{
 "ocl_version": "0.1.0",
 "name": "Drunken Bridge Hill",
 "slug": "drunken-bridge-hill",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 43.547599945538806,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 375.0,
   "end_distance_m": 377.0,
   "start_elevation_m": 60.87917734863579,
   "end_elevation_m": 61.75012934754657,
   "min_gradient_pct": -17.09595525898777
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.88814363486633,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 370.0,
   "end_distance_m": 373.0,
   "start_elevation_m": 59.45726635667718,
   "end_elevation_m": 60.56391066572317,
   "min_gradient_pct": -16.140125330428152
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 33.252995795904496,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 368.0,
   "end_distance_m": 373.0,
   "start_elevation_m": 58.901260875927946,
   "end_elevation_m": 60.56391066572317,
   "min_gradient_pct": -11.867859049353342
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.748821610952508,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 368.0,
   "end_distance_m": 378.0,
   "start_elevation_m": 58.901260875927946,
   "end_elevation_m": 61.776143037023196,
   "min_gradient_pct": -5.953809470456974
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.623386359741616,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 424.0,
   "end_distance_m": 444.0,
   "start_elevation_m": 66.72535479611503,
   "end_elevation_m": 71.45003206806335,
   "min_gradient_pct": -2.170416571188909
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.767392599212318,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 419.0,
   "end_distance_m": 444.0,
   "start_elevation_m": 66.00818391826027,
   "end_elevation_m": 71.45003206806335,
   "min_gradient_pct": -1.2046655302635259
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.165072548683,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 326.0,
   "end_distance_m": 376.0,
   "start_elevation_m": 52.28694470372216,
   "end_elevation_m": 61.36948097806366,
   "min_gradient_pct": 0.7876786570543857
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.216167897390385,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 284.0,
   "end_distance_m": 384.0,
   "start_elevation_m": 45.569013658901106,
   "end_elevation_m": 62.78518155629149,
   "min_gradient_pct": 2.0549135915830874
  }
 ],
 "shape": {
  "ascent_concentration": 0.401,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 237.0,
  "shape_class": "sustained"
 },
 "length_m": 841.6933123052639,
 "start_elevation_m": 11.191405420303504,
 "end_elevation_m": 91.385411510544,
 "endpoint_gain_m": 80.19400609024049,
 "overall_gradient_pct": 9.52769909393742,
 "accumulated_ascent_m": 82.83380352751932,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 33.252995795904496,
   "start_distance_m": 368.0,
   "end_distance_m": 373.0,
   "midpoint_distance_m": 370.5,
   "start_elevation_m": 58.901260875927946,
   "end_elevation_m": 60.56391066572317,
   "start_xy": [
    253868.2355895908,
    55787.51257819677
   ],
   "end_xy": [
    253863.2548098785,
    55787.07459765995
   ]
  },
  "max_10m": {
   "gradient_pct": 28.748821610952508,
   "start_distance_m": 368.0,
   "end_distance_m": 378.0,
   "midpoint_distance_m": 373.0,
   "start_elevation_m": 58.901260875927946,
   "end_elevation_m": 61.776143037023196,
   "start_xy": [
    253868.2355895908,
    55787.51257819677
   ],
   "end_xy": [
    253858.273216101,
    55786.64904333568
   ]
  },
  "max_20m": {
   "gradient_pct": 23.623386359741616,
   "start_distance_m": 424.0,
   "end_distance_m": 444.0,
   "midpoint_distance_m": 434.0,
   "start_elevation_m": 66.72535479611503,
   "end_elevation_m": 71.45003206806335,
   "start_xy": [
    253812.29580293124,
    55785.20937589087
   ],
   "end_xy": [
    253792.44446629423,
    55783.041194686804
   ]
  },
  "max_25m": {
   "gradient_pct": 21.767392599212318,
   "start_distance_m": 419.0,
   "end_distance_m": 444.0,
   "midpoint_distance_m": 431.5,
   "start_elevation_m": 66.00818391826027,
   "end_elevation_m": 71.45003206806335,
   "start_xy": [
    253817.293368046,
    55785.365384794226
   ],
   "end_xy": [
    253792.44446629423,
    55783.041194686804
   ]
  },
  "max_50m": {
   "gradient_pct": 18.165072548683,
