{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.1070, -5.3131)",
 "slug": "discovered-lane-50-1070-5-3131",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.2658831934712,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 74.0,
   "end_distance_m": 76.0,
   "start_elevation_m": 29.35359940459199,
   "end_elevation_m": 30.158917068461413,
   "min_gradient_pct": -16.80618977078847
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.03249936367353,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 74.0,
   "end_distance_m": 77.0,
   "start_elevation_m": 29.35359940459199,
   "end_elevation_m": 30.434574385502195,
   "min_gradient_pct": -14.958106757878417
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.444183399568374,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 106.0,
   "end_distance_m": 111.0,
   "start_elevation_m": 34.102957875688986,
   "end_elevation_m": 35.725167045667405,
   "min_gradient_pct": -10.938896685788322
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 30.723631934908656,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 105.0,
   "end_distance_m": 115.0,
   "start_elevation_m": 33.88121058470031,
   "end_elevation_m": 36.95357377819118,
   "min_gradient_pct": -5.588367967282828
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.166035210291383,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 97.0,
   "end_distance_m": 117.0,
   "start_elevation_m": 32.58260695480275,
   "end_elevation_m": 37.415813996861026,
   "min_gradient_pct": -2.977540111414765
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.05368261985582,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 92.0,
   "end_distance_m": 117.0,
   "start_elevation_m": 31.65239334189707,
   "end_elevation_m": 37.415813996861026,
   "min_gradient_pct": -2.3311023624930414
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.413222088890826,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 87.0,
   "end_distance_m": 137.0,
   "start_elevation_m": 31.0088196765503,
   "end_elevation_m": 40.21543072099571,
   "min_gradient_pct": -1.7876376559686094
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.640095683423294,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 91.0,
   "end_distance_m": 191.0,
   "start_elevation_m": 31.50850571941243,
   "end_elevation_m": 47.14860140283572,
   "min_gradient_pct": -1.345037598396928
  }
 ],
 "shape": {
  "ascent_concentration": 0.633,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 203.0,
  "shape_class": "stepped"
 },
 "length_m": 971.7861018298862,
 "start_elevation_m": 26.33372201919558,
 "end_elevation_m": 74.88683772781405,
 "endpoint_gain_m": 48.55311570861848,
 "overall_gradient_pct": 4.996275992956918,
 "accumulated_ascent_m": 52.71660364459939,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.444183399568374,
   "start_distance_m": 106.0,
   "end_distance_m": 111.0,
   "midpoint_distance_m": 108.5,
   "start_elevation_m": 34.102957875688986,
   "end_elevation_m": 35.725167045667405,
   "start_xy": [
    162898.62852828729,
    28148.046697646827
   ],
   "end_xy": [
    162902.8601022356,
    28145.424618972673
   ]
  },
  "max_10m": {
   "gradient_pct": 30.723631934908656,
   "start_distance_m": 105.0,
   "end_distance_m": 115.0,
   "midpoint_distance_m": 110.0,
   "start_elevation_m": 33.88121058470031,
   "end_elevation_m": 36.95357377819118,
   "start_xy": [
    162897.98210318256,
    28148.809675093402
   ],
   "end_xy": [
    162906.317497758,
    28143.413048391783
   ]
  },
  "max_20m": {
   "gradient_pct": 24.166035210291383,
   "start_distance_m": 97.0,
   "end_distance_m": 117.0,
   "midpoint_distance_m": 107.0,
   "start_elevation_m": 32.58260695480275,
   "end_elevation_m": 37.415813996861026,
   "start_xy": [
    162892.81070234475,
    28154.91349466599
   ],
   "end_xy": [
    162908.04619551916,
    28142.40726310134
   ]
  },
  "max_25m": {
   "gradient_pct": 23.05368261985582,
   "start_distance_m": 92.0,
   "end_distance_m": 117.0,
   "midpoint_distance_m": 104.5,
   "start_elevation_m": 31.65239334189707,
   "end_elevation_m": 37.415813996861026,
   "start_xy": [
    162889.5785768211,
    28158.72838189886
   ],
   "end_xy": [
