{
 "ocl_version": "0.1.0",
 "name": "Bag Tor to Haytor Vale",
 "slug": "discovered-lane-50-5653-3-7371",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 41.165917945700414,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 114.0,
   "end_distance_m": 116.0,
   "start_elevation_m": 217.8088016250102,
   "end_elevation_m": 218.6321199839242,
   "min_gradient_pct": -36.66049735446535,
   "suppressed_max_gradient_pct": 77.53836436342567,
   "suppressed_location_m": [
    136.0,
    138.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.01803152617348,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 113.0,
   "end_distance_m": 116.0,
   "start_elevation_m": 217.491579038139,
   "end_elevation_m": 218.6321199839242,
   "min_gradient_pct": -33.764606845676326,
   "suppressed_max_gradient_pct": 78.54667153438395,
   "suppressed_location_m": [
    136.0,
    139.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 38.2599417868073,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 111.0,
   "end_distance_m": 116.0,
   "start_elevation_m": 216.71912289458385,
   "end_elevation_m": 218.6321199839242,
   "min_gradient_pct": -31.66292100424414,
   "suppressed_max_gradient_pct": 64.62496300995042,
   "suppressed_location_m": [
    135.0,
    140.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 33.53793180583807,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 107.0,
   "end_distance_m": 117.0,
   "start_elevation_m": 215.59069105451886,
   "end_elevation_m": 218.94448423510266,
   "min_gradient_pct": -21.62011545532664,
   "suppressed_max_gradient_pct": 44.978228870893986,
   "suppressed_location_m": [
    131.0,
    141.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.977185193159755,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 38.0,
   "end_distance_m": 58.0,
   "start_elevation_m": 202.29702886317577,
   "end_elevation_m": 207.49246590180772,
   "min_gradient_pct": -16.58511749500647,
   "suppressed_max_gradient_pct": 27.876463712262165,
   "suppressed_location_m": [
    130.0,
    150.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.744505475348433,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 33.0,
   "end_distance_m": 58.0,
   "start_elevation_m": 201.3063395329706,
   "end_elevation_m": 207.49246590180772,
   "min_gradient_pct": -15.058099594625219
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.74169590855541,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 31.0,
   "end_distance_m": 81.0,
   "start_elevation_m": 200.93640636527275,
   "end_elevation_m": 211.30725431955045,
   "min_gradient_pct": -6.593262979581652,
   "suppressed_max_gradient_pct": 22.07162198086189,
   "suppressed_location_m": [
    91.0,
    141.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.768783284204886,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 25.0,
   "end_distance_m": 125.0,
   "start_elevation_m": 200.74658832273118,
   "end_elevation_m": 219.51537160693607,
   "min_gradient_pct": -0.6714081926568838,
   "suppressed_max_gradient_pct": 20.963448004598323,
   "suppressed_location_m": [
    40.0,
    140.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.451,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 99.0,
  "shape_class": "stepped"
 },
 "length_m": 742.8418208305806,
 "start_elevation_m": 200.84577109756424,
 "end_elevation_m": 250.4938342921152,
 "endpoint_gain_m": 49.64806319455096,
 "overall_gradient_pct": 6.683530975549929,
 "accumulated_ascent_m": 58.59715927079654,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 38.2599417868073,
   "start_distance_m": 111.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 113.5,
   "start_elevation_m": 216.71912289458385,
   "end_elevation_m": 218.6321199839242,
   "start_xy": [
    276968.8980912524,
    75445.97910659142
   ],
   "end_xy": [
    276972.2171061904,
    75442.23956920805
   ]
  },
  "max_10m": {
   "gradient_pct": 33.53793180583807,
   "start_distance_m": 107.0,
   "end_distance_m": 117.0,
   "midpoint_distance_m": 112.0,
   "start_elevation_m": 215.59069105451886,
   "end_elevation_m": 218.94448423510266,
   "start_xy": [
    276966.24287930207,
    75448.97073649813
   ],
   "end_xy": [
    276972.880909178,
    75441.49166173137
   ]
  },
  "max_20m": {
   "gradient_pct": 25.977185193159755,
   "start_distance_m": 38.0,
   "end_distance_m": 58.0,
   "midpoint_distance_m": 48.0,
   "start_elevation_m": 202.29702886317577,
   "end_elevation_m": 207.49246590180772,
   "start_xy": [
    276937.4850864696,
    75510.51718273955
   ],
   "end_xy": [
    276947.73359197594,
    75493.41372287391
   ]
  },
  "max_25m": {
   "gradient_pct": 24.744505475348433,
   "start_distance_m": 33.0,
   "end_distance_m": 58.0,
