{
 "ocl_version": "0.1.0",
 "name": "Lane near Manely",
 "slug": "discovered-lane-50-3715-4-6264",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 55.618451826428974,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 57.0,
   "end_distance_m": 59.0,
   "start_elevation_m": 5.8886522497963885,
   "end_elevation_m": 7.001021286324968,
   "min_gradient_pct": -58.140034011836406,
   "suppressed_max_gradient_pct": 64.0895549432706,
   "suppressed_location_m": [
    328.0,
    330.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 50.6731498842945,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 56.0,
   "end_distance_m": 59.0,
   "start_elevation_m": 5.480826789796133,
   "end_elevation_m": 7.001021286324968,
   "min_gradient_pct": -53.66210648413651,
   "suppressed_max_gradient_pct": 56.28002384021021,
   "suppressed_location_m": [
    327.0,
    330.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 42.612431052746395,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 55.0,
   "end_distance_m": 60.0,
   "start_elevation_m": 5.229968589290269,
   "end_elevation_m": 7.360590141927589,
   "min_gradient_pct": -38.427672436486944,
   "suppressed_max_gradient_pct": 45.23133254954914,
   "suppressed_location_m": [
    326.0,
    331.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 31.971791102549435,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 51.0,
   "end_distance_m": 61.0,
   "start_elevation_m": 4.413867019119215,
   "end_elevation_m": 7.6110461293741585,
   "min_gradient_pct": -18.624132497800048,
   "suppressed_max_gradient_pct": 33.39292313891541,
   "suppressed_location_m": [
    322.0,
    332.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.10772720735599,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 55.0,
   "end_distance_m": 75.0,
   "start_elevation_m": 5.229968589290269,
   "end_elevation_m": 10.051514030761467,
   "min_gradient_pct": -10.885933617911476,
   "suppressed_max_gradient_pct": 26.406826291560606,
   "suppressed_location_m": [
    312.0,
    332.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.54154886270395,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 50.0,
   "end_distance_m": 75.0,
   "start_elevation_m": 4.166126815085479,
   "end_elevation_m": 10.051514030761467,
   "min_gradient_pct": -9.508822357655504,
   "suppressed_max_gradient_pct": 24.7766765555821,
   "suppressed_location_m": [
    307.0,
    332.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.179318146521467,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 257.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 27.167371389613862,
   "end_elevation_m": 36.757030462874596,
   "min_gradient_pct": -5.729925165568005,
   "suppressed_max_gradient_pct": 21.301703770651343,
   "suppressed_location_m": [
    282.0,
    332.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.275150088813167,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 225.0,
   "end_distance_m": 325.0,
   "start_elevation_m": 21.854500534239907,
   "end_elevation_m": 40.129650623053074,
   "min_gradient_pct": -4.104036996599902,
   "suppressed_max_gradient_pct": 19.934298949914908,
   "suppressed_location_m": [
    232.0,
    332.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.526,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 164.0,
  "shape_class": "stepped"
 },
 "length_m": 1719.6418360690184,
 "start_elevation_m": 4.570525891690697,
 "end_elevation_m": 99.36920830462705,
 "endpoint_gain_m": 94.79868241293636,
 "overall_gradient_pct": 5.512699239141538,
 "accumulated_ascent_m": 111.56475716845162,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 42.612431052746395,
   "start_distance_m": 55.0,
   "end_distance_m": 60.0,
   "midpoint_distance_m": 57.5,
   "start_elevation_m": 5.229968589290269,
   "end_elevation_m": 7.360590141927589,
   "start_xy": [
    212799.77935181814,
    55439.13241453881
   ],
   "end_xy": [
    212795.86954245876,
    55442.244519484695
   ]
  },
  "max_10m": {
   "gradient_pct": 31.971791102549435,
   "start_distance_m": 51.0,
   "end_distance_m": 61.0,
   "midpoint_distance_m": 56.0,
   "start_elevation_m": 4.413867019119215,
   "end_elevation_m": 7.6110461293741585,
   "start_xy": [
    212803.54302191184,
    55437.796704247594
   ],
   "end_xy": [
    212795.0960215503,
    55442.87829021619
   ]
  },
  "max_20m": {
   "gradient_pct": 24.10772720735599,
   "start_distance_m": 55.0,
   "end_distance_m": 75.0,
   "midpoint_distance_m": 65.0,
   "start_elevation_m": 5.229968589290269,
   "end_elevation_m": 10.051514030761467,
   "start_xy": [
    212799.77935181814,
    55439.13241453881
   ],
   "end_xy": [
    212788.12322916984,
    55454.524304524144
   ]
  },
  "max_25m": {
   "gradient_pct": 23.54154886270395,
   "start_distance_m": 50.0,
   "end_distance_m": 75.0,
   "midpoint_distance_m": 62.5,
   "start_elevation_m": 4.166126815085479,
