{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.9969, -3.3453)",
 "slug": "discovered-lane-50-9969-3-3453",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 52.98201889318861,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 138.0,
   "end_distance_m": 140.0,
   "start_elevation_m": 124.27082978172768,
   "end_elevation_m": 125.33047015959146,
   "min_gradient_pct": -27.577132605816956
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 48.96356382118512,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 145.0,
   "end_distance_m": 148.0,
   "start_elevation_m": 125.65562983651078,
   "end_elevation_m": 127.12453675114634,
   "min_gradient_pct": -24.566856160134876
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 42.828528760774134,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 144.0,
   "end_distance_m": 149.0,
   "start_elevation_m": 125.41512454576583,
   "end_elevation_m": 127.55655098380454,
   "min_gradient_pct": -21.151063587686565
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.537069694186528,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 138.0,
   "end_distance_m": 148.0,
   "start_elevation_m": 124.27082978172768,
   "end_elevation_m": 127.12453675114634,
   "min_gradient_pct": -10.301073545997497
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.50612045625759,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 129.0,
   "end_distance_m": 149.0,
   "start_elevation_m": 122.85532689255302,
   "end_elevation_m": 127.55655098380454,
   "min_gradient_pct": -6.5185930525456826
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.52052832956747,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 66.0,
   "end_distance_m": 91.0,
   "start_elevation_m": 110.49849424454771,
   "end_elevation_m": 116.12862632693958,
   "min_gradient_pct": -1.5985700496045183
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.723728618244596,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 58.0,
   "end_distance_m": 108.0,
   "start_elevation_m": 109.155762937844,
   "end_elevation_m": 119.5176272469663,
   "min_gradient_pct": 1.2083550902509046
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.58624611589339,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 49.0,
   "end_distance_m": 149.0,
   "start_elevation_m": 107.97030486791115,
   "end_elevation_m": 127.55655098380454,
   "min_gradient_pct": 5.43202822601711
  }
 ],
 "shape": {
  "ascent_concentration": 0.398,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 112.0,
  "shape_class": "sustained"
 },
 "length_m": 572.4402267403754,
 "start_elevation_m": 107.46676495410297,
 "end_elevation_m": 160.71570905029344,
 "endpoint_gain_m": 53.24894409619047,
 "overall_gradient_pct": 9.302096814440157,
 "accumulated_ascent_m": 60.08013563159709,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 42.828528760774134,
   "start_distance_m": 144.0,
   "end_distance_m": 149.0,
   "midpoint_distance_m": 146.5,
   "start_elevation_m": 125.41512454576583,
   "end_elevation_m": 127.55655098380454,
   "start_xy": [
    305814.5200454703,
    122867.71861073916
   ],
   "end_xy": [
    305819.30934856477,
    122869.15477781475
   ]
  },
  "max_10m": {
   "gradient_pct": 28.537069694186528,
   "start_distance_m": 138.0,
   "end_distance_m": 148.0,
   "midpoint_distance_m": 143.0,
   "start_elevation_m": 124.27082978172768,
   "end_elevation_m": 127.12453675114634,
   "start_xy": [
    305808.7728817569,
    122865.99521024844
   ],
   "end_xy": [
    305818.3514879459,
    122868.86754439963
   ]
  },
  "max_20m": {
   "gradient_pct": 23.50612045625759,
   "start_distance_m": 129.0,
   "end_distance_m": 149.0,
   "midpoint_distance_m": 139.0,
   "start_elevation_m": 122.85532689255302,
   "end_elevation_m": 127.55655098380454,
   "start_xy": [
    305800.10543663974,
    122863.58027197911
   ],
   "end_xy": [
    305819.30934856477,
    122869.15477781475
   ]
  },
  "max_25m": {
   "gradient_pct": 22.52052832956747,
   "start_distance_m": 66.0,
   "end_distance_m": 91.0,
   "midpoint_distance_m": 78.5,
   "start_elevation_m": 110.49849424454771,
   "end_elevation_m": 116.12862632693958,
   "start_xy": [
    305740.976718615,
    122843.12039070374
   ],
   "end_xy": [
    305763.4104937885,
