{
 "ocl_version": "0.1.0",
 "name": "Kingscott to High Bullen",
 "slug": "discovered-lane-50-9544-4-0884",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.46909541806292,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 108.0,
   "end_distance_m": 110.0,
   "start_elevation_m": 57.915006712627765,
   "end_elevation_m": 58.80438862098902,
   "min_gradient_pct": -35.80309716654213,
   "suppressed_max_gradient_pct": 50.99874631518482,
   "suppressed_location_m": [
    112.0,
    114.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.634584911008496,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 107.0,
   "end_distance_m": 110.0,
   "start_elevation_m": 57.70535107365877,
   "end_elevation_m": 58.80438862098902,
   "min_gradient_pct": -23.328344978519528
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.140339090762865,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 105.0,
   "end_distance_m": 110.0,
   "start_elevation_m": 57.39737166645088,
   "end_elevation_m": 58.80438862098902,
   "min_gradient_pct": -21.972131229217382,
   "suppressed_max_gradient_pct": 34.3045499488214,
   "suppressed_location_m": [
    109.0,
    114.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.915899012231705,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 222.0,
   "end_distance_m": 232.0,
   "start_elevation_m": 78.37572471217345,
   "end_elevation_m": 80.76731461339662,
   "min_gradient_pct": -15.059527194432007,
   "suppressed_max_gradient_pct": 27.812713580325266,
   "suppressed_location_m": [
    104.0,
    114.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.330257105610855,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 212.0,
   "end_distance_m": 232.0,
   "start_elevation_m": 76.50126319227445,
   "end_elevation_m": 80.76731461339662,
   "min_gradient_pct": -14.168029778177242,
   "suppressed_max_gradient_pct": 22.566173283319024,
   "suppressed_location_m": [
    94.0,
    114.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.621346806598012,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 142.0,
   "end_distance_m": 167.0,
   "start_elevation_m": 63.59725698921169,
   "end_elevation_m": 68.75259369086119,
   "min_gradient_pct": -13.23859997019207,
   "suppressed_max_gradient_pct": 21.215976791141912,
   "suppressed_location_m": [
    95.0,
    120.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.995153733175144,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 143.0,
   "end_distance_m": 193.0,
   "start_elevation_m": 63.80540823820942,
   "end_elevation_m": 73.30298510479699,
   "min_gradient_pct": -11.662907239433961
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.667449032805592,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 132.0,
   "end_distance_m": 232.0,
   "start_elevation_m": 62.09986558059103,
   "end_elevation_m": 80.76731461339662,
   "min_gradient_pct": -9.994547469997315
  }
 ],
 "shape": {
  "ascent_concentration": 0.54,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 119.0,
  "shape_class": "stepped"
 },
 "length_m": 3136.9531124613945,
 "start_elevation_m": 43.993882027164744,
 "end_elevation_m": 173.02890119963257,
 "endpoint_gain_m": 129.03501917246783,
 "overall_gradient_pct": 4.1133869250350745,
 "accumulated_ascent_m": 167.77810293211505,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.140339090762865,
   "start_distance_m": 105.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 107.5,
   "start_elevation_m": 57.39737166645088,
   "end_elevation_m": 58.80438862098902,
   "start_xy": [
    253462.8150832878,
    117467.44232772473
   ],
   "end_xy": [
    253462.03242986999,
    117472.3806932061
   ]
  },
  "max_10m": {
   "gradient_pct": 23.915899012231705,
   "start_distance_m": 222.0,
   "end_distance_m": 232.0,
   "midpoint_distance_m": 227.0,
   "start_elevation_m": 78.37572471217345,
   "end_elevation_m": 80.76731461339662,
   "start_xy": [
    253416.2495597101,
    117573.9239307845
   ],
   "end_xy": [
    253413.59960212378,
    117583.56642656053
   ]
  },
  "max_20m": {
   "gradient_pct": 21.330257105610855,
   "start_distance_m": 212.0,
   "end_distance_m": 232.0,
   "midpoint_distance_m": 222.0,
   "start_elevation_m": 76.50126319227445,
   "end_elevation_m": 80.76731461339662,
   "start_xy": [
    253418.89951729644,
    117564.28143500848
   ],
   "end_xy": [
    253413.59960212378,
    117583.56642656053
   ]
  },
  "max_25m": {
   "gradient_pct": 20.621346806598012,
   "start_distance_m": 142.0,
   "end_distance_m": 167.0,
   "midpoint_distance_m": 154.5,
   "start_elevation_m": 63.59725698921169,
   "end_elevation_m": 68.75259369086119,
   "start_xy": [
    253450.26870730487,
    117501.77797907821
   ],
   "end_xy": [
    253438.84066753584,
    117524.01308436327
   ]
  },
  "max_50m": {
   "gradient_pct": 18.995153733175144,
   "start_distance_m": 143.0,
