{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.0148, -4.5581)",
 "slug": "discovered-lane-52-0148-4-5581",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 42.11339427024008,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 444.0,
   "end_distance_m": 446.0,
   "start_elevation_m": 57.3501056531297,
   "end_elevation_m": 58.192373538534504,
   "min_gradient_pct": -29.503322453950176,
   "suppressed_max_gradient_pct": 50.49542868138328,
   "suppressed_location_m": [
    4.0,
    6.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 39.83311844891565,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 444.0,
   "end_distance_m": 447.0,
   "start_elevation_m": 57.3501056531297,
   "end_elevation_m": 58.54509920659717,
   "min_gradient_pct": -15.126214189402157,
   "suppressed_max_gradient_pct": 49.048811116545586,
   "suppressed_location_m": [
    4.0,
    7.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.538592393405594,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 443.0,
   "end_distance_m": 448.0,
   "start_elevation_m": 57.06945996641534,
   "end_elevation_m": 58.79638958608562,
   "min_gradient_pct": -8.225878863488276,
   "suppressed_max_gradient_pct": 39.66767508739807,
   "suppressed_location_m": [
    3.0,
    8.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.84325713830887,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 466.0,
   "end_distance_m": 476.0,
   "start_elevation_m": 61.11773678981819,
   "end_elevation_m": 63.802062503649076,
   "min_gradient_pct": -7.539105318013526
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.768337290014856,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 364.0,
   "end_distance_m": 384.0,
   "start_elevation_m": 44.574840407170484,
   "end_elevation_m": 48.728507865173455,
   "min_gradient_pct": -5.552962811118647
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.444612735908464,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 363.0,
   "end_distance_m": 388.0,
   "start_elevation_m": 44.38049649875658,
   "end_elevation_m": 49.491649682733694,
   "min_gradient_pct": -4.14082470873538
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.974869055137376,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 357.0,
   "end_distance_m": 407.0,
   "start_elevation_m": 43.33694892915556,
   "end_elevation_m": 52.82438345672425,
   "min_gradient_pct": -1.5771799493572871
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.721965300983811,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 443.0,
   "end_distance_m": 543.0,
   "start_elevation_m": 57.06945996641534,
   "end_elevation_m": 71.79142526739915,
   "min_gradient_pct": -1.2002952736334294,
   "suppressed_max_gradient_pct": 16.761260119190105,
   "suppressed_location_m": [
    372.0,
    472.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.514,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 184.0,
  "shape_class": "stepped"
 },
 "length_m": 2196.540331872634,
 "start_elevation_m": 26.5406245201427,
 "end_elevation_m": 151.28690394287088,
 "endpoint_gain_m": 124.74627942272818,
 "overall_gradient_pct": 5.679216430156657,
 "accumulated_ascent_m": 133.3760493418038,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.538592393405594,
   "start_distance_m": 443.0,
   "end_distance_m": 448.0,
   "midpoint_distance_m": 445.5,
   "start_elevation_m": 57.06945996641534,
   "end_elevation_m": 58.79638958608562,
   "start_xy": [
    224281.52305426853,
    238347.59423102028
   ],
   "end_xy": [
    224277.04282111823,
    238349.80233101232
   ]
  },
  "max_10m": {
   "gradient_pct": 26.84325713830887,
   "start_distance_m": 466.0,
   "end_distance_m": 476.0,
   "midpoint_distance_m": 471.0,
   "start_elevation_m": 61.11773678981819,
   "end_elevation_m": 63.802062503649076,
   "start_xy": [
    224260.24957747725,
    238356.2820661932
   ],
   "end_xy": [
    224250.76974482034,
    238359.37628136377
   ]
  },
  "max_20m": {
   "gradient_pct": 20.768337290014856,
   "start_distance_m": 364.0,
   "end_distance_m": 384.0,
   "midpoint_distance_m": 374.0,
   "start_elevation_m": 44.574840407170484,
   "end_elevation_m": 48.728507865173455,
   "start_xy": [
    224346.55007657892,
    238303.39500745424
   ],
   "end_xy": [
    224330.0529792735,
    238314.50445821215
   ]
  },
  "max_25m": {
   "gradient_pct": 20.444612735908464,
   "start_distance_m": 363.0,
   "end_distance_m": 388.0,
   "midpoint_distance_m": 375.5,
   "start_elevation_m": 44.38049649875658,
   "end_elevation_m": 49.491649682733694,
   "start_xy": [
    224347.47248449322,
    238303.00879036554
   ],
   "end_xy": [
    224327.00541042275,
    238317.09527354714
   ]
  },
  "max_50m": {
   "gradient_pct": 18.974869055137376,
