{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.7009, -4.0021)",
 "slug": "discovered-lane-52-7009-4-0021",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 51.540250638505825,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 310.0,
   "end_distance_m": 312.0,
   "start_elevation_m": 71.26033324656717,
   "end_elevation_m": 72.29113825933729,
   "min_gradient_pct": -13.729001063827884,
   "suppressed_max_gradient_pct": 65.14400298890548,
   "suppressed_location_m": [
    24.0,
    26.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 51.41650838169104,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 310.0,
   "end_distance_m": 313.0,
   "start_elevation_m": 71.26033324656717,
   "end_elevation_m": 72.8028284980179,
   "min_gradient_pct": -8.701206791885538,
   "suppressed_max_gradient_pct": 61.08782929682235,
   "suppressed_location_m": [
    14.0,
    17.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 46.19108933724959,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 308.0,
   "end_distance_m": 313.0,
   "start_elevation_m": 70.49327403115542,
   "end_elevation_m": 72.8028284980179,
   "min_gradient_pct": 1.5711592158332977,
   "suppressed_max_gradient_pct": 52.313226182756694,
   "suppressed_location_m": [
    13.0,
    18.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 38.8992362359582,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 303.0,
   "end_distance_m": 313.0,
   "start_elevation_m": 68.91290487442208,
   "end_elevation_m": 72.8028284980179,
   "min_gradient_pct": 3.386744344986994
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 32.985401528878455,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 298.0,
   "end_distance_m": 318.0,
   "start_elevation_m": 67.15536236229714,
   "end_elevation_m": 73.75244266807283,
   "min_gradient_pct": 4.7754551672538526
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 30.249427739114882,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 296.0,
   "end_distance_m": 321.0,
   "start_elevation_m": 66.79839940375983,
   "end_elevation_m": 74.36075633853855,
   "min_gradient_pct": 5.01446621916682
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 26.266380006269827,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 298.0,
   "end_distance_m": 348.0,
   "start_elevation_m": 67.15536236229714,
   "end_elevation_m": 80.28855236543205,
   "min_gradient_pct": 5.333925227094369,
   "suppressed_max_gradient_pct": 28.291228609055977,
   "suppressed_location_m": [
    173.0,
    223.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 24.441556412300393,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 213.0,
   "end_distance_m": 313.0,
   "start_elevation_m": 48.36127208571751,
   "end_elevation_m": 72.8028284980179,
   "min_gradient_pct": 5.687366940735188,
   "suppressed_max_gradient_pct": 25.97162467873143,
   "suppressed_location_m": [
    168.0,
    268.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.362,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 336.0,
  "shape_class": "sustained"
 },
 "length_m": 1624.447986358994,
 "start_elevation_m": 4.957063694218934,
 "end_elevation_m": 254.13482577247763,
 "endpoint_gain_m": 249.1777620782587,
 "overall_gradient_pct": 15.339226874032505,
 "accumulated_ascent_m": 250.01583974439544,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 46.19108933724959,
   "start_distance_m": 308.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 310.5,
   "start_elevation_m": 70.49327403115542,
   "end_elevation_m": 72.8028284980179,
   "start_xy": [
    264369.4576206062,
    314354.7527040449
   ],
   "end_xy": [
    264374.06299252855,
    314352.91357436846
   ]
  },
  "max_10m": {
   "gradient_pct": 38.8992362359582,
   "start_distance_m": 303.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 308.0,
   "start_elevation_m": 68.91290487442208,
   "end_elevation_m": 72.8028284980179,
   "start_xy": [
    264364.5274664242,
    314355.58551839506
   ],
   "end_xy": [
    264374.06299252855,
    314352.91357436846
   ]
  },
  "max_20m": {
   "gradient_pct": 32.985401528878455,
   "start_distance_m": 298.0,
   "end_distance_m": 318.0,
   "midpoint_distance_m": 308.0,
   "start_elevation_m": 67.15536236229714,
   "end_elevation_m": 73.75244266807283,
   "start_xy": [
    264359.5973122422,
    314356.41833274526
   ],
   "end_xy": [
    264378.5498115887,
    314350.7071168635
   ]
  },
  "max_25m": {
   "gradient_pct": 30.249427739114882,
   "start_distance_m": 296.0,
   "end_distance_m": 321.0,
   "midpoint_distance_m": 308.5,
   "start_elevation_m": 66.79839940375983,
   "end_elevation_m": 74.36075633853855,
   "start_xy": [
    264357.6252505694,
    314356.7514584853
   ],
   "end_xy": [