   "end_distance_m": 193.0,
   "midpoint_distance_m": 168.0,
   "start_elevation_m": 63.80540823820942,
   "end_elevation_m": 73.30298510479699,
   "start_xy": [
    253449.8115857141,
    117502.66738328962
   ],
   "end_xy": [
    253426.95550617605,
    117547.13759385972
   ]
  },
  "max_100m": {
   "gradient_pct": 18.667449032805592,
   "start_distance_m": 132.0,
   "end_distance_m": 232.0,
   "midpoint_distance_m": 182.0,
   "start_elevation_m": 62.09986558059103,
   "end_elevation_m": 80.76731461339662,
   "start_xy": [
    253454.83992321248,
    117492.8839369642
   ],
   "end_xy": [
    253413.59960212378,
    117583.56642656053
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -21.972131229217382,
   "start_distance_m": 1265.0,
   "end_distance_m": 1270.0,
   "midpoint_distance_m": 1267.5,
   "start_elevation_m": 121.4093580007654,
   "end_elevation_m": 120.31075143930452,
   "start_xy": [
    253362.57285902486,
    118581.40784441371
   ],
   "end_xy": [
    253362.41812947844,
    118586.405449717
   ]
  },
  "min_10m": {
   "gradient_pct": -15.059527194432007,
   "start_distance_m": 943.0,
   "end_distance_m": 953.0,
   "midpoint_distance_m": 948.0,
   "start_elevation_m": 124.81405379387195,
   "end_elevation_m": 123.30810107442875,
   "start_xy": [
    253358.74774247708,
    118261.24472097523
   ],
   "end_xy": [
    253357.57233656998,
    118271.17540176526
   ]
  },
  "min_20m": {
   "gradient_pct": -14.168029778177242,
   "start_distance_m": 1263.0,
   "end_distance_m": 1283.0,
   "midpoint_distance_m": 1273.0,
   "start_elevation_m": 121.5544898478729,
   "end_elevation_m": 118.72088389223745,
   "start_xy": [
    253362.63475084346,
    118579.4088022924
   ],
   "end_xy": [
    253362.01583265766,
    118599.39922350555
   ]
  },
  "min_25m": {
   "gradient_pct": -13.23859997019207,
   "start_distance_m": 1265.0,
   "end_distance_m": 1290.0,
   "midpoint_distance_m": 1277.5,
   "start_elevation_m": 121.4093580007654,
   "end_elevation_m": 118.09970800821738,
   "start_xy": [
    253362.57285902486,
    118581.40784441371
   ],
   "end_xy": [
    253361.79921129261,
    118606.39587093015
   ]
  },
  "min_50m": {
   "gradient_pct": -11.662907239433961,
   "start_distance_m": 932.0,
   "end_distance_m": 982.0,
   "midpoint_distance_m": 957.0,
   "start_elevation_m": 126.01330009643745,
   "end_elevation_m": 120.18184647672047,
   "start_xy": [
    253360.0406889749,
    118250.32097210619
   ],
   "end_xy": [
    253354.16365943936,
    118299.97437605636
   ]
  },
  "min_100m": {
   "gradient_pct": -9.994547469997315,
   "start_distance_m": 884.0,
   "end_distance_m": 984.0,
   "midpoint_distance_m": 934.0,
   "start_elevation_m": 129.98675246634633,
   "end_elevation_m": 119.99220499634902,
   "start_xy": [
    253365.68263732898,
    118202.65370431403
   ],
   "end_xy": [
    253353.92857825797,
    118301.96051221437
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.46909541806292,
   "start_distance_m": 108.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 109.0,
   "start_elevation_m": 57.915006712627765,
   "end_elevation_m": 58.80438862098902,
   "start_xy": [
    253462.34549123712,
    117470.40534701354
   ],
   "end_xy": [
    253462.03242986999,
    117472.3806932061
   ]
  },
  "max_3m": {
   "gradient_pct": 36.634584911008496,
   "start_distance_m": 107.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 108.5,
   "start_elevation_m": 57.70535107365877,
   "end_elevation_m": 58.80438862098902,
   "start_xy": [
    253462.5020219207,
    117469.41767391727
   ],
   "end_xy": [
    253462.03242986999,
    117472.3806932061
   ]
  }
 },
 "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": 0.013,
   "obstruction_max_height_m": 11.2,
   "flagged_windows_m": [
    2,
    5,
    10
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.002,
   "windows_resited": [
    2.0,
    5.0,
    10.0,
    20.0,
    25.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    111.0,
    116.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "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/SS5015.tif",
   "data/cache/england/bulk_dtm_1m/SS5020.tif"
  ],
  "calculated_at": "2026-08-20T19:23:06+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12.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": [
   "SS5015.tif",
   "SS5020.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 8.3% over 200 m (Terrain 50), gain 39.1 m over 2311 m way. EXTENDED by graph walk: +1 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 1 overlapping proposal(s): discovered-lane-50-9397-4-0876 ADOPTED (England launch slice 2026-08-16): clean-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (50.9544, -4.0884)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.9544, -4.0884)'",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Kingscott",
  "county": "Devon"
 }
}