{
 "ocl_version": "0.1.0",
 "name": "Lane near Loxbeare",
 "slug": "discovered-lane-50-9339-3-5504",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 46.84830292628277,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 754.0,
   "end_distance_m": 756.0,
   "start_elevation_m": 184.99923291400677,
   "end_elevation_m": 185.93619897253242,
   "min_gradient_pct": -20.391594727878726
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 42.32025878430553,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 754.0,
   "end_distance_m": 757.0,
   "start_elevation_m": 184.99923291400677,
   "end_elevation_m": 186.26884067753593,
   "min_gradient_pct": -18.635324880097908
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 35.67303660873279,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 754.0,
   "end_distance_m": 759.0,
   "start_elevation_m": 184.99923291400677,
   "end_elevation_m": 186.7828847444434,
   "min_gradient_pct": -14.990450573042722
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.122451899648183,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 753.0,
   "end_distance_m": 763.0,
   "start_elevation_m": 184.84025413788208,
   "end_elevation_m": 187.5524993278469,
   "min_gradient_pct": -11.672648652701696
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.114657704126245,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 742.0,
   "end_distance_m": 762.0,
   "start_elevation_m": 182.76436770325043,
   "end_elevation_m": 187.38729924407568,
   "min_gradient_pct": -9.583969083425501
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.819451807174346,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 738.0,
   "end_distance_m": 763.0,
   "start_elevation_m": 182.09763637605332,
   "end_elevation_m": 187.5524993278469,
   "min_gradient_pct": -10.101038144795325
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.810062923912994,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 714.0,
   "end_distance_m": 764.0,
   "start_elevation_m": 178.80015495689042,
   "end_elevation_m": 187.70518641884692,
   "min_gradient_pct": -8.482542581398718
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.475762265667045,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 103.0,
   "end_distance_m": 203.0,
   "start_elevation_m": 179.48447722870168,
   "end_elevation_m": 191.96023949436872,
   "min_gradient_pct": -7.170425622144364
  }
 ],
 "shape": {
  "ascent_concentration": 0.391,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 85.0,
  "shape_class": "sustained"
 },
 "length_m": 2560.0000000000105,
 "start_elevation_m": 171.8394450263968,
 "end_elevation_m": 267.86041478062987,
 "endpoint_gain_m": 96.02096975423308,
 "overall_gradient_pct": 3.7508191310247145,
 "accumulated_ascent_m": 127.44285774773664,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 35.67303660873279,
   "start_distance_m": 754.0,
   "end_distance_m": 759.0,
   "midpoint_distance_m": 756.5,
   "start_elevation_m": 184.99923291400677,
   "end_elevation_m": 186.7828847444434,
   "start_xy": [
    291126.7066493478,
    116086.88490501352
   ],
   "end_xy": [
    291131.69118283567,
    116087.27786804816
   ]
  },
  "max_10m": {
   "gradient_pct": 27.122451899648183,
   "start_distance_m": 753.0,
   "end_distance_m": 763.0,
   "midpoint_distance_m": 758.0,
   "start_elevation_m": 184.84025413788208,
   "end_elevation_m": 187.5524993278469,
   "start_xy": [
    291125.7097309404,
    116086.80646085678
   ],
   "end_xy": [
    291135.6799045612,
    116087.54743456599
   ]
  },
  "max_20m": {
   "gradient_pct": 23.114657704126245,
   "start_distance_m": 742.0,
   "end_distance_m": 762.0,
   "midpoint_distance_m": 752.0,
   "start_elevation_m": 182.76436770325043,
   "end_elevation_m": 187.38729924407568,
   "start_xy": [
    291118.3445381508,
    116079.40561679237
   ],
   "end_xy": [
    291134.6819188227,
    116087.51344400017
   ]
  },
  "max_25m": {
   "gradient_pct": 21.819451807174346,
   "start_distance_m": 738.0,
   "end_distance_m": 763.0,
   "midpoint_distance_m": 750.5,
   "start_elevation_m": 182.09763637605332,
   "end_elevation_m": 187.5524993278469,
   "start_xy": [
    291116.0067150582,
    116076.15993274152
   ],
   "end_xy": [
    291135.6799045612,
    116087.54743456599
   ]
  },
  "max_50m": {
   "gradient_pct": 17.810062923912994,
   "start_distance_m": 714.0,
   "end_distance_m": 764.0,
   "midpoint_distance_m": 739.0,
   "start_elevation_m": 178.80015495689042,
   "end_elevation_m": 187.70518641884692,
