{
 "ocl_version": "0.1.0",
 "name": "Glen Cune to Kellah",
 "slug": "discovered-lane-54-9457-2-5346",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.864292367779285,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 31.0,
   "end_distance_m": 33.0,
   "start_elevation_m": 172.74479336814875,
   "end_elevation_m": 173.52207921550433,
   "min_gradient_pct": -10.014835653905152
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.84017899219047,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 31.0,
   "end_distance_m": 34.0,
   "start_elevation_m": 172.74479336814875,
   "end_elevation_m": 173.87999873791446,
   "min_gradient_pct": -9.781736454908696
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 35.0351305441319,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 30.0,
   "end_distance_m": 35.0,
   "start_elevation_m": 172.4306574511863,
   "end_elevation_m": 174.1824139783929,
   "min_gradient_pct": -9.719948659680995
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 31.894064530394246,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 25.0,
   "end_distance_m": 35.0,
   "start_elevation_m": 170.99300752535348,
   "end_elevation_m": 174.1824139783929,
   "min_gradient_pct": -9.144289303660571
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 30.11650182396636,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 24.0,
   "end_distance_m": 44.0,
   "start_elevation_m": 170.72800641153646,
   "end_elevation_m": 176.75130677632973,
   "min_gradient_pct": -8.790309410787671
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 29.62628919781298,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 30.0,
   "end_distance_m": 55.0,
   "start_elevation_m": 172.4306574511863,
   "end_elevation_m": 179.83722975063955,
   "min_gradient_pct": -8.568589096322853
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 27.034998261610667,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 5.0,
   "end_distance_m": 55.0,
   "start_elevation_m": 166.31973061983422,
   "end_elevation_m": 179.83722975063955,
   "min_gradient_pct": -6.325192901953699
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.460613350601136,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "start_elevation_m": 165.21634251709457,
   "end_elevation_m": 183.6769558676957,
   "min_gradient_pct": -4.537726526706535
  }
 ],
 "shape": {
  "ascent_concentration": 0.537,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 63.0,
  "shape_class": "stepped"
 },
 "length_m": 814.0000000000389,
 "start_elevation_m": 165.21634251709457,
 "end_elevation_m": 212.70283580076872,
 "endpoint_gain_m": 47.48649328367415,
 "overall_gradient_pct": 5.833721533620625,
 "accumulated_ascent_m": 53.26582226902963,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 35.0351305441319,
   "start_distance_m": 30.0,
   "end_distance_m": 35.0,
   "midpoint_distance_m": 32.5,
   "start_elevation_m": 172.4306574511863,
   "end_elevation_m": 174.1824139783929,
   "start_xy": [
    366505.6488874406,
    561516.9739745128
   ],
   "end_xy": [
    366500.77227250073,
    561515.8700617035
   ]
  },
  "max_10m": {
   "gradient_pct": 31.894064530394246,
   "start_distance_m": 25.0,
   "end_distance_m": 35.0,
   "midpoint_distance_m": 30.0,
   "start_elevation_m": 170.99300752535348,
   "end_elevation_m": 174.1824139783929,
   "start_xy": [
    366510.52523850056,
    561518.0790537604
   ],
   "end_xy": [
    366500.77227250073,
    561515.8700617035
   ]
  },
  "max_20m": {
   "gradient_pct": 30.11650182396636,
   "start_distance_m": 24.0,
   "end_distance_m": 44.0,
   "midpoint_distance_m": 34.0,
   "start_elevation_m": 170.72800641153646,
   "end_elevation_m": 176.75130677632973,
   "start_xy": [
    366511.5007625609,
    561518.2989464789
   ],
   "end_xy": [
    366491.9946157068,
    561513.8819133765
   ]
  },
  "max_25m": {
   "gradient_pct": 29.62628919781298,
   "start_distance_m": 30.0,
   "end_distance_m": 55.0,
   "midpoint_distance_m": 42.5,
   "start_elevation_m": 172.4306574511863,
   "end_elevation_m": 179.83722975063955,
   "start_xy": [
    366505.6488874406,
    561516.9739745128
   ],
   "end_xy": [
    366481.2661256727,
    561511.4530284858
   ]
  },
  "max_50m": {
   "gradient_pct": 27.034998261610667,
   "start_distance_m": 5.0,
   "end_distance_m": 55.0,
