{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.2575, -4.8074)",
 "slug": "discovered-lane-50-2575-4-8074",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.23570922574548,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 351.0,
   "end_distance_m": 353.0,
   "start_elevation_m": 56.3824687715435,
   "end_elevation_m": 57.06718295605841,
   "min_gradient_pct": -37.014075295612336
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.57416005626976,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 350.0,
   "end_distance_m": 353.0,
   "start_elevation_m": 56.14995815437032,
   "end_elevation_m": 57.06718295605841,
   "min_gradient_pct": -28.320757365688404
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.7390016918512,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 272.0,
   "end_distance_m": 277.0,
   "start_elevation_m": 37.9736507889702,
   "end_elevation_m": 39.41060087356276,
   "min_gradient_pct": -25.245702769956395
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.43238971346642,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 266.0,
   "end_distance_m": 276.0,
   "start_elevation_m": 36.37726335596956,
   "end_elevation_m": 39.1205023273162,
   "min_gradient_pct": -21.99758555748984
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.327462359596687,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 265.0,
   "end_distance_m": 285.0,
   "start_elevation_m": 36.12198180381559,
   "end_elevation_m": 41.38747427573493,
   "min_gradient_pct": -17.34286353048179
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 26.079482296915074,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 272.0,
   "end_distance_m": 297.0,
   "start_elevation_m": 37.9736507889702,
   "end_elevation_m": 44.493521363198965,
   "min_gradient_pct": -16.678437515149106
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 25.640510435431068,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 265.0,
   "end_distance_m": 315.0,
   "start_elevation_m": 36.12198180381559,
   "end_elevation_m": 48.94223702153113,
   "min_gradient_pct": -11.207429515918653
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 23.49712793884761,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 262.0,
   "end_distance_m": 362.0,
   "start_elevation_m": 35.51048391687788,
   "end_elevation_m": 59.007611855725486,
   "min_gradient_pct": -2.8994791784682405
  }
 ],
 "shape": {
  "ascent_concentration": 0.511,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 187.0,
  "shape_class": "stepped"
 },
 "length_m": 798.3524718531081,
 "start_elevation_m": 13.223893723527448,
 "end_elevation_m": 83.00273147583007,
 "endpoint_gain_m": 69.77883775230262,
 "overall_gradient_pct": 8.740354694504095,
 "accumulated_ascent_m": 77.69895504645852,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.7390016918512,
   "start_distance_m": 272.0,
   "end_distance_m": 277.0,
   "midpoint_distance_m": 274.5,
   "start_elevation_m": 37.9736507889702,
   "end_elevation_m": 39.41060087356276,
   "start_xy": [
    200707.33378823553,
    43525.286822471666
   ],
   "end_xy": [
    200710.29333357958,
    43521.25679873023
   ]
  },
  "max_10m": {
   "gradient_pct": 27.43238971346642,
   "start_distance_m": 266.0,
   "end_distance_m": 276.0,
   "midpoint_distance_m": 271.0,
   "start_elevation_m": 36.37726335596956,
   "end_elevation_m": 39.1205023273162,
   "start_xy": [
    200703.7823338227,
    43530.12285096139
   ],
   "end_xy": [
    200709.70142451077,
    43522.06280347852
   ]
  },
  "max_20m": {
   "gradient_pct": 26.327462359596687,
   "start_distance_m": 265.0,
   "end_distance_m": 285.0,
   "midpoint_distance_m": 275.0,
   "start_elevation_m": 36.12198180381559,
   "end_elevation_m": 41.38747427573493,
   "start_xy": [
    200703.19042475388,
    43530.92885570967
   ],
   "end_xy": [
    200715.02860613007,
    43514.80876074394
   ]
  },
  "max_25m": {
   "gradient_pct": 26.079482296915074,
   "start_distance_m": 272.0,
   "end_distance_m": 297.0,
   "midpoint_distance_m": 284.5,
   "start_elevation_m": 37.9736507889702,
   "end_elevation_m": 44.493521363198965,
   "start_xy": [
    200707.33378823553,
    43525.286822471666
   ],
   "end_xy": [
