{
 "ocl_version": "0.1.0",
 "name": "Lower Crackington to Coxford",
 "slug": "discovered-lane-50-7427-4-6062",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 52.24566748825552,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 471.0,
   "end_distance_m": 473.0,
   "start_elevation_m": 75.88622755496706,
   "end_elevation_m": 76.93114090473217,
   "min_gradient_pct": -47.69375209010249,
   "suppressed_max_gradient_pct": 58.95252896412231,
   "suppressed_location_m": [
    539.0,
    541.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 44.15244240968429,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 47.0,
   "end_distance_m": 50.0,
   "start_elevation_m": 45.85450467118311,
   "end_elevation_m": 47.17907794347364,
   "min_gradient_pct": -39.15689533569141,
   "suppressed_max_gradient_pct": 58.46501657395796,
   "suppressed_location_m": [
    539.0,
    542.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 37.90888851092262,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 471.0,
   "end_distance_m": 476.0,
   "start_elevation_m": 75.88622755496706,
   "end_elevation_m": 77.7816719805132,
   "min_gradient_pct": -31.029340646353774,
   "suppressed_max_gradient_pct": 48.487725307946334,
   "suppressed_location_m": [
    537.0,
    542.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 34.41951279267926,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 567.0,
   "end_distance_m": 577.0,
   "start_elevation_m": 93.05509026820914,
   "end_elevation_m": 96.49704154747707,
   "min_gradient_pct": -25.359257855710524
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 27.42065984766292,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 561.0,
   "end_distance_m": 581.0,
   "start_elevation_m": 91.95076918745633,
   "end_elevation_m": 97.43490115698891,
   "min_gradient_pct": -21.009542736438647,
   "suppressed_max_gradient_pct": 29.486145590668617,
   "suppressed_location_m": [
    567.0,
    587.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.930737122254982,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 470.0,
   "end_distance_m": 495.0,
   "start_elevation_m": 75.86701168445899,
   "end_elevation_m": 81.84969596502273,
   "min_gradient_pct": -19.55663408847755,
   "suppressed_max_gradient_pct": 27.35709780096232,
   "suppressed_location_m": [
    556.0,
    581.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.74690103708633,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 445.0,
   "end_distance_m": 495.0,
   "start_elevation_m": 71.97624544647957,
   "end_elevation_m": 81.84969596502273,
   "min_gradient_pct": -16.95308984699568,
   "suppressed_max_gradient_pct": 24.786624336388627,
   "suppressed_location_m": [
    537.0,
    587.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.55299922420498,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 598.0,
   "end_distance_m": 698.0,
   "start_elevation_m": 99.40869752732344,
   "end_elevation_m": 116.96169675152842,
   "min_gradient_pct": -16.05725567421537,
   "suppressed_max_gradient_pct": 19.996800578859123,
   "suppressed_location_m": [
    526.0,
    626.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.453,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 204.0,
  "shape_class": "stepped"
 },
 "length_m": 1821.1822308345484,
 "start_elevation_m": 44.4040371663061,
 "end_elevation_m": 148.80832790771512,
 "endpoint_gain_m": 104.40429074140903,
 "overall_gradient_pct": 5.732775609916106,
 "accumulated_ascent_m": 147.06701590156894,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 37.90888851092262,
   "start_distance_m": 471.0,
   "end_distance_m": 476.0,
   "midpoint_distance_m": 473.5,
   "start_elevation_m": 75.88622755496706,
   "end_elevation_m": 77.7816719805132,
   "start_xy": [
    216104.62776642453,
    96377.40619408055
   ],
   "end_xy": [
    216104.55034910262,
    96382.40559470045
   ]
  },
  "max_10m": {
   "gradient_pct": 34.41951279267926,
   "start_distance_m": 567.0,
   "end_distance_m": 577.0,
   "midpoint_distance_m": 572.0,
   "start_elevation_m": 93.05509026820914,
   "end_elevation_m": 96.49704154747707,
   "start_xy": [
    216061.96392620617,
    96457.59118930741
   ],
   "end_xy": [
    216055.39299565594,
    96464.73106879691
   ]
  },
  "max_20m": {
   "gradient_pct": 27.42065984766292,
   "start_distance_m": 561.0,
   "end_distance_m": 581.0,
   "midpoint_distance_m": 571.0,
   "start_elevation_m": 91.95076918745633,
   "end_elevation_m": 97.43490115698891,
   "start_xy": [
    216067.1373675034,
    96454.55219191613
   ],
   "end_xy": [
    216053.32799148167,
    96468.15681802304
   ]
  },
  "max_25m": {
   "gradient_pct": 23.930737122254982,
   "start_distance_m": 470.0,
   "end_distance_m": 495.0,
   "midpoint_distance_m": 482.5,
   "start_elevation_m": 75.86701168445899,
   "end_elevation_m": 81.84969596502273,
