{
 "ocl_version": "0.1.0",
 "name": "Coal Road",
 "slug": "coal-road-5",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.014782404222615,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 339.0,
   "end_distance_m": 341.0,
   "start_elevation_m": 351.5244687941489,
   "end_elevation_m": 352.06476444223335,
   "min_gradient_pct": -14.938090155115447
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.836245724039525,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 340.0,
   "end_distance_m": 343.0,
   "start_elevation_m": 351.7912156883148,
   "end_elevation_m": 352.596303060036,
   "min_gradient_pct": -13.011350987119386
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.63271377752153,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 339.0,
   "end_distance_m": 344.0,
   "start_elevation_m": 351.5244687941489,
   "end_elevation_m": 352.856104483025,
   "min_gradient_pct": -8.996477890918868
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.433397175178243,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 335.0,
   "end_distance_m": 345.0,
   "start_elevation_m": 350.5467391212301,
   "end_elevation_m": 353.0900788387479,
   "min_gradient_pct": -7.796995874430763
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.66045571106247,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 327.0,
   "end_distance_m": 347.0,
   "start_elevation_m": 348.95876718801856,
   "end_elevation_m": 353.49085833023105,
   "min_gradient_pct": -7.134923306931
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.87786094644821,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 321.0,
   "end_distance_m": 346.0,
   "start_elevation_m": 347.8303005428394,
   "end_elevation_m": 353.29976577945143,
   "min_gradient_pct": -6.772406569877148
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.66681307066642,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 296.0,
   "end_distance_m": 346.0,
   "start_elevation_m": 342.9663592441182,
   "end_elevation_m": 353.29976577945143,
   "min_gradient_pct": -4.203250825391478
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.906187401087948,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 292.0,
   "end_distance_m": 392.0,
   "start_elevation_m": 342.24656780168334,
   "end_elevation_m": 361.1527552027713,
   "min_gradient_pct": -1.641385993623146,
   "suppressed_max_gradient_pct": 18.93995278012062,
   "suppressed_location_m": [
    289.0,
    389.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.33,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 284.0,
  "shape_class": "sustained"
 },
 "length_m": 2222.4181406568355,
 "start_elevation_m": 313.1800284091809,
 "end_elevation_m": 528.5851943178716,
 "endpoint_gain_m": 215.40516590869066,
 "overall_gradient_pct": 9.692377953908695,
 "accumulated_ascent_m": 219.92560009891275,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.63271377752153,
   "start_distance_m": 339.0,
   "end_distance_m": 344.0,
   "midpoint_distance_m": 341.5,
   "start_elevation_m": 351.5244687941489,
   "end_elevation_m": 352.856104483025,
   "start_xy": [
    378804.94847121224,
    491677.3491979001
   ],
   "end_xy": [
    378804.04674541345,
    491672.4758747888
   ]
  },
  "max_10m": {
   "gradient_pct": 25.433397175178243,
   "start_distance_m": 335.0,
   "end_distance_m": 345.0,
   "midpoint_distance_m": 340.0,
   "start_elevation_m": 350.5467391212301,
   "end_elevation_m": 353.0900788387479,
   "start_xy": [
    378804.87015063415,
    491681.3378937531
   ],
   "end_xy": [
    378803.7125298762,
    491671.5333781292
   ]
  },
  "max_20m": {
   "gradient_pct": 22.66045571106247,
   "start_distance_m": 327.0,
   "end_distance_m": 347.0,
   "midpoint_distance_m": 337.0,
   "start_elevation_m": 348.95876718801856,
   "end_elevation_m": 353.49085833023105,
   "start_xy": [
    378801.3769058548,
    491688.2533404816
   ],
   "end_xy": [
    378803.04364979314,
    491669.6485441763
   ]
  },
  "max_25m": {
   "gradient_pct": 21.87786094644821,
   "start_distance_m": 321.0,
   "end_distance_m": 346.0,
   "midpoint_distance_m": 333.5,
   "start_elevation_m": 347.8303005428394,
   "end_elevation_m": 353.29976577945143,
   "start_xy": [
    378797.5406061306,
    491692.8369032571
   ],
   "end_xy": [
    378803.37781110755,
    491670.59106006986
   ]
  },
  "max_50m": {
   "gradient_pct": 20.66681307066642,
   "start_distance_m": 296.0,
   "end_distance_m": 346.0,
   "midpoint_distance_m": 321.0,
   "start_elevation_m": 342.9663592441182,
