{
 "ocl_version": "0.1.0",
 "name": "Lane near Warcombe",
 "slug": "discovered-lane-50-3163-3-7808",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 45.8889220568933,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 62.0,
   "end_distance_m": 64.0,
   "start_elevation_m": 26.061603153422535,
   "end_elevation_m": 26.9793815945604,
   "min_gradient_pct": -41.61294810603238,
   "suppressed_max_gradient_pct": 70.23111980584301,
   "suppressed_location_m": [
    38.0,
    40.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.82317478518825,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 269.0,
   "end_distance_m": 272.0,
   "start_elevation_m": 57.97543725996572,
   "end_elevation_m": 59.11013250352137,
   "min_gradient_pct": -27.843909547263006,
   "suppressed_max_gradient_pct": 62.1249998301322,
   "suppressed_location_m": [
    38.0,
    41.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 35.453839132802045,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 267.0,
   "end_distance_m": 272.0,
   "start_elevation_m": 57.33744054688127,
   "end_elevation_m": 59.11013250352137,
   "min_gradient_pct": -18.281854443637258,
   "suppressed_max_gradient_pct": 55.6538152387688,
   "suppressed_location_m": [
    36.0,
    41.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 29.488048905624634,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 262.0,
   "end_distance_m": 272.0,
   "start_elevation_m": 56.16132761295891,
   "end_elevation_m": 59.11013250352137,
   "min_gradient_pct": -11.53365668757445,
   "suppressed_max_gradient_pct": 39.68152798051065,
   "suppressed_location_m": [
    33.0,
    43.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.3157867209213,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 88.0,
   "end_distance_m": 108.0,
   "start_elevation_m": 28.950306016814476,
   "end_elevation_m": 33.613463360998736,
   "min_gradient_pct": -10.862095847827717,
   "suppressed_max_gradient_pct": 26.9553674423695,
   "suppressed_location_m": [
    23.0,
    43.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.152848031804865,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 83.0,
   "end_distance_m": 108.0,
   "start_elevation_m": 28.07525135304752,
   "end_elevation_m": 33.613463360998736,
   "min_gradient_pct": -10.661422211107947,
   "suppressed_max_gradient_pct": 24.694844515145505,
   "suppressed_location_m": [
    20.0,
    45.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.953747175627953,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 84.0,
   "end_distance_m": 134.0,
   "start_elevation_m": 28.277590678954205,
   "end_elevation_m": 38.25446426676818,
   "min_gradient_pct": -10.207646849947992,
   "suppressed_max_gradient_pct": 20.457980547587397,
   "suppressed_location_m": [
    14.0,
    64.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.18800841976374,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 178.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 43.550062622710506,
   "end_elevation_m": 59.738071042474246,
   "min_gradient_pct": -8.94919827363907,
   "suppressed_max_gradient_pct": 18.633275942727376,
   "suppressed_location_m": [
    35.0,
    135.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.431,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 121.0,
  "shape_class": "sustained"
 },
 "length_m": 1534.333608116392,
 "start_elevation_m": 15.329225214697932,
 "end_elevation_m": 131.0594399094234,
 "endpoint_gain_m": 115.73021469472546,
 "overall_gradient_pct": 7.542702192178427,
 "accumulated_ascent_m": 136.10832652901257,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 35.453839132802045,
   "start_distance_m": 267.0,
   "end_distance_m": 272.0,
   "midpoint_distance_m": 269.5,
   "start_elevation_m": 57.33744054688127,
   "end_elevation_m": 59.11013250352137,
   "start_xy": [
    272990.90907532815,
    48017.0571092454
   ],
   "end_xy": [
    272993.4199699158,
    48012.733290882075
   ]
  },
  "max_10m": {
   "gradient_pct": 29.488048905624634,
   "start_distance_m": 262.0,
   "end_distance_m": 272.0,
   "midpoint_distance_m": 267.0,
   "start_elevation_m": 56.16132761295891,
   "end_elevation_m": 59.11013250352137,
   "start_xy": [
    272988.3981807404,
    48021.38092760871
   ],
   "end_xy": [
    272993.4199699158,
    48012.733290882075
   ]
  },
  "max_20m": {
   "gradient_pct": 23.3157867209213,
   "start_distance_m": 88.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 98.0,
   "start_elevation_m": 28.950306016814476,
   "end_elevation_m": 33.613463360998736,
   "start_xy": [
    273011.169564261,
    48176.55823560898
   ],
   "end_xy": [
    273019.8804089738,
    48159.889277931885
   ]
  },
  "max_25m": {
   "gradient_pct": 22.152848031804865,
   "start_distance_m": 83.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 95.5,
   "start_elevation_m": 28.07525135304752,
