{
 "ocl_version": "0.1.0",
 "name": "Lane near Lustleigh",
 "slug": "discovered-lane-50-6151-3-7259",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 35.55044696300271,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 295.0,
   "end_distance_m": 297.0,
   "start_elevation_m": 111.95050916028438,
   "end_elevation_m": 112.66151809954444,
   "min_gradient_pct": -17.410605810677282
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.123858887832114,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 294.0,
   "end_distance_m": 297.0,
   "start_elevation_m": 111.66780233290947,
   "end_elevation_m": 112.66151809954444,
   "min_gradient_pct": -14.366016251689473
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.585544008367776,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 292.0,
   "end_distance_m": 297.0,
   "start_elevation_m": 111.08224089912605,
   "end_elevation_m": 112.66151809954444,
   "min_gradient_pct": -10.263303996981108
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.965910104164465,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 291.0,
   "end_distance_m": 301.0,
   "start_elevation_m": 110.8415424632682,
   "end_elevation_m": 113.43813347368464,
   "min_gradient_pct": -9.622859560555241
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.417983812094548,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 508.0,
   "end_distance_m": 528.0,
   "start_elevation_m": 119.18962241948907,
   "end_elevation_m": 123.47321918190798,
   "min_gradient_pct": -8.71966571614088
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.199981062232208,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 503.0,
   "end_distance_m": 528.0,
   "start_elevation_m": 118.17322391634993,
   "end_elevation_m": 123.47321918190798,
   "min_gradient_pct": -7.885255411872606
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.664804987865807,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 228.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 100.21052692920995,
   "end_elevation_m": 109.54292942314285,
   "min_gradient_pct": -4.568788884280366
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.115734702812105,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 204.0,
   "end_distance_m": 304.0,
   "start_elevation_m": 96.7649101077472,
   "end_elevation_m": 113.8806448105593,
   "min_gradient_pct": -0.24475859802412003
  }
 ],
 "shape": {
  "ascent_concentration": 0.306,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 80.0,
  "shape_class": "sustained"
 },
 "length_m": 1313.0000000000173,
 "start_elevation_m": 82.07492142433208,
 "end_elevation_m": 186.25903206617247,
 "endpoint_gain_m": 104.18411064184039,
 "overall_gradient_pct": 7.934814214915387,
 "accumulated_ascent_m": 112.56301277003378,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.585544008367776,
   "start_distance_m": 292.0,
   "end_distance_m": 297.0,
   "midpoint_distance_m": 294.5,
   "start_elevation_m": 111.08224089912605,
   "end_elevation_m": 112.66151809954444,
   "start_xy": [
    278443.22874853277,
    80897.83618729336
   ],
   "end_xy": [
    278441.5438817662,
    80893.12861644509
   ]
  },
  "max_10m": {
   "gradient_pct": 25.965910104164465,
   "start_distance_m": 291.0,
   "end_distance_m": 301.0,
   "midpoint_distance_m": 296.0,
   "start_elevation_m": 110.8415424632682,
   "end_elevation_m": 113.43813347368464,
   "start_xy": [
    278443.565890588,
    80898.77764107793
   ],
   "end_xy": [
    278440.1958758851,
    80889.36260002317
   ]
  },
  "max_20m": {
   "gradient_pct": 21.417983812094548,
   "start_distance_m": 508.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 518.0,
   "start_elevation_m": 119.18962241948907,
   "end_elevation_m": 123.47321918190798,
   "start_xy": [
    278343.2194815171,
    80710.6276614669
   ],
   "end_xy": [
    278335.94153928,
    80691.99887931238
   ]
  },
  "max_25m": {
   "gradient_pct": 21.199981062232208,
   "start_distance_m": 503.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 515.5,
   "start_elevation_m": 118.17322391634993,
   "end_elevation_m": 123.47321918190798,
   "start_xy": [
    278345.03945592686,
    80715.28466612058
   ],
   "end_xy": [
    278335.94153928,
    80691.99887931238
   ]
  },
  "max_50m": {
   "gradient_pct": 18.664804987865807,
   "start_distance_m": 228.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 253.0,
   "start_elevation_m": 100.21052692920995,