    200722.13151495578,
    43505.136703764496
   ]
  },
  "max_50m": {
   "gradient_pct": 25.640510435431068,
   "start_distance_m": 265.0,
   "end_distance_m": 315.0,
   "midpoint_distance_m": 290.0,
   "start_elevation_m": 36.12198180381559,
   "end_elevation_m": 48.94223702153113,
   "start_xy": [
    200703.19042475388,
    43530.92885570967
   ],
   "end_xy": [
    200732.78587819435,
    43490.62861829533
   ]
  },
  "max_100m": {
   "gradient_pct": 23.49712793884761,
   "start_distance_m": 262.0,
   "end_distance_m": 362.0,
   "midpoint_distance_m": 312.0,
   "start_elevation_m": 35.51048391687788,
   "end_elevation_m": 59.007611855725486,
   "start_xy": [
    200701.41469754744,
    43533.34686995454
   ],
   "end_xy": [
    200763.4924540315,
    43455.416597884105
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -25.245702769956395,
   "start_distance_m": 6.0,
   "end_distance_m": 11.0,
   "midpoint_distance_m": 8.5,
   "start_elevation_m": 12.774710031917945,
   "end_elevation_m": 11.512424893420125,
   "start_xy": [
    200481.83322675698,
    43591.690029042766
   ],
   "end_xy": [
    200486.33475157976,
    43593.851263896766
   ]
  },
  "min_10m": {
   "gradient_pct": -21.99758555748984,
   "start_distance_m": 6.0,
   "end_distance_m": 16.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 12.774710031917945,
   "end_elevation_m": 10.57495147616896,
   "start_xy": [
    200481.83322675698,
    43591.690029042766
   ],
   "end_xy": [
    200490.86532810295,
    43595.96641787875
   ]
  },
  "min_20m": {
   "gradient_pct": -17.34286353048179,
   "start_distance_m": 5.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 15.0,
   "start_elevation_m": 12.88405124697635,
   "end_elevation_m": 9.415478540879992,
   "start_xy": [
    200481.0608556308,
    43591.05485753564
   ],
   "end_xy": [
    200499.0203658447,
    43599.773695046315
   ]
  },
  "min_25m": {
   "gradient_pct": -16.678437515149106,
   "start_distance_m": 6.0,
   "end_distance_m": 31.0,
   "midpoint_distance_m": 18.5,
   "start_elevation_m": 12.774710031917945,
   "end_elevation_m": 8.605100653130668,
   "start_xy": [
    200481.83322675698,
    43591.690029042766
   ],
   "end_xy": [
    200504.6734656618,
    43601.65661539082
   ]
  },
  "min_50m": {
   "gradient_pct": -11.207429515918653,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 13.223893723527448,
   "end_elevation_m": 7.620178965568122,
   "start_xy": [
    200477.199,
    43587.879
   ],
   "end_xy": [
    200519.8262190719,
    43594.16281438782
   ]
  },
  "min_100m": {
   "gradient_pct": -2.8994791784682405,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 13.223893723527448,
   "end_elevation_m": 10.324414545059208,
   "start_xy": [
    200477.199,
    43587.879
   ],
   "end_xy": [
    200557.1993170222,
    43563.96981477607
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.23570922574548,
   "start_distance_m": 351.0,
   "end_distance_m": 353.0,
   "midpoint_distance_m": 352.0,
   "start_elevation_m": 56.3824687715435,
   "end_elevation_m": 57.06718295605841,
   "start_xy": [
    200755.1602162653,
    43462.59808894149
   ],
   "end_xy": [
    200756.67516858643,
    43461.2923632947
   ]
  },
  "max_3m": {
   "gradient_pct": 30.57416005626976,
   "start_distance_m": 350.0,
   "end_distance_m": 353.0,
   "midpoint_distance_m": 351.5,
   "start_elevation_m": 56.14995815437032,
   "end_elevation_m": 57.06718295605841,
   "start_xy": [
    200754.40274010474,
    43463.250951764894
   ],
   "end_xy": [
    200756.67516858643,
    43461.2923632947
   ]
  }
 },
 "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": 0.024,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.051,
   "obstruction_max_height_m": 10.42,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    48.0,
    66.0
   ]
  ],
  "review": [],
  "extent": [
   "descends_at_start"
  ]
 },
 "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/SX0040.tif"
  ],
  "calculated_at": "2026-09-05T02:01:15+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-00.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": [
   "SX0040.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Portmellon",
  "county": "Cornwall"
 }
}