{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (52.0027, -4.6093)",
 "slug": "discovered-lane-52-0027-4-6093",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 20.134999999999792,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 161.0,
   "end_distance_m": 163.0,
   "start_elevation_m": 125.4893,
   "end_elevation_m": 125.892,
   "min_gradient_pct": -8.58000000000061,
   "suppressed_max_gradient_pct": 48.245000000000005,
   "suppressed_location_m": [
    175.0,
    177.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 19.63666666666673,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 160.0,
   "end_distance_m": 163.0,
   "start_elevation_m": 125.3029,
   "end_elevation_m": 125.892,
   "min_gradient_pct": -8.403333333333762,
   "suppressed_max_gradient_pct": 45.2400000000002,
   "suppressed_location_m": [
    175.0,
    178.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 19.062000000000126,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 161.0,
   "end_distance_m": 166.0,
   "start_elevation_m": 125.4893,
   "end_elevation_m": 126.4424,
   "min_gradient_pct": -7.205999999999904,
   "suppressed_max_gradient_pct": 35.31199999999984,
   "suppressed_location_m": [
    174.0,
    179.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 18.86099999999999,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 154.0,
   "end_distance_m": 164.0,
   "start_elevation_m": 124.1892,
   "end_elevation_m": 126.0753,
   "min_gradient_pct": -6.548999999999978,
   "suppressed_max_gradient_pct": 26.222000000000065,
   "suppressed_location_m": [
    173.0,
    183.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 18.003500000000017,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 148.0,
   "end_distance_m": 168.0,
   "start_elevation_m": 123.1781,
   "end_elevation_m": 126.7788,
   "min_gradient_pct": -4.654000000000025,
   "suppressed_max_gradient_pct": 22.042499999999947,
   "suppressed_location_m": [
    159.0,
    179.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 17.846799999999973,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 142.0,
   "end_distance_m": 167.0,
   "start_elevation_m": 122.1559,
   "end_elevation_m": 126.6176,
   "min_gradient_pct": -4.451999999999998,
   "suppressed_max_gradient_pct": 21.42999999999995,
   "suppressed_location_m": [
    154.0,
    179.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.402199999999993,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 121.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 119.0481,
   "end_elevation_m": 127.2492,
   "min_gradient_pct": -4.059199999999976,
   "suppressed_max_gradient_pct": 19.192800000000005,
   "suppressed_location_m": [
    151.0,
    201.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.986599999999996,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "texture_excluded"
   ],
   "start_distance_m": 71.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 113.2626,
   "end_elevation_m": 127.2492,
   "min_gradient_pct": -2.9940999999999747,
   "suppressed_max_gradient_pct": 16.78450000000001,
   "suppressed_location_m": [
    104.0,
    204.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.485,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 160.0,
  "shape_class": "stepped"
 },
 "length_m": 363.6554757558264,
 "start_elevation_m": 106.04509750228894,
 "end_elevation_m": 135.0642390074146,
 "endpoint_gain_m": 29.019141505125674,
 "overall_gradient_pct": 7.979844506620422,
 "accumulated_ascent_m": 32.41464089595473,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 19.062000000000126,
   "start_distance_m": 161.0,
   "end_distance_m": 166.0,
   "midpoint_distance_m": 163.5,
   "start_elevation_m": 125.4893,
   "end_elevation_m": 126.4424,
   "start_xy": [
    221000.094,
    236866.808
   ],
   "end_xy": [
    220999.808,
    236861.816
   ]
  },
  "max_10m": {
   "gradient_pct": 18.86099999999999,
   "start_distance_m": 154.0,
   "end_distance_m": 164.0,
   "midpoint_distance_m": 159.0,
   "start_elevation_m": 124.1892,
   "end_elevation_m": 126.0753,
   "start_xy": [
    221000.495,
    236873.797
   ],
   "end_xy": [
    220999.922,
    236863.813
   ]
  },
  "max_20m": {
   "gradient_pct": 18.003500000000017,
   "start_distance_m": 148.0,
   "end_distance_m": 168.0,
   "midpoint_distance_m": 158.0,
   "start_elevation_m": 123.1781,
   "end_elevation_m": 126.7788,
   "start_xy": [
    221000.839,
    236879.787
   ],
   "end_xy": [
    220999.693,
    236859.82
   ]
  },
  "max_25m": {
   "gradient_pct": 17.846799999999973,
   "start_distance_m": 142.0,
   "end_distance_m": 167.0,
   "midpoint_distance_m": 154.5,
   "start_elevation_m": 122.1559,
   "end_elevation_m": 126.6176,
   "start_xy": [
    221001.183,
    236885.777
   ],
   "end_xy": [
    220999.75,
    236860.818
   ]
  },
  "max_50m": {
   "gradient_pct": 16.402199999999993,
   "start_distance_m": 121.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 146.0,