   "end_elevation_m": 353.29976577945143,
   "start_xy": [
    378776.58066074597,
    491706.4629691991
   ],
   "end_xy": [
    378803.37781110755,
    491670.59106006986
   ]
  },
  "max_100m": {
   "gradient_pct": 18.906187401087948,
   "start_distance_m": 292.0,
   "end_distance_m": 392.0,
   "midpoint_distance_m": 342.0,
   "start_elevation_m": 342.24656780168334,
   "end_elevation_m": 361.1527552027713,
   "start_xy": [
    378773.38552518183,
    491708.8563959191
   ],
   "end_xy": [
    378788.4028829219,
    491627.15518084477
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.996477890918868,
   "start_distance_m": 1690.0,
   "end_distance_m": 1695.0,
   "midpoint_distance_m": 1692.5,
   "start_elevation_m": 484.4877766384059,
   "end_elevation_m": 484.03795274385993,
   "start_xy": [
    378890.06046135625,
    490357.88328024006
   ],
   "end_xy": [
    378892.30132766423,
    490353.41354702716
   ]
  },
  "min_10m": {
   "gradient_pct": -7.796995874430763,
   "start_distance_m": 1685.0,
   "end_distance_m": 1695.0,
   "midpoint_distance_m": 1690.0,
   "start_elevation_m": 484.817652331303,
   "end_elevation_m": 484.03795274385993,
   "start_xy": [
    378887.82039415324,
    490362.35341434606
   ],
   "end_xy": [
    378892.30132766423,
    490353.41354702716
   ]
  },
  "min_20m": {
   "gradient_pct": -7.134923306931,
   "start_distance_m": 1683.0,
   "end_distance_m": 1703.0,
   "midpoint_distance_m": 1693.0,
   "start_elevation_m": 484.9733230779528,
   "end_elevation_m": 483.5463384165666,
   "start_xy": [
    378886.924367272,
    490364.1414679885
   ],
   "end_xy": [
    378894.9053647902,
    490345.8618214895
   ]
  },
  "min_25m": {
   "gradient_pct": -6.772406569877148,
   "start_distance_m": 1679.0,
   "end_distance_m": 1704.0,
   "midpoint_distance_m": 1691.5,
   "start_elevation_m": 485.1997637141543,
   "end_elevation_m": 483.506662071685,
   "start_xy": [
    378885.1315144046,
    490367.71717438014
   ],
   "end_xy": [
    378895.20418156555,
    490344.9075109916
   ]
  },
  "min_50m": {
   "gradient_pct": -4.203250825391478,
   "start_distance_m": 1654.0,
   "end_distance_m": 1704.0,
   "midpoint_distance_m": 1679.0,
   "start_elevation_m": 485.60828748438075,
   "end_elevation_m": 483.506662071685,
   "start_xy": [
    378873.9284614933,
    490390.0664820156
   ],
   "end_xy": [
    378895.20418156555,
    490344.9075109916
   ]
  },
  "min_100m": {
   "gradient_pct": -1.641385993623146,
   "start_distance_m": 1622.0,
   "end_distance_m": 1722.0,
   "midpoint_distance_m": 1672.0,
   "start_elevation_m": 485.0878199581777,
   "end_elevation_m": 483.44643396455456,
   "start_xy": [
    378861.7390303687,
    490419.64858853735
   ],
   "end_xy": [
    378896.6915726378,
    490327.3898487139
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.014782404222615,
   "start_distance_m": 339.0,
   "end_distance_m": 341.0,
   "midpoint_distance_m": 340.0,
   "start_elevation_m": 351.5244687941489,
   "end_elevation_m": 352.06476444223335,
   "start_xy": [
    378804.94847121224,
    491677.3491979001
   ],
   "end_xy": [
    378804.82273042365,
    491675.3531802204
   ]
  },
  "max_3m": {
   "gradient_pct": 26.836245724039525,
   "start_distance_m": 340.0,
   "end_distance_m": 343.0,
   "midpoint_distance_m": 341.5,
   "start_elevation_m": 351.7912156883148,
   "end_elevation_m": 352.596303060036,
   "start_xy": [
    378804.8864664997,
    491676.35112204344
   ],
   "end_xy": [
    378804.38063014316,
    491673.41848869756
   ]
  }
 },
 "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": 0.004,
   "obstruction_max_height_m": 5.51,
   "flagged_windows_m": []
  },
  "structure_suppression": {
   "masked_fraction": 0.02,
   "windows_resited": [
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    247.0,
    291.0
   ]
  ],
  "review": [],
  "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/bulk_dtm_1m/SD7585.tif",
   "data/cache/england/bulk_dtm_1m/SD7590.tif"
  ],
  "calculated_at": "2026-08-19T22:10:38+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",
  "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": [
   "SD7585.tif",
   "SD7590.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 14.9% over 200 m (Terrain 50), gain 180.3 m over 1916 m way. EXTENDED by graph walk: +6 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (England launch slice 2026-08-16): clean-steep."
 },
 "area": {
  "place": "Garsdale Head",
  "county": "Westmorland and Furness"
 }
}