{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (53.1731, -1.8474)",
 "slug": "discovered-lane-53-1731-1-8474",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.354656989109685,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 621.0,
   "end_distance_m": 623.0,
   "start_elevation_m": 336.4942435038952,
   "end_elevation_m": 337.10133664367737,
   "min_gradient_pct": -6.296691190877368
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.026237155966328,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 167.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 271.9460734965405,
   "end_elevation_m": 272.8168606112195,
   "min_gradient_pct": -5.771184271461986
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.24913672025309,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 165.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 271.45440377520686,
   "end_elevation_m": 272.8168606112195,
   "min_gradient_pct": -4.484344418083879
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.265783250468075,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 160.0,
   "end_distance_m": 170.0,
   "start_elevation_m": 270.1902822861727,
   "end_elevation_m": 272.8168606112195,
   "min_gradient_pct": -3.815010734294333
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.12724810962709,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 160.0,
   "end_distance_m": 180.0,
   "start_elevation_m": 270.1902822861727,
   "end_elevation_m": 275.2157319080981,
   "min_gradient_pct": -0.5592765443302028
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.748750865831653,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 157.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 269.48229967532853,
   "end_elevation_m": 275.66948739178645,
   "min_gradient_pct": 0.9072351101466438
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.82679780169758,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 130.0,
   "end_distance_m": 180.0,
   "start_elevation_m": 263.80233300724933,
   "end_elevation_m": 275.2157319080981,
   "min_gradient_pct": 5.087356753484755
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.981711481870605,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 108.0,
   "end_distance_m": 208.0,
   "start_elevation_m": 260.5866989004111,
   "end_elevation_m": 279.5684103822817,
   "min_gradient_pct": 6.720980623468336
  }
 ],
 "shape": {
  "ascent_concentration": 0.319,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 307.0,
  "shape_class": "sustained"
 },
 "length_m": 641.4287992449869,
 "start_elevation_m": 250.12981748672584,
 "end_elevation_m": 338.3975145891133,
 "endpoint_gain_m": 88.26769710238747,
 "overall_gradient_pct": 13.761106019294054,
 "accumulated_ascent_m": 88.73938879836035,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.24913672025309,
   "start_distance_m": 165.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 167.5,
   "start_elevation_m": 271.45440377520686,
   "end_elevation_m": 272.8168606112195,
   "start_xy": [
    410490.5370744625,
    364199.1591021167
   ],
   "end_xy": [
    410487.296251624,
    364195.35160066176
   ]
  },
  "max_10m": {
   "gradient_pct": 26.265783250468075,
   "start_distance_m": 160.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 165.0,
   "start_elevation_m": 270.1902822861727,
   "end_elevation_m": 272.8168606112195,
   "start_xy": [
    410493.777897301,
    364202.96660357167
   ],
   "end_xy": [
    410487.296251624,
    364195.35160066176
   ]
  },
  "max_20m": {
   "gradient_pct": 25.12724810962709,
   "start_distance_m": 160.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 170.0,
   "start_elevation_m": 270.1902822861727,
   "end_elevation_m": 275.2157319080981,
   "start_xy": [
    410493.777897301,
    364202.96660357167
   ],
   "end_xy": [
    410482.66090949014,
    364186.49693977047
   ]
  },
  "max_25m": {
   "gradient_pct": 24.748750865831653,
   "start_distance_m": 157.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 169.5,
   "start_elevation_m": 269.48229967532853,
   "end_elevation_m": 275.66948739178645,
   "start_xy": [
    410495.7223910041,
