{
 "ocl_version": "0.1.0",
 "name": "Cliffe Road",
 "slug": "cliffe-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 35.92115659291579,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 95.0,
   "end_distance_m": 97.0,
   "start_elevation_m": 164.63929093061057,
   "end_elevation_m": 165.3577140624689,
   "min_gradient_pct": -18.9879627423565,
   "suppressed_max_gradient_pct": 41.03437005136925,
   "suppressed_location_m": [
    0.0,
    2.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.762132162824248,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 42.0,
   "end_distance_m": 45.0,
   "start_elevation_m": 158.33833670651677,
   "end_elevation_m": 159.2912006714015,
   "min_gradient_pct": -17.39112625038975
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.726036648957006,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 92.0,
   "end_distance_m": 97.0,
   "start_elevation_m": 164.12141223002104,
   "end_elevation_m": 165.3577140624689,
   "min_gradient_pct": -9.788173105997089
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.12671741895923,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 180.0,
   "end_distance_m": 190.0,
   "start_elevation_m": 177.69118468881481,
   "end_elevation_m": 179.80385643071074,
   "min_gradient_pct": -4.838088051312184
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.321967549487425,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 197.0,
   "end_distance_m": 217.0,
   "start_elevation_m": 181.08662159985542,
   "end_elevation_m": 185.1510151097529,
   "min_gradient_pct": -0.4684865026369778
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.087316372599275,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 182.0,
   "end_distance_m": 207.0,
   "start_elevation_m": 178.0583151490943,
   "end_elevation_m": 183.08014424224413,
   "min_gradient_pct": 0.633862633917488
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.692028495184957,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 167.0,
   "end_distance_m": 217.0,
   "start_elevation_m": 175.30500086216043,
   "end_elevation_m": 185.1510151097529,
   "min_gradient_pct": 1.2345150760657475
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.402852048963155,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 148.0,
   "end_distance_m": 248.0,
   "start_elevation_m": 171.96793292784827,
   "end_elevation_m": 190.37078497681142,
   "min_gradient_pct": 2.4885867133523902
  }
 ],
 "shape": {
  "ascent_concentration": 0.467,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 188.0,
  "shape_class": "stepped"
 },
 "length_m": 594.9999999999912,
 "start_elevation_m": 151.4313354640855,
 "end_elevation_m": 205.99459425488436,
 "endpoint_gain_m": 54.56325879079887,
 "overall_gradient_pct": 9.170295595092382,
 "accumulated_ascent_m": 56.14993363403886,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.726036648957006,
   "start_distance_m": 92.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 94.5,
   "start_elevation_m": 164.12141223002104,
   "end_elevation_m": 165.3577140624689,
   "start_xy": [
    403944.6109176727,
    393887.643490181
   ],
   "end_xy": [
    403942.5388723175,
    393883.09303657216
   ]
  },
  "max_10m": {
   "gradient_pct": 21.12671741895923,
   "start_distance_m": 180.0,
   "end_distance_m": 190.0,
   "midpoint_distance_m": 185.0,
   "start_elevation_m": 177.69118468881481,
   "end_elevation_m": 179.80385643071074,
   "start_xy": [
    403924.29378992645,
    393803.1631502112
   ],
   "end_xy": [
    403924.58985143283,
    393793.16873766435
   ]
  },
  "max_20m": {
   "gradient_pct": 20.321967549487425,
   "start_distance_m": 197.0,
   "end_distance_m": 217.0,
   "midpoint_distance_m": 207.0,
   "start_elevation_m": 181.08662159985542,
   "end_elevation_m": 185.1510151097529,
   "start_xy": [
    403924.59561077267,
    393786.16874003364
   ],
   "end_xy": [
    403927.6371113025,
    393766.48667440057
   ]
  },
  "max_25m": {
   "gradient_pct": 20.087316372599275,
   "start_distance_m": 182.0,
   "end_distance_m": 207.0,
   "midpoint_distance_m": 194.5,
   "start_elevation_m": 178.0583151490943,
   "end_elevation_m": 183.08014424224413,
   "start_xy": [
    403924.36971768434,
    393801.16459198704
   ],
   "end_xy": [
    403925.566154713,
    393776.2698813801
   ]
  },
  "max_50m": {
   "gradient_pct": 19.692028495184957,
   "start_distance_m": 167.0,