   "midpoint_distance_m": 45.5,
   "start_elevation_m": 201.3063395329706,
   "end_elevation_m": 207.49246590180772,
   "start_xy": [
    276934.8117335028,
    75514.74248555882
   ],
   "end_xy": [
    276947.73359197594,
    75493.41372287391
   ]
  },
  "max_50m": {
   "gradient_pct": 20.74169590855541,
   "start_distance_m": 31.0,
   "end_distance_m": 81.0,
   "midpoint_distance_m": 56.0,
   "start_elevation_m": 200.93640636527275,
   "end_elevation_m": 211.30725431955045,
   "start_xy": [
    276933.742392316,
    75516.43260668653
   ],
   "end_xy": [
    276954.29298568325,
    75471.36889685526
   ]
  },
  "max_100m": {
   "gradient_pct": 18.768783284204886,
   "start_distance_m": 25.0,
   "end_distance_m": 125.0,
   "midpoint_distance_m": 75.0,
   "start_elevation_m": 200.74658832273118,
   "end_elevation_m": 219.51537160693607,
   "start_xy": [
    276930.5346601498,
    75521.50315441459
   ],
   "end_xy": [
    276978.1913330787,
    75435.50840191796
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -31.66292100424414,
   "start_distance_m": 187.0,
   "end_distance_m": 192.0,
   "midpoint_distance_m": 189.5,
   "start_elevation_m": 222.7692336162878,
   "end_elevation_m": 221.1860875660756,
   "start_xy": [
    277029.09828980465,
    75400.99075694777
   ],
   "end_xy": [
    277033.4073676605,
    75398.45464811087
   ]
  },
  "min_10m": {
   "gradient_pct": -21.62011545532664,
   "start_distance_m": 182.0,
   "end_distance_m": 192.0,
   "midpoint_distance_m": 187.0,
   "start_elevation_m": 223.34809911160826,
   "end_elevation_m": 221.1860875660756,
   "start_xy": [
    277024.78921194887,
    75403.52686578465
   ],
   "end_xy": [
    277033.4073676605,
    75398.45464811087
   ]
  },
  "min_20m": {
   "gradient_pct": -16.58511749500647,
   "start_distance_m": 172.0,
   "end_distance_m": 192.0,
   "midpoint_distance_m": 182.0,
   "start_elevation_m": 224.5031110650769,
   "end_elevation_m": 221.1860875660756,
   "start_xy": [
    277016.1710562372,
    75408.59908345841
   ],
   "end_xy": [
    277033.4073676605,
    75398.45464811087
   ]
  },
  "min_25m": {
   "gradient_pct": -15.058099594625219,
   "start_distance_m": 167.0,
   "end_distance_m": 192.0,
   "midpoint_distance_m": 179.5,
   "start_elevation_m": 224.9506124647319,
   "end_elevation_m": 221.1860875660756,
   "start_xy": [
    277011.8619783814,
    75411.1351922953
   ],
   "end_xy": [
    277033.4073676605,
    75398.45464811087
   ]
  },
  "min_50m": {
   "gradient_pct": -6.593262979581652,
   "start_distance_m": 150.0,
   "end_distance_m": 200.0,
   "midpoint_distance_m": 175.0,
   "start_elevation_m": 224.8834825206856,
   "end_elevation_m": 221.58685103089476,
   "start_xy": [
    276997.21111367166,
    75419.75796234071
   ],
   "end_xy": [
    277040.7195053525,
    75395.73485257234
   ]
  },
  "min_100m": {
   "gradient_pct": -0.6714081926568838,
   "start_distance_m": 405.0,
   "end_distance_m": 505.0,
   "midpoint_distance_m": 455.0,
   "start_elevation_m": 237.93490476917577,
   "end_elevation_m": 237.2634965765189,
   "start_xy": [
    277213.76697599294,
    75474.73789637159
   ],
   "end_xy": [
    277276.5064601787,
    75552.40850813624
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 41.165917945700414,
   "start_distance_m": 114.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 115.0,
   "start_elevation_m": 217.8088016250102,
   "end_elevation_m": 218.6321199839242,
   "start_xy": [
    276970.8895002152,
    75443.7353841614
   ],
   "end_xy": [
    276972.2171061904,
    75442.23956920805
   ]
  },
  "max_3m": {
   "gradient_pct": 38.01803152617348,
   "start_distance_m": 113.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 114.5,
   "start_elevation_m": 217.491579038139,
   "end_elevation_m": 218.6321199839242,
   "start_xy": [
    276970.22569722764,
    75444.48329163807
   ],
   "end_xy": [
    276972.2171061904,
    75442.23956920805
   ]
  }
 },
 "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": 0.046,
   "obstruction_max_height_m": 8.65,
   "flagged_windows_m": []
  },
  "structure_suppression": {
   "masked_fraction": 0.011,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    134.0,
    141.0
   ]
  ],
  "review": [],
  "extent": [
   "descends_at_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/SX7575.tif"
  ],
  "calculated_at": "2026-08-15T02:23:53+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": [
   "SX7575.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 10.7% over 200 m (Terrain 50), gain 35.3 m over 507 m way. EXTENDED by graph walk: +0 segment(s) at base, +1 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 (50.5653, -3.7371)'"
 },
 "area": {
  "place": "Haytor Vale",
  "county": "Devon"
 }
}