    264381.24190302484,
    314349.3832423606
   ]
  },
  "max_50m": {
   "gradient_pct": 26.266380006269827,
   "start_distance_m": 298.0,
   "end_distance_m": 348.0,
   "midpoint_distance_m": 323.0,
   "start_elevation_m": 67.15536236229714,
   "end_elevation_m": 80.28855236543205,
   "start_xy": [
    264359.5973122422,
    314356.41833274526
   ],
   "end_xy": [
    264403.51076557586,
    314334.32366410666
   ]
  },
  "max_100m": {
   "gradient_pct": 24.441556412300393,
   "start_distance_m": 213.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 263.0,
   "start_elevation_m": 48.36127208571751,
   "end_elevation_m": 72.8028284980179,
   "start_xy": [
    264284.4604900357,
    314395.2808845213
   ],
   "end_xy": [
    264374.06299252855,
    314352.91357436846
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.5711592158332977,
   "start_distance_m": 18.0,
   "end_distance_m": 23.0,
   "midpoint_distance_m": 20.5,
   "start_elevation_m": 8.879189662234632,
   "end_elevation_m": 8.957747623026297,
   "start_xy": [
    264100.8391146795,
    314426.6615946572
   ],
   "end_xy": [
    264105.79377804516,
    314427.3333914514
   ]
  },
  "min_10m": {
   "gradient_pct": 3.386744344986994,
   "start_distance_m": 782.0,
   "end_distance_m": 792.0,
   "midpoint_distance_m": 787.0,
   "start_elevation_m": 160.4310853221942,
   "end_elevation_m": 160.7697597566929,
   "start_xy": [
    264619.76709122077,
    314010.84004203323
   ],
   "end_xy": [
    264629.66394155053,
    314009.4074382673
   ]
  },
  "min_20m": {
   "gradient_pct": 4.7754551672538526,
   "start_distance_m": 1508.0,
   "end_distance_m": 1528.0,
   "midpoint_distance_m": 1518.0,
   "start_elevation_m": 243.68512548037154,
   "end_elevation_m": 244.6402165138223,
   "start_xy": [
    264862.4827367713,
    313447.75730000145
   ],
   "end_xy": [
    264857.7897160938,
    313428.3490171965
   ]
  },
  "min_25m": {
   "gradient_pct": 5.01446621916682,
   "start_distance_m": 1521.0,
   "end_distance_m": 1546.0,
   "midpoint_distance_m": 1533.5,
   "start_elevation_m": 244.3694671021762,
   "end_elevation_m": 245.6230836569679,
   "start_xy": [
    264859.89885179105,
    313435.02371169213
   ],
   "end_xy": [
    264850.65674415784,
    313412.02846130583
   ]
  },
  "min_50m": {
   "gradient_pct": 5.333925227094369,
   "start_distance_m": 1496.0,
   "end_distance_m": 1546.0,
   "midpoint_distance_m": 1521.0,
   "start_elevation_m": 242.95612104342072,
   "end_elevation_m": 245.6230836569679,
   "start_xy": [
    264864.75121645426,
    313459.540932715
   ],
   "end_xy": [
    264850.65674415784,
    313412.02846130583
   ]
  },
  "min_100m": {
   "gradient_pct": 5.687366940735188,
   "start_distance_m": 1446.0,
   "end_distance_m": 1546.0,
   "midpoint_distance_m": 1496.0,
   "start_elevation_m": 239.93571671623272,
   "end_elevation_m": 245.6230836569679,
   "start_xy": [
    264868.8746170395,
    313509.1678220707
   ],
   "end_xy": [
    264850.65674415784,
    313412.02846130583
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 51.540250638505825,
   "start_distance_m": 310.0,
   "end_distance_m": 312.0,
   "midpoint_distance_m": 311.0,
   "start_elevation_m": 71.26033324656717,
   "end_elevation_m": 72.29113825933729,
   "start_xy": [
    264371.3709010924,
    314354.2374488714
   ],
   "end_xy": [
    264373.1656287165,
    314353.35486586945
   ]
  },
  "max_3m": {
   "gradient_pct": 51.41650838169104,
   "start_distance_m": 310.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 311.5,
   "start_elevation_m": 71.26033324656717,
   "end_elevation_m": 72.8028284980179,
   "start_xy": [
    264371.3709010924,
    314354.2374488714
   ],
   "end_xy": [
    264374.06299252855,
    314352.91357436846
   ]
  }
 },
 "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": 0.009,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.12,
   "windows_resited": [
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.394,
   "obstruction_max_height_m": 25.09,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    12.0,
    19.0
   ],
   [
    23.0,
    28.0
   ],
   [
    30.0,
    210.0
   ]
  ],
  "review": [
   "max5_over_45"
  ],
  "extent": [
   "may_start_earlier",
   "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/wales/dtm_1m/wg_del_22_264313_20220114dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_34_264314_20220114dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:06:42+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_22_264313_20220114dtm.tif",
   "wg_del_34_264314_20220114dtm.tif"
  ],
  "elevation_capture_dates": [
   "14-01-2022"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Arthog",
  "county": "Gwynedd - Gwynedd"
 }
}