{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (51.7399, -4.6616)",
 "slug": "discovered-lane-51-7399-4-6616",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 48.20007733197791,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 347.0,
   "end_distance_m": 349.0,
   "start_elevation_m": 48.20259079273799,
   "end_elevation_m": 49.16659233937755,
   "min_gradient_pct": -49.1416815598221,
   "suppressed_max_gradient_pct": 73.56634680808298,
   "suppressed_location_m": [
    334.0,
    336.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 43.168399028978634,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 346.0,
   "end_distance_m": 349.0,
   "start_elevation_m": 47.87154036850819,
   "end_elevation_m": 49.16659233937755,
   "min_gradient_pct": -29.62040415474168,
   "suppressed_max_gradient_pct": 61.151415629747305,
   "suppressed_location_m": [
    222.0,
    225.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.75847951597086,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 344.0,
   "end_distance_m": 349.0,
   "start_elevation_m": 47.52866836357901,
   "end_elevation_m": 49.16659233937755,
   "min_gradient_pct": -20.519813721894593,
   "suppressed_max_gradient_pct": 40.07356207117937,
   "suppressed_location_m": [
    220.0,
    225.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.931489883432988,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 297.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 38.77321613256683,
   "end_elevation_m": 41.66636512091013,
   "min_gradient_pct": -16.908792403794735,
   "suppressed_max_gradient_pct": 32.38913034532814,
   "suppressed_location_m": [
    326.0,
    336.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.89980051158753,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 286.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 36.47327181839056,
   "end_elevation_m": 41.45323192070806,
   "min_gradient_pct": -12.236135808202704
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.583816052704577,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 282.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 35.770411107733985,
   "end_elevation_m": 41.66636512091013,
   "min_gradient_pct": -12.707371852991912,
   "suppressed_max_gradient_pct": 23.753455395941188,
   "suppressed_location_m": [
    324.0,
    349.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.034180175328288,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 265.0,
   "end_distance_m": 315.0,
   "start_elevation_m": 33.25135256581582,
   "end_elevation_m": 42.768442653479966,
   "min_gradient_pct": -8.767556578023687,
   "suppressed_max_gradient_pct": 20.658456376056566,
   "suppressed_location_m": [
    286.0,
    336.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.396895901914185,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 231.0,
   "end_distance_m": 331.0,
   "start_elevation_m": 29.466814528047983,
   "end_elevation_m": 44.86371042996217,
   "min_gradient_pct": -4.209549314618897,
   "suppressed_max_gradient_pct": 18.34494221485967,
   "suppressed_location_m": [
    276.0,
    376.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.451,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 58.0,
  "shape_class": "stepped"
 },
 "length_m": 1031.183501100605,
 "start_elevation_m": 9.065210420502176,
 "end_elevation_m": 87.1660919952543,
 "endpoint_gain_m": 78.10088157475212,
 "overall_gradient_pct": 7.573907213545728,
 "accumulated_ascent_m": 91.47666018379485,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.75847951597086,
   "start_distance_m": 344.0,
   "end_distance_m": 349.0,
   "midpoint_distance_m": 346.5,
   "start_elevation_m": 47.52866836357901,
   "end_elevation_m": 49.16659233937755,
   "start_xy": [
    216177.37654711524,
    207345.50022398063
   ],
   "end_xy": [
    216176.6948547066,
    207350.45353554565
   ]
  },
  "max_10m": {
   "gradient_pct": 28.931489883432988,
   "start_distance_m": 297.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 302.0,
   "start_elevation_m": 38.77321613256683,
   "end_elevation_m": 41.66636512091013,
   "start_xy": [
    216184.71435694903,
    207299.12846132522
   ],
   "end_xy": [
    216182.42107093916,
    207308.8457183996
   ]
  },
  "max_20m": {
   "gradient_pct": 24.89980051158753,
   "start_distance_m": 286.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 296.0,
   "start_elevation_m": 36.47327181839056,
   "end_elevation_m": 41.45323192070806,
   "start_xy": [
    216188.69116064554,
    207288.92588146424
   ],
   "end_xy": [
    216182.5574094209,
    207307.85505608658
   ]
  },
  "max_25m": {
   "gradient_pct": 23.583816052704577,
   "start_distance_m": 282.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 294.5,
   "start_elevation_m": 35.770411107733985,
   "end_elevation_m": 41.66636512091013,
   "start_xy": [
    216190.45467309008,
    207285.33561352742
   ],
   "end_xy": [
    216182.42107093916,