   "start_xy": [
    216104.6432498889,
    96376.40631395657
   ],
   "end_xy": [
    216102.89716126246,
    96401.2841376937
   ]
  },
  "max_50m": {
   "gradient_pct": 19.74690103708633,
   "start_distance_m": 445.0,
   "end_distance_m": 495.0,
   "midpoint_distance_m": 470.0,
   "start_elevation_m": 71.97624544647957,
   "end_elevation_m": 81.84969596502273,
   "start_xy": [
    216103.90768412343,
    96351.42337589651
   ],
   "end_xy": [
    216102.89716126246,
    96401.2841376937
   ]
  },
  "max_100m": {
   "gradient_pct": 17.55299922420498,
   "start_distance_m": 598.0,
   "end_distance_m": 698.0,
   "midpoint_distance_m": 648.0,
   "start_elevation_m": 99.40869752732344,
   "end_elevation_m": 116.96169675152842,
   "start_xy": [
    216047.56402976703,
    96484.08469758091
   ],
   "end_xy": [
    215992.69428764153,
    96550.84917900815
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -31.029340646353774,
   "start_distance_m": 226.0,
   "end_distance_m": 231.0,
   "midpoint_distance_m": 228.5,
   "start_elevation_m": 56.929298587412305,
   "end_elevation_m": 55.377831555094616,
   "start_xy": [
    216006.1168993397,
    96160.82537945188
   ],
   "end_xy": [
    216010.54413549742,
    96162.99666533626
   ]
  },
  "min_10m": {
   "gradient_pct": -25.359257855710524,
   "start_distance_m": 1081.0,
   "end_distance_m": 1091.0,
   "midpoint_distance_m": 1086.0,
   "start_elevation_m": 103.55561143914066,
   "end_elevation_m": 101.01968565356961,
   "start_xy": [
    216163.85760508344,
    96868.14355568122
   ],
   "end_xy": [
    216168.90272963466,
    96876.72623942354
   ]
  },
  "min_20m": {
   "gradient_pct": -21.009542736438647,
   "start_distance_m": 1076.0,
   "end_distance_m": 1096.0,
   "midpoint_distance_m": 1086.0,
   "start_elevation_m": 104.52823495313075,
   "end_elevation_m": 100.32632640584302,
   "start_xy": [
    216161.75969623288,
    96863.60496796534
   ],
   "end_xy": [
    216171.814074307,
    96880.79122062877
   ]
  },
  "min_25m": {
   "gradient_pct": -19.55663408847755,
   "start_distance_m": 1069.0,
   "end_distance_m": 1094.0,
   "midpoint_distance_m": 1081.5,
   "start_elevation_m": 105.44638189452387,
   "end_elevation_m": 100.55722337240448,
   "start_xy": [
    216158.82262384216,
    96857.25094516308
   ],
   "end_xy": [
    216170.64953643808,
    96879.16522814668
   ]
  },
  "min_50m": {
   "gradient_pct": -16.95308984699568,
   "start_distance_m": 1042.0,
   "end_distance_m": 1092.0,
   "midpoint_distance_m": 1067.0,
   "start_elevation_m": 109.29055353818015,
   "end_elevation_m": 100.81400861468231,
   "start_xy": [
    216143.3826138993,
    96836.83228606025
   ],
   "end_xy": [
    216169.48499856913,
    96877.53923566459
   ]
  },
  "min_100m": {
   "gradient_pct": -16.05725567421537,
   "start_distance_m": 998.0,
   "end_distance_m": 1098.0,
   "midpoint_distance_m": 1048.0,
   "start_elevation_m": 116.15579357960513,
   "end_elevation_m": 100.09853790538976,
   "start_xy": [
    216112.66892508775,
    96805.62659932455
   ],
   "end_xy": [
    216172.97861217594,
    96882.41721311086
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 52.24566748825552,
   "start_distance_m": 471.0,
   "end_distance_m": 473.0,
   "midpoint_distance_m": 472.0,
   "start_elevation_m": 75.88622755496706,
   "end_elevation_m": 76.93114090473217,
   "start_xy": [
    216104.62776642453,
    96377.40619408055
   ],
   "end_xy": [
    216104.59679949578,
    96379.40595432851
   ]
  },
  "max_3m": {
   "gradient_pct": 44.15244240968429,
   "start_distance_m": 47.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 48.5,
   "start_elevation_m": 45.85450467118311,
   "end_elevation_m": 47.17907794347364,
   "start_xy": [
    215832.0636521756,
    96142.82761850399
   ],
   "end_xy": [
    215835.045140223,
    96142.49485879607
   ]
  }
 },
 "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": 0.055,
   "obstruction_max_height_m": 6.86,
   "flagged_windows_m": [
    10,
    20,
    50,
    100
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.01,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    537.0,
    542.0
   ],
   [
    555.0,
    560.0
   ],
   [
    583.0,
    588.0
   ]
  ],
  "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/england/bulk_dtm_1m/SX1595.tif"
  ],
  "calculated_at": "2026-08-15T00:57:55+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12-roads.osm.pbf",
  "osm_snapshot": "2026-08-12T20:21:46Z",
  "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": [
   "SX1595.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 12.2% over 200 m (Terrain 50), gain 26.2 m over 933 m way. EXTENDED by graph walk: +3 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.7427, -4.6062)'"
 },
 "area": {
  "place": "Middle Crackington",
  "county": "Cornwall"
 }
}