{
 "ocl_version": "0.1.0",
 "name": "Station Lane",
 "slug": "station-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.793762366036788,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 418.0,
   "end_distance_m": 420.0,
   "start_elevation_m": 177.0346660877491,
   "end_elevation_m": 177.55054133506982,
   "min_gradient_pct": -0.5179440748960928,
   "suppressed_max_gradient_pct": 60.84096741987821,
   "suppressed_location_m": [
    511.0,
    513.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.418577271451188,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 418.0,
   "end_distance_m": 421.0,
   "start_elevation_m": 177.0346660877491,
   "end_elevation_m": 177.79722340589262,
   "min_gradient_pct": 0.28687651584959895,
   "suppressed_max_gradient_pct": 49.85872383735265,
   "suppressed_location_m": [
    510.0,
    513.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.81805792945181,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 418.0,
   "end_distance_m": 423.0,
   "start_elevation_m": 177.0346660877491,
   "end_elevation_m": 178.27556898422168,
   "min_gradient_pct": 1.2528116149911739,
   "suppressed_max_gradient_pct": 39.39474304420628,
   "suppressed_location_m": [
    509.0,
    514.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.690451436620776,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 418.0,
   "end_distance_m": 428.0,
   "start_elevation_m": 177.0346660877491,
   "end_elevation_m": 179.40371123141117,
   "min_gradient_pct": 2.6471334947774494,
   "suppressed_max_gradient_pct": 30.124456345000397,
   "suppressed_location_m": [
    504.0,
    514.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.293878605158568,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 408.0,
   "end_distance_m": 428.0,
   "start_elevation_m": 174.94493551037945,
   "end_elevation_m": 179.40371123141117,
   "min_gradient_pct": 4.003935969358707,
   "suppressed_max_gradient_pct": 25.89764214511561,
   "suppressed_location_m": [
    494.0,
    514.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.913142196459376,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 406.0,
   "end_distance_m": 431.0,
   "start_elevation_m": 174.52137813480903,
   "end_elevation_m": 179.99966368392387,
   "min_gradient_pct": 4.890120184021612,
   "suppressed_max_gradient_pct": 24.675789389397323,
   "suppressed_location_m": [
    489.0,
    514.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.83734156592749,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 385.0,
   "end_distance_m": 435.0,
   "start_elevation_m": 171.2704393816393,
   "end_elevation_m": 180.68911016460305,
   "min_gradient_pct": 6.363107053144802,
   "suppressed_max_gradient_pct": 19.3467909898107,
   "suppressed_location_m": [
    464.0,
    514.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.28632071522472,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 407.0,
   "end_distance_m": 507.0,
   "start_elevation_m": 174.72804002092246,
   "end_elevation_m": 192.01436073614718,
   "min_gradient_pct": 6.877382375189853,
   "suppressed_max_gradient_pct": 18.215404070742153,
   "suppressed_location_m": [
    414.0,
    514.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.363,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 147.0,
  "shape_class": "sustained"
 },
 "length_m": 518.9747546576672,
 "start_elevation_m": 130.74066915136817,
 "end_elevation_m": 194.88472237646522,
 "endpoint_gain_m": 64.14405322509705,
 "overall_gradient_pct": 12.359763678179023,
 "accumulated_ascent_m": 64.18441061358936,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.81805792945181,
   "start_distance_m": 418.0,
   "end_distance_m": 423.0,
   "midpoint_distance_m": 420.5,
   "start_elevation_m": 177.0346660877491,
   "end_elevation_m": 178.27556898422168,
   "start_xy": [
    409925.944371155,
    415582.3651642019
   ],
   "end_xy": [
    409924.22321567655,
    415587.0595886039
   ]
  },
  "max_10m": {
   "gradient_pct": 23.690451436620776,
   "start_distance_m": 418.0,
   "end_distance_m": 428.0,
   "midpoint_distance_m": 423.0,
   "start_elevation_m": 177.0346660877491,
   "end_elevation_m": 179.40371123141117,
   "start_xy": [
    409925.944371155,
    415582.3651642019
   ],
   "end_xy": [
    409922.5023831753,
    415591.7541313907
   ]
  },
  "max_20m": {
   "gradient_pct": 22.293878605158568,
   "start_distance_m": 408.0,
   "end_distance_m": 428.0,
   "midpoint_distance_m": 418.0,
   "start_elevation_m": 174.94493551037945,
   "end_elevation_m": 179.40371123141117,
   "start_xy": [
