{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.7025, -3.6630)",
 "slug": "discovered-lane-52-7025-3-6630",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.83495865454995,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1371.0,
   "end_distance_m": 1373.0,
   "start_elevation_m": 179.1412522977465,
   "end_elevation_m": 179.7979514708375,
   "min_gradient_pct": -66.02027505184864,
   "suppressed_max_gradient_pct": 110.6226209346886,
   "suppressed_location_m": [
    15.0,
    17.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.941279021781497,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1370.0,
   "end_distance_m": 1373.0,
   "start_elevation_m": 178.89971310018404,
   "end_elevation_m": 179.7979514708375,
   "min_gradient_pct": -62.663061593702686,
   "suppressed_max_gradient_pct": 95.00665002718307,
   "suppressed_location_m": [
    15.0,
    18.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.72722458405326,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1369.0,
   "end_distance_m": 1374.0,
   "start_elevation_m": 178.59990510477635,
   "end_elevation_m": 179.98626633397902,
   "min_gradient_pct": -54.92271197758669,
   "suppressed_max_gradient_pct": 96.23928017873169,
   "suppressed_location_m": [
    15.0,
    20.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.75577424595093,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1365.0,
   "end_distance_m": 1375.0,
   "start_elevation_m": 177.80957667219425,
   "end_elevation_m": 180.18515409678935,
   "min_gradient_pct": -28.985762384945133,
   "suppressed_max_gradient_pct": 71.79122314039759,
   "suppressed_location_m": [
    13.0,
    23.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.737077187815572,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1365.0,
   "end_distance_m": 1385.0,
   "start_elevation_m": 177.80957667219425,
   "end_elevation_m": 182.15699210975737,
   "min_gradient_pct": -2.253313088272506,
   "suppressed_max_gradient_pct": 36.49337541980444,
   "suppressed_location_m": [
    13.0,
    33.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.953861193617286,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1350.0,
   "end_distance_m": 1375.0,
   "start_elevation_m": 174.94668879838503,
   "end_elevation_m": 180.18515409678935,
   "min_gradient_pct": -1.4663939268073136,
   "suppressed_max_gradient_pct": 29.652449712920657,
   "suppressed_location_m": [
    13.0,
    38.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.15939548302032,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1345.0,
   "end_distance_m": 1395.0,
   "start_elevation_m": 174.0945575059072,
   "end_elevation_m": 183.67425524741736,
   "min_gradient_pct": 0.8504325173737755
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.828239909242,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1346.0,
   "end_distance_m": 1446.0,
   "start_elevation_m": 174.2574658691641,
   "end_elevation_m": 192.0857057784061,
   "min_gradient_pct": 1.7463779694328139
  }
 ],
 "shape": {
  "ascent_concentration": 0.375,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 138.0,
  "shape_class": "sustained"
 },
 "length_m": 1518.9472392577552,
 "start_elevation_m": 92.11171013238112,
 "end_elevation_m": 197.8940118455074,
 "endpoint_gain_m": 105.78230171312629,
 "overall_gradient_pct": 6.964185389666174,
 "accumulated_ascent_m": 110.62525600713971,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.72722458405326,
   "start_distance_m": 1369.0,
   "end_distance_m": 1374.0,
   "midpoint_distance_m": 1371.5,
   "start_elevation_m": 178.59990510477635,
   "end_elevation_m": 179.98626633397902,
   "start_xy": [
    288206.4543054649,
    312755.1917924512
   ],
   "end_xy": [
    288202.84024957154,
    312758.6470203742
   ]
  },
  "max_10m": {
   "gradient_pct": 23.75577424595093,
   "start_distance_m": 1365.0,
   "end_distance_m": 1375.0,
   "midpoint_distance_m": 1370.0,
   "start_elevation_m": 177.80957667219425,
   "end_elevation_m": 180.18515409678935,
   "start_xy": [
    288209.3455501796,
    312752.4276101128
   ],
   "end_xy": [
    288202.1174383929,
    312759.33806595876
   ]
  },
  "max_20m": {
   "gradient_pct": 21.737077187815572,
   "start_distance_m": 1365.0,
   "end_distance_m": 1385.0,
   "midpoint_distance_m": 1375.0,
   "start_elevation_m": 177.80957667219425,
   "end_elevation_m": 182.15699210975737,
   "start_xy": [
    288209.3455501796,
    312752.4276101128
   ],
   "end_xy": [
    288198.21386141103,
    312768.1563553242
   ]
  },
  "max_25m": {
   "gradient_pct": 20.953861193617286,
   "start_distance_m": 1350.0,
   "end_distance_m": 1375.0,
   "midpoint_distance_m": 1362.5,
   "start_elevation_m": 174.94668879838503,
   "end_elevation_m": 180.18515409678935,
   "start_xy": [
    288213.2431997672,
    312739.2516929302
