{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.3864, -4.3195)",
 "slug": "discovered-lane-50-3864-4-3195",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 47.18926314380312,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 530.0,
   "end_distance_m": 532.0,
   "start_elevation_m": 94.6316106643935,
   "end_elevation_m": 95.57539592726957,
   "min_gradient_pct": -39.17261200869433
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 39.11960124216639,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 529.0,
   "end_distance_m": 532.0,
   "start_elevation_m": 94.40180789000458,
   "end_elevation_m": 95.57539592726957,
   "min_gradient_pct": -31.885956458738935
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.910557241646075,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 528.0,
   "end_distance_m": 533.0,
   "start_elevation_m": 94.15275261673585,
   "end_elevation_m": 95.79828047881816,
   "min_gradient_pct": -26.230232991222238
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.818908544613954,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 85.0,
   "end_distance_m": 95.0,
   "start_elevation_m": 31.88488379911021,
   "end_elevation_m": 34.466774653571605,
   "min_gradient_pct": -21.129534055185104
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.3691482683399,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 512.0,
   "end_distance_m": 532.0,
   "start_elevation_m": 90.90156627360159,
   "end_elevation_m": 95.57539592726957,
   "min_gradient_pct": -18.22446150631535
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.83259916919297,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 508.0,
   "end_distance_m": 533.0,
   "start_elevation_m": 90.09013068651991,
   "end_elevation_m": 95.79828047881816,
   "min_gradient_pct": -17.89162568606457
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.976360033854515,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 482.0,
   "end_distance_m": 532.0,
   "start_elevation_m": 85.08721591034231,
   "end_elevation_m": 95.57539592726957,
   "min_gradient_pct": -13.61744256974694
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.484795127470775,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 433.0,
   "end_distance_m": 533.0,
   "start_elevation_m": 75.31348535134738,
   "end_elevation_m": 95.79828047881816,
   "min_gradient_pct": -12.07077239752006
  }
 ],
 "shape": {
  "ascent_concentration": 0.536,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 185.0,
  "shape_class": "stepped"
 },
 "length_m": 2611.0037720284263,
 "start_elevation_m": 22.183741741179432,
 "end_elevation_m": 131.3829673513199,
 "endpoint_gain_m": 109.19922561014047,
 "overall_gradient_pct": 4.182269929288774,
 "accumulated_ascent_m": 155.81623667694674,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.910557241646075,
   "start_distance_m": 528.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 530.5,
   "start_elevation_m": 94.15275261673585,
   "end_elevation_m": 95.79828047881816,
   "start_xy": [
    235181.587997634,
    56412.19028129413
   ],
   "end_xy": [
    235184.44670654385,
    56408.088113163896
   ]
  },
  "max_10m": {
   "gradient_pct": 25.818908544613954,
   "start_distance_m": 85.0,
   "end_distance_m": 95.0,
   "midpoint_distance_m": 90.0,
   "start_elevation_m": 31.88488379911021,
   "end_elevation_m": 34.466774653571605,
   "start_xy": [
    235127.7182909648,
    56805.7522669771
   ],
   "end_xy": [
    235135.49181233288,
    56799.46160997322
   ]
  },
  "max_20m": {
   "gradient_pct": 23.3691482683399,
   "start_distance_m": 512.0,
   "end_distance_m": 532.0,
   "midpoint_distance_m": 522.0,
   "start_elevation_m": 90.90156627360159,
   "end_elevation_m": 95.57539592726957,
   "start_xy": [
    235170.07844125407,
    56423.260757787015
   ],
   "end_xy": [
    235183.87496476187,
    56408.90854678994
   ]
  },
  "max_25m": {
   "gradient_pct": 22.83259916919297,
   "start_distance_m": 508.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 520.5,
   "start_elevation_m": 90.09013068651991,
   "end_elevation_m": 95.79828047881816,
   "start_xy": [
    235167.14237109348,
    56425.97727983039
   ],
   "end_xy": [
    235184.44670654385,
    56408.088113163896
   ]
  },
  "max_50m": {
   "gradient_pct": 20.976360033854515,
