{
 "ocl_version": "0.1.0",
 "name": "Pylle Hill",
 "slug": "pylle-hill",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.281279999586985,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 982.0,
   "end_distance_m": 984.0,
   "start_elevation_m": 102.50009688614888,
   "end_elevation_m": 103.10572248614062,
   "min_gradient_pct": -34.23731144652322,
   "suppressed_max_gradient_pct": 58.100459359772216,
   "suppressed_location_m": [
    9.0,
    11.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.345571914510856,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 724.0,
   "end_distance_m": 727.0,
   "start_elevation_m": 70.01161133110044,
   "end_elevation_m": 70.77197848853577,
   "min_gradient_pct": -29.85172006834323,
   "suppressed_max_gradient_pct": 47.490268170944226,
   "suppressed_location_m": [
    10.0,
    13.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.886022922262498,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 723.0,
   "end_distance_m": 728.0,
   "start_elevation_m": 69.87412617335973,
   "end_elevation_m": 70.96842731947285,
   "min_gradient_pct": -20.699625873317018,
   "suppressed_max_gradient_pct": 39.57276630459063,
   "suppressed_location_m": [
    970.0,
    975.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 18.486862617677673,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1004.0,
   "end_distance_m": 1014.0,
   "start_elevation_m": 103.23929397311025,
   "end_elevation_m": 105.08798023487802,
   "min_gradient_pct": -7.144292991624184,
   "suppressed_max_gradient_pct": 30.2388528252375,
   "suppressed_location_m": [
    968.0,
    978.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 15.995273342257335,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1003.0,
   "end_distance_m": 1023.0,
   "start_elevation_m": 103.12241718485683,
   "end_elevation_m": 106.3214718533083,
   "min_gradient_pct": -2.6857257766513953,
   "suppressed_max_gradient_pct": 25.265892894618034,
   "suppressed_location_m": [
    911.0,
    931.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 15.502890454634212,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1004.0,
   "end_distance_m": 1029.0,
   "start_elevation_m": 103.23929397311025,
   "end_elevation_m": 107.1150165867688,
   "min_gradient_pct": -2.3344147138612357,
   "suppressed_max_gradient_pct": 24.103358984564064,
   "suppressed_location_m": [
    857.0,
    882.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 12.935610601235396,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1004.0,
   "end_distance_m": 1054.0,
   "start_elevation_m": 103.23929397311025,
   "end_elevation_m": 109.70709927372795,
   "min_gradient_pct": -1.6208556339772144,
   "suppressed_max_gradient_pct": 21.117899702075366,
   "suppressed_location_m": [
    848.0,
    898.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 11.014768152931879,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 999.0,
   "end_distance_m": 1099.0,
   "start_elevation_m": 102.78237976396555,
   "end_elevation_m": 113.79714791689743,
   "min_gradient_pct": -1.0052813872377797,
   "suppressed_max_gradient_pct": 18.720753305750364,
   "suppressed_location_m": [
    850.0,
    950.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.518,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 67.0,
  "shape_class": "stepped"
 },
 "length_m": 1219.5813251433156,
 "start_elevation_m": 43.97336366836849,
 "end_elevation_m": 116.52047901919573,
 "endpoint_gain_m": 72.54711535082724,
 "overall_gradient_pct": 5.948526256935107,
 "accumulated_ascent_m": 79.79199728885033,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.886022922262498,
   "start_distance_m": 723.0,
   "end_distance_m": 728.0,
   "midpoint_distance_m": 725.5,
   "start_elevation_m": 69.87412617335973,
   "end_elevation_m": 70.96842731947285,
   "start_xy": [
    360718.5485440753,
    138139.5439982716
   ],
   "end_xy": [
    360720.3455158476,
    138134.87807142825
   ]
  },
  "max_10m": {
   "gradient_pct": 18.486862617677673,
   "start_distance_m": 1004.0,
   "end_distance_m": 1014.0,
   "midpoint_distance_m": 1009.0,
   "start_elevation_m": 103.23929397311025,
   "end_elevation_m": 105.08798023487802,
   "start_xy": [
    360731.2941267571,
    137867.44999645505
   ],
   "end_xy": [
    360729.85513789405,
    137857.55407302146
   ]
  },
  "max_20m": {
   "gradient_pct": 15.995273342257335,
   "start_distance_m": 1003.0,
   "end_distance_m": 1023.0,
   "midpoint_distance_m": 1013.0,
   "start_elevation_m": 103.12241718485683,
   "end_elevation_m": 106.3214718533083,
   "start_xy": [
    360731.43723419274,
    137868.43970361253
   ],
   "end_xy": [
    360728.5602305345,
    137848.64771526837
   ]
  },
  "max_25m": {
   "gradient_pct": 15.502890454634212,
   "start_distance_m": 1004.0,
   "end_distance_m": 1029.0,
   "midpoint_distance_m": 1016.5,
   "start_elevation_m": 103.23929397311025,
   "end_elevation_m": 107.1150165867688,
   "start_xy": [
    360731.2941267571,
    137867.44999645505
   ],
   "end_xy": [
    360727.69714425487,
    137842.71011675222
   ]
  },
  "max_50m": {
   "gradient_pct": 12.935610601235396,
   "start_distance_m": 1004.0,
   "end_distance_m": 1054.0,
   "midpoint_distance_m": 1029.0,
   "start_elevation_m": 103.23929397311025,
