{
 "ocl_version": "0.1.0",
 "name": "Crosscrake to Oxenholme",
 "slug": "discovered-lane-54-2920-2-7192",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.74001405650648,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2642.0,
   "end_distance_m": 2644.0,
   "start_elevation_m": 103.49076185341417,
   "end_elevation_m": 104.1055621345443,
   "min_gradient_pct": -26.008866047812518
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.0988061244888,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 2784.0,
   "end_distance_m": 2787.0,
   "start_elevation_m": 127.24949676288696,
   "end_elevation_m": 128.06246094662163,
   "min_gradient_pct": -21.488019191270762
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.502305713809506,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2782.0,
   "end_distance_m": 2787.0,
   "start_elevation_m": 126.78734566093115,
   "end_elevation_m": 128.06246094662163,
   "min_gradient_pct": -21.982064169114608
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.322571404850407,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2779.0,
   "end_distance_m": 2789.0,
   "start_elevation_m": 126.12185958260596,
   "end_elevation_m": 128.454116723091,
   "min_gradient_pct": -17.15731276264293
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.25866251604856,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2779.0,
   "end_distance_m": 2799.0,
   "start_elevation_m": 126.12185958260596,
   "end_elevation_m": 130.57359208581568,
   "min_gradient_pct": -14.018796124691093
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.895456045532228,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2771.0,
   "end_distance_m": 2796.0,
   "start_elevation_m": 124.48729819614192,
   "end_elevation_m": 129.96116220752498,
   "min_gradient_pct": -12.335559958801525
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.126158735713314,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2765.0,
   "end_distance_m": 2815.0,
   "start_elevation_m": 123.29851568258343,
   "end_elevation_m": 133.8615950504401,
   "min_gradient_pct": -8.623589710224934
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.841382388854328,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2714.0,
   "end_distance_m": 2814.0,
   "start_elevation_m": 114.87888392640909,
   "end_elevation_m": 133.72026631526342,
   "min_gradient_pct": -7.99656863184498
  }
 ],
 "shape": {
  "ascent_concentration": 0.384,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 220.0,
  "shape_class": "sustained"
 },
 "length_m": 2960.999999999999,
 "start_elevation_m": 62.162169833125816,
 "end_elevation_m": 146.20634996385243,
 "endpoint_gain_m": 84.04418013072662,
 "overall_gradient_pct": 2.8383715005311263,
 "accumulated_ascent_m": 136.25384750606025,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.502305713809506,
   "start_distance_m": 2782.0,
   "end_distance_m": 2787.0,
   "midpoint_distance_m": 2784.5,
   "start_elevation_m": 126.78734566093115,
   "end_elevation_m": 128.06246094662163,
   "start_xy": [
    353730.59072077024,
    489414.62136542547
   ],
   "end_xy": [
    353730.7107341975,
    489419.61992489535
   ]
  },
  "max_10m": {
   "gradient_pct": 23.322571404850407,
   "start_distance_m": 2779.0,
   "end_distance_m": 2789.0,
   "midpoint_distance_m": 2784.0,
   "start_elevation_m": 126.12185958260596,
   "end_elevation_m": 128.454116723091,
   "start_xy": [
    353730.51872923353,
    489411.6222293469
   ],
   "end_xy": [
    353730.75872037944,
    489421.61934914405
   ]
  },
  "max_20m": {
   "gradient_pct": 22.25866251604856,
   "start_distance_m": 2779.0,
   "end_distance_m": 2799.0,
   "midpoint_distance_m": 2789.0,
   "start_elevation_m": 126.12185958260596,
   "end_elevation_m": 130.57359208581568,
   "start_xy": [
    353730.51872923353,
    489411.6222293469
   ],
   "end_xy": [
    353730.99872324785,
    489431.6164686597
   ]
  },
  "max_25m": {
   "gradient_pct": 21.895456045532228,
   "start_distance_m": 2771.0,
   "end_distance_m": 2796.0,
   "midpoint_distance_m": 2783.5,
   "start_elevation_m": 124.48729819614192,
   "end_elevation_m": 129.96116220752498,
   "start_xy": [
    353729.7421179021,
    489403.75805774843
   ],
   "end_xy": [
    353730.9267199887,
    489428.61733286263
   ]
  },
  "max_50m": {
   "gradient_pct": 21.126158735713314,
   "start_distance_m": 2765.0,
   "end_distance_m": 2815.0,
