{
 "ocl_version": "0.1.0",
 "name": "Kingsdon Hill",
 "slug": "kingsdon-hill",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.90624015878947,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 285.0,
   "end_distance_m": 287.0,
   "start_elevation_m": 40.71790746864074,
   "end_elevation_m": 41.47603227181653,
   "min_gradient_pct": -14.004154551724035,
   "suppressed_max_gradient_pct": 41.29777981801972,
   "suppressed_location_m": [
    64.0,
    66.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.7305547101175,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 284.0,
   "end_distance_m": 287.0,
   "start_elevation_m": 40.374115630513,
   "end_elevation_m": 41.47603227181653,
   "min_gradient_pct": -10.198699701340056,
   "suppressed_max_gradient_pct": 37.2377123960837,
   "suppressed_location_m": [
    64.0,
    67.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.169380395717383,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 283.0,
   "end_distance_m": 288.0,
   "start_elevation_m": 40.25169875923321,
   "end_elevation_m": 41.660167779019076,
   "min_gradient_pct": -3.751432498566203,
   "suppressed_max_gradient_pct": 30.883604841774353,
   "suppressed_location_m": [
    63.0,
    68.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.68685051563537,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 253.0,
   "end_distance_m": 263.0,
   "start_elevation_m": 35.93822907398587,
   "end_elevation_m": 38.20691412554941,
   "min_gradient_pct": 0.7009712558188852
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.060330151548854,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 284.0,
   "end_distance_m": 304.0,
   "start_elevation_m": 40.374115630513,
   "end_elevation_m": 44.586181660822774,
   "min_gradient_pct": 3.6473664167813347
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.21572312918846,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 284.0,
   "end_distance_m": 309.0,
   "start_elevation_m": 40.374115630513,
   "end_elevation_m": 45.42804641281012,
   "min_gradient_pct": 3.0607037693266714
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.49931292035619,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 284.0,
   "end_distance_m": 334.0,
   "start_elevation_m": 40.374115630513,
   "end_elevation_m": 50.1237720906911,
   "min_gradient_pct": 5.4785690768952335
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.177825737129908,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 248.0,
   "end_distance_m": 348.0,
   "start_elevation_m": 35.04227814378616,
   "end_elevation_m": 52.22010388091607,
   "min_gradient_pct": 8.348478338385865
  }
 ],
 "shape": {
  "ascent_concentration": 0.378,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 83.0,
  "shape_class": "sustained"
 },
 "length_m": 359.0000000000018,
 "start_elevation_m": 12.801881791697046,
 "end_elevation_m": 53.38432728879644,
 "endpoint_gain_m": 40.5824454970994,
 "overall_gradient_pct": 11.304302366879998,
 "accumulated_ascent_m": 41.58546106463142,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.169380395717383,
   "start_distance_m": 283.0,
   "end_distance_m": 288.0,
   "midpoint_distance_m": 285.5,
   "start_elevation_m": 40.25169875923321,
   "end_elevation_m": 41.660167779019076,
   "start_xy": [
    325676.7430697658,
    94396.05094746697
   ],
   "end_xy": [
    325673.0731958033,
    94392.65506423195
   ]
  },
  "max_10m": {
   "gradient_pct": 22.68685051563537,
   "start_distance_m": 253.0,
   "end_distance_m": 263.0,
   "midpoint_distance_m": 258.0,
   "start_elevation_m": 35.93822907398587,
   "end_elevation_m": 38.20691412554941,
   "start_xy": [
    325698.7618436175,
    94416.42675451809
   ],
   "end_xy": [
    325691.42210394604,
    94409.63497913255
   ]
  },
  "max_20m": {
   "gradient_pct": 21.060330151548854,
   "start_distance_m": 284.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 294.0,
   "start_elevation_m": 40.374115630513,
   "end_elevation_m": 44.586181660822774,
   "start_xy": [
    325676.0094858328,
    94395.37134861104
   ],
   "end_xy": [
    325662.148858777,
    94381.03365999197
   ]
  },
  "max_25m": {
   "gradient_pct": 20.21572312918846,
   "start_distance_m": 284.0,
   "end_distance_m": 309.0,
   "midpoint_distance_m": 296.5,
   "start_elevation_m": 40.374115630513,
   "end_elevation_m": 45.42804641281012,
   "start_xy": [
    325676.0094858328,
    94395.37134861104
   ],
   "end_xy": [
    325659.0819346012,
    94377.08473953496
   ]
  },