    364205.2511044447
   ],
   "end_xy": [
    410481.7419484362,
    364184.7205640834
   ]
  },
  "max_50m": {
   "gradient_pct": 22.82679780169758,
   "start_distance_m": 130.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 155.0,
   "start_elevation_m": 263.80233300724933,
   "end_elevation_m": 275.2157319080981,
   "start_xy": [
    410513.22283433203,
    364225.8116123014
   ],
   "end_xy": [
    410482.66090949014,
    364186.49693977047
   ]
  },
  "max_100m": {
   "gradient_pct": 18.981711481870605,
   "start_distance_m": 108.0,
   "end_distance_m": 208.0,
   "midpoint_distance_m": 158.0,
   "start_elevation_m": 260.5866989004111,
   "end_elevation_m": 279.5684103822817,
   "start_xy": [
    410527.48245482147,
    364242.56461870315
   ],
   "end_xy": [
    410483.08209396945,
    364161.4338086136
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.484344418083879,
   "start_distance_m": 7.0,
   "end_distance_m": 12.0,
   "midpoint_distance_m": 9.5,
   "start_elevation_m": 249.89109176919294,
   "end_elevation_m": 249.66687454828875,
   "start_xy": [
    410593.15546973265,
    364319.29428060906
   ],
   "end_xy": [
    410589.8215195417,
    364315.56805247266
   ]
  },
  "min_10m": {
   "gradient_pct": -3.815010734294333,
   "start_distance_m": 1.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 6.0,
   "start_elevation_m": 250.0815261153461,
   "end_elevation_m": 249.70002504191666,
   "start_xy": [
    410597.1562099618,
    364323.7657543727
   ],
   "end_xy": [
    410590.48830957996,
    364316.31329809997
   ]
  },
  "min_20m": {
   "gradient_pct": -0.5592765443302028,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 250.12981748672584,
   "end_elevation_m": 250.0179621778598,
   "start_xy": [
    410597.823,
    364324.511
   ],
   "end_xy": [
    410584.5209367791,
    364309.57664431026
   ]
  },
  "min_25m": {
   "gradient_pct": 0.9072351101466438,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 250.12981748672584,
   "end_elevation_m": 250.3566262642625,
   "start_xy": [
    410597.823,
    364324.511
   ],
   "end_xy": [
    410581.2801139406,
    364305.7691428553
   ]
  },
  "min_50m": {
   "gradient_pct": 5.087356753484755,
   "start_distance_m": 274.0,
   "end_distance_m": 324.0,
   "midpoint_distance_m": 299.0,
   "start_elevation_m": 285.0346379936213,
   "end_elevation_m": 287.57831637036367,
   "start_xy": [
    410519.7106296744,
    364106.7470634906
   ],
   "end_xy": [
    410552.3816319872,
    364068.91187743103
   ]
  },
  "min_100m": {
   "gradient_pct": 6.720980623468336,
   "start_distance_m": 214.0,
   "end_distance_m": 314.0,
   "midpoint_distance_m": 264.0,
   "start_elevation_m": 280.0902769229607,
   "end_elevation_m": 286.81125754642903,
   "start_xy": [
    410486.5871659155,
    364156.5640580396
   ],
   "end_xy": [
    410545.7779904451,
    364076.42133269645
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.354656989109685,
   "start_distance_m": 621.0,
   "end_distance_m": 623.0,
   "midpoint_distance_m": 622.0,
   "start_elevation_m": 336.4942435038952,
   "end_elevation_m": 337.10133664367737,
   "start_xy": [
    410305.8839932249,
    364026.213143267
   ],
   "end_xy": [
    410304.8016982655,
    364024.53128785687
   ]
  },
  "max_3m": {
   "gradient_pct": 29.026237155966328,
   "start_distance_m": 167.0,
   "end_distance_m": 170.0,
   "midpoint_distance_m": 168.5,
   "start_elevation_m": 271.9460734965405,
   "end_elevation_m": 272.8168606112195,
   "start_xy": [
    410489.2407453271,
    364197.63610153476
   ],
   "end_xy": [
    410487.296251624,
    364195.35160066176
   ]
  }
 },
 "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": 0.0,
   "obstruction_max_height_m": 1.46,
   "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/SK1060.tif"
  ],
  "calculated_at": "2026-09-05T01:44:38+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106794610/hunt-gb/regions/region-01.osm.pbf",
  "osm_snapshot": "",
  "run_id": "hunt-england-260905",
  "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": [
   "SK1060.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Crowdicote",
  "county": "Derbyshire"
 }
}