   "start_distance_m": 357.0,
   "end_distance_m": 407.0,
   "midpoint_distance_m": 382.0,
   "start_elevation_m": 43.33694892915556,
   "end_elevation_m": 52.82438345672425,
   "start_xy": [
    224353.25270442938,
    238301.48549684978
   ],
   "end_xy": [
    224312.47182268856,
    238329.32611674775
   ]
  },
  "max_100m": {
   "gradient_pct": 14.721965300983811,
   "start_distance_m": 443.0,
   "end_distance_m": 543.0,
   "midpoint_distance_m": 493.0,
   "start_elevation_m": 57.06945996641534,
   "end_elevation_m": 71.79142526739915,
   "start_xy": [
    224281.52305426853,
    238347.59423102028
   ],
   "end_xy": [
    224184.3667130292,
    238366.904516529
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.225878863488276,
   "start_distance_m": 12.0,
   "end_distance_m": 17.0,
   "midpoint_distance_m": 14.5,
   "start_elevation_m": 27.872829166445197,
   "end_elevation_m": 27.461535223270783,
   "start_xy": [
    224599.69908396516,
    238137.2780825086
   ],
   "end_xy": [
    224594.71446072916,
    238137.669913078
   ]
  },
  "min_10m": {
   "gradient_pct": -7.539105318013526,
   "start_distance_m": 9.0,
   "end_distance_m": 19.0,
   "midpoint_distance_m": 14.0,
   "start_elevation_m": 28.10005008181674,
   "end_elevation_m": 27.346139550015387,
   "start_xy": [
    224602.690307179,
    238137.05238680943
   ],
   "end_xy": [
    224592.72061143475,
    238137.82664530576
   ]
  },
  "min_20m": {
   "gradient_pct": -5.552962811118647,
   "start_distance_m": 9.0,
   "end_distance_m": 29.0,
   "midpoint_distance_m": 19.0,
   "start_elevation_m": 28.10005008181674,
   "end_elevation_m": 26.98945751959301,
   "start_xy": [
    224602.690307179,
    238137.05238680943
   ],
   "end_xy": [
    224582.75136496275,
    238138.61030644458
   ]
  },
  "min_25m": {
   "gradient_pct": -4.14082470873538,
   "start_distance_m": 9.0,
   "end_distance_m": 34.0,
   "midpoint_distance_m": 21.5,
   "start_elevation_m": 28.10005008181674,
   "end_elevation_m": 27.064843904632895,
   "start_xy": [
    224602.690307179,
    238137.05238680943
   ],
   "end_xy": [
    224577.86804072306,
    238139.674528634
   ]
  },
  "min_50m": {
   "gradient_pct": -1.5771799493572871,
   "start_distance_m": 1723.0,
   "end_distance_m": 1773.0,
   "midpoint_distance_m": 1748.0,
   "start_elevation_m": 154.46432947363155,
   "end_elevation_m": 153.6757394989529,
   "start_xy": [
    223605.2089116455,
    239167.97091942752
   ],
   "end_xy": [
    223573.36070968866,
    239206.51283320785
   ]
  },
  "min_100m": {
   "gradient_pct": -1.2002952736334294,
   "start_distance_m": 1705.0,
   "end_distance_m": 1805.0,
   "midpoint_distance_m": 1755.0,
   "start_elevation_m": 154.53565502533414,
   "end_elevation_m": 153.3353597517007,
   "start_xy": [
    223616.47562261944,
    239153.93406451863
   ],
   "end_xy": [
    223552.75910864855,
    239230.99577611982
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 42.11339427024008,
   "start_distance_m": 444.0,
   "end_distance_m": 446.0,
   "midpoint_distance_m": 445.0,
   "start_elevation_m": 57.3501056531297,
   "end_elevation_m": 58.192373538534504,
   "start_xy": [
    224280.63653689183,
    238348.05692632045
   ],
   "end_xy": [
    224278.8635021384,
    238348.98231692077
   ]
  },
  "max_3m": {
   "gradient_pct": 39.83311844891565,
   "start_distance_m": 444.0,
   "end_distance_m": 447.0,
   "midpoint_distance_m": 445.5,
   "start_elevation_m": 57.3501056531297,
   "end_elevation_m": 58.54509920659717,
   "start_xy": [
    224280.63653689183,
    238348.05692632045
   ],
   "end_xy": [
    224277.9757790983,
    238349.4423457245
   ]
  }
 },
 "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": 0.007,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.021,
   "windows_resited": [
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.725,
   "obstruction_max_height_m": 29.28,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    14.0
   ],
   [
    410.0,
    440.0
   ]
  ],
  "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/wales/dtm_1m/wg_del_14_224238_20210210dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_14_224239_20210210dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_6_223238_20210210dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_6_223239_20210210dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:06:20+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_14_224238_20210210dtm.tif",
   "wg_del_14_224239_20210210dtm.tif",
   "wg_del_6_223238_20210210dtm.tif",
   "wg_del_6_223239_20210210dtm.tif"
  ],
  "elevation_capture_dates": [
   "11-02-2021"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cwm-ffynnonau",
  "county": "Sir Benfro - Pembrokeshire"
 }
}