{
 "ocl_version": "0.1.0",
 "name": "Streatley Hill",
 "slug": "streatley-hill",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.845289208027566,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 394.0,
   "end_distance_m": 396.0,
   "start_elevation_m": 108.12925025157695,
   "end_elevation_m": 108.8861560357375,
   "min_gradient_pct": -5.894493649533672
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.29206796631996,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 394.0,
   "end_distance_m": 397.0,
   "start_elevation_m": 108.12925025157695,
   "end_elevation_m": 109.18801229056655,
   "min_gradient_pct": -2.3418429543326624
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 30.580887732775466,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 393.0,
   "end_distance_m": 398.0,
   "start_elevation_m": 107.889594282119,
   "end_elevation_m": 109.41863866875778,
   "min_gradient_pct": 0.385054060024288
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.116887667916558,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 390.0,
   "end_distance_m": 400.0,
   "start_elevation_m": 107.43797052091622,
   "end_elevation_m": 109.84965928770788,
   "min_gradient_pct": 2.7203728800000704
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 19.77483256701362,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 380.0,
   "end_distance_m": 400.0,
   "start_elevation_m": 105.89469277430516,
   "end_elevation_m": 109.84965928770788,
   "min_gradient_pct": 6.0588282221267775
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 19.12804979047712,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 375.0,
   "end_distance_m": 400.0,
   "start_elevation_m": 105.0676468400886,
   "end_elevation_m": 109.84965928770788,
   "min_gradient_pct": 6.794808627814689,
   "lateral_min_pct": 17.46,
   "lateral_max_pct": 23.1
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.77673370329643,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 638.0,
   "end_distance_m": 688.0,
   "start_elevation_m": 144.1812340360796,
   "end_elevation_m": 153.0696008877278,
   "min_gradient_pct": 7.106864171133395
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.856612615133855,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 596.0,
   "end_distance_m": 696.0,
   "start_elevation_m": 137.49806692910866,
   "end_elevation_m": 154.35467954424252,
   "min_gradient_pct": 7.582197167439176
  }
 ],
 "shape": {
  "ascent_concentration": 0.314,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 262.0,
  "shape_class": "sustained"
 },
 "length_m": 768.7767743444534,
 "start_elevation_m": 64.90192893695726,
 "end_elevation_m": 160.4257837677004,
 "endpoint_gain_m": 95.52385483074315,
 "overall_gradient_pct": 12.42543453685859,
 "accumulated_ascent_m": 96.22635859395149,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 30.580887732775466,
   "start_distance_m": 393.0,
   "end_distance_m": 398.0,
   "midpoint_distance_m": 395.5,
   "start_elevation_m": 107.889594282119,
   "end_elevation_m": 109.41863866875778,
   "start_xy": [
    458632.7731769573,
    180807.7598391411
   ],
   "end_xy": [
    458628.12265106,
    180805.92337273018
   ]
  },
  "max_10m": {
   "gradient_pct": 24.116887667916558,
   "start_distance_m": 390.0,
   "end_distance_m": 400.0,
   "midpoint_distance_m": 395.0,
   "start_elevation_m": 107.43797052091622,
   "end_elevation_m": 109.84965928770788,
   "start_xy": [
    458635.5634924957,
    180808.86171898764
   ],
   "end_xy": [
    458626.262440701,
    180805.1887861658
   ]
  },
  "max_20m": {
   "gradient_pct": 19.77483256701362,
   "start_distance_m": 380.0,
   "end_distance_m": 400.0,
   "midpoint_distance_m": 390.0,
   "start_elevation_m": 105.89469277430516,
   "end_elevation_m": 109.84965928770788,
   "start_xy": [
    458644.8645442903,
    180812.5346518095
   ],
   "end_xy": [
    458626.262440701,
    180805.1887861658
   ]
  },
  "max_25m": {
   "gradient_pct": 19.12804979047712,
   "start_distance_m": 375.0,
   "end_distance_m": 400.0,
   "midpoint_distance_m": 387.5,
   "start_elevation_m": 105.0676468400886,