   "start_distance_m": 482.0,
   "end_distance_m": 532.0,
   "midpoint_distance_m": 507.0,
   "start_elevation_m": 85.08721591034231,
   "end_elevation_m": 95.57539592726957,
   "start_xy": [
    235148.05791504966,
    56443.63467311229
   ],
   "end_xy": [
    235183.87496476187,
    56408.90854678994
   ]
  },
  "max_100m": {
   "gradient_pct": 20.484795127470775,
   "start_distance_m": 433.0,
   "end_distance_m": 533.0,
   "midpoint_distance_m": 483.0,
   "start_elevation_m": 75.31348535134738,
   "end_elevation_m": 95.79828047881816,
   "start_xy": [
    235158.0818744142,
    56491.149030442255
   ],
   "end_xy": [
    235184.44670654385,
    56408.088113163896
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -26.230232991222238,
   "start_distance_m": 1169.0,
   "end_distance_m": 1174.0,
   "midpoint_distance_m": 1171.5,
   "start_elevation_m": 89.48168470996485,
   "end_elevation_m": 88.17017306040374,
   "start_xy": [
    235094.46816043404,
    55929.29730400216
   ],
   "end_xy": [
    235092.8054291636,
    55924.58186926905
   ]
  },
  "min_10m": {
   "gradient_pct": -21.129534055185104,
   "start_distance_m": 1157.0,
   "end_distance_m": 1167.0,
   "midpoint_distance_m": 1162.0,
   "start_elevation_m": 91.4519760937697,
   "end_elevation_m": 89.33902268825119,
   "start_xy": [
    235098.45871548317,
    55940.614347361625
   ],
   "end_xy": [
    235095.13325294224,
    55931.1834778954
   ]
  },
  "min_20m": {
   "gradient_pct": -18.22446150631535,
   "start_distance_m": 1158.0,
   "end_distance_m": 1178.0,
   "midpoint_distance_m": 1168.0,
   "start_elevation_m": 91.32102993264684,
   "end_elevation_m": 87.67613763138377,
   "start_xy": [
    235098.12616922907,
    55939.671260415
   ],
   "end_xy": [
    235091.4752441472,
    55920.80952148256
   ]
  },
  "min_25m": {
   "gradient_pct": -17.89162568606457,
   "start_distance_m": 1157.0,
   "end_distance_m": 1182.0,
   "midpoint_distance_m": 1169.5,
   "start_elevation_m": 91.4519760937697,
   "end_elevation_m": 86.97906967225356,
   "start_xy": [
    235098.45871548317,
    55940.614347361625
   ],
   "end_xy": [
    235090.14505913085,
    55917.03717369607
   ]
  },
  "min_50m": {
   "gradient_pct": -13.61744256974694,
   "start_distance_m": 1139.0,
   "end_distance_m": 1189.0,
   "midpoint_distance_m": 1164.0,
   "start_elevation_m": 93.12516086349679,
   "end_elevation_m": 86.31643957862332,
   "start_xy": [
    235104.44454805684,
    55957.58991240082
   ],
   "end_xy": [
    235087.31186149188,
    55910.646258756475
   ]
  },
  "min_100m": {
   "gradient_pct": -12.07077239752006,
   "start_distance_m": 1094.0,
   "end_distance_m": 1194.0,
   "midpoint_distance_m": 1144.0,
   "start_elevation_m": 98.00306031654868,
   "end_elevation_m": 85.93228791902862,
   "start_xy": [
    235119.409129491,
    56000.02882499881
   ],
   "end_xy": [
    235085.13258290032,
    55906.146175999405
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 47.18926314380312,
   "start_distance_m": 530.0,
   "end_distance_m": 532.0,
   "midpoint_distance_m": 531.0,
   "start_elevation_m": 94.6316106643935,
   "end_elevation_m": 95.57539592726957,
   "start_xy": [
    235182.73148119793,
    56410.549414042034
   ],
   "end_xy": [
    235183.87496476187,
    56408.90854678994
   ]
  },
  "max_3m": {
   "gradient_pct": 39.11960124216639,
   "start_distance_m": 529.0,
   "end_distance_m": 532.0,
   "midpoint_distance_m": 530.5,
   "start_elevation_m": 94.40180789000458,
   "end_elevation_m": 95.57539592726957,
   "start_xy": [
    235182.15973941595,
    56411.36984766809
   ],
   "end_xy": [
    235183.87496476187,
    56408.90854678994
   ]
  }
 },
 "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": 0.059,
   "obstruction_max_height_m": 16.5,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "descends_at_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/SX3055.tif",
   "data/cache/england/bulk_dtm_1m/SX3555.tif"
  ],
  "calculated_at": "2026-09-05T00:04:50+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/root/uk-climbs/data/cache/pbf/england-2026-08-27.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "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": [
   "SX3055.tif",
   "SX3555.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Polbathic",
  "county": "Cornwall"
 }
}