   "end_elevation_m": 109.54292942314285,
   "start_xy": [
    278412.7956328359,
    80949.87026800058
   ],
   "end_xy": [
    278443.36211816245,
    80910.7731063268
   ]
  },
  "max_100m": {
   "gradient_pct": 17.115734702812105,
   "start_distance_m": 204.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 254.0,
   "start_elevation_m": 96.7649101077472,
   "end_elevation_m": 113.8806448105593,
   "start_xy": [
    278400.51551904343,
    80970.48744028214
   ],
   "end_xy": [
    278439.18473090586,
    80886.5381380217
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.263303996981108,
   "start_distance_m": 97.0,
   "end_distance_m": 102.0,
   "midpoint_distance_m": 99.5,
   "start_elevation_m": 88.12278351827324,
   "end_elevation_m": 87.60961831842418,
   "start_xy": [
    278396.9334809141,
    81074.98574993672
   ],
   "end_xy": [
    278396.0324640702,
    81070.06760358391
   ]
  },
  "min_10m": {
   "gradient_pct": -9.622859560555241,
   "start_distance_m": 316.0,
   "end_distance_m": 326.0,
   "midpoint_distance_m": 321.0,
   "start_elevation_m": 113.24384784626116,
   "end_elevation_m": 112.28156189020564,
   "start_xy": [
    278435.1407132789,
    80875.24008875007
   ],
   "end_xy": [
    278431.9667067088,
    80865.75884246282
   ]
  },
  "min_20m": {
   "gradient_pct": -8.71966571614088,
   "start_distance_m": 310.0,
   "end_distance_m": 330.0,
   "midpoint_distance_m": 320.0,
   "start_elevation_m": 113.77331670218766,
   "end_elevation_m": 112.02938355895948,
   "start_xy": [
    278437.16272209235,
    80880.8891133859
   ],
   "end_xy": [
    278430.19061859016,
    80862.17477985761
   ]
  },
  "min_25m": {
   "gradient_pct": -7.885255411872606,
   "start_distance_m": 306.0,
   "end_distance_m": 331.0,
   "midpoint_distance_m": 318.5,
   "start_elevation_m": 113.98539255537081,
   "end_elevation_m": 112.01407870240266,
   "start_xy": [
    278438.51072796807,
    80884.65512980976
   ],
   "end_xy": [
    278429.74612754956,
    80861.27899921825
   ]
  },
  "min_50m": {
   "gradient_pct": -4.568788884280366,
   "start_distance_m": 395.0,
   "end_distance_m": 445.0,
   "midpoint_distance_m": 420.0,
   "start_elevation_m": 114.41069324964172,
   "end_elevation_m": 112.12629880750154,
   "start_xy": [
    278385.8196057477,
    80815.03498529801
   ],
   "end_xy": [
    278366.1456186543,
    80769.30808232748
   ]
  },
  "min_100m": {
   "gradient_pct": -0.24475859802412003,
   "start_distance_m": 361.0,
   "end_distance_m": 461.0,
   "midpoint_distance_m": 411.0,
   "start_elevation_m": 112.895665817404,
   "end_elevation_m": 112.65090721937987,
   "start_xy": [
    278410.3248205766,
    80838.45748682873
   ],
   "end_xy": [
    278360.32356320304,
    80754.4049405001
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 35.55044696300271,
   "start_distance_m": 295.0,
   "end_distance_m": 297.0,
   "midpoint_distance_m": 296.0,
   "start_elevation_m": 111.95050916028438,
   "end_elevation_m": 112.66151809954444,
   "start_xy": [
    278442.2178847068,
    80895.01162465604
   ],
   "end_xy": [
    278441.5438817662,
    80893.12861644509
   ]
  },
  "max_3m": {
   "gradient_pct": 33.123858887832114,
   "start_distance_m": 294.0,
   "end_distance_m": 297.0,
   "midpoint_distance_m": 295.5,
   "start_elevation_m": 111.66780233290947,
   "end_elevation_m": 112.66151809954444,
   "start_xy": [
    278442.55474559497,
    80895.9531790814
   ],
   "end_xy": [
    278441.5438817662,
    80893.12861644509
   ]
  }
 },
 "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": 0.097,
   "obstruction_max_height_m": 34.3,
   "flagged_windows_m": []
  },
  "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/england/bulk_dtm_1m/SX7580.tif"
  ],
  "calculated_at": "2026-08-19T18:15:09+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": [
   "SX7580.tif"
  ],
  "route_summit_trim_m": 359.4,
  "route_summit_trim_loss_m": 14.7,
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.5% over 200 m (Terrain 50), gain 44.8 m over 1144 m way. EXTENDED by graph walk: +2 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 2 overlapping proposal(s): discovered-lane-50-6128-3-7214, rudge-hill ADOPTED (England launch slice 2026-08-16): clean-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (50.6151, -3.7259)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.6151, -3.7259)'"
 },
 "area": {
  "place": "Lustleigh",
  "county": "Devon"
 }
}