{
 "ocl_version": "0.1.0",
 "name": "Lane near Cotleigh",
 "slug": "discovered-lane-50-8166-3-1203",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 54.231477767010716,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 203.0,
   "end_distance_m": 205.0,
   "start_elevation_m": 117.89719540645955,
   "end_elevation_m": 118.98182496179976,
   "min_gradient_pct": -51.46971050100433
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 50.06547257119772,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 203.0,
   "end_distance_m": 206.0,
   "start_elevation_m": 117.89719540645955,
   "end_elevation_m": 119.39915958359548,
   "min_gradient_pct": -45.41738561252989
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 35.94696637486777,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 202.0,
   "end_distance_m": 207.0,
   "start_elevation_m": 117.73206054360395,
   "end_elevation_m": 119.52940886234734,
   "min_gradient_pct": -34.22484002602857
  },
  {
   "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": 23.787041120887405,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 217.0,
   "end_distance_m": 267.0,
   "start_elevation_m": 120.5747583333139,
   "end_elevation_m": 132.4682788937576,
   "min_gradient_pct": -4.251956715895744
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.417639555201788,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 202.0,
   "end_distance_m": 302.0,
   "start_elevation_m": 117.73206054360395,
   "end_elevation_m": 138.14970009880574,
   "min_gradient_pct": -1.4667116347606282
  }
 ],
 "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": 35.94696637486777,
   "start_distance_m": 202.0,
   "end_distance_m": 207.0,
   "midpoint_distance_m": 204.5,
   "start_elevation_m": 117.73206054360395,
   "end_elevation_m": 119.52940886234734,
   "start_xy": [
    321024.550252993,
    102201.14158070067
   ],
   "end_xy": [
    321024.76740933,
    102206.13686278733
   ]
  },
  "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": 23.787041120887405,
   "start_distance_m": 217.0,
   "end_distance_m": 267.0,
   "midpoint_distance_m": 242.0,
   "start_elevation_m": 120.5747583333139,
   "end_elevation_m": 132.4682788937576,
   "start_xy": [
    321028.5786114566,
    102214.90024026578
   ],
   "end_xy": [
    321068.17191086255,
    102243.67606155449
   ]
  },
  "max_100m": {
   "gradient_pct": 20.417639555201788,
   "start_distance_m": 202.0,
   "end_distance_m": 302.0,
   "midpoint_distance_m": 252.0,
   "start_elevation_m": 117.73206054360395,
   "end_elevation_m": 138.14970009880574,
   "start_xy": [
    321024.550252993,
    102201.14158070067
   ],
   "end_xy": [
    321086.3622447686,
    102270.14729135518
   ]
  }
 },
 "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": 54.231477767010716,
   "start_distance_m": 203.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 204.0,
   "start_elevation_m": 117.89719540645955,
   "end_elevation_m": 118.98182496179976,
   "start_xy": [
    321024.5936842604,
    102202.140637118
   ],
   "end_xy": [
    321024.6805467952,
    102204.13874995266
   ]
  },
  "max_3m": {
   "gradient_pct": 50.06547257119772,
   "start_distance_m": 203.0,
   "end_distance_m": 206.0,
   "midpoint_distance_m": 204.5,
   "start_elevation_m": 117.89719540645955,
   "end_elevation_m": 119.39915958359548,
   "start_xy": [
    321024.5936842604,
    102202.140637118
   ],
   "end_xy": [
    321024.7239780626,
    102205.13780637
   ]
  }
 },
 "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": []
  },
  "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": "2026-08-15T05:29:34+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": [
   "ST2000.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 9.5% over 200 m (Terrain 50), gain 27.6 m over 695 m way. EXTENDED by graph walk: +2 segment(s) at base, +1 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-50-8183-3-1283, discovered-lane-50-8198-3-1201",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.8166, -3.1203)'"
 },
 "area": {
  "place": "Cotleigh",
  "county": "Devon"
 }
}