{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (51.9484, -3.5377)",
 "slug": "discovered-lane-51-9484-3-5377",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 43.925317493670946,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 347.0,
   "end_distance_m": 349.0,
   "start_elevation_m": 188.69915540482546,
   "end_elevation_m": 189.57766175469888,
   "min_gradient_pct": -26.804657834811962
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.368081016978714,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 564.0,
   "end_distance_m": 567.0,
   "start_elevation_m": 213.03104185328723,
   "end_elevation_m": 214.1220842837966,
   "min_gradient_pct": -26.61360765372744
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.6615097652209,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 562.0,
   "end_distance_m": 567.0,
   "start_elevation_m": 212.53900879553555,
   "end_elevation_m": 214.1220842837966,
   "min_gradient_pct": -25.05084570539509
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.820943626900146,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 578.0,
   "end_distance_m": 588.0,
   "start_elevation_m": 215.53770496027738,
   "end_elevation_m": 218.1197993229674,
   "min_gradient_pct": -20.476627490119768
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 19.71886690277543,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 573.0,
   "end_distance_m": 593.0,
   "start_elevation_m": 214.56088485428742,
   "end_elevation_m": 218.5046582348425,
   "min_gradient_pct": -13.943794890214605
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.29139661135423,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 563.0,
   "end_distance_m": 588.0,
   "start_elevation_m": 212.79695017012884,
   "end_elevation_m": 218.1197993229674,
   "min_gradient_pct": -12.7807842761448
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.38567454410395,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 538.0,
   "end_distance_m": 588.0,
   "start_elevation_m": 209.42696205091542,
   "end_elevation_m": 218.1197993229674,
   "min_gradient_pct": -8.721976075205987
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.499866978563915,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 488.0,
   "end_distance_m": 588.0,
   "start_elevation_m": 201.61993234440348,
   "end_elevation_m": 218.1197993229674,
   "min_gradient_pct": -3.9684745465416142
  }
 ],
 "shape": {
  "ascent_concentration": 0.511,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 154.0,
  "shape_class": "stepped"
 },
 "length_m": 1159.1356375607245,
 "start_elevation_m": 177.7769578164696,
 "end_elevation_m": 250.33925913154457,
 "endpoint_gain_m": 72.56230131507496,
 "overall_gradient_pct": 6.260035406018098,
 "accumulated_ascent_m": 82.86090860112324,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.6615097652209,
   "start_distance_m": 562.0,
   "end_distance_m": 567.0,
   "midpoint_distance_m": 564.5,
   "start_elevation_m": 212.53900879553555,
   "end_elevation_m": 214.1220842837966,
   "start_xy": [
    294779.28388565197,
    229175.98162913593
   ],
   "end_xy": [
    294774.59463482857,
    229174.24642692425
   ]
  },
  "max_10m": {
   "gradient_pct": 25.820943626900146,
   "start_distance_m": 578.0,
   "end_distance_m": 588.0,
   "midpoint_distance_m": 583.0,
   "start_elevation_m": 215.53770496027738,
   "end_elevation_m": 218.1197993229674,
   "start_xy": [
    294766.82341102045,
    229166.63662438552
   ],
   "end_xy": [
    294758.7665930518,
    229160.71313856888
   ]
  },
  "max_20m": {
   "gradient_pct": 19.71886690277543,
   "start_distance_m": 573.0,
   "end_distance_m": 593.0,
   "midpoint_distance_m": 583.0,
   "start_elevation_m": 214.56088485428742,
   "end_elevation_m": 218.5046582348425,
   "start_xy": [
    294770.7662694098,
    229169.68698013527
   ],
   "end_xy": [
    294754.4998465753,
    229158.11047623015
   ]
  },
  "max_25m": {
   "gradient_pct": 21.29139661135423,
   "start_distance_m": 563.0,
   "end_distance_m": 588.0,
   "midpoint_distance_m": 575.5,
   "start_elevation_m": 212.79695017012884,
   "end_elevation_m": 218.1197993229674,
   "start_xy": [
    294778.3460354873,
    229175.6345886936
   ],
   "end_xy": [
    294758.7665930518,
    229160.71313856888
   ]
  },
  "max_50m": {
   "gradient_pct": 17.38567454410395,
   "start_distance_m": 538.0,
   "end_distance_m": 588.0,
   "midpoint_distance_m": 563.0,
   "start_elevation_m": 209.42696205091542,
   "end_elevation_m": 218.1197993229674,
