{
 "ocl_version": "0.1.0",
 "name": "Dukewood Road",
 "slug": "dukewood-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.623121957267813,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 215.0,
   "end_distance_m": 217.0,
   "start_elevation_m": 122.52133004865652,
   "end_elevation_m": 123.01379248780188,
   "min_gradient_pct": -4.94365750241883
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.20772609992478,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 214.0,
   "end_distance_m": 217.0,
   "start_elevation_m": 122.28756070480414,
   "end_elevation_m": 123.01379248780188,
   "min_gradient_pct": -4.424026302223183
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.03902239419324,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 215.0,
   "end_distance_m": 220.0,
   "start_elevation_m": 122.52133004865652,
   "end_elevation_m": 123.72328116836619,
   "min_gradient_pct": -1.9709102057248629
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.587337165710665,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 214.0,
   "end_distance_m": 224.0,
   "start_elevation_m": 122.28756070480414,
   "end_elevation_m": 124.6462944213752,
   "min_gradient_pct": 0.10384804047646412
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.983781662359775,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 208.0,
   "end_distance_m": 228.0,
   "start_elevation_m": 120.95856643705096,
   "end_elevation_m": 125.55532276952292,
   "min_gradient_pct": 1.4383707172562765
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.787877290444385,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 206.0,
   "end_distance_m": 231.0,
   "start_elevation_m": 120.5273733863568,
   "end_elevation_m": 126.2243427089679,
   "min_gradient_pct": 1.5836039189437088
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.510188085098715,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 195.0,
   "end_distance_m": 245.0,
   "start_elevation_m": 118.61581166127257,
   "end_elevation_m": 128.87090570382193,
   "min_gradient_pct": 2.706038450521021
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.802069570321036,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 182.0,
   "end_distance_m": 282.0,
   "start_elevation_m": 117.27463014635853,
   "end_elevation_m": 132.07669971667957,
   "min_gradient_pct": 2.726497006322333
  }
 ],
 "shape": {
  "ascent_concentration": 0.512,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 78.0,
  "shape_class": "stepped"
 },
 "length_m": 459.0547994090155,
 "start_elevation_m": 111.63767293922317,
 "end_elevation_m": 141.932650427051,
 "endpoint_gain_m": 30.294977487827822,
 "overall_gradient_pct": 6.599425063593585,
 "accumulated_ascent_m": 30.56684713796345,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.03902239419324,
   "start_distance_m": 215.0,
   "end_distance_m": 220.0,
   "midpoint_distance_m": 217.5,
   "start_elevation_m": 122.52133004865652,
   "end_elevation_m": 123.72328116836619,
   "start_xy": [
    425538.8225220541,
    410600.1334409044
   ],
   "end_xy": [
    425543.1112234642,
    410602.7038572548
   ]
  },
  "max_10m": {
   "gradient_pct": 23.587337165710665,
   "start_distance_m": 214.0,
   "end_distance_m": 224.0,
   "midpoint_distance_m": 219.0,
   "start_elevation_m": 122.28756070480414,
   "end_elevation_m": 124.6462944213752,
   "start_xy": [
    425537.99662723945,
    410599.57165664545
   ],
   "end_xy": [
    425546.609020253,
    410604.6359105467
   ]
  },
  "max_20m": {
   "gradient_pct": 22.983781662359775,
   "start_distance_m": 208.0,
   "end_distance_m": 228.0,
   "midpoint_distance_m": 218.0,
   "start_elevation_m": 120.95856643705096,
   "end_elevation_m": 125.55532276952292,
   "start_xy": [
    425533.1746340205,
    410596.0011690883
   ],
   "end_xy": [
    425550.247476495,
    410606.2861474365
   ]
  },
  "max_25m": {
   "gradient_pct": 22.787877290444385,
   "start_distance_m": 206.0,
   "end_distance_m": 231.0,
   "midpoint_distance_m": 218.5,
   "start_elevation_m": 120.5273733863568,
   "end_elevation_m": 126.2243427089679,
   "start_xy": [
    425531.56730294746,
    410594.81100656925
   ],
   "end_xy": [
    425553.10253074527,
    410607.2073777161
   ]
