{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.5025, -3.7260)",
 "slug": "discovered-lane-50-5025-3-7260",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.13999999999993,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure",
    "published_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 117.0,
   "end_distance_m": 119.0,
   "start_elevation_m": 73.81,
   "end_elevation_m": 74.5728,
   "min_gradient_pct": -53.04000000000002,
   "suppressed_max_gradient_pct": 62.46825718513307,
   "suppressed_location_m": [
    113.0,
    115.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.38666666666651,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "published_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1298.0,
   "end_distance_m": 1301.0,
   "start_elevation_m": 119.8799,
   "end_elevation_m": 120.8515,
   "min_gradient_pct": -52.81666666666638,
   "suppressed_max_gradient_pct": 60.68739472800549,
   "suppressed_location_m": [
    112.0,
    115.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.104000000000042,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure",
    "published_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 96.0,
   "end_distance_m": 101.0,
   "start_elevation_m": 69.5166,
   "end_elevation_m": 70.7718,
   "min_gradient_pct": -41.79200000000009,
   "suppressed_max_gradient_pct": 53.906895787276596,
   "suppressed_location_m": [
    112.0,
    117.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.093999999999994,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure",
    "published_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1331.0,
   "end_distance_m": 1341.0,
   "start_elevation_m": 123.1497,
   "end_elevation_m": 125.1591,
   "min_gradient_pct": -18.907000000000096,
   "suppressed_max_gradient_pct": 37.68373610404012,
   "suppressed_location_m": [
    109.0,
    119.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 18.77749999999999,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "published_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 129.0,
   "end_distance_m": 149.0,
   "start_elevation_m": 75.6987,
   "end_elevation_m": 79.4542,
   "min_gradient_pct": -8.9555,
   "suppressed_max_gradient_pct": 25.834494779112447,
   "suppressed_location_m": [
    112.0,
    132.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 18.518400000000042,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "published_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 123.0,
   "end_distance_m": 148.0,
   "start_elevation_m": 74.6428,
   "end_elevation_m": 79.2724,
   "min_gradient_pct": -8.552800000000047,
   "suppressed_max_gradient_pct": 24.306393212480945,
   "suppressed_location_m": [
    112.0,
    137.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 14.86439999999999,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "published_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1527.0,
   "end_distance_m": 1577.0,
   "start_elevation_m": 140.3363,
   "end_elevation_m": 147.7685,
   "min_gradient_pct": -7.412800000000004,
   "suppressed_max_gradient_pct": 22.944187988324558,
   "suppressed_location_m": [
    111.0,
    161.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.560399999999985,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "published_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1517.0,
   "end_distance_m": 1617.0,
   "start_elevation_m": 139.119,
   "end_elevation_m": 151.6794,
   "min_gradient_pct": -5.5291,
   "suppressed_max_gradient_pct": 17.94119118317149,
   "suppressed_location_m": [
    49.0,
    149.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.396,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 81.0,
  "shape_class": "sustained"
 },
 "length_m": 1814.932031342999,
 "start_elevation_m": 60.220423921661634,
 "end_elevation_m": 160.2408324275823,
 "endpoint_gain_m": 100.02040850592066,
 "overall_gradient_pct": 5.510972685401797,
 "accumulated_ascent_m": 122.56054364044792,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.104000000000042,
   "start_distance_m": 96.0,
   "end_distance_m": 101.0,
   "midpoint_distance_m": 98.5,
   "start_elevation_m": 69.5166,
   "end_elevation_m": 70.7718,
   "start_xy": [
    277628.36,
    68429.437
   ],
   "end_xy": [
    277623.458,
    68428.452
   ]
  },
  "max_10m": {
   "gradient_pct": 20.093999999999994,
   "start_distance_m": 1331.0,
   "end_distance_m": 1341.0,
   "midpoint_distance_m": 1336.0,
   "start_elevation_m": 123.1497,
   "end_elevation_m": 125.1591,
   "start_xy": [
    276697.715,
    69053.906
   ],
   "end_xy": [
    276690.721,
    69061.054
   ]
  },
  "max_20m": {
   "gradient_pct": 18.77749999999999,
   "start_distance_m": 129.0,
   "end_distance_m": 149.0,
   "midpoint_distance_m": 139.0,
   "start_elevation_m": 75.6987,
   "end_elevation_m": 79.4542,
   "start_xy": [
    277595.968,
    68423.643
   ],
   "end_xy": [
    277576.044,
    68425.392
   ]
  },
  "max_25m": {
   "gradient_pct": 18.518400000000042,
   "start_distance_m": 123.0,
   "end_distance_m": 148.0,
   "midpoint_distance_m": 135.5,
   "start_elevation_m": 74.6428,
   "end_elevation_m": 79.2724,
   "start_xy": [
    277601.89,
    68424.116
   ],
   "end_xy": [
    277577.041,
