{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (51.0977, -4.0565)",
 "slug": "discovered-lane-51-0977-4-0565",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 39.44729966473126,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 161.0,
   "end_distance_m": 163.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 41.15458854367443,
   "min_gradient_pct": -26.720777691716435,
   "suppressed_max_gradient_pct": 49.657855269531126,
   "suppressed_location_m": [
    150.0,
    152.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.38300432823417,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 161.0,
   "end_distance_m": 164.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 41.48713268022683,
   "min_gradient_pct": -17.642021099049998,
   "suppressed_max_gradient_pct": 43.53145241928876,
   "suppressed_location_m": [
    149.0,
    152.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.62392758177984,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 161.0,
   "end_distance_m": 166.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 42.096838929468795,
   "min_gradient_pct": -5.70339901546788,
   "suppressed_max_gradient_pct": 34.73905462709155,
   "suppressed_location_m": [
    149.0,
    154.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.008525155965515,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 161.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 43.066495065976355,
   "min_gradient_pct": -1.2631130754130737
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.49854748614844,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 161.0,
   "end_distance_m": 181.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 44.86535204760949,
   "min_gradient_pct": 2.150937324490485
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.438622355040224,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 161.0,
   "end_distance_m": 186.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 45.72529813913986,
   "min_gradient_pct": 3.812571454292282
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.71109243534741,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 161.0,
   "end_distance_m": 211.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 49.72118876805351,
   "min_gradient_pct": 5.047199190868767,
   "suppressed_max_gradient_pct": 18.73700349304751,
   "suppressed_location_m": [
    149.0,
    199.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.583127521773136,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 47.0,
   "end_distance_m": 147.0,
   "start_elevation_m": 25.038827487785163,
   "end_elevation_m": 38.6219550095583,
   "min_gradient_pct": 8.211490029584464,
   "suppressed_max_gradient_pct": 17.70841440456116,
   "suppressed_location_m": [
    99.0,
    199.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.378,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 95.0,
  "shape_class": "sustained"
 },
 "length_m": 247.46522827276968,
 "start_elevation_m": 22.474403356874657,
 "end_elevation_m": 51.88907002654909,
 "endpoint_gain_m": 29.414666669674435,
 "overall_gradient_pct": 11.886383745700217,
 "accumulated_ascent_m": 31.273808344318564,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.62392758177984,
   "start_distance_m": 161.0,
   "end_distance_m": 166.0,
   "midpoint_distance_m": 163.5,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 42.096838929468795,
   "start_xy": [
    256130.75987817463,
    135013.32034942
   ],
   "end_xy": [
    256131.37351921428,
    135008.3581478245
   ]
  },
  "max_10m": {
   "gradient_pct": 27.008525155965515,
   "start_distance_m": 161.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 166.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 43.066495065976355,
   "start_xy": [
    256130.75987817463,
    135013.32034942
   ],
   "end_xy": [
    256131.8655625257,
    135003.38308348885
   ]
  },
  "max_20m": {
   "gradient_pct": 22.49854748614844,
   "start_distance_m": 161.0,
   "end_distance_m": 181.0,
   "midpoint_distance_m": 171.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 44.86535204760949,
   "start_xy": [
    256130.75987817463,
    135013.32034942
   ],
   "end_xy": [
    256132.74183645836,
    134993.42155027378
   ]
  },
  "max_25m": {
   "gradient_pct": 21.438622355040224,
   "start_distance_m": 161.0,
   "end_distance_m": 186.0,