    409929.5914629131,
    415573.06320124044
   ],
   "end_xy": [
    409922.5023831753,
    415591.7541313907
   ]
  },
  "max_25m": {
   "gradient_pct": 21.913142196459376,
   "start_distance_m": 406.0,
   "end_distance_m": 431.0,
   "midpoint_distance_m": 418.5,
   "start_elevation_m": 174.52137813480903,
   "end_elevation_m": 179.99966368392387,
   "start_xy": [
    409930.48703902046,
    415571.27492195903
   ],
   "end_xy": [
    409921.470412586,
    415594.57105110964
   ]
  },
  "max_50m": {
   "gradient_pct": 18.83734156592749,
   "start_distance_m": 385.0,
   "end_distance_m": 435.0,
   "midpoint_distance_m": 410.0,
   "start_elevation_m": 171.2704393816393,
   "end_elevation_m": 180.68911016460305,
   "start_xy": [
    409938.6226977856,
    415551.92477622227
   ],
   "end_xy": [
    409920.09324741527,
    415598.3265019682
   ]
  },
  "max_100m": {
   "gradient_pct": 17.28632071522472,
   "start_distance_m": 407.0,
   "end_distance_m": 507.0,
   "midpoint_distance_m": 457.0,
   "start_elevation_m": 174.72804002092246,
   "end_elevation_m": 192.01436073614718,
   "start_xy": [
    409930.0394763537,
    415572.1691744192
   ],
   "end_xy": [
    409912.8844899447,
    415667.73271446826
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.2528116149911739,
   "start_distance_m": 2.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 130.78911112891177,
   "end_elevation_m": 130.85175170966133,
   "start_xy": [
    409915.87594028644,
    415263.3489784879
   ],
   "end_xy": [
    409920.34716657083,
    415265.43683530873
   ]
  },
  "min_10m": {
   "gradient_pct": 2.6471334947774494,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 130.74066915136817,
   "end_elevation_m": 131.0053825008459,
   "start_xy": [
    409913.994,
    415262.672
   ],
   "end_xy": [
    409922.5252084506,
    415267.4998749388
   ]
  },
  "min_20m": {
   "gradient_pct": 4.003935969358707,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 130.74066915136817,
   "end_elevation_m": 131.5414563452399,
   "start_xy": [
    409913.994,
    415262.672
   ],
   "end_xy": [
    409929.78518157324,
    415274.37684950524
   ]
  },
  "min_25m": {
   "gradient_pct": 4.890120184021612,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 130.74066915136817,
   "end_elevation_m": 131.96319919737357,
   "start_xy": [
    409913.994,
    415262.672
   ],
   "end_xy": [
    409933.41541343776,
    415277.8150777482
   ]
  },
  "min_50m": {
   "gradient_pct": 6.363107053144802,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 130.74066915136817,
   "end_elevation_m": 133.92222267794057,
   "start_xy": [
    409913.994,
    415262.672
   ],
   "end_xy": [
    409951.565096747,
    415295.0077776335
   ]
  },
  "min_100m": {
   "gradient_pct": 6.877382375189853,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 130.74066915136817,
   "end_elevation_m": 137.61805152655802,
   "start_xy": [
    409913.994,
    415262.672
   ],
   "end_xy": [
    409987.41499335197,
    415329.8608426811
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.793762366036788,
   "start_distance_m": 418.0,
   "end_distance_m": 420.0,
   "midpoint_distance_m": 419.0,
   "start_elevation_m": 177.0346660877491,
   "end_elevation_m": 177.55054133506982,
   "start_xy": [
    409925.944371155,
    415582.3651642019
   ],
   "end_xy": [
    409925.255509243,
    415584.2427872698
   ]
  },
  "max_3m": {
   "gradient_pct": 25.418577271451188,
   "start_distance_m": 418.0,
   "end_distance_m": 421.0,
   "midpoint_distance_m": 419.5,
   "start_elevation_m": 177.0346660877491,
   "end_elevation_m": 177.79722340589262,
   "start_xy": [
    409925.944371155,
    415582.3651642019
   ],
   "end_xy": [
    409924.9115190466,
    415585.18176050944
   ]
  }
 },
 "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": 0.008,
   "obstruction_max_height_m": 6.63,
   "flagged_windows_m": []
  },
  "structure_suppression": {
   "masked_fraction": 0.012,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    510.0,
    515.0
   ]
  ],
  "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/SE0515.tif",
   "data/cache/england/bulk_dtm_1m/SE1015.tif"
  ],
  "calculated_at": "2026-08-19T18:48:26+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": [
   "SE0515.tif",
   "SE1015.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.1% over 200 m (Terrain 50), gain 22.2 m over 153 m way. EXTENDED by graph walk: +3 segment(s) at base, +7 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."
 },
 "area": {
  "place": "Lower Wellhouse",
  "county": ""
 }
}