   ],
   "end_xy": [
    288202.1174383929,
    312759.33806595876
   ]
  },
  "max_50m": {
   "gradient_pct": 19.15939548302032,
   "start_distance_m": 1345.0,
   "end_distance_m": 1395.0,
   "midpoint_distance_m": 1370.0,
   "start_elevation_m": 174.0945575059072,
   "end_elevation_m": 183.67425524741736,
   "start_xy": [
    288211.34770900937,
    312735.21714683075
   ],
   "end_xy": [
    288195.8941876012,
    312777.8835909755
   ]
  },
  "max_100m": {
   "gradient_pct": 17.828239909242,
   "start_distance_m": 1346.0,
   "end_distance_m": 1446.0,
   "midpoint_distance_m": 1396.0,
   "start_elevation_m": 174.2574658691641,
   "end_elevation_m": 192.0857057784061,
   "start_xy": [
    288212.18377578957,
    312735.76577451784
   ],
   "end_xy": [
    288184.0638511712,
    312827.49249279714
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -54.92271197758669,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 92.11171013238112,
   "end_elevation_m": 89.36557453350179,
   "start_xy": [
    287018.292,
    313084.131
   ],
   "end_xy": [
    287022.9874623366,
    313085.8493228583
   ]
  },
  "min_10m": {
   "gradient_pct": -28.985762384945133,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 92.11171013238112,
   "end_elevation_m": 89.2131338938866,
   "start_xy": [
    287018.292,
    313084.131
   ],
   "end_xy": [
    287027.68292467325,
    313087.56764571666
   ]
  },
  "min_20m": {
   "gradient_pct": -2.253313088272506,
   "start_distance_m": 1292.0,
   "end_distance_m": 1312.0,
   "midpoint_distance_m": 1302.0,
   "start_elevation_m": 172.37788534003195,
   "end_elevation_m": 171.92722272237745,
   "start_xy": [
    288162.13647681335,
    312742.09279127815
   ],
   "end_xy": [
    288180.95485116576,
    312735.32014137326
   ]
  },
  "min_25m": {
   "gradient_pct": -1.4663939268073136,
   "start_distance_m": 1292.0,
   "end_distance_m": 1317.0,
   "midpoint_distance_m": 1304.5,
   "start_elevation_m": 172.37788534003195,
   "end_elevation_m": 172.01128685833012,
   "start_xy": [
    288162.13647681335,
    312742.09279127815
   ],
   "end_xy": [
    288185.70468881726,
    312733.7712092199
   ]
  },
  "min_50m": {
   "gradient_pct": 0.8504325173737755,
   "start_distance_m": 686.0,
   "end_distance_m": 736.0,
   "midpoint_distance_m": 711.0,
   "start_elevation_m": 121.53610160880434,
   "end_elevation_m": 121.96131786749123,
   "start_xy": [
    287631.77734463173,
    313010.6894074037
   ],
   "end_xy": [
    287675.0824637263,
    312985.82108825236
   ]
  },
  "min_100m": {
   "gradient_pct": 1.7463779694328139,
   "start_distance_m": 636.0,
   "end_distance_m": 736.0,
   "midpoint_distance_m": 686.0,
   "start_elevation_m": 120.21493989805842,
   "end_elevation_m": 121.96131786749123,
   "start_xy": [
    287588.2249074651,
    313035.1519278097
   ],
   "end_xy": [
    287675.0824637263,
    312985.82108825236
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.83495865454995,
   "start_distance_m": 1371.0,
   "end_distance_m": 1373.0,
   "midpoint_distance_m": 1372.0,
   "start_elevation_m": 179.1412522977465,
   "end_elevation_m": 179.7979514708375,
   "start_xy": [
    288205.00868310756,
    312756.5738836204
   ],
   "end_xy": [
    288203.5630607502,
    312757.95597478957
   ]
  },
  "max_3m": {
   "gradient_pct": 29.941279021781497,
   "start_distance_m": 1370.0,
   "end_distance_m": 1373.0,
   "midpoint_distance_m": 1371.5,
   "start_elevation_m": 178.89971310018404,
   "end_elevation_m": 179.7979514708375,
   "start_xy": [
    288205.7314942862,
    312755.8828380358
   ],
   "end_xy": [
    288203.5630607502,
    312757.95597478957
   ]
  }
 },
 "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": 0.026,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.562,
   "obstruction_max_height_m": 24.04,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    39.0
   ]
  ],
  "review": [],
  "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_286312_20220114dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_22_286313_20220114dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_22_287312_20220114dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_22_287313_20220114dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_22_288312_20220114dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_22_288313_20220114dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:12:28+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_286312_20220114dtm.tif",
   "wg_del_22_286313_20220114dtm.tif",
   "wg_del_22_287312_20220114dtm.tif",
   "wg_del_22_287313_20220114dtm.tif",
   "wg_del_22_288312_20220114dtm.tif",
   "wg_del_22_288313_20220114dtm.tif"
  ],
  "elevation_capture_dates": [
   "14-01-2022"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cwm-Cewydd",
  "county": "Gwynedd - Gwynedd"
 }
}