{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.9814, -4.0391)",
 "slug": "discovered-lane-52-9814-4-0391",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 39.28250824489403,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 5.0,
   "end_distance_m": 7.0,
   "start_elevation_m": 51.87287798111919,
   "end_elevation_m": 52.65852814601707,
   "min_gradient_pct": -114.58930511182785,
   "suppressed_max_gradient_pct": 83.60196469786487,
   "suppressed_location_m": [
    1085.0,
    1087.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.42415570017757,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 5.0,
   "end_distance_m": 8.0,
   "start_elevation_m": 51.87287798111919,
   "end_elevation_m": 52.935602652124516,
   "min_gradient_pct": -102.1431657591279,
   "suppressed_max_gradient_pct": 77.12858134227692,
   "suppressed_location_m": [
    1084.0,
    1087.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 30.99383202914055,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 5.0,
   "end_distance_m": 10.0,
   "start_elevation_m": 51.87287798111919,
   "end_elevation_m": 53.422569582576216,
   "min_gradient_pct": -63.95285449801577,
   "suppressed_max_gradient_pct": 54.81966292200809,
   "suppressed_location_m": [
    1084.0,
    1089.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.91093531898659,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 5.0,
   "end_distance_m": 15.0,
   "start_elevation_m": 51.87287798111919,
   "end_elevation_m": 54.56397151301785,
   "min_gradient_pct": -32.61597861999917,
   "suppressed_max_gradient_pct": 36.42929496523749,
   "suppressed_location_m": [
    2477.0,
    2487.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.317587516062375,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 3.0,
   "end_distance_m": 23.0,
   "start_elevation_m": 51.58541867248496,
   "end_elevation_m": 56.24893617569744,
   "min_gradient_pct": -19.9250200115965
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.712346291682934,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2229.0,
   "end_distance_m": 2254.0,
   "start_elevation_m": 183.382145357387,
   "end_elevation_m": 189.06023193030774,
   "min_gradient_pct": -17.52852812415142
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.739292654414385,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2227.0,
   "end_distance_m": 2277.0,
   "start_elevation_m": 183.09412419943087,
   "end_elevation_m": 193.46377052663806,
   "min_gradient_pct": -9.626095999774748
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.819293855502565,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2210.0,
   "end_distance_m": 2310.0,
   "start_elevation_m": 179.97690478232326,
   "end_elevation_m": 199.79619863782582,
   "min_gradient_pct": -5.579138888101752
  }
 ],
 "shape": {
  "ascent_concentration": 0.412,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 203.0,
  "shape_class": "sustained"
 },
 "length_m": 2873.6189944193866,
 "start_elevation_m": 51.415730691908664,
 "end_elevation_m": 255.1420001515504,
 "endpoint_gain_m": 203.72626945964174,
 "overall_gradient_pct": 7.089536568879916,
 "accumulated_ascent_m": 234.64999472258648,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 30.99383202914055,
   "start_distance_m": 5.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 7.5,
   "start_elevation_m": 51.87287798111919,
   "end_elevation_m": 53.422569582576216,
   "start_xy": [
    262576.2214436749,
    343609.8325028872
   ],
   "end_xy": [
    262575.3168873498,
    343604.91500577435
   ]
  },
  "max_10m": {
   "gradient_pct": 26.91093531898659,
   "start_distance_m": 5.0,
   "end_distance_m": 15.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 51.87287798111919,
   "end_elevation_m": 54.56397151301785,
   "start_xy": [
    262576.2214436749,
    343609.8325028872
   ],
   "end_xy": [
    262574.23708558246,
    343600.0334767758
   ]
  },
  "max_20m": {
   "gradient_pct": 23.317587516062375,
   "start_distance_m": 3.0,
   "end_distance_m": 23.0,
   "midpoint_distance_m": 13.0,
   "start_elevation_m": 51.58541867248496,
   "end_elevation_m": 56.24893617569744,
   "start_xy": [
    262576.5832662049,
    343611.7995017323
   ],
   "end_xy": [
    262572.4682017328,
    343592.2314866498
   ]
  },
  "max_25m": {
   "gradient_pct": 22.712346291682934,
   "start_distance_m": 2229.0,
   "end_distance_m": 2254.0,
   "midpoint_distance_m": 2241.5,
   "start_elevation_m": 183.382145357387,
   "end_elevation_m": 189.06023193030774,
   "start_xy": [
    263357.0145966891,
    344149.2541917524
   ],
   "end_xy": [
    263371.3439734056,
    344128.7683682904
   ]
  },
  "max_50m": {
