{
 "ocl_version": "0.1.0",
 "name": "Banks to Low Row",
 "slug": "discovered-lane-54-9660-2-6706",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 52.69471101353744,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1546.0,
   "end_distance_m": 1548.0,
   "start_elevation_m": 74.72915459103184,
   "end_elevation_m": 75.78304881130259,
   "min_gradient_pct": -23.18903212528909
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 49.66053336957543,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1545.0,
   "end_distance_m": 1548.0,
   "start_elevation_m": 74.29323281021533,
   "end_elevation_m": 75.78304881130259,
   "min_gradient_pct": -22.289382239758975
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 37.79726740839379,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1544.0,
   "end_distance_m": 1549.0,
   "start_elevation_m": 74.12316771930767,
   "end_elevation_m": 76.01303108972736,
   "min_gradient_pct": -19.018878870201803
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.155841456078917,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1542.0,
   "end_distance_m": 1552.0,
   "start_elevation_m": 73.717671061446,
   "end_elevation_m": 76.43325520705389,
   "min_gradient_pct": -13.64250433545898
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.29584275832579,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1716.0,
   "end_distance_m": 1736.0,
   "start_elevation_m": 91.74922496183412,
   "end_elevation_m": 96.20839351349927,
   "min_gradient_pct": -9.085243409195733
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.162931216043436,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1716.0,
   "end_distance_m": 1741.0,
   "start_elevation_m": 91.74922496183412,
   "end_elevation_m": 97.28995776584497,
   "min_gradient_pct": -8.038058661107556
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.979156617661715,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1708.0,
   "end_distance_m": 1758.0,
   "start_elevation_m": 90.15758804815464,
   "end_elevation_m": 100.6471663569855,
   "min_gradient_pct": -3.8780614271706924
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.56191782020821,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1692.0,
   "end_distance_m": 1792.0,
   "start_elevation_m": 87.80335679430056,
   "end_elevation_m": 105.36527461450876,
   "min_gradient_pct": -3.3292277832726
  }
 ],
 "shape": {
  "ascent_concentration": 0.532,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 166.0,
  "shape_class": "stepped"
 },
 "length_m": 2843.026282340188,
 "start_elevation_m": 52.25800913189123,
 "end_elevation_m": 143.72207736206144,
 "endpoint_gain_m": 91.46406823017021,
 "overall_gradient_pct": 3.217137625434934,
 "accumulated_ascent_m": 113.8926618725904,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 37.79726740839379,
   "start_distance_m": 1544.0,
   "end_distance_m": 1549.0,
   "midpoint_distance_m": 1546.5,
   "start_elevation_m": 74.12316771930767,
   "end_elevation_m": 76.01303108972736,
   "start_xy": [
    357639.6691518037,
    563846.2886320361
   ],
   "end_xy": [
    357643.68493499886,
    563843.3097929523
   ]
  },
  "max_10m": {
   "gradient_pct": 27.155841456078917,
   "start_distance_m": 1542.0,
   "end_distance_m": 1552.0,
   "midpoint_distance_m": 1547.0,
   "start_elevation_m": 73.717671061446,
   "end_elevation_m": 76.43325520705389,
   "start_xy": [
    357638.06301555084,
    563847.4804063827
   ],
   "end_xy": [
    357646.0943832039,
    563841.5224602871
   ]
  },
  "max_20m": {
   "gradient_pct": 22.29584275832579,
   "start_distance_m": 1716.0,
   "end_distance_m": 1736.0,
   "midpoint_distance_m": 1726.0,
   "start_elevation_m": 91.74922496183412,
   "end_elevation_m": 96.20839351349927,
   "start_xy": [
    357797.21676616906,
    563783.5586313349
   ],
   "end_xy": [
    357814.9245077455,
    563774.2615450319
   ]
  },
  "max_25m": {
   "gradient_pct": 22.162931216043436,
   "start_distance_m": 1716.0,
   "end_distance_m": 1741.0,
   "midpoint_distance_m": 1728.5,
   "start_elevation_m": 91.74922496183412,
   "end_elevation_m": 97.28995776584497,
   "start_xy": [
    357797.21676616906,
    563783.5586313349
   ],
   "end_xy": [
    357819.3515690386,
    563771.9375128635
   ]
  },
  "max_50m": {
   "gradient_pct": 20.979156617661715,
   "start_distance_m": 1708.0,
   "end_distance_m": 1758.0,