    68425.304
   ]
  },
  "max_50m": {
   "gradient_pct": 14.86439999999999,
   "start_distance_m": 1527.0,
   "end_distance_m": 1577.0,
   "midpoint_distance_m": 1552.0,
   "start_elevation_m": 140.3363,
   "end_elevation_m": 147.7685,
   "start_xy": [
    276572.051,
    69191.974
   ],
   "end_xy": [
    276560.544,
    69240.344
   ]
  },
  "max_100m": {
   "gradient_pct": 12.560399999999985,
   "start_distance_m": 1517.0,
   "end_distance_m": 1617.0,
   "midpoint_distance_m": 1567.0,
   "start_elevation_m": 139.119,
   "end_elevation_m": 151.6794,
   "start_xy": [
    276574.751,
    69182.349
   ],
   "end_xy": [
    276557.965,
    69280.229
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -41.79200000000009,
   "start_distance_m": 1160.0,
   "end_distance_m": 1165.0,
   "midpoint_distance_m": 1162.5,
   "start_elevation_m": 109.7629,
   "end_elevation_m": 107.6733,
   "start_xy": [
    276789.541,
    68912.976
   ],
   "end_xy": [
    276788.613,
    68917.889
   ]
  },
  "min_10m": {
   "gradient_pct": -18.907000000000096,
   "start_distance_m": 1159.0,
   "end_distance_m": 1169.0,
   "midpoint_distance_m": 1164.0,
   "start_elevation_m": 109.7989,
   "end_elevation_m": 107.9082,
   "start_xy": [
    276789.727,
    68911.993
   ],
   "end_xy": [
    276787.87,
    68921.819
   ]
  },
  "min_20m": {
   "gradient_pct": -8.9555,
   "start_distance_m": 835.0,
   "end_distance_m": 855.0,
   "midpoint_distance_m": 845.0,
   "start_elevation_m": 98.2161,
   "end_elevation_m": 96.425,
   "start_xy": [
    277087.905,
    68830.302
   ],
   "end_xy": [
    277067.953,
    68831.69
   ]
  },
  "min_25m": {
   "gradient_pct": -8.552800000000047,
   "start_distance_m": 832.0,
   "end_distance_m": 857.0,
   "midpoint_distance_m": 844.5,
   "start_elevation_m": 98.4304,
   "end_elevation_m": 96.2922,
   "start_xy": [
    277090.898,
    68830.094
   ],
   "end_xy": [
    277065.958,
    68831.829
   ]
  },
  "min_50m": {
   "gradient_pct": -7.412800000000004,
   "start_distance_m": 798.0,
   "end_distance_m": 848.0,
   "midpoint_distance_m": 823.0,
   "start_elevation_m": 100.6726,
   "end_elevation_m": 96.9662,
   "start_xy": [
    277124.356,
    68825.718
   ],
   "end_xy": [
    277074.936,
    68831.204
   ]
  },
  "min_100m": {
   "gradient_pct": -5.5291,
   "start_distance_m": 770.0,
   "end_distance_m": 870.0,
   "midpoint_distance_m": 820.0,
   "start_elevation_m": 101.2049,
   "end_elevation_m": 95.6758,
   "start_xy": [
    277150.374,
    68815.371
   ],
   "end_xy": [
    277052.989,
    68832.731
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.13999999999993,
   "start_distance_m": 117.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 118.0,
   "start_elevation_m": 73.81,
   "end_elevation_m": 74.5728,
   "start_xy": [
    277607.772,
    68425.299
   ],
   "end_xy": [
    277605.811,
    68424.905
   ]
  },
  "max_3m": {
   "gradient_pct": 32.38666666666651,
   "start_distance_m": 1298.0,
   "end_distance_m": 1301.0,
   "midpoint_distance_m": 1299.5,
   "start_elevation_m": 119.8799,
   "end_elevation_m": 120.8515,
   "start_xy": [
    276720.601,
    69030.132
   ],
   "end_xy": [
    276718.527,
    69032.3
   ]
  }
 },
 "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": 0.015,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.039,
   "obstruction_max_height_m": 12.6,
   "flagged_windows_m": [
    2,
    5,
    10
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    14.0
   ],
   [
    47.0,
    56.0
   ],
   [
    111.0,
    116.0
   ],
   [
    154.0,
    163.0
   ],
   [
    1039.0,
    1048.0
   ],
   [
    1122.0,
    1127.0
   ]
  ],
  "review": [],
  "extent": [
   "descends_at_end"
  ],
  "texture_suppression": {
   "masked_fraction": 0.031,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 3,
   "windows_masked": [
    {
     "window_m": 5.0,
     "start_m": 49.0,
     "end_m": 54.0,
     "raw_pct": 39.66,
     "reason": "hump+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 156.0,
     "end_m": 161.0,
     "raw_pct": 39.56,
     "reason": "hump+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 1041.0,
     "end_m": 1046.0,
     "raw_pct": 34.83,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  }
 },
 "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/england/bulk_dtm_1m/SX7565.tif"
  ],
  "calculated_at": "2026-09-05T01:05:10+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106794610/hunt-gb/regions/region-05.osm.pbf",
  "osm_snapshot": "",
  "run_id": "hunt-england-260905",
  "elevation_provider": "Environment Agency",
  "elevation_dataset": "EA LIDAR Composite DTM 1m (2022)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Environment Agency",
  "elevation_coverage_id": "13787b9a-26a4-4775-8523-806d13af58fc__Lidar_Composite_Elevation_DTM_1m",
  "elevation_tile_ids": [
   "SX7565.tif"
  ],
  "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": 21.6,
   "max25_pct": 18.52,
   "move_pp": -3.08,
   "reasons": "hump+short-step;short-step"
  },
  "remeasured": {
   "on": "2026-09-20",
   "why": "texture replay (texture-replay)",
   "published_max25_pct": 21.6,
   "max25_pct": 18.52
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Forder Green",
  "county": "Devon"
 }
}