   "start_xy": [
    294803.02971205406,
    229178.20484615254
   ],
   "end_xy": [
    294758.7665930518,
    229160.71313856888
   ]
  },
  "max_100m": {
   "gradient_pct": 16.499866978563915,
   "start_distance_m": 488.0,
   "end_distance_m": 588.0,
   "midpoint_distance_m": 538.0,
   "start_elevation_m": 201.61993234440348,
   "end_elevation_m": 218.1197993229674,
   "start_xy": [
    294851.2420411786,
    229190.01672421003
   ],
   "end_xy": [
    294758.7665930518,
    229160.71313856888
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -25.05084570539509,
   "start_distance_m": 1077.0,
   "end_distance_m": 1082.0,
   "midpoint_distance_m": 1079.5,
   "start_elevation_m": 250.8117828535294,
   "end_elevation_m": 249.55924056825964,
   "start_xy": [
    294445.40979810135,
    228911.90698646588
   ],
   "end_xy": [
    294450.09795477736,
    228913.6451426675
   ]
  },
  "min_10m": {
   "gradient_pct": -20.476627490119768,
   "start_distance_m": 1074.0,
   "end_distance_m": 1084.0,
   "midpoint_distance_m": 1079.0,
   "start_elevation_m": 251.29388605035714,
   "end_elevation_m": 249.24622330134517,
   "start_xy": [
    294442.5969040957,
    228910.86409274495
   ],
   "end_xy": [
    294451.9732174478,
    228914.3404051481
   ]
  },
  "min_20m": {
   "gradient_pct": -13.943794890214605,
   "start_distance_m": 1067.0,
   "end_distance_m": 1087.0,
   "midpoint_distance_m": 1077.0,
   "start_elevation_m": 251.7320720106214,
   "end_elevation_m": 248.9433130325785,
   "start_xy": [
    294436.0334847493,
    228908.43067406272
   ],
   "end_xy": [
    294454.2118401673,
    228916.30064865618
   ]
  },
  "min_25m": {
   "gradient_pct": -12.7807842761448,
   "start_distance_m": 1061.0,
   "end_distance_m": 1086.0,
   "midpoint_distance_m": 1073.5,
   "start_elevation_m": 252.2127100973481,
   "end_elevation_m": 249.0175140283119,
   "start_xy": [
    294430.4076967381,
    228906.34488662082
   ],
   "end_xy": [
    294453.48949502094,
    228915.60911594576
   ]
  },
  "min_50m": {
   "gradient_pct": -8.721976075205987,
   "start_distance_m": 1041.0,
   "end_distance_m": 1091.0,
   "midpoint_distance_m": 1066.0,
   "start_elevation_m": 253.2095091688445,
   "end_elevation_m": 248.8485211312415,
   "start_xy": [
    294415.29022232065,
    228911.80142016907
   ],
   "end_xy": [
    294454.82696152525,
    228920.14218304167
   ]
  },
  "min_100m": {
   "gradient_pct": -3.9684745465416142,
   "start_distance_m": 1016.0,
   "end_distance_m": 1116.0,
   "midpoint_distance_m": 1066.0,
   "start_elevation_m": 252.78457429175887,
   "end_elevation_m": 248.81609974521726,
   "start_xy": [
    294415.1310336965,
    228935.5504810231
   ],
   "end_xy": [
    294446.69482563145,
    228943.72997883204
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 43.925317493670946,
   "start_distance_m": 347.0,
   "end_distance_m": 349.0,
   "midpoint_distance_m": 348.0,
   "start_elevation_m": 188.69915540482546,
   "end_elevation_m": 189.57766175469888,
   "start_xy": [
    294876.3262188098,
    229312.17429996785
   ],
   "end_xy": [
    294875.3822103523,
    229310.41110739973
   ]
  },
  "max_3m": {
   "gradient_pct": 36.368081016978714,
   "start_distance_m": 564.0,
   "end_distance_m": 567.0,
   "midpoint_distance_m": 565.5,
   "start_elevation_m": 213.03104185328723,
   "end_elevation_m": 214.1220842837966,
   "start_xy": [
    294777.4081853226,
    229175.28754825125
   ],
   "end_xy": [
    294774.59463482857,
    229174.24642692425
   ]
  }
 },
 "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": 0.005,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.074,
   "obstruction_max_height_m": 19.74,
   "flagged_windows_m": [
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    387.0,
    392.0
   ]
  ],
  "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_18_294228_20211201dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_18_294229_20211201dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_18_295228_20211201dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_18_295229_20211201dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:08:30+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_18_294228_20211201dtm.tif",
   "wg_del_18_294229_20211201dtm.tif",
   "wg_del_18_295228_20211201dtm.tif",
   "wg_del_18_295229_20211201dtm.tif"
  ],
  "elevation_capture_dates": [
   "01-12-2021"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cwm Lliw",
  "county": "Powys - Powys"
 }
}