   "midpoint_distance_m": 1733.0,
   "start_elevation_m": 90.15758804815464,
   "end_elevation_m": 100.6471663569855,
   "start_xy": [
    357790.13375821634,
    563787.2776355135
   ],
   "end_xy": [
    357834.4029194436,
    563764.0345508008
   ]
  },
  "max_100m": {
   "gradient_pct": 17.56191782020821,
   "start_distance_m": 1692.0,
   "end_distance_m": 1792.0,
   "midpoint_distance_m": 1742.0,
   "start_elevation_m": 87.80335679430056,
   "end_elevation_m": 105.36527461450876,
   "start_xy": [
    357775.9672394378,
    563794.7146858481
   ],
   "end_xy": [
    357862.45975578466,
    563745.145238087
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -19.018878870201803,
   "start_distance_m": 976.0,
   "end_distance_m": 981.0,
   "midpoint_distance_m": 978.5,
   "start_elevation_m": 55.52221467344154,
   "end_elevation_m": 54.57127072993145,
   "start_xy": [
    357193.81323942356,
    563709.568721536
   ],
   "end_xy": [
    357197.9947071151,
    563712.3101304733
   ]
  },
  "min_10m": {
   "gradient_pct": -13.64250433545898,
   "start_distance_m": 971.0,
   "end_distance_m": 981.0,
   "midpoint_distance_m": 976.0,
   "start_elevation_m": 55.93552116347735,
   "end_elevation_m": 54.57127072993145,
   "start_xy": [
    357189.63218357536,
    563706.8266849273
   ],
   "end_xy": [
    357197.9947071151,
    563712.3101304733
   ]
  },
  "min_20m": {
   "gradient_pct": -9.085243409195733,
   "start_distance_m": 962.0,
   "end_distance_m": 982.0,
   "midpoint_distance_m": 972.0,
   "start_elevation_m": 56.319450310930165,
   "end_elevation_m": 54.50240162909102,
   "start_xy": [
    357182.10594730906,
    563701.8915300543
   ],
   "end_xy": [
    357198.83093067474,
    563712.8585191504
   ]
  },
  "min_25m": {
   "gradient_pct": -8.038058661107556,
   "start_distance_m": 957.0,
   "end_distance_m": 982.0,
   "midpoint_distance_m": 969.5,
   "start_elevation_m": 56.51191629436791,
   "end_elevation_m": 54.50240162909102,
   "start_xy": [
    357177.9245902753,
    563699.1499515201
   ],
   "end_xy": [
    357198.83093067474,
    563712.8585191504
   ]
  },
  "min_50m": {
   "gradient_pct": -3.8780614271706924,
   "start_distance_m": 932.0,
   "end_distance_m": 982.0,
   "midpoint_distance_m": 957.0,
   "start_elevation_m": 56.441432342676364,
   "end_elevation_m": 54.50240162909102,
   "start_xy": [
    357155.43800024764,
    563689.1221067228
   ],
   "end_xy": [
    357198.83093067474,
    563712.8585191504
   ]
  },
  "min_100m": {
   "gradient_pct": -3.3292277832726,
   "start_distance_m": 1940.0,
   "end_distance_m": 2040.0,
   "midpoint_distance_m": 1990.0,
   "start_elevation_m": 112.70531988013545,
   "end_elevation_m": 109.37609209686285,
   "start_xy": [
    357978.05010740686,
    563652.9064266918
   ],
   "end_xy": [
    358067.97870084585,
    563613.515108084
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 52.69471101353744,
   "start_distance_m": 1546.0,
   "end_distance_m": 1548.0,
   "midpoint_distance_m": 1547.0,
   "start_elevation_m": 74.72915459103184,
   "end_elevation_m": 75.78304881130259,
   "start_xy": [
    357641.2756100461,
    563845.0972919209
   ],
   "end_xy": [
    357642.8817886083,
    563843.9055746137
   ]
  },
  "max_3m": {
   "gradient_pct": 49.66053336957543,
   "start_distance_m": 1545.0,
   "end_distance_m": 1548.0,
   "midpoint_distance_m": 1546.5,
   "start_elevation_m": 74.29323281021533,
   "end_elevation_m": 75.78304881130259,
   "start_xy": [
    357640.4724094628,
    563845.6930004603
   ],
   "end_xy": [
    357642.8817886083,
    563843.9055746137
   ]
  }
 },
 "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": 0.032,
   "obstruction_max_height_m": 14.78,
   "flagged_windows_m": [
    2
   ]
  },
  "review": [
   "short_window_divergence"
  ],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "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/NY5560.tif"
  ],
  "calculated_at": "2026-08-19T18:32:30+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": [
   "NY5560.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.1% over 200 m (Terrain 50), gain 91.4 m over 2768 m way. EXTENDED by graph walk: +0 segment(s) at base, +2 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 (54.9660, -2.6706)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (54.9660, -2.6706)'"
 },
 "area": {
  "place": "Banks",
  "county": "Cumberland"
 }
}