{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (54.6899, -1.9613)",
 "slug": "discovered-lane-54-6899-1-9613",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.87547092052978,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 701.0,
   "end_distance_m": 703.0,
   "start_elevation_m": 361.2631298389048,
   "end_elevation_m": 361.86063925731537,
   "min_gradient_pct": -31.86400761451864
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.050064318529166,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 700.0,
   "end_distance_m": 703.0,
   "start_elevation_m": 361.0191373277595,
   "end_elevation_m": 361.86063925731537,
   "min_gradient_pct": -27.724246811055764
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.083118864449943,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 698.0,
   "end_distance_m": 703.0,
   "start_elevation_m": 360.5564833140929,
   "end_elevation_m": 361.86063925731537,
   "min_gradient_pct": -25.375183788245295
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.929960280203773,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 693.0,
   "end_distance_m": 703.0,
   "start_elevation_m": 359.467643229295,
   "end_elevation_m": 361.86063925731537,
   "min_gradient_pct": -24.60118079838935
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.858868551266198,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 618.0,
   "end_distance_m": 638.0,
   "start_elevation_m": 343.3557963773332,
   "end_elevation_m": 347.92757008758645,
   "min_gradient_pct": -24.194612349882618
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.83059642447097,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 613.0,
   "end_distance_m": 638.0,
   "start_elevation_m": 342.2199209814687,
   "end_elevation_m": 347.92757008758645,
   "min_gradient_pct": -23.990177353793342
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.28753117027918,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 596.0,
   "end_distance_m": 646.0,
   "start_elevation_m": 338.55533358119624,
   "end_elevation_m": 349.6990991663358,
   "min_gradient_pct": -22.820895748533076
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.8150689857232,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 603.0,
   "end_distance_m": 703.0,
   "start_elevation_m": 340.04557027159217,
   "end_elevation_m": 361.86063925731537,
   "min_gradient_pct": -20.63572439954856
  }
 ],
 "shape": {
  "ascent_concentration": 0.476,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 173.0,
  "shape_class": "stepped"
 },
 "length_m": 1641.1759830875021,
 "start_elevation_m": 347.1821222597656,
 "end_elevation_m": 419.91629022521954,
 "endpoint_gain_m": 72.73416796545393,
 "overall_gradient_pct": 4.431832339431449,
 "accumulated_ascent_m": 101.76250355394609,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.083118864449943,
   "start_distance_m": 698.0,
   "end_distance_m": 703.0,
   "midpoint_distance_m": 700.5,
   "start_elevation_m": 360.5564833140929,
   "end_elevation_m": 361.86063925731537,
   "start_xy": [
    402762.1230566587,
    531967.1860125144
   ],
   "end_xy": [
    402765.7841666129,
    531970.5844697515
   ]
  },
  "max_10m": {
   "gradient_pct": 23.929960280203773,
   "start_distance_m": 693.0,
   "end_distance_m": 703.0,
   "midpoint_distance_m": 698.0,
   "start_elevation_m": 359.467643229295,
   "end_elevation_m": 361.86063925731537,
   "start_xy": [
    402758.4410565269,
    531963.803280626
   ],
   "end_xy": [
    402765.7841666129,
    531970.5844697515
   ]
  },
  "max_20m": {
   "gradient_pct": 22.858868551266198,
   "start_distance_m": 618.0,
   "end_distance_m": 638.0,
   "midpoint_distance_m": 628.0,
   "start_elevation_m": 343.3557963773332,
   "end_elevation_m": 347.92757008758645,
   "start_xy": [
    402709.6808701652,
    531907.0138637705
   ],
   "end_xy": [
    402721.6352140143,
    531923.0477114571
   ]
  },
  "max_25m": {
   "gradient_pct": 22.83059642447097,
   "start_distance_m": 613.0,
   "end_distance_m": 638.0,
   "midpoint_distance_m": 625.5,
   "start_elevation_m": 342.2199209814687,
   "end_elevation_m": 347.92757008758645,
   "start_xy": [
    402707.0779687908,
    531902.744800122
   ],
   "end_xy": [
    402721.6352140143,
    531923.0477114571
   ]
  },
  "max_50m": {
   "gradient_pct": 22.28753117027918,
