{
 "ocl_version": "0.1.0",
 "name": "Commons Lane",
 "slug": "commons-lane",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.370300042719236,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 180.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 155.94697554348656,
   "end_elevation_m": 156.61438154434094,
   "min_gradient_pct": 0.9240435202968911
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.70230135824094,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 180.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 155.94697554348656,
   "end_elevation_m": 156.8980445842338,
   "min_gradient_pct": 3.021655955863404
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.46561061592206,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 178.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 155.42476405343768,
   "end_elevation_m": 156.8980445842338,
   "min_gradient_pct": 4.072144262659094
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.335382484110426,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 173.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 154.26450633582274,
   "end_elevation_m": 156.8980445842338,
   "min_gradient_pct": 4.771666534289523
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.53418587527196,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 163.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 151.9912074091794,
   "end_elevation_m": 156.8980445842338,
   "min_gradient_pct": 5.170552065843452
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.157863244909322,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 158.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 150.85857877300646,
   "end_elevation_m": 156.8980445842338,
   "min_gradient_pct": 5.296908887449263
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.15481219375681,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 133.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 145.82063848735538,
   "end_elevation_m": 156.8980445842338,
   "min_gradient_pct": 7.487633245553411
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.883383010901014,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 83.0,
   "end_distance_m": 183.0,
   "start_elevation_m": 138.01466157333277,
   "end_elevation_m": 156.8980445842338,
   "min_gradient_pct": 10.328786394117401
  }
 ],
 "shape": {
  "ascent_concentration": 0.37,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 221.0,
  "shape_class": "sustained"
 },
 "length_m": 262.9999999999971,
 "start_elevation_m": 130.09245869189465,
 "end_elevation_m": 167.25470460531665,
 "endpoint_gain_m": 37.162245913422,
 "overall_gradient_pct": 14.130131526016125,
 "accumulated_ascent_m": 37.177334183373375,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.46561061592206,
   "start_distance_m": 178.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 180.5,
   "start_elevation_m": 155.42476405343768,
   "end_elevation_m": 156.8980445842338,
   "start_xy": [
    293128.9859196742,
    70873.31957162572
   ],
   "end_xy": [
    293130.36964974104,
    70878.1242871326
   ]
  },
  "max_10m": {
   "gradient_pct": 26.335382484110426,
   "start_distance_m": 173.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 178.0,
   "start_elevation_m": 154.26450633582274,
   "end_elevation_m": 156.8980445842338,
   "start_xy": [
    293127.60218960734,
    70868.51485611883
   ],
   "end_xy": [
    293130.36964974104,
    70878.1242871326
   ]
  },
  "max_20m": {
   "gradient_pct": 24.53418587527196,
   "start_distance_m": 163.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 173.0,
   "start_elevation_m": 151.9912074091794,
   "end_elevation_m": 156.8980445842338,
   "start_xy": [
    293126.4747510888,
    70858.58105531632
   ],
   "end_xy": [
    293130.36964974104,
    70878.1242871326
   ]
  },
  "max_25m": {
   "gradient_pct": 24.157863244909322,
   "start_distance_m": 158.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 170.5,
   "start_elevation_m": 150.85857877300646,
   "end_elevation_m": 156.8980445842338,
   "start_xy": [
    293125.925256881,
    70853.61134142963
   ],
   "end_xy": [
    293130.36964974104,
    70878.1242871326
   ]
  },
  "max_50m": {
   "gradient_pct": 22.15481219375681,
   "start_distance_m": 133.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 158.0,
   "start_elevation_m": 145.82063848735538,
   "end_elevation_m": 156.8980445842338,
   "start_xy": [
    293123.1777858417,
    70828.76277199619
   ],
   "end_xy": [
    293130.36964974104,
    70878.1242871326
   ]
  },
  "max_100m": {
   "gradient_pct": 18.883383010901014,
   "start_distance_m": 83.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 133.0,
   "start_elevation_m": 138.01466157333277,
   "end_elevation_m": 156.8980445842338,
   "start_xy": [
    293119.8215595012,
    70778.90455085377
   ],
   "end_xy": [
    293130.36964974104,
    70878.1242871326
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 4.072144262659094,
   "start_distance_m": 258.0,
   "end_distance_m": 263.0,
   "midpoint_distance_m": 260.5,
   "start_elevation_m": 167.0510973921837,
   "end_elevation_m": 167.25470460531665,
   "start_xy": [
    293141.6389542798,
    70951.104493571
   ],
   "end_xy": [
    293141.5578726608,
    70956.08882562362
   ]
  },
  "min_10m": {
   "gradient_pct": 4.771666534289523,
   "start_distance_m": 1.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 6.0,
   "start_elevation_m": 130.13956364501152,
   "end_elevation_m": 130.61673029844047,
   "start_xy": [
    293115.80143022625,
    70697.08369811755
   ],
   "end_xy": [
    293115.555732489,
    70707.08067929298
   ]
  },
  "min_20m": {
   "gradient_pct": 5.170552065843452,
   "start_distance_m": 1.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 130.13956364501152,
   "end_elevation_m": 131.1736740581802,
   "start_xy": [
    293115.80143022625,
    70697.08369811755
   ],
   "end_xy": [
    293115.4089674583,
    70717.07374003723
   ]
  },
  "min_25m": {
   "gradient_pct": 5.296908887449263,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 130.09245869189465,
   "end_elevation_m": 131.41668591375696,
   "start_xy": [
    293115.826,
    70696.084
   ],
   "end_xy": [
    293115.82336379343,
    70721.05221658955
   ]
  },
  "min_50m": {
   "gradient_pct": 7.487633245553411,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 130.09245869189465,
   "end_elevation_m": 133.83627531467135,
   "start_xy": [
    293115.826,
    70696.084
   ],
   "end_xy": [
    293117.8534038627,
    70745.96547016021
   ]
  },
  "min_100m": {
   "gradient_pct": 10.328786394117401,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 130.09245869189465,
   "end_elevation_m": 140.42124508601205,
   "start_xy": [
    293115.826,
    70696.084
   ],
   "end_xy": [
    293120.50527549646,
    70795.89079624342
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.370300042719236,
   "start_distance_m": 180.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 181.0,
   "start_elevation_m": 155.94697554348656,
   "end_elevation_m": 156.61438154434094,
   "start_xy": [
    293129.539411701,
    70875.24145782847
   ],
   "end_xy": [
    293130.09290372767,
    70877.16334403123
   ]
  },
  "max_3m": {
   "gradient_pct": 31.70230135824094,
   "start_distance_m": 180.0,
   "end_distance_m": 183.0,
   "midpoint_distance_m": 181.5,
   "start_elevation_m": 155.94697554348656,
   "end_elevation_m": 156.8980445842338,
   "start_xy": [
    293129.539411701,
    70875.24145782847
   ],
   "end_xy": [
    293130.36964974104,
    70878.1242871326
   ]
  }
 },
 "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": 0.144,
   "obstruction_max_height_m": 7.37,
   "flagged_windows_m": []
  },
  "review": [],
  "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/SX9070.tif"
  ],
  "calculated_at": "2026-09-05T05:59:35+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-27-roads.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "summit-260905-summit-england-england-2026-08-27",
  "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": [
   "SX9070.tif"
  ],
  "route_summit_trim_m": 483.2,
  "route_summit_trim_loss_m": 36.0,
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Teignmouth",
  "county": "Devon"
 }
}