{
 "ocl_version": "0.1.0",
 "name": "Lane near Cotleigh",
 "slug": "discovered-lane-50-8166-3-1203",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 39.52375149409875,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 0.0,
   "end_distance_m": 2.0,
   "start_elevation_m": 107.48880628111075,
   "end_elevation_m": 108.27928131099273,
   "min_gradient_pct": -51.46971050100433,
   "suppressed_max_gradient_pct": 54.231477767010716,
   "suppressed_location_m": [
    203.0,
    205.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.20832380118107,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 250.0,
   "end_distance_m": 253.0,
   "start_elevation_m": 128.17757445152785,
   "end_elevation_m": 129.26382416556328,
   "min_gradient_pct": -45.41738561252989,
   "suppressed_max_gradient_pct": 50.06547257119772,
   "suppressed_location_m": [
    203.0,
    206.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.33184424333899,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 236.0,
   "end_distance_m": 241.0,
   "start_elevation_m": 124.55230958332636,
   "end_elevation_m": 126.16890179549331,
   "min_gradient_pct": -34.22484002602857,
   "suppressed_max_gradient_pct": 35.94696637486777,
   "suppressed_location_m": [
    202.0,
    207.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 30.373837970577,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 235.0,
   "end_distance_m": 245.0,
   "start_elevation_m": 124.27163405157337,
   "end_elevation_m": 127.30901784863107,
   "min_gradient_pct": -20.410837806163613
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 27.804939177471084,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 234.0,
   "end_distance_m": 254.0,
   "start_elevation_m": 124.02008200389852,
   "end_elevation_m": 129.58106983939274,
   "min_gradient_pct": -15.836639288170318
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 26.336252915209744,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 233.0,
   "end_distance_m": 258.0,
   "start_elevation_m": 123.8252977031021,
   "end_elevation_m": 130.40936093190453,
   "min_gradient_pct": -15.050112258457148
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 23.76864851318757,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 233.0,
   "end_distance_m": 283.0,
   "start_elevation_m": 123.8252977031021,
   "end_elevation_m": 135.70962195969588,
   "min_gradient_pct": -4.251956715895744,
   "suppressed_max_gradient_pct": 23.787041120887405,
   "suppressed_location_m": [
    217.0,
    267.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.289082584742317,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 230.0,
   "end_distance_m": 330.0,
   "start_elevation_m": 123.30330680336507,
   "end_elevation_m": 140.5923893881074,
   "min_gradient_pct": -1.4667116347606282,
   "suppressed_max_gradient_pct": 20.417639555201788,
   "suppressed_location_m": [
    202.0,
    302.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.485,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 95.0,
  "shape_class": "stepped"
 },
 "length_m": 1400.6617349064543,
 "start_elevation_m": 107.48880628111075,
 "end_elevation_m": 172.56458385681137,
 "endpoint_gain_m": 65.07577757570061,
 "overall_gradient_pct": 4.646073777409705,
 "accumulated_ascent_m": 80.73325036196069,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.33184424333899,
   "start_distance_m": 236.0,
   "end_distance_m": 241.0,
   "midpoint_distance_m": 238.5,
   "start_elevation_m": 124.55230958332636,
   "end_elevation_m": 126.16890179549331,
   "start_xy": [
    321040.7050471887,
    102229.30346958512
   ],
   "end_xy": [
    321045.1351864909,
    102231.62162958019
   ]
  },
  "max_10m": {
   "gradient_pct": 30.373837970577,
   "start_distance_m": 235.0,
   "end_distance_m": 245.0,
   "midpoint_distance_m": 240.0,
   "start_elevation_m": 124.27163405157337,
   "end_elevation_m": 127.30901784863107,
   "start_xy": [
    321039.8190193282,
    102228.83983758611
   ],
   "end_xy": [
    321048.6792979327,
    102233.47615757622
   ]
  },
  "max_20m": {
   "gradient_pct": 27.804939177471084,
   "start_distance_m": 234.0,
   "end_distance_m": 254.0,
   "midpoint_distance_m": 244.0,
   "start_elevation_m": 124.02008200389852,
   "end_elevation_m": 129.58106983939274,
   "start_xy": [
    321038.93299146777,
    102228.3762055871
   ],
   "end_xy": [
    321056.65354867675,
    102237.64884556734
   ]
  },
  "max_25m": {
   "gradient_pct": 26.336252915209744,
   "start_distance_m": 233.0,
   "end_distance_m": 258.0,
   "midpoint_distance_m": 245.5,
   "start_elevation_m": 123.8252977031021,
   "end_elevation_m": 130.40936093190453,
