distance_m": 239.0,
   "start_elevation_m": 96.38178028591022,
   "end_elevation_m": 97.16580943125868,
   "min_gradient_pct": -6.105991938258626
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.926885988910158,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 234.0,
   "end_distance_m": 239.0,
   "start_elevation_m": 95.86946513181317,
   "end_elevation_m": 97.16580943125868,
   "min_gradient_pct": -5.5866895062411
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.656198839102018,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 230.0,
   "end_distance_m": 240.0,
   "start_elevation_m": 94.84695259700698,
   "end_elevation_m": 97.41257248091718,
   "min_gradient_pct": -4.054439286177143
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.468559900950595,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 221.0,
   "end_distance_m": 241.0,
   "start_elevation_m": 92.75636151441202,
   "end_elevation_m": 97.65007349460214,
   "min_gradient_pct": -0.45817442366676175
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.92648175346403,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 217.0,
   "end_distance_m": 242.0,
   "start_elevation_m": 91.86919518008298,
   "end_elevation_m": 97.85081561844899,
   "min_gradient_pct": 0.12763554959076373
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.63767577412446,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 196.0,
   "end_distance_m": 246.0,
   "start_elevation_m": 88.34089418201259,
   "end_elevation_m": 98.65973206907482,
   "min_gradient_pct": 3.541451458061374
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.374548115719122,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 146.0,
   "end_distance_m": 246.0,
   "start_elevation_m": 81.2851839533557,
   "end_elevation_m": 98.65973206907482,
   "min_gradient_pct": 5.701984934155064
  }
 ],
 "shape": {
  "ascent_concentration": 0.425,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 133.0,
  "shape_class": "sustained"
 },
 "length_m": 251.5599223048396,
 "start_elevation_m": 70.74433184771728,
 "end_elevation_m": 99.18922125128239,
 "endpoint_gain_m": 28.444889403565114,
 "overall_gradient_pct": 11.307401092728783,
 "accumulated_ascent_m": 28.850535972109967,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.926885988910158,
   "start_distance_m": 234.0,
   "end_distance_m": 239.0,
   "midpoint_distance_m": 236.5,
   "start_elevation_m": 95.86946513181317,
   "end_elevation_m": 97.16580943125868,
   "start_xy": [
    376972.0974733178,
    168753.00215026928
   ],
   "end_xy": [
    376971.34541292494,
    168757.94526721767
   ]
  },
  "max_10m": {
   "gradient_pct": 25.656198839102018,
   "start_distance_m": 230.0,
   "end_distance_m": 240.0,
   "midpoint_distance_m": 235.0,
   "start_elevation_m": 94.84695259700698,
   "end_elevation_m": 97.41257248091718,
   "start_xy": [
    376972.68597657984,
    168749.0457263151
   ],
   "end_xy": [
    376971.02732915396,
    168758.89165732838
   ]
  },
  "max_20m": {
   "gradient_pct": 24.468559900950595,
   "start_distance_m": 221.0,
   "end_distance_m": 241.0,
   "midpoint_distance_m": 231.0,
   "start_elevation_m": 92.75636151441202,
   "end_elevation_m": 97.65007349460214,
   "start_xy": [
    376973.9475435028,
    168740.13458447476
   ],
   "end_xy": [
    376970.6914758642,
    168759.83357163856
   ]
  },
  "max_25m": {
   "gradient_pct": 23.92648175346403,
   "start_distance_m": 217.0,
   "end_distance_m": 242.0,
   "midpoint_distance_m": 229.5,
   "start_elevation_m": 91.86919518008298,
   "end_elevation_m": 97.85081561844899,
   "start_xy": [
    376974.508239913,
    168736.17407699014
   ],
   "end_xy": [
    376970.3556225744,
    168760.77548594875
   ]
  },
  "max_50m": {
   "gradient_pct": 20.63767577412446,
   "start_distance_m": 196.0,
   "end_distance_m": 246.0,
   "midpoint_distance_m": 221.0,
   "start_elevation_m": 88.34089418201259,
   "end_elevation_m": 98.65973206907482,
   "start_xy": [
    376982.6418343762,
    168716.98153648825
   ],
   "end_xy": [
    376968.81527818996,
    168764.44323159455
   ]
  },
  "max_100m": {
   "gradient_pct": 17.374548115719122,
   "start_distance_m": 146.0,
   "end_distance_m": 246.0,
   "midpoint_distance_m": 196.0,
   "start_elevation_m": 81.2851839533557,
   "end_elevation_m": 98.65973206907482,
   "start_xy": [
    377007.5012661216,
    168673.60914140404
   ],
   "end_xy": [
    376968.81527818996,
    168764.44323159455
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.5866895062411,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 70.74433184771728,
   "end_elevation_m": 70.46499737240522,
   "start_xy": [
    377087.599,
    168555.388
   ],
   "end_xy": [
    377087.08990554174,
    168560.36201476
   ]
  },
  "min_10m": {
   "gradient_pct": -4.054439286177143,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 70.74433184771728,
   "end_elevation_m": 70.33888791909956,
   "start_xy": [
    377087.599,
    168555.388
   ],
   "end_xy": [
    377086.3771913861,
    168565.29953338168
   ]
  },
  "min_20m": {
   "gradient_pct": -0.45817442366676175,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 70.74433184771728,
   "end_elevation_m": 70.65269696298392,
   "start_xy": [
    377087.599,
    168555.388
   ],
   "end_xy": [
    377083.644370708,
    168574.91502922348
   ]
  },
  "min_25m": {
   "gradient_pct": 0.12763554959076373,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 70.74433184771728,
   "end_elevation_m": 70.77624073511497,
   "start_xy": [
    377087.599,
    168555.388
   ],
   "end_xy": [
    377081.82739384763,
    168579.54104789172
   ]
  },
  "min_50m": {
   "gradient_pct": 3.541451458061374,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 70.74433184771728,
   "end_elevation_m": 72.51505757674796,
   "start_xy": [
    377087.599,
    168555.388
   ],
   "end_xy": [
    377066.5962693557,
    168599.15657544706
   ]
  },
  "min_100m": {
   "gradient_pct": 5.701984934155064,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 70.74433184771728,
   "end_elevation_m": 76.44631678187234,
   "start_xy": [
    377087.599,
    168555.388
   ],
   "end_xy": [
    377030.77973454725,
    168633.98082602973
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 26.427131317056052,
   "start_distance_m": 237.0,
   "end_distance_m": 239.0,
   "midpoint_distance_m": 238.0,
   "start_elevation_m": 96.63726680491756,
   "end_elevation_m": 97.16580943125868,
   "start_xy": [
    376971.6462370821,
    168755.96802043833
   ],
   "end_xy": [
    376971.34541292494,
    168757.94526721767
   ]
  },
  "max_3m": {
   "gradient_pct": 26.134304844948513,
   "start_distance_m": 236.0,
   "end_distance_m": 239.0,
   "midpoint_distance_m": 237.5,
   "start_elevation_m": 96.38178028591022,
   "end_elevation_m": 97.16580943125868,
   "start_xy": [
    376971.7966491607,
    168754.97939704865
   ],
   "end_xy": [
    376971.34541292494,
    168757.94526721767
   ]
  }
 },
 "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": 0.38,
   "flagged_windows_m": []
  },
  "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/ST7565.tif"
  ],
  "calculated_at": "2026-09-05T01:29:47+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-08.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": [
   "ST7565.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Upper Swainswick",
  "county": "Bath and North East Somerset"
 }
}