{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (51.8877, -4.7413)",
 "slug": "discovered-lane-51-8877-4-7413",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.52605669072295,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 232.0,
   "end_distance_m": 234.0,
   "start_elevation_m": 97.36980865113959,
   "end_elevation_m": 98.12032978495405,
   "min_gradient_pct": -11.036767287062332,
   "suppressed_max_gradient_pct": 57.30093725623675,
   "suppressed_location_m": [
    239.0,
    241.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 34.22217103209325,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 232.0,
   "end_distance_m": 235.0,
   "start_elevation_m": 97.36980865113959,
   "end_elevation_m": 98.39647378210239,
   "min_gradient_pct": -10.100654499710041,
   "suppressed_max_gradient_pct": 49.46885850542344,
   "suppressed_location_m": [
    239.0,
    242.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.22046939421307,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 231.0,
   "end_distance_m": 236.0,
   "start_elevation_m": 97.25529931592534,
   "end_elevation_m": 98.716322785636,
   "min_gradient_pct": -9.711970856321841,
   "suppressed_max_gradient_pct": 38.89630334015749,
   "suppressed_location_m": [
    238.0,
    243.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.612904862840054,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 32.0,
   "end_distance_m": 42.0,
   "start_elevation_m": 67.04182280870998,
   "end_elevation_m": 69.40311329499399,
   "min_gradient_pct": -9.453855162437605,
   "suppressed_max_gradient_pct": 29.719983119133673,
   "suppressed_location_m": [
    232.0,
    242.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.21226411155824,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 290.0,
   "end_distance_m": 310.0,
   "start_elevation_m": 105.69937730059262,
   "end_elevation_m": 109.94183012290426,
   "min_gradient_pct": -9.138478625055768,
   "suppressed_max_gradient_pct": 23.96963941140001,
   "suppressed_location_m": [
    223.0,
    243.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.269769160645353,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 286.0,
   "end_distance_m": 311.0,
   "start_elevation_m": 105.02924639984953,
   "end_elevation_m": 110.09668869001086,
   "min_gradient_pct": -8.723059202124773,
   "suppressed_max_gradient_pct": 22.966715997430985,
   "suppressed_location_m": [
    218.0,
    243.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.04483200569686,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 125.0,
   "end_distance_m": 175.0,
   "start_elevation_m": 79.16523496602196,
   "end_elevation_m": 88.18765096887039,
   "min_gradient_pct": -7.783370981171686,
   "suppressed_max_gradient_pct": 19.26434465670684,
   "suppressed_location_m": [
    202.0,
    252.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.962184479936795,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 99.0,
   "end_distance_m": 199.0,
   "start_elevation_m": 75.02868491166532,
   "end_elevation_m": 91.99086939160212,
   "min_gradient_pct": -6.55788260892507,
   "suppressed_max_gradient_pct": 18.414847249366446,
   "suppressed_location_m": [
    151.0,
    251.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.575,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 183.0,
  "shape_class": "stepped"
 },
 "length_m": 1780.411988442511,
 "start_elevation_m": 64.30014282566087,
 "end_elevation_m": 157.7097025394438,
 "endpoint_gain_m": 93.40955971378294,
 "overall_gradient_pct": 5.2465137462648075,
 "accumulated_ascent_m": 109.36766259804786,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.22046939421307,
   "start_distance_m": 231.0,
   "end_distance_m": 236.0,
   "midpoint_distance_m": 233.5,
   "start_elevation_m": 97.25529931592534,
   "end_elevation_m": 98.716322785636,
   "start_xy": [
    211410.37819924153,
    224390.73823681002
   ],
   "end_xy": [
    211411.23731600546,
    224385.81259792903
   ]
  },
  "max_10m": {
   "gradient_pct": 23.612904862840054,
   "start_distance_m": 32.0,
   "end_distance_m": 42.0,
   "midpoint_distance_m": 37.0,
   "start_elevation_m": 67.04182280870998,
   "end_elevation_m": 69.40311329499399,
   "start_xy": [
    211411.9641930574,
    224563.54609456297
   ],
   "end_xy": [
    211404.7713052717,
    224556.79068183448
   ]
  },
  "max_20m": {
   "gradient_pct": 21.21226411155824,
   "start_distance_m": 290.0,
   "end_distance_m": 310.0,
   "midpoint_distance_m": 300.0,
   "start_elevation_m": 105.69937730059262,
   "end_elevation_m": 109.94183012290426,
   "start_xy": [
    211412.87797535298,
    224332.04266711374
   ],
   "end_xy": [
    211410.57233788763,
    224312.2041662827
   ]
  },
  "max_25m": {
   "gradient_pct": 20.269769160645353,
   "start_distance_m": 286.0,
   "end_distance_m": 311.0,
   "midpoint_distance_m": 298.5,
   "start_elevation_m": 105.02924639984953,
   "end_elevation_m": 110.09668869001086,
