{
 "ocl_version": "0.1.0",
 "name": "Bamford Clough",
 "slug": "bamford-clough",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 39.54411531987034,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 217.0,
   "end_distance_m": 219.0,
   "start_elevation_m": 194.37672962943492,
   "end_elevation_m": 195.16761193583233,
   "min_gradient_pct": -25.517460049795204
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 34.719890680429444,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 217.0,
   "end_distance_m": 220.0,
   "start_elevation_m": 194.37672962943492,
   "end_elevation_m": 195.4183263498478,
   "min_gradient_pct": -20.471673433396138
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 33.52096897954311,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 217.0,
   "end_distance_m": 222.0,
   "start_elevation_m": 194.37672962943492,
   "end_elevation_m": 196.05277807841208,
   "min_gradient_pct": -14.997710923862542
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.091814888767317,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 217.0,
   "end_distance_m": 227.0,
   "start_elevation_m": 194.37672962943492,
   "end_elevation_m": 197.18591111831165,
   "min_gradient_pct": -6.106805768152412
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.88333826316324,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 208.0,
   "end_distance_m": 228.0,
   "start_elevation_m": 193.0080486195373,
   "end_elevation_m": 197.38471627216995,
   "min_gradient_pct": 0.9772332995422062
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.657775593533074,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 273.0,
   "end_distance_m": 298.0,
   "start_elevation_m": 203.1781140812123,
   "end_elevation_m": 208.34255797959557,
   "min_gradient_pct": 2.950052416866697
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.01375511081409,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 197.0,
   "end_distance_m": 247.0,
   "start_elevation_m": 191.59779176376333,
   "end_elevation_m": 200.10466931917037,
   "min_gradient_pct": 5.8179380658472155
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.614148486172468,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 198.0,
   "end_distance_m": 298.0,
   "start_elevation_m": 191.7284094934231,
   "end_elevation_m": 208.34255797959557,
   "min_gradient_pct": 6.152251490346657
  }
 ],
 "shape": {
  "ascent_concentration": 0.383,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 99.0,
  "shape_class": "sustained"
 },
 "length_m": 298.7585202052873,
 "start_elevation_m": 176.11178164404197,
 "end_elevation_m": 208.4838793304499,
 "endpoint_gain_m": 32.372097686407926,
 "overall_gradient_pct": 10.835539573620842,
 "accumulated_ascent_m": 33.34036463278662,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 33.52096897954311,
   "start_distance_m": 217.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 219.5,
   "start_elevation_m": 194.37672962943492,
   "end_elevation_m": 196.05277807841208,
   "start_xy": [
    420941.9870920209,
    383681.49163659103
   ],
   "end_xy": [
    420945.371993548,
    383685.1716422502
   ]
  },
  "max_10m": {
   "gradient_pct": 28.091814888767317,
   "start_distance_m": 217.0,
   "end_distance_m": 227.0,
   "midpoint_distance_m": 222.0,
   "start_elevation_m": 194.37672962943492,
   "end_elevation_m": 197.18591111831165,
   "start_xy": [
    420941.9870920209,
    383681.49163659103
   ],
   "end_xy": [
    420948.7568950751,
    383688.85164790944
   ]
  },
  "max_20m": {
   "gradient_pct": 21.88333826316324,
   "start_distance_m": 208.0,
   "end_distance_m": 228.0,
   "midpoint_distance_m": 218.0,
   "start_elevation_m": 193.0080486195373,
   "end_elevation_m": 197.38471627216995,
   "start_xy": [
    420935.89425845933,
    383674.8676363502
   ],
   "end_xy": [
    420949.4338753805,
    383689.5876490413
   ]
  },
  "max_25m": {
   "gradient_pct": 20.657775593533074,
   "start_distance_m": 273.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 285.5,
   "start_elevation_m": 203.1781140812123,
   "end_elevation_m": 208.34255797959557,
   "start_xy": [
    420979.89798912435,
    383722.7076999743
   ],
   "end_xy": [
    420996.82249675976,
    383741.1077282704