   "start_distance_m": 596.0,
   "end_distance_m": 646.0,
   "midpoint_distance_m": 621.0,
   "start_elevation_m": 338.55533358119624,
   "end_elevation_m": 349.6990991663358,
   "start_xy": [
    402698.33574257395,
    531888.1661791817
   ],
   "end_xy": [
    402726.41862332466,
    531929.4601209395
   ]
  },
  "max_100m": {
   "gradient_pct": 21.8150689857232,
   "start_distance_m": 603.0,
   "end_distance_m": 703.0,
   "midpoint_distance_m": 653.0,
   "start_elevation_m": 340.04557027159217,
   "end_elevation_m": 361.86063925731537,
   "start_xy": [
    402701.87216604204,
    531894.2066728249
   ],
   "end_xy": [
    402765.7841666129,
    531970.5844697515
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -25.375183788245295,
   "start_distance_m": 520.0,
   "end_distance_m": 525.0,
   "midpoint_distance_m": 522.5,
   "start_elevation_m": 344.41126876604204,
   "end_elevation_m": 343.1425095766298,
   "start_xy": [
    402687.8355008701,
    531814.5415131467
   ],
   "end_xy": [
    402687.9007025916,
    531819.5410880022
   ]
  },
  "min_10m": {
   "gradient_pct": -24.60118079838935,
   "start_distance_m": 522.0,
   "end_distance_m": 532.0,
   "midpoint_distance_m": 527.0,
   "start_elevation_m": 343.97423698096145,
   "end_elevation_m": 341.5141189011225,
   "start_xy": [
    402687.86158155865,
    531816.5413430888
   ],
   "end_xy": [
    402687.9919850016,
    531826.5404927998
   ]
  },
  "min_20m": {
   "gradient_pct": -24.194612349882618,
   "start_distance_m": 517.0,
   "end_distance_m": 537.0,
   "midpoint_distance_m": 527.0,
   "start_elevation_m": 345.1346234436354,
   "end_elevation_m": 340.2957009736589,
   "start_xy": [
    402687.7963798372,
    531811.5417682334
   ],
   "end_xy": [
    402687.94076639594,
    531831.5401872337
   ]
  },
  "min_25m": {
   "gradient_pct": -23.990177353793342,
   "start_distance_m": 517.0,
   "end_distance_m": 542.0,
   "midpoint_distance_m": 529.5,
   "start_elevation_m": 345.1346234436354,
   "end_elevation_m": 339.13707910518707,
   "start_xy": [
    402687.7963798372,
    531811.5417682334
   ],
   "end_xy": [
    402687.8858351943,
    531836.5398854809
   ]
  },
  "min_50m": {
   "gradient_pct": -22.820895748533076,
   "start_distance_m": 497.0,
   "end_distance_m": 547.0,
   "midpoint_distance_m": 522.0,
   "start_elevation_m": 349.43910281071567,
   "end_elevation_m": 338.02865493644913,
   "start_xy": [
    402687.5355729514,
    531791.5434688115
   ],
   "end_xy": [
    402687.8309039927,
    531841.5395837282
   ]
  },
  "min_100m": {
   "gradient_pct": -20.63572439954856,
   "start_distance_m": 454.0,
   "end_distance_m": 554.0,
   "midpoint_distance_m": 504.0,
   "start_elevation_m": 357.3971191927347,
   "end_elevation_m": 336.7613947931861,
   "start_xy": [
    402687.22968186776,
    531748.6452551943
   ],
   "end_xy": [
    402687.7540003104,
    531848.5391612742
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.87547092052978,
   "start_distance_m": 701.0,
   "end_distance_m": 703.0,
   "midpoint_distance_m": 702.0,
   "start_elevation_m": 361.2631298389048,
   "end_elevation_m": 361.86063925731537,
   "start_xy": [
    402764.33225673786,
    531969.2156516474
   ],
   "end_xy": [
    402765.7841666129,
    531970.5844697515
   ]
  },
  "max_3m": {
   "gradient_pct": 28.050064318529166,
   "start_distance_m": 700.0,
   "end_distance_m": 703.0,
   "midpoint_distance_m": 701.5,
   "start_elevation_m": 361.0191373277595,
   "end_elevation_m": 361.86063925731537,
   "start_xy": [
    402763.59585671144,
    531968.5391052697
   ],
   "end_xy": [
    402765.7841666129,
    531970.5844697515
   ]
  }
 },
 "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": 0.41,
   "flagged_windows_m": []
  },
  "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/NZ0030.tif"
  ],
  "calculated_at": "2026-09-05T01:16:37+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-07.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": [
   "NZ0030.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Neighbour Moor Head",
  "county": "County Durham"
 },
 "review_flags": [
  {
   "kind": "possible-bridge-or-hollow",
   "span_m": [
    482.0,
    662.0
   ],
   "status": "pending-human-review",
   "noted": "2026-09-21",
   "figure_adjusted": false
  }
 ]
}