   "end_elevation_m": 109.70709927372795,
   "start_xy": [
    360731.2941267571,
    137867.44999645505
   ],
   "end_xy": [
    360724.10016175266,
    137817.97023704933
   ]
  },
  "max_100m": {
   "gradient_pct": 11.014768152931879,
   "start_distance_m": 999.0,
   "end_distance_m": 1099.0,
   "midpoint_distance_m": 1049.0,
   "start_elevation_m": 102.78237976396555,
   "end_elevation_m": 113.79714791689743,
   "start_xy": [
    360732.0131315332,
    137872.3980292907
   ],
   "end_xy": [
    360718.2882808206,
    137773.34919394203
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -20.699625873317018,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 43.97336366836849,
   "end_elevation_m": 42.93838237470264,
   "start_xy": [
    360597.621,
    138782.105
   ],
   "end_xy": [
    360599.0470927212,
    138777.31268800123
   ]
  },
  "min_10m": {
   "gradient_pct": -7.144292991624184,
   "start_distance_m": 979.0,
   "end_distance_m": 989.0,
   "midpoint_distance_m": 984.0,
   "start_elevation_m": 103.04983287181672,
   "end_elevation_m": 102.3354035726543,
   "start_xy": [
    360735.5347539203,
    137892.07513503812
   ],
   "end_xy": [
    360733.46019154444,
    137882.2927450386
   ]
  },
  "min_20m": {
   "gradient_pct": -2.6857257766513953,
   "start_distance_m": 1195.0,
   "end_distance_m": 1215.0,
   "midpoint_distance_m": 1205.0,
   "start_elevation_m": 117.04732775063005,
   "end_elevation_m": 116.51018259529977,
   "start_xy": [
    360711.58545772784,
    137677.60885630266
   ],
   "end_xy": [
    360704.3208369221,
    137659.10080760813
   ]
  },
  "min_25m": {
   "gradient_pct": -2.3344147138612357,
   "start_distance_m": 1191.0,
   "end_distance_m": 1216.0,
   "midpoint_distance_m": 1203.5,
   "start_elevation_m": 117.0814550678761,
   "end_elevation_m": 116.4978513894108,
   "start_xy": [
    360711.9325430704,
    137681.59376894348
   ],
   "end_xy": [
    360703.7629139547,
    137658.27091486802
   ]
  },
  "min_50m": {
   "gradient_pct": -1.6208556339772144,
   "start_distance_m": 153.0,
   "end_distance_m": 203.0,
   "midpoint_distance_m": 178.0,
   "start_elevation_m": 55.48110003061943,
   "end_elevation_m": 54.67067221363082,
   "start_xy": [
    360580.1463934699,
    138637.316137145
   ],
   "end_xy": [
    360542.8839261735,
    138604.34811534497
   ]
  },
  "min_100m": {
   "gradient_pct": -1.0052813872377797,
   "start_distance_m": 152.0,
   "end_distance_m": 252.0,
   "midpoint_distance_m": 202.0,
   "start_elevation_m": 55.50154927063769,
   "end_elevation_m": 54.49626788339991,
   "start_xy": [
    360580.721465646,
    138638.13423982335
   ],
   "end_xy": [
    360522.66701509024,
    138561.63532330908
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.281279999586985,
   "start_distance_m": 982.0,
   "end_distance_m": 984.0,
   "midpoint_distance_m": 983.0,
   "start_elevation_m": 102.50009688614888,
   "end_elevation_m": 103.10572248614062,
   "start_xy": [
    360734.9099149455,
    137889.14092775932
   ],
   "end_xy": [
    360734.492906965,
    137887.18488522383
   ]
  },
  "max_3m": {
   "gradient_pct": 25.345571914510856,
   "start_distance_m": 724.0,
   "end_distance_m": 727.0,
   "midpoint_distance_m": 725.5,
   "start_elevation_m": 70.01161133110044,
   "end_elevation_m": 70.77197848853577,
   "start_xy": [
    360718.90852805634,
    138138.61103978733
   ],
   "end_xy": [
    360719.98553186655,
    138135.81102991253
   ]
  }
 },
 "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": 0.037,
   "windows_resited": [
    2.0,
    3.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.062,
   "windows_resited": [
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.122,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 2,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 907.0,
     "end_m": 932.0,
     "raw_pct": 23.43,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 911.0,
     "end_m": 931.0,
     "raw_pct": 25.27,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 968.0,
     "end_m": 978.0,
     "raw_pct": 30.24,
     "reason": "hump+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 970.0,
     "end_m": 975.0,
     "raw_pct": 39.57,
     "reason": "hump"
    },
    {
     "window_m": 25.0,
     "start_m": 844.0,
     "end_m": 869.0,
     "raw_pct": 19.67,
     "reason": "mask-edge"
    },
    {
     "window_m": 20.0,
     "start_m": 849.0,
     "end_m": 869.0,
     "raw_pct": 21.22,
     "reason": "mask-edge"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.124,
   "obstruction_max_height_m": 25.25,
   "flagged_windows_m": [
    2,
    3,
    5
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    44.0
   ],
   [
    842.0,
    900.0
   ],
   [
    905.0,
    934.0
   ],
   [
    966.0,
    980.0
   ]
  ],
  "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/ST6035.tif"
  ],
  "calculated_at": "2026-09-12T01:39:08+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-uk-england/batch-england-rchunk03.pbf",
  "osm_snapshot": "",
  "run_id": "texture-uk-england-260912",
  "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": [
   "ST6035.tif"
  ],
  "climb_origin": "discovered",
  "mask_basin_extension_m": 12.0,
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Pylle",
  "county": "Somerset"
 }
}