{
 "ocl_version": "0.1.0",
 "name": "Lane near Lanreath",
 "slug": "discovered-lane-50-3885-4-5878",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.448062431913456,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 373.0,
   "end_distance_m": 375.0,
   "start_elevation_m": 72.01194392281272,
   "end_elevation_m": 72.82090517145099,
   "min_gradient_pct": -25.191959951998655,
   "suppressed_max_gradient_pct": 48.313171471097505,
   "suppressed_location_m": [
    4.0,
    6.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.6404150042128,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 373.0,
   "end_distance_m": 376.0,
   "start_elevation_m": 72.01194392281272,
   "end_elevation_m": 73.0211563729391,
   "min_gradient_pct": -15.828979010815658,
   "suppressed_max_gradient_pct": 42.6892662956341,
   "suppressed_location_m": [
    3.0,
    6.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.628365657867164,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 373.0,
   "end_distance_m": 378.0,
   "start_elevation_m": 72.01194392281272,
   "end_elevation_m": 73.24336220570608,
   "min_gradient_pct": -9.682559784305909,
   "suppressed_max_gradient_pct": 32.25652275459666,
   "suppressed_location_m": [
    2.0,
    7.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 17.48549821026188,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 368.0,
   "end_distance_m": 378.0,
   "start_elevation_m": 71.49481238467989,
   "end_elevation_m": 73.24336220570608,
   "min_gradient_pct": -7.3436680734297966
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 16.9563259508638,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 356.0,
   "end_distance_m": 376.0,
   "start_elevation_m": 69.62989118276634,
   "end_elevation_m": 73.0211563729391,
   "min_gradient_pct": -6.046541391467031
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 16.414751345506318,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 351.0,
   "end_distance_m": 376.0,
   "start_elevation_m": 68.91746853656252,
   "end_elevation_m": 73.0211563729391,
   "min_gradient_pct": -5.427260511156987
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 14.111354067917633,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 328.0,
   "end_distance_m": 378.0,
   "start_elevation_m": 66.18768517174726,
   "end_elevation_m": 73.24336220570608,
   "min_gradient_pct": -4.139397030852024
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.279096429907668,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 276.0,
   "end_distance_m": 376.0,
   "start_elevation_m": 60.742059943031435,
   "end_elevation_m": 73.0211563729391,
   "min_gradient_pct": -3.6897054447054103
  }
 ],
 "shape": {
  "ascent_concentration": 0.437,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 144.0,
  "shape_class": "sustained"
 },
 "length_m": 1318.8099123539873,
 "start_elevation_m": 35.50475578003472,
 "end_elevation_m": 111.54438455334466,
 "endpoint_gain_m": 76.03962877330994,
 "overall_gradient_pct": 5.765776254864835,
 "accumulated_ascent_m": 83.2159379427462,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.628365657867164,
   "start_distance_m": 373.0,
   "end_distance_m": 378.0,
   "midpoint_distance_m": 375.5,
   "start_elevation_m": 72.01194392281272,
   "end_elevation_m": 73.24336220570608,
   "start_xy": [
    216055.8246133864,
    57513.744448055426
   ],
   "end_xy": [
    216051.49972573653,
    57516.25350102739
   ]
  },
  "max_10m": {
   "gradient_pct": 17.48549821026188,
   "start_distance_m": 368.0,
   "end_distance_m": 378.0,
   "midpoint_distance_m": 373.0,
   "start_elevation_m": 71.49481238467989,
   "end_elevation_m": 73.24336220570608,
   "start_xy": [
    216060.14950103624,
    57511.23539508346
   ],
   "end_xy": [
    216051.49972573653,
    57516.25350102739
   ]
  },
  "max_20m": {
   "gradient_pct": 16.9563259508638,
   "start_distance_m": 356.0,
   "end_distance_m": 376.0,
   "midpoint_distance_m": 366.0,
   "start_elevation_m": 69.62989118276634,
   "end_elevation_m": 73.0211563729391,
   "start_xy": [
    216070.5292313959,
    57505.21366795074
   ],
   "end_xy": [
    216053.22968079647,
    57515.2498798386
   ]
  },
  "max_25m": {
   "gradient_pct": 16.414751345506318,
   "start_distance_m": 351.0,
   "end_distance_m": 376.0,
   "midpoint_distance_m": 363.5,
   "start_elevation_m": 68.91746853656252,
   "end_elevation_m": 73.0211563729391,
   "start_xy": [
    216074.85411904575,
    57502.70461497877
   ],
   "end_xy": [
    216053.22968079647,
    57515.2498798386
