{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.4601, -3.7652)",
 "slug": "discovered-lane-50-4601-3-7652",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 45.787801257611704,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 264.0,
   "end_distance_m": 266.0,
   "start_elevation_m": 65.59869045661793,
   "end_elevation_m": 66.51444648177016,
   "min_gradient_pct": -27.901803960379468,
   "suppressed_max_gradient_pct": 64.38605917340112,
   "suppressed_location_m": [
    52.0,
    54.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 42.56905003295467,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 388.0,
   "end_distance_m": 391.0,
   "start_elevation_m": 82.3622779786535,
   "end_elevation_m": 83.63934947964214,
   "min_gradient_pct": -20.901719526751823,
   "suppressed_max_gradient_pct": 56.948010067461986,
   "suppressed_location_m": [
    51.0,
    54.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 39.83082200151614,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 388.0,
   "end_distance_m": 393.0,
   "start_elevation_m": 82.3622779786535,
   "end_elevation_m": 84.3538190787293,
   "min_gradient_pct": -15.291778301430128,
   "suppressed_max_gradient_pct": 47.88144982060203,
   "suppressed_location_m": [
    23.0,
    28.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 31.460832777041077,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 387.0,
   "end_distance_m": 397.0,
   "start_elevation_m": 82.06977353243225,
   "end_elevation_m": 85.21585681013636,
   "min_gradient_pct": -9.607089210150122,
   "suppressed_max_gradient_pct": 40.96572878936932,
   "suppressed_location_m": [
    20.0,
    30.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.873875861272325,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 383.0,
   "end_distance_m": 403.0,
   "start_elevation_m": 81.56613303103052,
   "end_elevation_m": 86.34090820328498,
   "min_gradient_pct": -4.622841858493025,
   "suppressed_max_gradient_pct": 33.93546123558256,
   "suppressed_location_m": [
    37.0,
    57.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.135044740577882,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 378.0,
   "end_distance_m": 403.0,
   "start_elevation_m": 80.80714701814051,
   "end_elevation_m": 86.34090820328498,
   "min_gradient_pct": -2.897912349754506,
   "suppressed_max_gradient_pct": 30.038676720374923,
   "suppressed_location_m": [
    37.0,
    62.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.95792573941918,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 370.0,
   "end_distance_m": 420.0,
   "start_elevation_m": 79.66392832776151,
   "end_elevation_m": 88.6428911974711,
   "min_gradient_pct": 2.2224594579976724,
   "suppressed_max_gradient_pct": 25.634287053330482,
   "suppressed_location_m": [
    12.0,
    62.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.497642301937404,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 320.0,
   "end_distance_m": 420.0,
   "start_elevation_m": 73.1452488955337,
   "end_elevation_m": 88.6428911974711,
   "min_gradient_pct": 6.178520327992608,
   "suppressed_max_gradient_pct": 17.437702039711596,
   "suppressed_location_m": [
    0.0,
    100.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.323,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 65.0,
  "shape_class": "sustained"
 },
 "length_m": 434.99999999997874,
 "start_elevation_m": 32.802795908416115,
 "end_elevation_m": 88.2993528202642,
 "endpoint_gain_m": 55.49655691184809,
 "overall_gradient_pct": 12.757829175138117,
 "accumulated_ascent_m": 61.711666312403125,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 39.83082200151614,
   "start_distance_m": 388.0,
   "end_distance_m": 393.0,
   "midpoint_distance_m": 390.5,
   "start_elevation_m": 82.3622779786535,
   "end_elevation_m": 84.3538190787293,
   "start_xy": [
    274950.8410859497,
    63629.63516536282
   ],
   "end_xy": [
    274945.8932717031,
    63630.355421197426
   ]
  },
  "max_10m": {
   "gradient_pct": 31.460832777041077,
   "start_distance_m": 387.0,
   "end_distance_m": 397.0,
   "midpoint_distance_m": 392.0,
   "start_elevation_m": 82.06977353243225,
   "end_elevation_m": 85.21585681013636,
   "start_xy": [
    274951.83067553124,
    63629.49124719546
   ],
   "end_xy": [
    274942.55504483776,
    63632.36743998679
   ]
  },
  "max_20m": {
   "gradient_pct": 23.873875861272325,
   "start_distance_m": 383.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 393.0,
   "start_elevation_m": 81.56613303103052,
   "end_elevation_m": 86.34090820328498,
   "start_xy": [
    274955.36340333207,
    63630.9309838487
   ],
   "end_xy": [
    274938.1530036026,
    63636.444451703326
   ]
  },
  "max_25m": {
   "gradient_pct": 22.135044740577882,
   "start_distance_m": 378.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 390.5,
   "start_elevation_m": 80.80714701814051,
   "end_elevation_m": 86.34090820328498,
   "start_xy": [
    274959.3982872568,
    63633.883898985754
   ],
   "end_xy": [
    274938.1530036026,
    63636.444451703326
   ]
  },