  "max_50m": {
   "gradient_pct": 19.49931292035619,
   "start_distance_m": 284.0,
   "end_distance_m": 334.0,
   "midpoint_distance_m": 309.0,
   "start_elevation_m": 40.374115630513,
   "end_elevation_m": 50.1237720906911,
   "start_xy": [
    325676.0094858328,
    94395.37134861104
   ],
   "end_xy": [
    325643.7489932236,
    94357.33883303984
   ]
  },
  "max_100m": {
   "gradient_pct": 17.177825737129908,
   "start_distance_m": 248.0,
   "end_distance_m": 348.0,
   "midpoint_distance_m": 298.0,
   "start_elevation_m": 35.04227814378616,
   "end_elevation_m": 52.22010388091607,
   "start_xy": [
    325702.3778464887,
    94419.87659777422
   ],
   "end_xy": [
    325635.6142417086,
    94345.95036537542
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.751432498566203,
   "start_distance_m": 68.0,
   "end_distance_m": 73.0,
   "midpoint_distance_m": 70.5,
   "start_elevation_m": 17.981787516020333,
   "end_elevation_m": 17.794215891092023,
   "start_xy": [
    325790.73905679374,
    94574.98592836931
   ],
   "end_xy": [
    325787.43303231674,
    94571.23490222031
   ]
  },
  "min_10m": {
   "gradient_pct": 0.7009712558188852,
   "start_distance_m": 49.0,
   "end_distance_m": 59.0,
   "midpoint_distance_m": 54.0,
   "start_elevation_m": 16.069353876786685,
   "end_elevation_m": 16.139451002368574,
   "start_xy": [
    325801.84311650536,
    94590.40316199033
   ],
   "end_xy": [
    325796.0080549137,
    94582.28207635265
   ]
  },
  "min_20m": {
   "gradient_pct": 3.6473664167813347,
   "start_distance_m": 37.0,
   "end_distance_m": 57.0,
   "midpoint_distance_m": 47.0,
   "start_elevation_m": 15.331679863780703,
   "end_elevation_m": 16.06115314713697,
   "start_xy": [
    325808.84481154283,
    94600.1487371944
   ],
   "end_xy": [
    325797.1751621109,
    94583.9062254008
   ]
  },
  "min_25m": {
   "gradient_pct": 3.0607037693266714,
   "start_distance_m": 33.0,
   "end_distance_m": 58.0,
   "midpoint_distance_m": 45.5,
   "start_elevation_m": 15.321256811713225,
   "end_elevation_m": 16.086432754044893,
   "start_xy": [
    325811.1790255708,
    94603.39703555388
   ],
   "end_xy": [
    325796.5919381488,
    94583.09391400134
   ]
  },
  "min_50m": {
   "gradient_pct": 5.4785690768952335,
   "start_distance_m": 13.0,
   "end_distance_m": 63.0,
   "midpoint_distance_m": 38.0,
   "start_elevation_m": 13.698322735483998,
   "end_elevation_m": 16.437607273931615,
   "start_xy": [
    325823.16686333815,
    94619.40282285401
   ],
   "end_xy": [
    325793.6738406995,
    94579.03377812686
   ]
  },
  "min_100m": {
   "gradient_pct": 8.348478338385865,
   "start_distance_m": 19.0,
   "end_distance_m": 119.0,
   "midpoint_distance_m": 69.0,
   "start_elevation_m": 14.438017180608467,
   "end_elevation_m": 22.786495518994332,
   "start_xy": [
    325819.5031893505,
    94614.65124544282
   ],
   "end_xy": [
    325757.69262341055,
    94536.24552723742
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.90624015878947,
   "start_distance_m": 285.0,
   "end_distance_m": 287.0,
   "midpoint_distance_m": 286.0,
   "start_elevation_m": 40.71790746864074,
   "end_elevation_m": 41.47603227181653,
   "start_xy": [
    325675.2754113205,
    94394.69227968203
   ],
   "end_xy": [
    325673.8072622958,
    94393.33414182405
   ]
  },
  "max_3m": {
   "gradient_pct": 36.7305547101175,
   "start_distance_m": 284.0,
   "end_distance_m": 287.0,
   "midpoint_distance_m": 285.5,
   "start_elevation_m": 40.374115630513,
   "end_elevation_m": 41.47603227181653,
   "start_xy": [
    325676.0094858328,
    94395.37134861104
   ],
   "end_xy": [
    325673.8072622958,
    94393.33414182405
   ]
  }
 },
 "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": {
  "texture_suppression": {
   "masked_fraction": 0.028,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 5.0,
     "start_m": 63.0,
     "end_m": 68.0,
     "raw_pct": 30.88,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.122,
   "obstruction_max_height_m": 9.55,
   "flagged_windows_m": [
    2,
    3,
    5,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    61.0,
    70.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "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/dtm_1m/E324000_N94000_2000m.tif"
  ],
  "calculated_at": "2026-09-15T03:56:07+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": [
   "E324000_N94000_2000m.tif"
  ],
  "route_cut_m": 359.0,
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Colyton",
  "county": "Devon"
 }
}