   "start_elevation_m": 119.0481,
   "end_elevation_m": 127.2492,
   "start_xy": [
    221002.387,
    236906.742
   ],
   "end_xy": [
    220999.521,
    236856.824
   ]
  },
  "max_100m": {
   "gradient_pct": 13.986599999999996,
   "start_distance_m": 71.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 121.0,
   "start_elevation_m": 113.2626,
   "end_elevation_m": 127.2492,
   "start_xy": [
    221005.252,
    236956.66
   ],
   "end_xy": [
    220999.521,
    236856.824
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.205999999999904,
   "start_distance_m": 226.0,
   "end_distance_m": 231.0,
   "midpoint_distance_m": 228.5,
   "start_elevation_m": 134.7706,
   "end_elevation_m": 134.4103,
   "start_xy": [
    221013.587,
    236815.692
   ],
   "end_xy": [
    221018.457,
    236816.828
   ]
  },
  "min_10m": {
   "gradient_pct": -6.548999999999978,
   "start_distance_m": 223.0,
   "end_distance_m": 233.0,
   "midpoint_distance_m": 228.0,
   "start_elevation_m": 134.9644,
   "end_elevation_m": 134.3095,
   "start_xy": [
    221010.666,
    236815.011
   ],
   "end_xy": [
    221020.404,
    236817.283
   ]
  },
  "min_20m": {
   "gradient_pct": -4.654000000000025,
   "start_distance_m": 288.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 298.0,
   "start_elevation_m": 132.7123,
   "end_elevation_m": 131.7815,
   "start_xy": [
    221073.966,
    236829.778
   ],
   "end_xy": [
    221093.629,
    236833.154
   ]
  },
  "min_25m": {
   "gradient_pct": -4.451999999999998,
   "start_distance_m": 288.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 300.5,
   "start_elevation_m": 132.7123,
   "end_elevation_m": 131.5993,
   "start_xy": [
    221073.966,
    236829.778
   ],
   "end_xy": [
    221098.214,
    236833.163
   ]
  },
  "min_50m": {
   "gradient_pct": -4.059199999999976,
   "start_distance_m": 262.0,
   "end_distance_m": 312.0,
   "midpoint_distance_m": 287.0,
   "start_elevation_m": 133.6516,
   "end_elevation_m": 131.622,
   "start_xy": [
    221048.646,
    236823.871
   ],
   "end_xy": [
    221097.614,
    236833.501
   ]
  },
  "min_100m": {
   "gradient_pct": -2.9940999999999747,
   "start_distance_m": 217.0,
   "end_distance_m": 317.0,
   "midpoint_distance_m": 267.0,
   "start_elevation_m": 134.7667,
   "end_elevation_m": 131.7726,
   "start_xy": [
    221004.819,
    236815.041
   ],
   "end_xy": [
    221098.14,
    236829.164
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 20.134999999999792,
   "start_distance_m": 161.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 162.0,
   "start_elevation_m": 125.4893,
   "end_elevation_m": 125.892,
   "start_xy": [
    221000.094,
    236866.808
   ],
   "end_xy": [
    220999.979,
    236864.811
   ]
  },
  "max_3m": {
   "gradient_pct": 19.63666666666673,
   "start_distance_m": 160.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 161.5,
   "start_elevation_m": 125.3029,
   "end_elevation_m": 125.892,
   "start_xy": [
    221000.151,
    236867.806
   ],
   "end_xy": [
    220999.979,
    236864.811
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.09,
   "obstruction_max_height_m": 11.9,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ],
  "texture_suppression": {
   "masked_fraction": 0.027,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 5.0,
     "start_m": 174.0,
     "end_m": 179.0,
     "raw_pct": 35.31,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "excluded_ranges_m": [
   [
    172.0,
    181.0
   ]
  ]
 },
 "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_220236_20210210dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_6_220237_20210210dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_6_221236_20210210dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_6_221237_20210210dtm.tif"
  ],
  "calculated_at": "2026-09-04T22:09:31+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_220236_20210210dtm.tif",
   "wg_del_6_220237_20210210dtm.tif",
   "wg_del_6_221236_20210210dtm.tif",
   "wg_del_6_221237_20210210dtm.tif"
  ],
  "elevation_capture_dates": [
   "11-02-2021"
  ],
  "climb_origin": "discovered",
  "qa_replayed": {
   "on": "2026-09-20",
   "rule": "window texture with the sampling-stability gate (retro suppression-verdicts-stability; Peter 2026-09-20)",
   "retro": [
    "window-texture",
    "hump-advisory",
    "suppression-verdict-stability"
   ],
   "method": "replayed over the page's own published profile \u2014 no raster, no re-line, no re-resample",
   "script": "scripts/texture_sweep_apply.py",
   "code_git_sha": "fd294479d730",
   "published_max25_pct": 21.43,
   "max25_pct": 17.85,
   "move_pp": -3.58,
   "reasons": "short-step"
  },
  "remeasured": {
   "on": "2026-09-20",
   "why": "texture replay (texture-replay)",
   "published_max25_pct": 21.43,
   "max25_pct": 17.85
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cwm Rhew-erwyll",
  "county": "Sir Benfro - Pembrokeshire"
 }
}