{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (53.6930, -2.4028)",
 "slug": "discovered-lane-53-6930-2-4028",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.58519857062697,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 407.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 327.6746045416249,
   "end_elevation_m": 328.5663085130374,
   "min_gradient_pct": -19.523213795989136
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.734963334600025,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 406.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 327.4342596129994,
   "end_elevation_m": 328.5663085130374,
   "min_gradient_pct": -12.704011829339379
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.958947695125744,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 404.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 327.06836112828114,
   "end_elevation_m": 328.5663085130374,
   "min_gradient_pct": -7.439447184233359
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.599095384435827,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 399.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 326.10639897459384,
   "end_elevation_m": 328.5663085130374,
   "min_gradient_pct": -1.814782469310785
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.17784705065418,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 389.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 324.3307391029066,
   "end_elevation_m": 328.5663085130374,
   "min_gradient_pct": -0.0117233036311859
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.51882928927671,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 384.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 323.43660119071825,
   "end_elevation_m": 328.5663085130374,
   "min_gradient_pct": 0.3963854889382219
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.98265337543546,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 359.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 319.0749818253197,
   "end_elevation_m": 328.5663085130374,
   "min_gradient_pct": 2.4306528753179464
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.712078779658157,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 309.0,
   "end_distance_m": 409.0,
   "start_elevation_m": 311.85422973337927,
   "end_elevation_m": 328.5663085130374,
   "min_gradient_pct": 3.9988182540200796
  }
 ],
 "shape": {
  "ascent_concentration": 0.417,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 123.0,
  "shape_class": "sustained"
 },
 "length_m": 557.7817237115659,
 "start_elevation_m": 286.9574723046801,
 "end_elevation_m": 335.52631371093696,
 "endpoint_gain_m": 48.568841406256865,
 "overall_gradient_pct": 8.70749960810338,
 "accumulated_ascent_m": 49.37598994148124,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.958947695125744,
   "start_distance_m": 404.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 406.5,
   "start_elevation_m": 327.06836112828114,
   "end_elevation_m": 328.5663085130374,
   "start_xy": [
    373486.042923512,
    422065.8012682746
   ],
   "end_xy": [
    373490.9093520399,
    422064.65328160964
   ]
  },
  "max_10m": {
   "gradient_pct": 24.599095384435827,
   "start_distance_m": 399.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 404.0,
   "start_elevation_m": 326.10639897459384,
   "end_elevation_m": 328.5663085130374,
   "start_xy": [
    373481.13936637423,
    422066.67616772576
   ],
   "end_xy": [
    373490.9093520399,
    422064.65328160964
   ]
  },
  "max_20m": {
   "gradient_pct": 21.17784705065418,
   "start_distance_m": 389.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 399.0,
   "start_elevation_m": 324.3307391029066,
   "end_elevation_m": 328.5663085130374,
   "start_xy": [
    373471.14681391785,
    422067.06203740113
   ],
   "end_xy": [
    373490.9093520399,
    422064.65328160964
   ]
  },
  "max_25m": {
   "gradient_pct": 20.51882928927671,
   "start_distance_m": 384.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 396.5,
   "start_elevation_m": 323.43660119071825,
   "end_elevation_m": 328.5663085130374,
   "start_xy": [
    373466.1505376897,
    422067.25497223885