   "gradient_pct": 20.739292654414385,
   "start_distance_m": 2227.0,
   "end_distance_m": 2277.0,
   "midpoint_distance_m": 2252.0,
   "start_elevation_m": 183.09412419943087,
   "end_elevation_m": 193.46377052663806,
   "start_xy": [
    263355.8682465518,
    344150.89305762935
   ],
   "end_xy": [
    263384.52699998475,
    344109.9214107053
   ]
  },
  "max_100m": {
   "gradient_pct": 19.819293855502565,
   "start_distance_m": 2210.0,
   "end_distance_m": 2310.0,
   "midpoint_distance_m": 2260.0,
   "start_elevation_m": 179.97690478232326,
   "end_elevation_m": 199.79619863782582,
   "start_xy": [
    263345.3740722883,
    344164.2571981123
   ],
   "end_xy": [
    263404.5344840795,
    344083.6827406821
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -63.95285449801577,
   "start_distance_m": 2472.0,
   "end_distance_m": 2477.0,
   "midpoint_distance_m": 2474.5,
   "start_elevation_m": 213.39963095963034,
   "end_elevation_m": 210.20198823472955,
   "start_xy": [
    263517.752423047,
    343981.1321245387
   ],
   "end_xy": [
    263521.01719212136,
    343977.374991566
   ]
  },
  "min_10m": {
   "gradient_pct": -32.61597861999917,
   "start_distance_m": 2467.0,
   "end_distance_m": 2477.0,
   "midpoint_distance_m": 2472.0,
   "start_elevation_m": 213.46358609672947,
   "end_elevation_m": 210.20198823472955,
   "start_xy": [
    263512.8570400424,
    343981.7982818408
   ],
   "end_xy": [
    263521.01719212136,
    343977.374991566
   ]
  },
  "min_20m": {
   "gradient_pct": -19.9250200115965,
   "start_distance_m": 2457.0,
   "end_distance_m": 2477.0,
   "midpoint_distance_m": 2467.0,
   "start_elevation_m": 214.18699223704886,
   "end_elevation_m": 210.20198823472955,
   "start_xy": [
    263503.1325753499,
    343983.9277980512
   ],
   "end_xy": [
    263521.01719212136,
    343977.374991566
   ]
  },
  "min_25m": {
   "gradient_pct": -17.52852812415142,
   "start_distance_m": 2452.0,
   "end_distance_m": 2477.0,
   "midpoint_distance_m": 2464.5,
   "start_elevation_m": 214.5841202657674,
   "end_elevation_m": 210.20198823472955,
   "start_xy": [
    263498.1539669529,
    343984.38981366705
   ],
   "end_xy": [
    263521.01719212136,
    343977.374991566
   ]
  },
  "min_50m": {
   "gradient_pct": -9.626095999774748,
   "start_distance_m": 1033.0,
   "end_distance_m": 1083.0,
   "midpoint_distance_m": 1058.0,
   "start_elevation_m": 106.32336118758303,
   "end_elevation_m": 101.51031318769566,
   "start_xy": [
    263047.6987521407,
    344061.31935082143
   ],
   "end_xy": [
    263070.64268124406,
    344105.22144474863
   ]
  },
  "min_100m": {
   "gradient_pct": -5.579138888101752,
   "start_distance_m": 984.0,
   "end_distance_m": 1084.0,
   "midpoint_distance_m": 1034.0,
   "start_elevation_m": 107.02747716497862,
   "end_elevation_m": 101.44833827687687,
   "start_xy": [
    263020.2026247529,
    344020.7856610524
   ],
   "end_xy": [
    263070.76215847785,
    344106.2142816892
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 39.28250824489403,
   "start_distance_m": 5.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 6.0,
   "start_elevation_m": 51.87287798111919,
   "end_elevation_m": 52.65852814601707,
   "start_xy": [
    262576.2214436749,
    343609.8325028872
   ],
   "end_xy": [
    262575.85962114483,
    343607.865504042
   ]
  },
  "max_3m": {
   "gradient_pct": 35.42415570017757,
   "start_distance_m": 5.0,
   "end_distance_m": 8.0,
   "midpoint_distance_m": 6.5,
   "start_elevation_m": 51.87287798111919,
   "end_elevation_m": 52.935602652124516,
   "start_xy": [
    262576.2214436749,
    343609.8325028872
   ],
   "end_xy": [
    262575.6787098798,
    343606.88200461946
   ]
  }
 },
 "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": 0.017,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.39,
   "obstruction_max_height_m": 24.52,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20
   ]
  },
  "excluded_ranges_m": [
   [
    1075.0,
    1099.0
   ],
   [
    2468.0,
    2490.0
   ]
  ],
  "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_20_262343_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_262344_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_263343_20220111dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_20_263344_20220111dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:05:00+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_20_262343_20220111dtm.tif",
   "wg_del_20_262344_20220111dtm.tif",
   "wg_del_20_263343_20220111dtm.tif",
   "wg_del_20_263344_20220111dtm.tif"
  ],
  "elevation_capture_dates": [
   "11-01-2022"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Ceunant C\u00f4ch",
  "county": "Gwynedd - Gwynedd"
 }
}