   "midpoint_distance_m": 173.5,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 45.72529813913986,
   "start_xy": [
    256130.75987817463,
    135013.32034942
   ],
   "end_xy": [
    256133.1799734247,
    134988.44078366624
   ]
  },
  "max_50m": {
   "gradient_pct": 18.71109243534741,
   "start_distance_m": 161.0,
   "end_distance_m": 211.0,
   "midpoint_distance_m": 186.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 49.72118876805351,
   "start_xy": [
    256130.75987817463,
    135013.32034942
   ],
   "end_xy": [
    256140.43747983238,
    134964.88450684192
   ]
  },
  "max_100m": {
   "gradient_pct": 13.583127521773136,
   "start_distance_m": 47.0,
   "end_distance_m": 147.0,
   "midpoint_distance_m": 97.0,
   "start_elevation_m": 25.038827487785163,
   "end_elevation_m": 38.6219550095583,
   "start_xy": [
    256105.08518454505,
    135122.6028640409
   ],
   "end_xy": [
    256129.0416832636,
    135027.21451388742
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.70339901546788,
   "start_distance_m": 154.0,
   "end_distance_m": 159.0,
   "midpoint_distance_m": 156.5,
   "start_elevation_m": 40.60464589728932,
   "end_elevation_m": 40.31947594651593,
   "start_xy": [
    256129.90078071912,
    135020.26743165372
   ],
   "end_xy": [
    256130.51442175877,
    135015.3052300582
   ]
  },
  "min_10m": {
   "gradient_pct": -1.2631130754130737,
   "start_distance_m": 237.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 242.0,
   "start_elevation_m": 51.983189687930604,
   "end_elevation_m": 51.8568783803893,
   "start_xy": [
    256153.903274733,
    134942.9326876733
   ],
   "end_xy": [
    256162.56789726263,
    134937.9402617681
   ]
  },
  "min_20m": {
   "gradient_pct": 2.150937324490485,
   "start_distance_m": 227.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 237.0,
   "start_elevation_m": 51.4266909154912,
   "end_elevation_m": 51.8568783803893,
   "start_xy": [
    256147.50354460234,
    134950.56078251827
   ],
   "end_xy": [
    256162.56789726263,
    134937.9402617681
   ]
  },
  "min_25m": {
   "gradient_pct": 3.812571454292282,
   "start_distance_m": 222.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 234.5,
   "start_elevation_m": 50.903735516816226,
   "end_elevation_m": 51.8568783803893,
   "start_xy": [
    256145.14243171975,
    134954.9414978538
   ],
   "end_xy": [
    256162.56789726263,
    134937.9402617681
   ]
  },
  "min_50m": {
   "gradient_pct": 5.047199190868767,
   "start_distance_m": 2.0,
   "end_distance_m": 52.0,
   "midpoint_distance_m": 27.0,
   "start_elevation_m": 22.55690623878599,
   "end_elevation_m": 25.080505834220375,
   "start_xy": [
    256101.50811978683,
    135167.36228288783
   ],
   "end_xy": [
    256104.8726417533,
    135117.60738352733
   ]
  },
  "min_100m": {
   "gradient_pct": 8.211490029584464,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 22.474403356874657,
   "end_elevation_m": 30.68589338645912,
   "start_xy": [
    256101.278,
    135169.349
   ],
   "end_xy": [
    256114.7059563607,
    135071.63590312898
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 39.44729966473126,
   "start_distance_m": 161.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 162.0,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 41.15458854367443,
   "start_xy": [
    256130.75987817463,
    135013.32034942
   ],
   "end_xy": [
    256131.0053345905,
    135011.3354687818
   ]
  },
  "max_3m": {
   "gradient_pct": 37.38300432823417,
   "start_distance_m": 161.0,
   "end_distance_m": 164.0,
   "midpoint_distance_m": 162.5,
   "start_elevation_m": 40.3656425503798,
   "end_elevation_m": 41.48713268022683,
   "start_xy": [
    256130.75987817463,
    135013.32034942
   ],
   "end_xy": [
    256131.12806279844,
    135010.3430284627
   ]
  }
 },
 "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": 0.024,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.048,
   "obstruction_max_height_m": 4.94,
   "flagged_windows_m": [
    2,
    3,
    5
   ]
  },
  "excluded_ranges_m": [
   [
    148.0,
    153.0
   ]
  ],
  "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/bulk_dtm_1m/SS5530.tif",
   "data/cache/england/bulk_dtm_1m/SS5535.tif"
  ],
  "calculated_at": "2026-09-05T01:43:36+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": [
   "SS5530.tif",
   "SS5535.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Barnstaple",
  "county": "Devon"
 }
}