    207308.8457183996
   ]
  },
  "max_50m": {
   "gradient_pct": 19.034180175328288,
   "start_distance_m": 265.0,
   "end_distance_m": 315.0,
   "midpoint_distance_m": 290.0,
   "start_elevation_m": 33.25135256581582,
   "end_elevation_m": 42.768442653479966,
   "start_xy": [
    216197.94960097934,
    207270.07697479604
   ],
   "end_xy": [
    216181.33036308535,
    207316.7710169036
   ]
  },
  "max_100m": {
   "gradient_pct": 15.396895901914185,
   "start_distance_m": 231.0,
   "end_distance_m": 331.0,
   "midpoint_distance_m": 281.0,
   "start_elevation_m": 29.466814528047983,
   "end_elevation_m": 44.86371042996217,
   "start_xy": [
    216217.5454020349,
    207242.72453420758
   ],
   "end_xy": [
    216179.14894737772,
    207332.62161391161
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -20.519813721894593,
   "start_distance_m": 876.0,
   "end_distance_m": 881.0,
   "midpoint_distance_m": 878.5,
   "start_elevation_m": 87.50876155146611,
   "end_elevation_m": 86.48277086537138,
   "start_xy": [
    216263.97688297508,
    207834.64212593785
   ],
   "end_xy": [
    216265.83885521773,
    207839.28249869955
   ]
  },
  "min_10m": {
   "gradient_pct": -16.908792403794735,
   "start_distance_m": 876.0,
   "end_distance_m": 886.0,
   "midpoint_distance_m": 881.0,
   "start_elevation_m": 87.50876155146611,
   "end_elevation_m": 85.81788231108663,
   "start_xy": [
    216263.97688297508,
    207834.64212593785
   ],
   "end_xy": [
    216267.46154164308,
    207843.99551506186
   ]
  },
  "min_20m": {
   "gradient_pct": -12.236135808202704,
   "start_distance_m": 868.0,
   "end_distance_m": 888.0,
   "midpoint_distance_m": 878.0,
   "start_elevation_m": 88.10019767640509,
   "end_elevation_m": 85.65297051476455,
   "start_xy": [
    216261.12295325473,
    207827.1688804991
   ],
   "end_xy": [
    216267.87434785833,
    207845.95244915085
   ]
  },
  "min_25m": {
   "gradient_pct": -12.707371852991912,
   "start_distance_m": 874.0,
   "end_distance_m": 899.0,
   "midpoint_distance_m": 886.5,
   "start_elevation_m": 87.75628590808135,
   "end_elevation_m": 84.57944294483337,
   "start_xy": [
    216263.23380257917,
    207832.78531309727
   ],
   "end_xy": [
    216269.7365825156,
    207856.7852489834
   ]
  },
  "min_50m": {
   "gradient_pct": -8.767556578023687,
   "start_distance_m": 868.0,
   "end_distance_m": 918.0,
   "midpoint_distance_m": 893.0,
   "start_elevation_m": 88.10019767640509,
   "end_elevation_m": 83.71641938739324,
   "start_xy": [
    216261.12295325473,
    207827.1688804991
   ],
   "end_xy": [
    216267.11033968066,
    207875.4772941
   ]
  },
  "min_100m": {
   "gradient_pct": -4.209549314618897,
   "start_distance_m": 854.0,
   "end_distance_m": 954.0,
   "midpoint_distance_m": 904.0,
   "start_elevation_m": 87.99963607785955,
   "end_elevation_m": 83.79008676324065,
   "start_xy": [
    216256.4335516893,
    207813.98401545058
   ],
   "end_xy": [
    216263.96557314612,
    207911.1796560826
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 48.20007733197791,
   "start_distance_m": 347.0,
   "end_distance_m": 349.0,
   "midpoint_distance_m": 348.0,
   "start_elevation_m": 48.20259079273799,
   "end_elevation_m": 49.16659233937755,
   "start_xy": [
    216176.96753167006,
    207348.47221091963
   ],
   "end_xy": [
    216176.6948547066,
    207350.45353554565
   ]
  },
  "max_3m": {
   "gradient_pct": 43.168399028978634,
   "start_distance_m": 346.0,
   "end_distance_m": 349.0,
   "midpoint_distance_m": 347.5,
   "start_elevation_m": 47.87154036850819,
   "end_elevation_m": 49.16659233937755,
   "start_xy": [
    216177.1038701518,
    207347.48154860662
   ],
   "end_xy": [
    216176.6948547066,
    207350.45353554565
   ]
  }
 },
 "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": 0.03,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.564,
   "obstruction_max_height_m": 20.44,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    206.0,
    211.0
   ],
   [
    221.0,
    226.0
   ],
   [
    332.0,
    338.0
   ],
   [
    369.0,
    374.0
   ],
   [
    388.0,
    393.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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/wales/dtm_1m/wg_del_35_216207_20210210dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:07:12+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/wales-2026-08-11.osm.pbf",
  "osm_snapshot": "2026-08-10T20:21:40Z",
  "run_id": "hunt-wales-260905",
  "elevation_provider": "Welsh Government",
  "elevation_dataset": "Welsh Government LiDAR 1m DTM (2020-2023)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Crown copyright Welsh Government",
  "elevation_catalogue_layer": "geonode:welsh_government_lidar_tile_catalogue_2020_2023",
  "elevation_tile_ids": [
   "wg_del_35_216207_20210210dtm.tif"
  ],
  "elevation_capture_dates": [
   "10-02-2021"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Amroth",
  "county": "Sir Benfro - Pembrokeshire"
 }
}