   "start_distance_m": 326.0,
   "end_distance_m": 376.0,
   "midpoint_distance_m": 351.0,
   "start_elevation_m": 52.28694470372216,
   "end_elevation_m": 61.36948097806366,
   "start_xy": [
    253909.790773063,
    55792.95749236374
   ],
   "end_xy": [
    253860.26633986458,
    55786.811833903834
   ]
  },
  "max_100m": {
   "gradient_pct": 17.216167897390385,
   "start_distance_m": 284.0,
   "end_distance_m": 384.0,
   "midpoint_distance_m": 334.0,
   "start_elevation_m": 45.569013658901106,
   "end_elevation_m": 62.78518155629149,
   "start_xy": [
    253950.63777940124,
    55802.72995165427
   ],
   "end_xy": [
    253852.276420388,
    55786.45438641845
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.867859049353342,
   "start_distance_m": 669.0,
   "end_distance_m": 674.0,
   "midpoint_distance_m": 671.5,
   "start_elevation_m": 85.31257284672807,
   "end_elevation_m": 84.7191798942604,
   "start_xy": [
    253617.93180415785,
    55661.33219375157
   ],
   "end_xy": [
    253615.32389071523,
    55657.066488423545
   ]
  },
  "min_10m": {
   "gradient_pct": -5.953809470456974,
   "start_distance_m": 664.0,
   "end_distance_m": 674.0,
   "midpoint_distance_m": 669.0,
   "start_elevation_m": 85.3145608413061,
   "end_elevation_m": 84.7191798942604,
   "start_xy": [
    253620.49434796724,
    55665.6245156998
   ],
   "end_xy": [
    253615.32389071523,
    55657.066488423545
   ]
  },
  "min_20m": {
   "gradient_pct": -2.170416571188909,
   "start_distance_m": 655.0,
   "end_distance_m": 675.0,
   "midpoint_distance_m": 665.0,
   "start_elevation_m": 85.16562463897253,
   "end_elevation_m": 84.73154132473475,
   "start_xy": [
    253623.93166065228,
    55673.940637899796
   ],
   "end_xy": [
    253614.76337621632,
    55656.238406843244
   ]
  },
  "min_25m": {
   "gradient_pct": -1.2046655302635259,
   "start_distance_m": 650.0,
   "end_distance_m": 675.0,
   "midpoint_distance_m": 662.5,
   "start_elevation_m": 85.03270770730063,
   "end_elevation_m": 84.73154132473475,
   "start_xy": [
    253625.82579823758,
    55678.56797405807
   ],
   "end_xy": [
    253614.76337621632,
    55656.238406843244
   ]
  },
  "min_50m": {
   "gradient_pct": 0.7876786570543857,
   "start_distance_m": 625.0,
   "end_distance_m": 675.0,
   "midpoint_distance_m": 650.0,
   "start_elevation_m": 84.33770199620756,
   "end_elevation_m": 84.73154132473475,
   "start_xy": [
    253636.07668314123,
    55701.13593172607
   ],
   "end_xy": [
    253614.76337621632,
    55656.238406843244
   ]
  },
  "min_100m": {
   "gradient_pct": 2.0549135915830874,
   "start_distance_m": 575.0,
   "end_distance_m": 675.0,
   "midpoint_distance_m": 625.0,
   "start_elevation_m": 82.67662773315166,
   "end_elevation_m": 84.73154132473475,
   "start_xy": [
    253674.66254995982,
    55732.85859892425
   ],
   "end_xy": [
    253614.76337621632,
    55656.238406843244
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 43.547599945538806,
   "start_distance_m": 375.0,
   "end_distance_m": 377.0,
   "midpoint_distance_m": 376.0,
   "start_elevation_m": 60.87917734863579,
   "end_elevation_m": 61.75012934754657,
   "start_xy": [
    253861.26248362073,
    55786.89956883396
   ],
   "end_xy": [
    253859.27015736295,
    55786.72454000798
   ]
  },
  "max_3m": {
   "gradient_pct": 36.88814363486633,
   "start_distance_m": 370.0,
   "end_distance_m": 373.0,
   "midpoint_distance_m": 371.5,
   "start_elevation_m": 59.45726635667718,
   "end_elevation_m": 60.56391066572317,
   "start_xy": [
    253866.24326333302,
    55787.337549370786
   ],
   "end_xy": [
    253863.2548098785,
    55787.07459765995
   ]
  }
 },
 "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": 0.203,
   "obstruction_max_height_m": 17.23,
   "flagged_windows_m": [
    2,
    20,
    25,
    100
   ]
  },
  "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/SX5055.tif"
  ],
  "calculated_at": "2026-09-11T23:22:01+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-uk-england/batch-england-rchunk01.pbf",
  "osm_snapshot": "",
  "run_id": "texture-uk-england-260911",
  "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": [
   "SX5055.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Plympton St Maurice",
  "county": "City of Plymouth"
 }
}