    122853.83700576381
   ]
  },
  "max_50m": {
   "gradient_pct": 20.723728618244596,
   "start_distance_m": 58.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 83.0,
   "start_elevation_m": 109.155762937844,
   "end_elevation_m": 119.5176272469663,
   "start_xy": [
    305734.39147087064,
    122838.57786804055
   ],
   "end_xy": [
    305779.7292740502,
    122858.49972101235
   ]
  },
  "max_100m": {
   "gradient_pct": 19.58624611589339,
   "start_distance_m": 49.0,
   "end_distance_m": 149.0,
   "midpoint_distance_m": 99.0,
   "start_elevation_m": 107.97030486791115,
   "end_elevation_m": 127.55655098380454,
   "start_xy": [
    305727.42169019877,
    122832.88823385019
   ],
   "end_xy": [
    305819.30934856477,
    122869.15477781475
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -21.151063587686565,
   "start_distance_m": 15.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 17.5,
   "start_elevation_m": 107.22059952297816,
   "end_elevation_m": 106.16304634359383,
   "start_xy": [
    305698.2531080874,
    122817.54191367427
   ],
   "end_xy": [
    305703.16440864874,
    122818.47953129162
   ]
  },
  "min_10m": {
   "gradient_pct": -10.301073545997497,
   "start_distance_m": 11.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 16.0,
   "start_elevation_m": 107.1622939299331,
   "end_elevation_m": 106.13218657533335,
   "start_xy": [
    305694.3053879971,
    122816.90660529914
   ],
   "end_xy": [
    305704.146668761,
    122818.6670548151
   ]
  },
  "min_20m": {
   "gradient_pct": -6.5185930525456826,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 107.46676495410297,
   "end_elevation_m": 106.16304634359383,
   "start_xy": [
    305683.404,
    122815.437
   ],
   "end_xy": [
    305703.16440864874,
    122818.47953129162
   ]
  },
  "min_25m": {
   "gradient_pct": -1.5985700496045183,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 107.46676495410297,
   "end_elevation_m": 107.06712244170184,
   "start_xy": [
    305683.404,
    122815.437
   ],
   "end_xy": [
    305708.07570921,
    122819.41714890898
   ]
  },
  "min_50m": {
   "gradient_pct": 1.2083550902509046,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 107.46676495410297,
   "end_elevation_m": 108.07094249922842,
   "start_xy": [
    305683.404,
    122815.437
   ],
   "end_xy": [
    305728.191474584,
    122833.52653785322
   ]
  },
  "min_100m": {
   "gradient_pct": 5.43202822601711,
   "start_distance_m": 209.0,
   "end_distance_m": 309.0,
   "midpoint_distance_m": 259.0,
   "start_elevation_m": 131.73643402446476,
   "end_elevation_m": 137.16846225048187,
   "start_xy": [
    305865.3270478595,
    122904.12770765736
   ],
   "end_xy": [
    305953.0094390163,
    122947.91938693513
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 52.98201889318861,
   "start_distance_m": 138.0,
   "end_distance_m": 140.0,
   "midpoint_distance_m": 139.0,
   "start_elevation_m": 124.27082978172768,
   "end_elevation_m": 125.33047015959146,
   "start_xy": [
    305808.7728817569,
    122865.99521024844
   ],
   "end_xy": [
    305810.68860299466,
    122866.56967707869
   ]
  },
  "max_3m": {
   "gradient_pct": 48.96356382118512,
   "start_distance_m": 145.0,
   "end_distance_m": 148.0,
   "midpoint_distance_m": 146.5,
   "start_elevation_m": 125.65562983651078,
   "end_elevation_m": 127.12453675114634,
   "start_xy": [
    305815.47790608916,
    122868.00584415428
   ],
   "end_xy": [
    305818.3514879459,
    122868.86754439963
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.061,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.159,
   "obstruction_max_height_m": 13.51,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    50
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    34.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "extent": []
 },
 "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/ST0520.tif"
  ],
  "calculated_at": "2026-09-05T02:08:22+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106792346/hunt-gb/regions/region-08.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": [
   "ST0520.tif"
  ],
  "climb_origin": "discovered",
  "mask_basin_extension_m": 8.0,
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Stawley",
  "county": "Somerset"
 }
}