   ],
   "end_xy": [
    373490.9093520399,
    422064.65328160964
   ]
  },
  "max_50m": {
   "gradient_pct": 18.98265337543546,
   "start_distance_m": 359.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 384.0,
   "start_elevation_m": 319.0749818253197,
   "end_elevation_m": 328.5663085130374,
   "start_xy": [
    373441.16915654874,
    422068.2196464274
   ],
   "end_xy": [
    373490.9093520399,
    422064.65328160964
   ]
  },
  "max_100m": {
   "gradient_pct": 16.712078779658157,
   "start_distance_m": 309.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 359.0,
   "start_elevation_m": 311.85422973337927,
   "end_elevation_m": 328.5663085130374,
   "start_xy": [
    373391.19105564366,
    422069.2706013045
   ],
   "end_xy": [
    373490.9093520399,
    422064.65328160964
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.439447184233359,
   "start_distance_m": 4.0,
   "end_distance_m": 9.0,
   "midpoint_distance_m": 6.5,
   "start_elevation_m": 287.4007904615687,
   "end_elevation_m": 287.02881810235704,
   "start_xy": [
    373145.28071970976,
    421919.7077114089
   ],
   "end_xy": [
    373150.2116193469,
    421920.53610067006
   ]
  },
  "min_10m": {
   "gradient_pct": -1.814782469310785,
   "start_distance_m": 409.0,
   "end_distance_m": 419.0,
   "midpoint_distance_m": 414.0,
   "start_elevation_m": 328.5663085130374,
   "end_elevation_m": 328.38483026610635,
   "start_xy": [
    373490.9093520399,
    422064.65328160964
   ],
   "end_xy": [
    373495.4630283785,
    422056.2175893724
   ]
  },
  "min_20m": {
   "gradient_pct": -0.0117233036311859,
   "start_distance_m": 4.0,
   "end_distance_m": 24.0,
   "midpoint_distance_m": 14.0,
   "start_elevation_m": 287.4007904615687,
   "end_elevation_m": 287.39844580084247,
   "start_xy": [
    373145.28071970976,
    421919.7077114089
   ],
   "end_xy": [
    373163.76306726533,
    421924.8693333977
   ]
  },
  "min_25m": {
   "gradient_pct": 0.3963854889382219,
   "start_distance_m": 3.0,
   "end_distance_m": 28.0,
   "midpoint_distance_m": 15.5,
   "start_elevation_m": 287.38634003716015,
   "end_elevation_m": 287.4854364093947,
   "start_xy": [
    373144.29453978234,
    421919.5420335567
   ],
   "end_xy": [
    373165.8686427473,
    421928.2702967744
   ]
  },
  "min_50m": {
   "gradient_pct": 2.4306528753179464,
   "start_distance_m": 3.0,
   "end_distance_m": 53.0,
   "midpoint_distance_m": 28.0,
   "start_elevation_m": 287.38634003716015,
   "end_elevation_m": 288.6016664748191,
   "start_xy": [
    373144.29453978234,
    421919.5420335567
   ],
   "end_xy": [
    373168.8675480835,
    421952.2732656628
   ]
  },
  "min_100m": {
   "gradient_pct": 3.9988182540200796,
   "start_distance_m": 409.0,
   "end_distance_m": 509.0,
   "midpoint_distance_m": 459.0,
   "start_elevation_m": 328.5663085130374,
   "end_elevation_m": 332.5651267670575,
   "start_xy": [
    373490.9093520399,
    422064.65328160964
   ],
   "end_xy": [
    373493.10186117847,
    421966.24856754014
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.58519857062697,
   "start_distance_m": 407.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 408.0,
   "start_elevation_m": 327.6746045416249,
   "end_elevation_m": 328.5663085130374,
   "start_xy": [
    373488.96278062876,
    422065.11247627565
   ],
   "end_xy": [
    373490.9093520399,
    422064.65328160964
   ]
  },
  "max_3m": {
   "gradient_pct": 37.734963334600025,
   "start_distance_m": 406.0,
   "end_distance_m": 409.0,
   "midpoint_distance_m": 407.5,
   "start_elevation_m": 327.4342596129994,
   "end_elevation_m": 328.5663085130374,
   "start_xy": [
    373487.98949492315,
    422065.3420736086
   ],
   "end_xy": [
    373490.9093520399,
    422064.65328160964
   ]
  }
 },
 "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": 0.38,
   "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/SD7020.tif"
  ],
  "calculated_at": "2026-09-05T02:02:53+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-13.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": [
   "SD7020.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Pickup Bank",
  "county": "Blackburn with Darwen"
 }
}