    162908.04619551916,
    28142.40726310134
   ]
  },
  "max_50m": {
   "gradient_pct": 18.413222088890826,
   "start_distance_m": 87.0,
   "end_distance_m": 137.0,
   "midpoint_distance_m": 112.0,
   "start_elevation_m": 31.0088196765503,
   "end_elevation_m": 40.21543072099571,
   "start_xy": [
    162886.3464512975,
    28162.54326913173
   ],
   "end_xy": [
    162926.62156720605,
    28136.398460141034
   ]
  },
  "max_100m": {
   "gradient_pct": 15.640095683423294,
   "start_distance_m": 91.0,
   "end_distance_m": 191.0,
   "midpoint_distance_m": 141.0,
   "start_elevation_m": 31.50850571941243,
   "end_elevation_m": 47.14860140283572,
   "start_xy": [
    162888.93215171638,
    28159.491359345433
   ],
   "end_xy": [
    162978.1468964285,
    28151.51863438406
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -10.938896685788322,
   "start_distance_m": 13.0,
   "end_distance_m": 18.0,
   "midpoint_distance_m": 15.5,
   "start_elevation_m": 26.26822570662442,
   "end_elevation_m": 25.721280872335004,
   "start_xy": [
    162831.3100740596,
    28210.95039500985
   ],
   "end_xy": [
    162835.77548715944,
    28208.700931552103
   ]
  },
  "min_10m": {
   "gradient_pct": -5.588367967282828,
   "start_distance_m": 8.0,
   "end_distance_m": 18.0,
   "midpoint_distance_m": 13.0,
   "start_elevation_m": 26.280117669063287,
   "end_elevation_m": 25.721280872335004,
   "start_xy": [
    162826.84466095976,
    28213.1998584676
   ],
   "end_xy": [
    162835.77548715944,
    28208.700931552103
   ]
  },
  "min_20m": {
   "gradient_pct": -2.977540111414765,
   "start_distance_m": 1.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 26.33506905393252,
   "end_elevation_m": 25.73956103164957,
   "start_xy": [
    162820.59308261998,
    28216.349107308448
   ],
   "end_xy": [
    162838.45473501936,
    28207.351253477456
   ]
  },
  "min_25m": {
   "gradient_pct": -2.3311023624930414,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 26.33372201919558,
   "end_elevation_m": 25.75094642857232,
   "start_xy": [
    162819.7,
    28216.799
   ],
   "end_xy": [
    162841.99905347542,
    28205.50860945677
   ]
  },
  "min_50m": {
   "gradient_pct": -1.7876376559686094,
   "start_distance_m": 679.0,
   "end_distance_m": 729.0,
   "midpoint_distance_m": 704.0,
   "start_elevation_m": 70.40457147308413,
   "end_elevation_m": 69.51075264509983,
   "start_xy": [
    163437.380732228,
    28298.270243828087
   ],
   "end_xy": [
    163485.45612773942,
    28311.917666227273
   ]
  },
  "min_100m": {
   "gradient_pct": -1.345037598396928,
   "start_distance_m": 643.0,
   "end_distance_m": 743.0,
   "midpoint_distance_m": 693.0,
   "start_elevation_m": 70.72162612869542,
   "end_elevation_m": 69.37658853029849,
   "start_xy": [
    163402.6009419476,
    28289.05656401553
   ],
   "end_xy": [
    163498.79980902225,
    28316.15395821697
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.2658831934712,
   "start_distance_m": 74.0,
   "end_distance_m": 76.0,
   "midpoint_distance_m": 75.0,
   "start_elevation_m": 29.35359940459199,
   "end_elevation_m": 30.158917068461413,
   "start_xy": [
    162877.94292493604,
    28172.46197593719
   ],
   "end_xy": [
    162879.2357751455,
    28170.93602104404
   ]
  },
  "max_3m": {
   "gradient_pct": 36.03249936367353,
   "start_distance_m": 74.0,
   "end_distance_m": 77.0,
   "midpoint_distance_m": 75.5,
   "start_elevation_m": 29.35359940459199,
   "end_elevation_m": 30.434574385502195,
   "start_xy": [
    162877.94292493604,
    28172.46197593719
   ],
   "end_xy": [
    162879.88220025023,
    28170.173043597468
   ]
  }
 },
 "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": 0.016,
   "obstruction_max_height_m": 6.08,
   "flagged_windows_m": [
    20,
    25
   ]
  },
  "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/SW6025.tif"
  ],
  "calculated_at": "2026-09-05T01:09:30+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106792346/hunt-gb/regions/region-10.osm.pbf",
  "osm_snapshot": "",
  "run_id": "hunt-england-260905",
  "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": [
   "SW6025.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Sithney",
  "county": "Cornwall"
 }
}