   "midpoint_distance_m": 2790.0,
   "start_elevation_m": 123.29851568258343,
   "end_elevation_m": 133.8615950504401,
   "start_xy": [
    353727.0792548835,
    489398.3813341793
   ],
   "end_xy": [
    353731.3817331981,
    489447.6118832564
   ]
  },
  "max_100m": {
   "gradient_pct": 18.841382388854328,
   "start_distance_m": 2714.0,
   "end_distance_m": 2814.0,
   "midpoint_distance_m": 2764.0,
   "start_elevation_m": 114.87888392640909,
   "end_elevation_m": 133.72026631526342,
   "start_xy": [
    353727.9055077854,
    489350.3145209067
   ],
   "end_xy": [
    353731.3577278421,
    489446.61217142653
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -21.982064169114608,
   "start_distance_m": 1993.0,
   "end_distance_m": 1998.0,
   "midpoint_distance_m": 1995.5,
   "start_elevation_m": 100.27923633312082,
   "end_elevation_m": 99.18013312466509,
   "start_xy": [
    353318.491525021,
    488773.872051238
   ],
   "end_xy": [
    353321.6900105926,
    488777.7151861651
   ]
  },
  "min_10m": {
   "gradient_pct": -17.15731276264293,
   "start_distance_m": 2275.0,
   "end_distance_m": 2285.0,
   "midpoint_distance_m": 2280.0,
   "start_elevation_m": 108.94133365369869,
   "end_elevation_m": 107.2256023774344,
   "start_xy": [
    353447.3783640135,
    489021.51317242853
   ],
   "end_xy": [
    353454.9578382465,
    489028.0363278848
   ]
  },
  "min_20m": {
   "gradient_pct": -14.018796124691093,
   "start_distance_m": 2268.0,
   "end_distance_m": 2288.0,
   "midpoint_distance_m": 2278.0,
   "start_elevation_m": 109.59465836052154,
   "end_elevation_m": 106.79089913558332,
   "start_xy": [
    353442.14118446823,
    489016.8789866531
   ],
   "end_xy": [
    353457.2315545737,
    489029.99342084816
   ]
  },
  "min_25m": {
   "gradient_pct": -12.335559958801525,
   "start_distance_m": 2267.0,
   "end_distance_m": 2292.0,
   "midpoint_distance_m": 2279.5,
   "start_elevation_m": 109.67247122228112,
   "end_elevation_m": 106.58858123258074,
   "start_xy": [
    353441.5547953495,
    489016.0710876445
   ],
   "end_xy": [
    353460.2631107936,
    489032.6029542853
   ]
  },
  "min_50m": {
   "gradient_pct": -8.623589710224934,
   "start_distance_m": 1949.0,
   "end_distance_m": 1999.0,
   "midpoint_distance_m": 1974.0,
   "start_elevation_m": 103.32582795486714,
   "end_elevation_m": 99.01403309975467,
   "start_xy": [
    353290.3423276178,
    488740.05456709076
   ],
   "end_xy": [
    353322.32966627605,
    488778.48384773085
   ]
  },
  "min_100m": {
   "gradient_pct": -7.99656863184498,
   "start_distance_m": 1899.0,
   "end_distance_m": 1999.0,
   "midpoint_distance_m": 1949.0,
   "start_elevation_m": 107.01060173159965,
   "end_elevation_m": 99.01403309975467,
   "start_xy": [
    353257.5502673306,
    488702.3145102194
   ],
   "end_xy": [
    353322.32966627605,
    488778.48384773085
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.74001405650648,
   "start_distance_m": 2642.0,
   "end_distance_m": 2644.0,
   "midpoint_distance_m": 2643.0,
   "start_elevation_m": 103.49076185341417,
   "end_elevation_m": 104.1055621345443,
   "start_xy": [
    353696.3039784179,
    489287.12491144193
   ],
   "end_xy": [
    353697.71088287793,
    489288.5463960843
   ]
  },
  "max_3m": {
   "gradient_pct": 27.0988061244888,
   "start_distance_m": 2784.0,
   "end_distance_m": 2787.0,
   "midpoint_distance_m": 2785.5,
   "start_elevation_m": 127.24949676288696,
   "end_elevation_m": 128.06246094662163,
   "start_xy": [
    353730.6387309384,
    489416.6207890982
   ],
   "end_xy": [
    353730.7107341975,
    489419.61992489535
   ]
  }
 },
 "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": 0.058,
   "obstruction_max_height_m": 15.42,
   "flagged_windows_m": [
    2
   ]
  },
  "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/SD5085.tif"
  ],
  "calculated_at": "2026-08-19T18:29:50+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": [
   "SD5085.tif"
  ],
  "route_summit_trim_m": 317.6,
  "route_summit_trim_loss_m": 21.0,
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 16.1% over 200 m (Terrain 50), gain 38.9 m over 2251 m way. EXTENDED by graph walk: +2 segment(s) at base, +0 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 (54.2920, -2.7192)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (54.2920, -2.7192)'"
 },
 "area": {
  "place": "Barrows Green",
  "county": "Westmorland and Furness"
 }
}