   "midpoint_distance_m": 30.0,
   "start_elevation_m": 166.31973061983422,
   "end_elevation_m": 179.83722975063955,
   "start_xy": [
    366530.03138506005,
    561522.4960871909
   ],
   "end_xy": [
    366481.2661256727,
    561511.4530284858
   ]
  },
  "max_100m": {
   "gradient_pct": 18.460613350601136,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 165.21634251709457,
   "end_elevation_m": 183.6769558676957,
   "start_xy": [
    366534.908,
    561523.6
   ],
   "end_xy": [
    366437.3774322324,
    561501.5140978723
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.719948659680995,
   "start_distance_m": 628.0,
   "end_distance_m": 633.0,
   "midpoint_distance_m": 630.5,
   "start_elevation_m": 209.8382364368593,
   "end_elevation_m": 209.35223900387524,
   "start_xy": [
    365916.67317965993,
    561459.2739961797
   ],
   "end_xy": [
    365912.10412367084,
    561457.3266058646
   ]
  },
  "min_10m": {
   "gradient_pct": -9.144289303660571,
   "start_distance_m": 626.0,
   "end_distance_m": 636.0,
   "midpoint_distance_m": 631.0,
   "start_elevation_m": 210.01069543000426,
   "end_elevation_m": 209.0962664996382,
   "start_xy": [
    365918.62687690224,
    561459.7018594238
   ],
   "end_xy": [
    365909.45861148974,
    561455.9119455914
   ]
  },
  "min_20m": {
   "gradient_pct": -8.790309410787671,
   "start_distance_m": 620.0,
   "end_distance_m": 640.0,
   "midpoint_distance_m": 630.0,
   "start_elevation_m": 210.52171306619118,
   "end_elevation_m": 208.76365118403365,
   "start_xy": [
    365924.50448861805,
    561460.8845173864
   ],
   "end_xy": [
    365906.3162710251,
    561453.518393662
   ]
  },
  "min_25m": {
   "gradient_pct": -8.568589096322853,
   "start_distance_m": 619.0,
   "end_distance_m": 644.0,
   "midpoint_distance_m": 631.5,
   "start_elevation_m": 210.59447168806994,
   "end_elevation_m": 208.45232441398923,
   "start_xy": [
    365925.4991433826,
    561460.9877686114
   ],
   "end_xy": [
    365903.66509123106,
    561450.5231905461
   ]
  },
  "min_50m": {
   "gradient_pct": -6.325192901953699,
   "start_distance_m": 612.0,
   "end_distance_m": 662.0,
   "midpoint_distance_m": 637.0,
   "start_elevation_m": 210.8642820303553,
   "end_elevation_m": 207.70168557937845,
   "start_xy": [
    365932.461606576,
    561461.7117130426
   ],
   "end_xy": [
    365894.5290429764,
    561435.1177971427
   ]
  },
  "min_100m": {
   "gradient_pct": -4.537726526706535,
   "start_distance_m": 557.0,
   "end_distance_m": 657.0,
   "midpoint_distance_m": 607.0,
   "start_elevation_m": 212.36077598197107,
   "end_elevation_m": 207.82304945526454,
   "start_xy": [
    365987.1632672242,
    561467.4307837515
   ],
   "end_xy": [
    365896.8459384366,
    561439.5485970947
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.864292367779285,
   "start_distance_m": 31.0,
   "end_distance_m": 33.0,
   "midpoint_distance_m": 32.0,
   "start_elevation_m": 172.74479336814875,
   "end_elevation_m": 173.52207921550433,
   "start_xy": [
    366504.6735782026,
    561516.753130925
   ],
   "end_xy": [
    366502.72284218896,
    561516.3119642296
   ]
  },
  "max_3m": {
   "gradient_pct": 37.84017899219047,
   "start_distance_m": 31.0,
   "end_distance_m": 34.0,
   "midpoint_distance_m": 32.5,
   "start_elevation_m": 172.74479336814875,
   "end_elevation_m": 173.87999873791446,
   "start_xy": [
    366504.6735782026,
    561516.753130925
   ],
   "end_xy": [
    366501.74758173875,
    561516.0909052913
   ]
  }
 },
 "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": 0.017,
   "obstruction_max_height_m": 11.3,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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/NY6560.tif"
  ],
  "calculated_at": "2026-08-19T18:32:26+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": [
   "NY6560.tif"
  ],
  "route_summit_trim_m": 220.7,
  "route_summit_trim_loss_m": 5.7,
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.2% over 200 m (Terrain 50), gain 36.3 m over 942 m way. EXTENDED by graph walk: +0 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): qualified-steep. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (54.9457, -2.5346)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (54.9457, -2.5346)'"
 },
 "area": {
  "place": "Glen Cune",
  "county": "Northumberland"
 }
}