   "end_elevation_m": 10.051514030761467,
   "start_xy": [
    212804.48939884218,
    55437.47363971878
   ],
   "end_xy": [
    212788.12322916984,
    55454.524304524144
   ]
  },
  "max_50m": {
   "gradient_pct": 19.179318146521467,
   "start_distance_m": 257.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 282.0,
   "start_elevation_m": 27.167371389613862,
   "end_elevation_m": 36.757030462874596,
   "start_xy": [
    212834.9860404036,
    55589.64637391714
   ],
   "end_xy": [
    212882.4351272345,
    55603.6118977488
   ]
  },
  "max_100m": {
   "gradient_pct": 18.275150088813167,
   "start_distance_m": 225.0,
   "end_distance_m": 325.0,
   "midpoint_distance_m": 275.0,
   "start_elevation_m": 21.854500534239907,
   "end_elevation_m": 40.129650623053074,
   "start_xy": [
    212806.2547046866,
    55575.55708779875
   ],
   "end_xy": [
    212899.9673661745,
    55607.47496923739
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -38.427672436486944,
   "start_distance_m": 724.0,
   "end_distance_m": 729.0,
   "midpoint_distance_m": 726.5,
   "start_elevation_m": 68.68997446260629,
   "end_elevation_m": 66.76859084078194,
   "start_xy": [
    213263.44656947843,
    55740.447785012475
   ],
   "end_xy": [
    213266.31751671343,
    55736.354173046035
   ]
  },
  "min_10m": {
   "gradient_pct": -18.624132497800048,
   "start_distance_m": 724.0,
   "end_distance_m": 734.0,
   "midpoint_distance_m": 729.0,
   "start_elevation_m": 68.68997446260629,
   "end_elevation_m": 66.82756121282628,
   "start_xy": [
    213263.44656947843,
    55740.447785012475
   ],
   "end_xy": [
    213269.2490625172,
    55732.31615718257
   ]
  },
  "min_20m": {
   "gradient_pct": -10.885933617911476,
   "start_distance_m": 724.0,
   "end_distance_m": 744.0,
   "midpoint_distance_m": 734.0,
   "start_elevation_m": 68.68997446260629,
   "end_elevation_m": 66.51278773902399,
   "start_xy": [
    213263.44656947843,
    55740.447785012475
   ],
   "end_xy": [
    213277.37307802067,
    55726.48862111034
   ]
  },
  "min_25m": {
   "gradient_pct": -9.508822357655504,
   "start_distance_m": 724.0,
   "end_distance_m": 749.0,
   "midpoint_distance_m": 736.5,
   "start_elevation_m": 68.68997446260629,
   "end_elevation_m": 66.31276887319241,
   "start_xy": [
    213263.44656947843,
    55740.447785012475
   ],
   "end_xy": [
    213281.50886090976,
    55723.67998576149
   ]
  },
  "min_50m": {
   "gradient_pct": -5.729925165568005,
   "start_distance_m": 725.0,
   "end_distance_m": 775.0,
   "midpoint_distance_m": 750.0,
   "start_elevation_m": 68.54641911639618,
   "end_elevation_m": 65.68145653361218,
   "start_xy": [
    213264.02050147153,
    55739.62888204673
   ],
   "end_xy": [
    213303.26096717687,
    55709.437592577146
   ]
  },
  "min_100m": {
   "gradient_pct": -4.104036996599902,
   "start_distance_m": 705.0,
   "end_distance_m": 805.0,
   "midpoint_distance_m": 755.0,
   "start_elevation_m": 68.27644564012593,
   "end_elevation_m": 64.17240864352603,
   "start_xy": [
    213250.8214929718,
    55750.54642128041
   ],
   "end_xy": [
    213328.3686060089,
    55693.01809395414
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 55.618451826428974,
   "start_distance_m": 57.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 58.0,
   "start_elevation_m": 5.8886522497963885,
   "end_elevation_m": 7.001021286324968,
   "start_xy": [
    212798.1895418394,
    55440.342519992024
   ],
   "end_xy": [
    212796.64282180683,
    55441.61045404199
   ]
  },
  "max_3m": {
   "gradient_pct": 50.6731498842945,
   "start_distance_m": 56.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 57.5,
   "start_elevation_m": 5.480826789796133,
   "end_elevation_m": 7.001021286324968,
   "start_xy": [
    212798.96242871715,
    55439.7079764096
   ],
   "end_xy": [
    212796.64282180683,
    55441.61045404199
   ]
  }
 },
 "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": 0.066,
   "obstruction_max_height_m": 18.26,
   "flagged_windows_m": []
  },
  "structure_suppression": {
   "masked_fraction": 0.007,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    326.0,
    331.0
   ],
   [
    724.0,
    729.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "extent": [
   "descends_at_start"
  ]
 },
 "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/SX1055.tif"
  ],
  "calculated_at": "2026-08-19T18:09:52+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": [
   "SX1055.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.4% over 200 m (Terrain 50), gain 58.0 m over 1187 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. ADOPTED (England launch slice 2026-08-16): clean-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (50.3715, -4.6264)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.3715, -4.6264)'"
 },
 "area": {
  "place": "Golant",
  "county": "Cornwall"
 }
}