  },
  "max_50m": {
   "gradient_pct": 20.510188085098715,
   "start_distance_m": 195.0,
   "end_distance_m": 245.0,
   "midpoint_distance_m": 220.0,
   "start_elevation_m": 118.61581166127257,
   "end_elevation_m": 128.87090570382193,
   "start_xy": [
    425521.572668989,
    410590.65167921263
   ],
   "end_xy": [
    425566.84036037524,
    410609.5886356767
   ]
  },
  "max_100m": {
   "gradient_pct": 14.802069570321036,
   "start_distance_m": 182.0,
   "end_distance_m": 282.0,
   "midpoint_distance_m": 232.0,
   "start_elevation_m": 117.27463014635853,
   "end_elevation_m": 132.07669971667957,
   "start_xy": [
    425508.77236937406,
    410591.24916440365
   ],
   "end_xy": [
    425600.41582666285,
    410623.02471666737
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.9709102057248629,
   "start_distance_m": 429.0,
   "end_distance_m": 434.0,
   "midpoint_distance_m": 431.5,
   "start_elevation_m": 141.4547564681597,
   "end_elevation_m": 141.35621095787346,
   "start_xy": [
    425632.77952692646,
    410694.14779070724
   ],
   "end_xy": [
    425634.13480404567,
    410689.33497199777
   ]
  },
  "min_10m": {
   "gradient_pct": 0.10384804047646412,
   "start_distance_m": 423.0,
   "end_distance_m": 433.0,
   "midpoint_distance_m": 428.0,
   "start_elevation_m": 141.3236105273333,
   "end_elevation_m": 141.33399533138095,
   "start_xy": [
    425631.1531943834,
    410699.92317315855
   ],
   "end_xy": [
    425633.86374862184,
    410690.29753573966
   ]
  },
  "min_20m": {
   "gradient_pct": 1.4383707172562765,
   "start_distance_m": 430.0,
   "end_distance_m": 450.0,
   "midpoint_distance_m": 440.0,
   "start_elevation_m": 141.46671612044764,
   "end_elevation_m": 141.7543902638989,
   "start_xy": [
    425633.0505823503,
    410693.18522696535
   ],
   "end_xy": [
    425638.47169082717,
    410673.93395212747
   ]
  },
  "min_25m": {
   "gradient_pct": 1.5836039189437088,
   "start_distance_m": 425.0,
   "end_distance_m": 450.0,
   "midpoint_distance_m": 437.5,
   "start_elevation_m": 141.35848928416297,
   "end_elevation_m": 141.7543902638989,
   "start_xy": [
    425631.6953052311,
    410697.99804567476
   ],
   "end_xy": [
    425638.47169082717,
    410673.93395212747
   ]
  },
  "min_50m": {
   "gradient_pct": 2.706038450521021,
   "start_distance_m": 51.0,
   "end_distance_m": 101.0,
   "midpoint_distance_m": 76.0,
   "start_elevation_m": 113.24734142103372,
   "end_elevation_m": 114.60036064629423,
   "start_xy": [
    425415.1992170365,
    410682.71616750467
   ],
   "end_xy": [
    425449.8922956799,
    410646.71189667034
   ]
  },
  "min_100m": {
   "gradient_pct": 2.726497006322333,
   "start_distance_m": 51.0,
   "end_distance_m": 151.0,
   "midpoint_distance_m": 101.0,
   "start_elevation_m": 113.24734142103372,
   "end_elevation_m": 115.97383842735606,
   "start_xy": [
    425415.1992170365,
    410682.71616750467
   ],
   "end_xy": [
    425485.35461326723,
    410611.472709332
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.623121957267813,
   "start_distance_m": 215.0,
   "end_distance_m": 217.0,
   "midpoint_distance_m": 216.0,
   "start_elevation_m": 122.52133004865652,
   "end_elevation_m": 123.01379248780188,
   "start_xy": [
    425538.8225220541,
    410600.1334409044
   ],
   "end_xy": [
    425540.5380026181,
    410601.1616074446
   ]
  },
  "max_3m": {
   "gradient_pct": 24.20772609992478,
   "start_distance_m": 214.0,
   "end_distance_m": 217.0,
   "midpoint_distance_m": 215.5,
   "start_elevation_m": 122.28756070480414,
   "end_elevation_m": 123.01379248780188,
   "start_xy": [
    425537.99662723945,
    410599.57165664545
   ],
   "end_xy": [
    425540.5380026181,
    410601.1616074446
   ]
  }
 },
 "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": 0.0,
   "obstruction_max_height_m": 1.63,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": []
 },
 "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/SE2510.tif"
  ],
  "calculated_at": "2026-09-04T08:05:24+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": "hs-bench-260904",
  "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": [
   "SE2510.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Scissett",
  "county": ""
 }
}