   "end_distance_m": 217.0,
   "midpoint_distance_m": 192.0,
   "start_elevation_m": 175.30500086216043,
   "end_elevation_m": 185.1510151097529,
   "start_xy": [
    403925.27229959704,
    393816.0540988331
   ],
   "end_xy": [
    403927.6371113025,
    393766.48667440057
   ]
  },
  "max_100m": {
   "gradient_pct": 18.402852048963155,
   "start_distance_m": 148.0,
   "end_distance_m": 248.0,
   "midpoint_distance_m": 198.0,
   "start_elevation_m": 171.96793292784827,
   "end_elevation_m": 190.37078497681142,
   "start_xy": [
    403928.4376561136,
    393834.78834539023
   ],
   "end_xy": [
    403925.68004619953,
    393735.55764872994
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.788173105997089,
   "start_distance_m": 372.0,
   "end_distance_m": 377.0,
   "midpoint_distance_m": 374.5,
   "start_elevation_m": 200.25172607596716,
   "end_elevation_m": 199.7623174206673,
   "start_xy": [
    403855.14195875626,
    393634.95096309844
   ],
   "end_xy": [
    403853.1334293579,
    393630.37211939547
   ]
  },
  "min_10m": {
   "gradient_pct": -4.838088051312184,
   "start_distance_m": 371.0,
   "end_distance_m": 381.0,
   "midpoint_distance_m": 376.0,
   "start_elevation_m": 200.2485986349499,
   "end_elevation_m": 199.76478982981868,
   "start_xy": [
    403855.5690615208,
    393635.85509476485
   ],
   "end_xy": [
    403851.5266058392,
    393626.70904443314
   ]
  },
  "min_20m": {
   "gradient_pct": -0.4684865026369778,
   "start_distance_m": 369.0,
   "end_distance_m": 389.0,
   "midpoint_distance_m": 379.0,
   "start_elevation_m": 200.13822892909235,
   "end_elevation_m": 200.04453162856495,
   "start_xy": [
    403856.4316733076,
    393637.659506277
   ],
   "end_xy": [
    403848.3129588018,
    393619.3828945084
   ]
  },
  "min_25m": {
   "gradient_pct": 0.633862633917488,
   "start_distance_m": 355.0,
   "end_distance_m": 380.0,
   "midpoint_distance_m": 367.5,
   "start_elevation_m": 199.63976187817667,
   "end_elevation_m": 199.79822753665604,
   "start_xy": [
    403862.4699558154,
    393650.2903868621
   ],
   "end_xy": [
    403851.92831171886,
    393627.6248131737
   ]
  },
  "min_50m": {
   "gradient_pct": 1.2345150760657475,
   "start_distance_m": 336.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 361.0,
   "start_elevation_m": 199.20760387319655,
   "end_elevation_m": 199.82486141122942,
   "start_xy": [
    403871.85438643035,
    393666.7425347505
   ],
   "end_xy": [
    403849.51807644084,
    393622.13020073023
   ]
  },
  "min_100m": {
   "gradient_pct": 2.4885867133523902,
   "start_distance_m": 495.0,
   "end_distance_m": 595.0,
   "midpoint_distance_m": 545.0,
   "start_elevation_m": 203.50600754153197,
   "end_elevation_m": 205.99459425488436,
   "start_xy": [
    403820.8074307661,
    393517.11541416094
   ],
   "end_xy": [
    403781.36807613634,
    393426.59336494777
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 35.92115659291579,
   "start_distance_m": 95.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 96.0,
   "start_elevation_m": 164.63929093061057,
   "end_elevation_m": 165.3577140624689,
   "start_xy": [
    403943.3676904596,
    393884.9132180157
   ],
   "end_xy": [
    403942.5388723175,
    393883.09303657216
   ]
  },
  "max_3m": {
   "gradient_pct": 31.762132162824248,
   "start_distance_m": 42.0,
   "end_distance_m": 45.0,
   "midpoint_distance_m": 43.5,
   "start_elevation_m": 158.33833670651677,
   "end_elevation_m": 159.2912006714015,
   "start_xy": [
    403924.8066607497,
    393916.9401906746
   ],
   "end_xy": [
    403927.4852504594,
    393915.5892068971
   ]
  }
 },
 "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": 0.007,
   "windows_resited": [
    2.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.015,
   "obstruction_max_height_m": 8.33,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    0.0,
    3.0
   ]
  ],
  "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/SK0090.tif"
  ],
  "calculated_at": "2026-09-05T07:20:37+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-27-roads.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "summit-260905-summit-england-england-2026-08-27",
  "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": [
   "SK0090.tif"
  ],
  "route_summit_trim_m": 112.9,
  "route_summit_trim_loss_m": 3.1,
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Glossop",
  "county": "Derbyshire"
 }
}