   ]
  },
  "max_50m": {
   "gradient_pct": 17.01375511081409,
   "start_distance_m": 197.0,
   "end_distance_m": 247.0,
   "midpoint_distance_m": 222.0,
   "start_elevation_m": 191.59779176376333,
   "end_elevation_m": 200.10466931917037,
   "start_xy": [
    420928.4720046747,
    383666.7494583734
   ],
   "end_xy": [
    420962.2965011835,
    383703.5716705463
   ]
  },
  "max_100m": {
   "gradient_pct": 16.614148486172468,
   "start_distance_m": 198.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 248.0,
   "start_elevation_m": 191.7284094934231,
   "end_elevation_m": 208.34255797959557,
   "start_xy": [
    420929.1358929744,
    383667.4972901229
   ],
   "end_xy": [
    420996.82249675976,
    383741.1077282704
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -14.997710923862542,
   "start_distance_m": 141.0,
   "end_distance_m": 146.0,
   "midpoint_distance_m": 143.5,
   "start_elevation_m": 186.38723037834558,
   "end_elevation_m": 185.63734483215245,
   "start_xy": [
    420885.6392279815,
    383632.10008205485
   ],
   "end_xy": [
    420890.0675917274,
    383634.4216320832
   ]
  },
  "min_10m": {
   "gradient_pct": -6.106805768152412,
   "start_distance_m": 140.0,
   "end_distance_m": 150.0,
   "midpoint_distance_m": 145.0,
   "start_elevation_m": 186.47547726371783,
   "end_elevation_m": 185.8647966869026,
   "start_xy": [
    420884.7535552323,
    383631.6357720492
   ],
   "end_xy": [
    420893.61028272414,
    383636.2788721058
   ]
  },
  "min_20m": {
   "gradient_pct": 0.9772332995422062,
   "start_distance_m": 139.0,
   "end_distance_m": 159.0,
   "midpoint_distance_m": 149.0,
   "start_elevation_m": 186.38258136257105,
   "end_elevation_m": 186.5780280224795,
   "start_xy": [
    420883.8678824831,
    383631.17146204354
   ],
   "end_xy": [
    420901.5813374667,
    383640.4576621568
   ]
  },
  "min_25m": {
   "gradient_pct": 2.950052416866697,
   "start_distance_m": 139.0,
   "end_distance_m": 164.0,
   "midpoint_distance_m": 151.5,
   "start_elevation_m": 186.38258136257105,
   "end_elevation_m": 187.12009446678772,
   "start_xy": [
    420883.8678824831,
    383631.17146204354
   ],
   "end_xy": [
    420906.00970121264,
    383642.7792121851
   ]
  },
  "min_50m": {
   "gradient_pct": 5.8179380658472155,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 176.11178164404197,
   "end_elevation_m": 179.02075067696558,
   "start_xy": [
    420772.312,
    383553.376
   ],
   "end_xy": [
    420808.64407303615,
    383584.2360403251
   ]
  },
  "min_100m": {
   "gradient_pct": 6.152251490346657,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 176.11178164404197,
   "end_elevation_m": 182.26403313438863,
   "start_xy": [
    420772.312,
    383553.376
   ],
   "end_xy": [
    420850.63334063557,
    383610.9948756472
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 39.54411531987034,
   "start_distance_m": 217.0,
   "end_distance_m": 219.0,
   "midpoint_distance_m": 218.0,
   "start_elevation_m": 194.37672962943492,
   "end_elevation_m": 195.16761193583233,
   "start_xy": [
    420941.9870920209,
    383681.49163659103
   ],
   "end_xy": [
    420943.34105263173,
    383682.9636388547
   ]
  },
  "max_3m": {
   "gradient_pct": 34.719890680429444,
   "start_distance_m": 217.0,
   "end_distance_m": 220.0,
   "midpoint_distance_m": 218.5,
   "start_elevation_m": 194.37672962943492,
   "end_elevation_m": 195.4183263498478,
   "start_xy": [
    420941.9870920209,
    383681.49163659103
   ],
   "end_xy": [
    420944.0180329372,
    383683.69963998656
   ]
  }
 },
 "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": 0.09,
   "obstruction_max_height_m": 8.08,
   "flagged_windows_m": []
  },
  "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/SK2080.tif"
  ],
  "calculated_at": "2026-09-01T10:50:25+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12-roads.osm.pbf",
  "osm_snapshot": "2026-08-12T20:21:46Z",
  "run_id": "chunk-06-260901",
  "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": [
   "SK2080.tif"
  ],
  "trimmed_from": "bamford-clough",
  "trim_cut_m": [
   [
    298.8,
    490.0
   ]
  ],
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Bamford",
  "county": "Derbyshire"
 }
}