   "start_xy": [
    321038.3085622272,
    102227.60173852395
   ],
   "end_xy": [
    321060.1976601185,
    102239.50337356338
   ]
  },
  "max_50m": {
   "gradient_pct": 23.76864851318757,
   "start_distance_m": 233.0,
   "end_distance_m": 283.0,
   "midpoint_distance_m": 258.0,
   "start_elevation_m": 123.8252977031021,
   "end_elevation_m": 135.70962195969588,
   "start_xy": [
    321038.3085622272,
    102227.60173852395
   ],
   "end_xy": [
    321081.3607302303,
    102252.13435188128
   ]
  },
  "max_100m": {
   "gradient_pct": 17.289082584742317,
   "start_distance_m": 230.0,
   "end_distance_m": 330.0,
   "midpoint_distance_m": 280.0,
   "start_elevation_m": 123.30330680336507,
   "end_elevation_m": 140.5923893881074,
   "start_xy": [
    321036.48419645766,
    102225.22020760055
   ],
   "end_xy": [
    321081.45030769706,
    102297.49087189672
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -34.22484002602857,
   "start_distance_m": 197.0,
   "end_distance_m": 202.0,
   "midpoint_distance_m": 199.5,
   "start_elevation_m": 119.44330254490538,
   "end_elevation_m": 117.73206054360395,
   "start_xy": [
    321024.33309665596,
    102196.14629861401
   ],
   "end_xy": [
    321024.550252993,
    102201.14158070067
   ]
  },
  "min_10m": {
   "gradient_pct": -20.410837806163613,
   "start_distance_m": 192.0,
   "end_distance_m": 202.0,
   "midpoint_distance_m": 197.0,
   "start_elevation_m": 119.77314432422031,
   "end_elevation_m": 117.73206054360395,
   "start_xy": [
    321024.1159403189,
    102191.15101652735
   ],
   "end_xy": [
    321024.550252993,
    102201.14158070067
   ]
  },
  "min_20m": {
   "gradient_pct": -15.836639288170318,
   "start_distance_m": 182.0,
   "end_distance_m": 202.0,
   "midpoint_distance_m": 192.0,
   "start_elevation_m": 120.89938840123801,
   "end_elevation_m": 117.73206054360395,
   "start_xy": [
    321023.68162764487,
    102181.16045235404
   ],
   "end_xy": [
    321024.550252993,
    102201.14158070067
   ]
  },
  "min_25m": {
   "gradient_pct": -15.050112258457148,
   "start_distance_m": 177.0,
   "end_distance_m": 202.0,
   "midpoint_distance_m": 189.5,
   "start_elevation_m": 121.49458860821824,
   "end_elevation_m": 117.73206054360395,
   "start_xy": [
    321023.4644713078,
    102176.16517026738
   ],
   "end_xy": [
    321024.550252993,
    102201.14158070067
   ]
  },
  "min_50m": {
   "gradient_pct": -4.251956715895744,
   "start_distance_m": 776.0,
   "end_distance_m": 826.0,
   "midpoint_distance_m": 801.0,
   "start_elevation_m": 148.11033088338428,
   "end_elevation_m": 145.9843525254364,
   "start_xy": [
    321180.64719927293,
    102701.70249585209
   ],
   "end_xy": [
    321174.3797033805,
    102751.08991522425
   ]
  },
  "min_100m": {
   "gradient_pct": -1.4667116347606282,
   "start_distance_m": 727.0,
   "end_distance_m": 827.0,
   "midpoint_distance_m": 777.0,
   "start_elevation_m": 147.44480653385267,
   "end_elevation_m": 145.97809489909204,
   "start_xy": [
    321200.70597493614,
    102657.88150413576
   ],
   "end_xy": [
    321174.19803549454,
    102752.07327516812
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 39.52375149409875,
   "start_distance_m": 0.0,
   "end_distance_m": 2.0,
   "midpoint_distance_m": 1.0,
   "start_elevation_m": 107.48880628111075,
   "end_elevation_m": 108.27928131099273,
   "start_xy": [
    321191.204,
    102174.785
   ],
   "end_xy": [
    321189.83213466173,
    102173.3296699709
   ]
  },
  "max_3m": {
   "gradient_pct": 36.20832380118107,
   "start_distance_m": 250.0,
   "end_distance_m": 253.0,
   "midpoint_distance_m": 251.5,
   "start_elevation_m": 128.17757445152785,
   "end_elevation_m": 129.26382416556328,
   "start_xy": [
    321053.10943723493,
    102235.79431757129
   ],
   "end_xy": [
    321055.7675208163,
    102237.18521356833
   ]
  }
 },
 "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": 0.069,
   "obstruction_max_height_m": 12.01,
   "flagged_windows_m": []
  },
  "structure_suppression": {
   "masked_fraction": 0.039,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    175.0,
    229.0
   ]
  ],
  "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/ST2000.tif"
  ],
  "calculated_at": "2026-08-23T14:19:47+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",
  "run_id": "mask-rebatch-1-260823",
  "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": [
   "ST2000.tif"
  ],
  "climb_origin": "discovered",
  "mask_ranges_m": [
   [
    180.0,
    224.0
   ]
  ],
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.8166, -3.1203)'",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Cotleigh",
  "county": "Devon"
 }
}