   "end_elevation_m": 33.613463360998736,
   "start_xy": [
    273006.85719887353,
    48177.98136072506
   ],
   "end_xy": [
    273019.8804089738,
    48159.889277931885
   ]
  },
  "max_50m": {
   "gradient_pct": 19.953747175627953,
   "start_distance_m": 84.0,
   "end_distance_m": 134.0,
   "midpoint_distance_m": 109.0,
   "start_elevation_m": 28.277590678954205,
   "end_elevation_m": 38.25446426676818,
   "start_xy": [
    273007.8401573681,
    48178.165187994266
   ],
   "end_xy": [
    273022.8006134428,
    48134.05574178379
   ]
  },
  "max_100m": {
   "gradient_pct": 16.18800841976374,
   "start_distance_m": 178.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 228.0,
   "start_elevation_m": 43.550062622710506,
   "end_elevation_m": 59.738071042474246,
   "start_xy": [
    273031.02978669043,
    48092.33072816318
   ],
   "end_xy": [
    272996.43324110174,
    48007.54482359959
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -18.281854443637258,
   "start_distance_m": 646.0,
   "end_distance_m": 651.0,
   "midpoint_distance_m": 648.5,
   "start_elevation_m": 97.39897142962461,
   "end_elevation_m": 96.48487870744275,
   "start_xy": [
    273288.5389055886,
    47788.66507423183
   ],
   "end_xy": [
    273292.4698377851,
    47785.575127543
   ]
  },
  "min_10m": {
   "gradient_pct": -11.53365668757445,
   "start_distance_m": 848.0,
   "end_distance_m": 858.0,
   "midpoint_distance_m": 853.0,
   "start_elevation_m": 101.81560180240051,
   "end_elevation_m": 100.66223613364306,
   "start_xy": [
    273330.8872711673,
    47610.49429562449
   ],
   "end_xy": [
    273329.5772940773,
    47600.58046893588
   ]
  },
  "min_20m": {
   "gradient_pct": -10.862095847827717,
   "start_distance_m": 850.0,
   "end_distance_m": 870.0,
   "midpoint_distance_m": 860.0,
   "start_elevation_m": 101.5776525360998,
   "end_elevation_m": 99.40523336653426,
   "start_xy": [
    273330.62530173344,
    47608.51152685367
   ],
   "end_xy": [
    273328.1274205452,
    47588.679967662
   ]
  },
  "min_25m": {
   "gradient_pct": -10.661422211107947,
   "start_distance_m": 829.0,
   "end_distance_m": 854.0,
   "midpoint_distance_m": 841.5,
   "start_elevation_m": 103.75569871835852,
   "end_elevation_m": 101.09034316558153,
   "start_xy": [
    273335.99153055623,
    47628.78792704535
   ],
   "end_xy": [
    273330.10131296725,
    47604.54599590475
   ]
  },
  "min_50m": {
   "gradient_pct": -10.207646849947992,
   "start_distance_m": 825.0,
   "end_distance_m": 875.0,
   "midpoint_distance_m": 850.0,
   "start_elevation_m": 104.16813124648691,
   "end_elevation_m": 99.06430782151291,
   "start_xy": [
    273337.65001838,
    47632.4190667124
   ],
   "end_xy": [
    273329.3033730156,
    47583.82610301556
   ]
  },
  "min_100m": {
   "gradient_pct": -8.94919827363907,
   "start_distance_m": 808.0,
   "end_distance_m": 908.0,
   "midpoint_distance_m": 858.0,
   "start_elevation_m": 105.53248687681331,
   "end_elevation_m": 96.58328860317424,
   "start_xy": [
    273345.34706969204,
    47647.57289436964
   ],
   "end_xy": [
    273337.5039627009,
    47551.86127768199
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 45.8889220568933,
   "start_distance_m": 62.0,
   "end_distance_m": 64.0,
   "midpoint_distance_m": 63.0,
   "start_elevation_m": 26.061603153422535,
   "end_elevation_m": 26.9793815945604,
   "start_xy": [
    272986.20679955353,
    48174.16562758864
   ],
   "end_xy": [
    272988.17412730434,
    48174.52565743372
   ]
  },
  "max_3m": {
   "gradient_pct": 37.82317478518825,
   "start_distance_m": 269.0,
   "end_distance_m": 272.0,
   "midpoint_distance_m": 270.5,
   "start_elevation_m": 57.97543725996572,
   "end_elevation_m": 59.11013250352137,
   "start_xy": [
    272991.91339445714,
    48015.32755935172
   ],
   "end_xy": [
    272993.4199699158,
    48012.733290882075
   ]
  }
 },
 "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": 0.06,
   "obstruction_max_height_m": 8.42,
   "flagged_windows_m": [
    10
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.014,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    36.0,
    41.0
   ],
   [
    52.0,
    61.0
   ],
   [
    168.0,
    173.0
   ]
  ],
  "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/SX7045.tif"
  ],
  "calculated_at": "2026-08-19T18:08:32+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": [
   "SX7045.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 9.9% over 200 m (Terrain 50), gain 29.6 m over 331 m way. EXTENDED by graph walk: +1 segment(s) at base, +2 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-50-3192-3-7848, discovered-lane-50-3199-3-7818 ADOPTED (England launch slice 2026-08-16): clean-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (50.3163, -3.7808)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.3163, -3.7808)'"
 },
 "area": {
  "place": "Loddiswell",
  "county": "Devon"
 }
}