   "start_xy": [
    291108.7808276726,
    116053.30554314211
   ],
   "end_xy": [
    291136.6766657886,
    116087.47997694397
   ]
  },
  "max_100m": {
   "gradient_pct": 12.475762265667045,
   "start_distance_m": 103.0,
   "end_distance_m": 203.0,
   "midpoint_distance_m": 153.0,
   "start_elevation_m": 179.48447722870168,
   "end_elevation_m": 191.96023949436872,
   "start_xy": [
    290564.22636015073,
    115903.99331928158
   ],
   "end_xy": [
    290650.54071934696,
    115952.32869227004
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -14.990450573042722,
   "start_distance_m": 559.0,
   "end_distance_m": 564.0,
   "midpoint_distance_m": 561.5,
   "start_elevation_m": 185.64585622052678,
   "end_elevation_m": 184.89633369187464,
   "start_xy": [
    290997.5474469734,
    116002.2011502661
   ],
   "end_xy": [
    291002.5201239123,
    116001.67915604942
   ]
  },
  "min_10m": {
   "gradient_pct": -11.672648652701696,
   "start_distance_m": 575.0,
   "end_distance_m": 585.0,
   "midpoint_distance_m": 580.0,
   "start_elevation_m": 184.20116728510197,
   "end_elevation_m": 183.0339024198318,
   "start_xy": [
    291013.4599508543,
    116000.5301741561
   ],
   "end_xy": [
    291023.4052717464,
    115999.48587270285
   ]
  },
  "min_20m": {
   "gradient_pct": -9.583969083425501,
   "start_distance_m": 566.0,
   "end_distance_m": 586.0,
   "midpoint_distance_m": 576.0,
   "start_elevation_m": 184.8677618677785,
   "end_elevation_m": 182.9509680510934,
   "start_xy": [
    291004.50917294726,
    116001.470150919
   ],
   "end_xy": [
    291024.39976956486,
    115999.38111654799
   ]
  },
  "min_25m": {
   "gradient_pct": -10.101038144795325,
   "start_distance_m": 560.0,
   "end_distance_m": 585.0,
   "midpoint_distance_m": 572.5,
   "start_elevation_m": 185.55916195603064,
   "end_elevation_m": 183.0339024198318,
   "start_xy": [
    290998.54199811857,
    116002.09690160719
   ],
   "end_xy": [
    291023.4052717464,
    115999.48587270285
   ]
  },
  "min_50m": {
   "gradient_pct": -8.482542581398718,
   "start_distance_m": 556.0,
   "end_distance_m": 606.0,
   "midpoint_distance_m": 581.0,
   "start_elevation_m": 185.82350172873575,
   "end_elevation_m": 181.5822304380364,
   "start_xy": [
    290994.5638921944,
    116002.51483549707
   ],
   "end_xy": [
    291044.2904503717,
    115997.29288212158
   ]
  },
  "min_100m": {
   "gradient_pct": -7.170425622144364,
   "start_distance_m": 552.0,
   "end_distance_m": 652.0,
   "midpoint_distance_m": 602.0,
   "start_elevation_m": 186.03751504669663,
   "end_elevation_m": 178.86708942455226,
   "start_xy": [
    290990.5857182075,
    116002.932121916
   ],
   "end_xy": [
    291089.4899918745,
    115998.61083206184
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 46.84830292628277,
   "start_distance_m": 754.0,
   "end_distance_m": 756.0,
   "midpoint_distance_m": 755.0,
   "start_elevation_m": 184.99923291400677,
   "end_elevation_m": 185.93619897253242,
   "start_xy": [
    291126.7066493478,
    116086.88490501352
   ],
   "end_xy": [
    291128.70047839254,
    116087.04189146741
   ]
  },
  "max_3m": {
   "gradient_pct": 42.32025878430553,
   "start_distance_m": 754.0,
   "end_distance_m": 757.0,
   "midpoint_distance_m": 755.5,
   "start_elevation_m": 184.99923291400677,
   "end_elevation_m": 186.26884067753593,
   "start_xy": [
    291126.7066493478,
    116086.88490501352
   ],
   "end_xy": [
    291129.6973853715,
    116087.12048050048
   ]
  }
 },
 "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": 0.041,
   "obstruction_max_height_m": 8.28,
   "flagged_windows_m": []
  },
  "structure_suppression": {
   "masked_fraction": 0.016,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    1237.0,
    1277.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "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/SS9015.tif"
  ],
  "calculated_at": "2026-08-19T18:20:07+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": [
   "SS9015.tif"
  ],
  "route_summit_trim_m": 269.5,
  "route_summit_trim_loss_m": 5.3,
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.3% over 200 m (Terrain 50), gain 20.1 m over 1288 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. ADOPTED (England launch slice 2026-08-16): clean-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (50.9339, -3.5504)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.9339, -3.5504)'"
 },
 "area": {
  "place": "Loxbeare",
  "county": "Devon"
 }
}