   "start_xy": [
    211413.05815123802,
    224336.03860713463
   ],
   "end_xy": [
    211410.35735152097,
    224311.2275492328
   ]
  },
  "max_50m": {
   "gradient_pct": 18.04483200569686,
   "start_distance_m": 125.0,
   "end_distance_m": 175.0,
   "midpoint_distance_m": 150.0,
   "start_elevation_m": 79.16523496602196,
   "end_elevation_m": 88.18765096887039,
   "start_xy": [
    211385.38128411022,
    224476.6836066927
   ],
   "end_xy": [
    211401.91570696505,
    224445.36011875424
   ]
  },
  "max_100m": {
   "gradient_pct": 16.962184479936795,
   "start_distance_m": 99.0,
   "end_distance_m": 199.0,
   "midpoint_distance_m": 149.0,
   "start_elevation_m": 75.02868491166532,
   "end_elevation_m": 91.99086939160212,
   "start_xy": [
    211390.61763736553,
    224502.14254508782
   ],
   "end_xy": [
    211407.25177194393,
    224422.53052800352
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.711970856321841,
   "start_distance_m": 945.0,
   "end_distance_m": 950.0,
   "midpoint_distance_m": 947.5,
   "start_elevation_m": 136.98693495850782,
   "end_elevation_m": 136.50133641569172,
   "start_xy": [
    211552.3098087773,
    223758.75608938426
   ],
   "end_xy": [
    211552.5242460253,
    223753.760689834
   ]
  },
  "min_10m": {
   "gradient_pct": -9.453855162437605,
   "start_distance_m": 939.0,
   "end_distance_m": 949.0,
   "midpoint_distance_m": 944.0,
   "start_elevation_m": 137.53604853526227,
   "end_elevation_m": 136.5906630190185,
   "start_xy": [
    211552.0524840797,
    223764.75056884455
   ],
   "end_xy": [
    211552.4813585757,
    223754.75976974404
   ]
  },
  "min_20m": {
   "gradient_pct": -9.138478625055768,
   "start_distance_m": 935.0,
   "end_distance_m": 955.0,
   "midpoint_distance_m": 945.0,
   "start_elevation_m": 137.91379227911472,
   "end_elevation_m": 136.08609655410356,
   "start_xy": [
    211551.97202059973,
    223768.7489439051
   ],
   "end_xy": [
    211552.73868327332,
    223748.76529028374
   ]
  },
  "min_25m": {
   "gradient_pct": -8.723059202124773,
   "start_distance_m": 935.0,
   "end_distance_m": 960.0,
   "midpoint_distance_m": 947.5,
   "start_elevation_m": 137.91379227911472,
   "end_elevation_m": 135.73302747858352,
   "start_xy": [
    211551.97202059973,
    223768.7489439051
   ],
   "end_xy": [
    211552.9531205213,
    223743.7698907335
   ]
  },
  "min_50m": {
   "gradient_pct": -7.783370981171686,
   "start_distance_m": 918.0,
   "end_distance_m": 968.0,
   "midpoint_distance_m": 943.0,
   "start_elevation_m": 139.07964025117795,
   "end_elevation_m": 135.1879547605921,
   "start_xy": [
    211551.9684845302,
    223785.74870463606
   ],
   "end_xy": [
    211553.2962201181,
    223735.77725145308
   ]
  },
  "min_100m": {
   "gradient_pct": -6.55788260892507,
   "start_distance_m": 886.0,
   "end_distance_m": 986.0,
   "midpoint_distance_m": 936.0,
   "start_elevation_m": 140.64987855792157,
   "end_elevation_m": 134.0919959489965,
   "start_xy": [
    211559.60496921267,
    223816.4332984262
   ],
   "end_xy": [
    211555.57776545503,
    223717.94367344317
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.52605669072295,
   "start_distance_m": 232.0,
   "end_distance_m": 234.0,
   "midpoint_distance_m": 233.0,
   "start_elevation_m": 97.36980865113959,
   "end_elevation_m": 98.12032978495405,
   "start_xy": [
    211410.5500225943,
    224389.75310903383
   ],
   "end_xy": [
    211410.89366929987,
    224387.78285348142
   ]
  },
  "max_3m": {
   "gradient_pct": 34.22217103209325,
   "start_distance_m": 232.0,
   "end_distance_m": 235.0,
   "midpoint_distance_m": 233.5,
   "start_elevation_m": 97.36980865113959,
   "end_elevation_m": 98.39647378210239,
   "start_xy": [
    211410.5500225943,
    224389.75310903383
   ],
   "end_xy": [
    211411.06549265265,
    224386.79772570523
   ]
  }
 },
 "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": 0.003,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.021,
   "windows_resited": [
    10.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.258,
   "obstruction_max_height_m": 19.71,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    200.0,
    230.0
   ],
   [
    237.0,
    242.0
   ]
  ],
  "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_6_211223_20210210dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_6_211224_20210210dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_6_212223_20210210dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_6_212224_20210210dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:05:26+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_6_211223_20210210dtm.tif",
   "wg_del_6_211224_20210210dtm.tif",
   "wg_del_6_212223_20210210dtm.tif",
   "wg_del_6_212224_20210210dtm.tif"
  ],
  "elevation_capture_dates": [
   "10-02-2021"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Llanycefn",
  "county": "Sir Benfro - Pembrokeshire"
 }
}