   ]
  },
  "max_50m": {
   "gradient_pct": 14.111354067917633,
   "start_distance_m": 328.0,
   "end_distance_m": 378.0,
   "midpoint_distance_m": 353.0,
   "start_elevation_m": 66.18768517174726,
   "end_elevation_m": 73.24336220570608,
   "start_xy": [
    216095.98162344005,
    57494.39404554455
   ],
   "end_xy": [
    216051.49972573653,
    57516.25350102739
   ]
  },
  "max_100m": {
   "gradient_pct": 12.279096429907668,
   "start_distance_m": 276.0,
   "end_distance_m": 376.0,
   "midpoint_distance_m": 326.0,
   "start_elevation_m": 60.742059943031435,
   "end_elevation_m": 73.0211563729391,
   "start_xy": [
    216147.50271398714,
    57491.45232026296
   ],
   "end_xy": [
    216053.22968079647,
    57515.2498798386
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.682559784305909,
   "start_distance_m": 657.0,
   "end_distance_m": 662.0,
   "midpoint_distance_m": 659.5,
   "start_elevation_m": 82.63275376078616,
   "end_elevation_m": 82.14862577157086,
   "start_xy": [
    215821.73213900274,
    57670.545049048706
   ],
   "end_xy": [
    215816.94169690678,
    57671.97741231457
   ]
  },
  "min_10m": {
   "gradient_pct": -7.3436680734297966,
   "start_distance_m": 707.0,
   "end_distance_m": 717.0,
   "midpoint_distance_m": 712.0,
   "start_elevation_m": 80.60949525481169,
   "end_elevation_m": 79.87512844746871,
   "start_xy": [
    215773.8277180433,
    57684.868681707354
   ],
   "end_xy": [
    215764.2468338514,
    57687.73340823908
   ]
  },
  "min_20m": {
   "gradient_pct": -6.046541391467031,
   "start_distance_m": 698.0,
   "end_distance_m": 718.0,
   "midpoint_distance_m": 708.0,
   "start_elevation_m": 81.04623247434964,
   "end_elevation_m": 79.83692419605623,
   "start_xy": [
    215782.45051381597,
    57682.2904278288
   ],
   "end_xy": [
    215763.2887454322,
    57688.01988089225
   ]
  },
  "min_25m": {
   "gradient_pct": -5.427260511156987,
   "start_distance_m": 694.0,
   "end_distance_m": 719.0,
   "midpoint_distance_m": 706.5,
   "start_elevation_m": 81.1745457704078,
   "end_elevation_m": 79.81773064261856,
   "start_xy": [
    215786.28286749273,
    57681.1445372161
   ],
   "end_xy": [
    215762.33065701302,
    57688.30635354543
   ]
  },
  "min_50m": {
   "gradient_pct": -4.139397030852024,
   "start_distance_m": 667.0,
   "end_distance_m": 717.0,
   "midpoint_distance_m": 692.0,
   "start_elevation_m": 81.94482696289472,
   "end_elevation_m": 79.87512844746871,
   "start_xy": [
    215812.15125481083,
    57673.40977558044
   ],
   "end_xy": [
    215764.2468338514,
    57687.73340823908
   ]
  },
  "min_100m": {
   "gradient_pct": -3.6897054447054103,
   "start_distance_m": 619.0,
   "end_distance_m": 719.0,
   "midpoint_distance_m": 669.0,
   "start_elevation_m": 83.50743608732397,
   "end_elevation_m": 79.81773064261856,
   "start_xy": [
    215855.23965512888,
    57654.35487270971
   ],
   "end_xy": [
    215762.33065701302,
    57688.30635354543
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.448062431913456,
   "start_distance_m": 373.0,
   "end_distance_m": 375.0,
   "midpoint_distance_m": 374.0,
   "start_elevation_m": 72.01194392281272,
   "end_elevation_m": 72.82090517145099,
   "start_xy": [
    216055.8246133864,
    57513.744448055426
   ],
   "end_xy": [
    216054.09465832644,
    57514.74806924421
   ]
  },
  "max_3m": {
   "gradient_pct": 33.6404150042128,
   "start_distance_m": 373.0,
   "end_distance_m": 376.0,
   "midpoint_distance_m": 374.5,
   "start_elevation_m": 72.01194392281272,
   "end_elevation_m": 73.0211563729391,
   "start_xy": [
    216055.8246133864,
    57513.744448055426
   ],
   "end_xy": [
    216053.22968079647,
    57515.2498798386
   ]
  }
 },
 "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": 0.017,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    0.0,
    21.0
   ]
  ],
  "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/SX1555.tif"
  ],
  "calculated_at": "2026-08-24T17:43:53+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12.osm.pbf",
  "osm_snapshot": "2026-08-12T20:21:46Z",
  "run_id": "verdicts-eng-7-260824",
  "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": [
   "SX1555.tif"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 surface model missing: [Errno 17] File exists: 'data/cache/england/bulk_dsm_1m'",
  "mask_ranges_m": [
   [
    0.0,
    16.0
   ]
  ],
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.3885, -4.5878)'",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Lanreath",
  "county": "Cornwall"
 }
}