  "max_50m": {
   "gradient_pct": 17.95792573941918,
   "start_distance_m": 370.0,
   "end_distance_m": 420.0,
   "midpoint_distance_m": 395.0,
   "start_elevation_m": 79.66392832776151,
   "end_elevation_m": 88.6428911974711,
   "start_xy": [
    274965.85401209566,
    63638.60868543809
   ],
   "end_xy": [
    274925.6800475419,
    63647.99543747819
   ]
  },
  "max_100m": {
   "gradient_pct": 15.497642301937404,
   "start_distance_m": 320.0,
   "end_distance_m": 420.0,
   "midpoint_distance_m": 370.0,
   "start_elevation_m": 73.1452488955337,
   "end_elevation_m": 88.6428911974711,
   "start_xy": [
    275006.09225968935,
    63668.28663984042
   ],
   "end_xy": [
    274925.6800475419,
    63647.99543747819
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -15.291778301430128,
   "start_distance_m": 89.0,
   "end_distance_m": 94.0,
   "midpoint_distance_m": 91.5,
   "start_elevation_m": 50.774091958320334,
   "end_elevation_m": 50.00950304324883,
   "start_xy": [
    275179.627028122,
    63728.28734614409
   ],
   "end_xy": [
    275180.03298685304,
    63733.27083817874
   ]
  },
  "min_10m": {
   "gradient_pct": -9.607089210150122,
   "start_distance_m": 84.0,
   "end_distance_m": 94.0,
   "midpoint_distance_m": 89.0,
   "start_elevation_m": 50.97021196426384,
   "end_elevation_m": 50.00950304324883,
   "start_xy": [
    275179.22098853486,
    63723.30386060034
   ],
   "end_xy": [
    275180.03298685304,
    63733.27083817874
   ]
  },
  "min_20m": {
   "gradient_pct": -4.622841858493025,
   "start_distance_m": 99.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 109.0,
   "start_elevation_m": 50.45975473739889,
   "end_elevation_m": 49.535186365700284,
   "start_xy": [
    275180.44001993217,
    63738.254242346215
   ],
   "end_xy": [
    275185.3429987273,
    63757.60863515718
   ]
  },
  "min_25m": {
   "gradient_pct": -2.897912349754506,
   "start_distance_m": 85.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 97.5,
   "start_elevation_m": 51.11347905833045,
   "end_elevation_m": 50.38900097089182,
   "start_xy": [
    275179.3019655986,
    63724.3005765654
   ],
   "end_xy": [
    275183.05401806626,
    63748.92406824239
   ]
  },
  "min_50m": {
   "gradient_pct": 2.2224594579976724,
   "start_distance_m": 81.0,
   "end_distance_m": 131.0,
   "midpoint_distance_m": 106.0,
   "start_elevation_m": 50.47843436900353,
   "end_elevation_m": 51.589664098002366,
   "start_xy": [
    275179.1839911296,
    63720.31807096324
   ],
   "end_xy": [
    275174.276868722,
    63752.988210397816
   ]
  },
  "min_100m": {
   "gradient_pct": 6.178520327992608,
   "start_distance_m": 82.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 132.0,
   "start_elevation_m": 50.664142825285936,
   "end_elevation_m": 56.842663153278544,
   "start_xy": [
    275179.06002776936,
    63721.31035045623
   ],
   "end_xy": [
    275127.4228651727,
    63732.846255595316
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 45.787801257611704,
   "start_distance_m": 264.0,
   "end_distance_m": 266.0,
   "midpoint_distance_m": 265.0,
   "start_elevation_m": 65.59869045661793,
   "end_elevation_m": 66.51444648177016,
   "start_xy": [
    275053.07392180304,
    63698.3504485098
   ],
   "end_xy": [
    275051.28586816066,
    63697.45442162859
   ]
  },
  "max_3m": {
   "gradient_pct": 42.56905003295467,
   "start_distance_m": 388.0,
   "end_distance_m": 391.0,
   "midpoint_distance_m": 389.5,
   "start_elevation_m": 82.3622779786535,
   "end_elevation_m": 83.63934947964214,
   "start_xy": [
    274950.8410859497,
    63629.63516536282
   ],
   "end_xy": [
    274947.8720670497,
    63630.06519347304
   ]
  }
 },
 "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": 0.096,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.188,
   "windows_resited": [
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 2,
   "windows_masked": [
    {
     "window_m": 20.0,
     "start_m": 65.0,
     "end_m": 85.0,
     "raw_pct": 24.6,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 71.0,
     "end_m": 81.0,
     "raw_pct": 32.95,
     "reason": "hump+short-step"
    },
    {
     "window_m": 10.0,
     "start_m": 37.0,
     "end_m": 47.0,
     "raw_pct": 32.56,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.241,
   "obstruction_max_height_m": 11.35,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    56.0
   ],
   [
    63.0,
    87.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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/dtm_1m/E274000_N62000_2000m.tif"
  ],
  "calculated_at": "2026-09-15T03:50:30+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-27.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "retro-260914",
  "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": [
   "E274000_N62000_2000m.tif"
  ],
  "route_cut_m": 435.0,
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "structure_mask_ranges_m": [
   [
    0.0,
    15.0
   ]
  ],
  "mask_basin_extension_m": 14.0,
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Brownston",
  "county": "Devon"
 }
}