   "end_elevation_m": 109.84965928770788,
   "start_xy": [
    458649.51507018757,
    180814.3711182204
   ],
   "end_xy": [
    458626.262440701,
    180805.1887861658
   ]
  },
  "max_50m": {
   "gradient_pct": 17.77673370329643,
   "start_distance_m": 638.0,
   "end_distance_m": 688.0,
   "midpoint_distance_m": 663.0,
   "start_elevation_m": 144.1812340360796,
   "end_elevation_m": 153.0696008877278,
   "start_xy": [
    458417.58460071153,
    180692.95720274854
   ],
   "end_xy": [
    458370.99122773483,
    180675.0973282013
   ]
  },
  "max_100m": {
   "gradient_pct": 16.856612615133855,
   "start_distance_m": 596.0,
   "end_distance_m": 696.0,
   "midpoint_distance_m": 646.0,
   "start_elevation_m": 137.49806692910866,
   "end_elevation_m": 154.35467954424252,
   "start_xy": [
    458455.0328324673,
    180711.87191211706
   ],
   "end_xy": [
    458363.3470379899,
    180672.7380140756
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.385054060024288,
   "start_distance_m": 217.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 219.5,
   "start_elevation_m": 83.7356473540946,
   "end_elevation_m": 83.75490005709581,
   "start_xy": [
    458807.08173722087,
    180815.16042770987
   ],
   "end_xy": [
    458802.1630805248,
    180816.05865724984
   ]
  },
  "min_10m": {
   "gradient_pct": 2.7203728800000704,
   "start_distance_m": 213.0,
   "end_distance_m": 223.0,
   "midpoint_distance_m": 218.0,
   "start_elevation_m": 83.55725472928137,
   "end_elevation_m": 83.82929201728138,
   "start_xy": [
    458811.0166625777,
    180814.44184407787
   ],
   "end_xy": [
    458801.1793491856,
    180816.23830315785
   ]
  },
  "min_20m": {
   "gradient_pct": 6.0588282221267775,
   "start_distance_m": 747.0,
   "end_distance_m": 767.0,
   "midpoint_distance_m": 757.0,
   "start_elevation_m": 159.07118267551826,
   "end_elevation_m": 160.2829483199436,
   "start_xy": [
    458314.21422716125,
    180659.12386119706
   ],
   "end_xy": [
    458294.82088007755,
    180654.2352940357
   ]
  },
  "min_25m": {
   "gradient_pct": 6.794808627814689,
   "start_distance_m": 18.0,
   "end_distance_m": 43.0,
   "midpoint_distance_m": 30.5,
   "start_elevation_m": 66.21249034335824,
   "end_elevation_m": 67.91119250031191,
   "start_xy": [
    459002.81292295054,
    180779.30395370006
   ],
   "end_xy": [
    458978.1433714929,
    180783.35527828353
   ]
  },
  "min_50m": {
   "gradient_pct": 7.106864171133395,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 64.90192893695726,
   "end_elevation_m": 68.45536102252396,
   "start_xy": [
    459020.575,
    180776.387
   ],
   "end_xy": [
    458971.28266262833,
    180784.74035216877
   ]
  },
  "min_100m": {
   "gradient_pct": 7.582197167439176,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 64.90192893695726,
   "end_elevation_m": 72.48412610439644,
   "start_xy": [
    459020.575,
    180776.387
   ],
   "end_xy": [
    458922.1783039082,
    180794.1418564742
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.845289208027566,
   "start_distance_m": 394.0,
   "end_distance_m": 396.0,
   "midpoint_distance_m": 395.0,
   "start_elevation_m": 108.12925025157695,
   "end_elevation_m": 108.8861560357375,
   "start_xy": [
    458631.84307177784,
    180807.39254585892
   ],
   "end_xy": [
    458629.9828614189,
    180806.65795929453
   ]
  },
  "max_3m": {
   "gradient_pct": 35.29206796631996,
   "start_distance_m": 394.0,
   "end_distance_m": 397.0,
   "midpoint_distance_m": 395.5,
   "start_elevation_m": 108.12925025157695,
   "end_elevation_m": 109.18801229056655,
   "start_xy": [
    458631.84307177784,
    180807.39254585892
   ],
   "end_xy": [
    458629.0527562394,
    180806.29066601236
   ]
  }
 },
 "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": 0.13,
   "obstruction_max_height_m": 12.18,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ],
  "lateral_stability": {
   "offsets_m": [
    -1.0,
    -0.5,
    0.0,
    0.5,
    1.0
   ],
   "windows": [
    {
     "window_m": 25,
     "min_pct": 17.46,
     "max_pct": 23.1
    },
    {
     "window_m": 10,
     "min_pct": 20.28,
     "max_pct": 28.19
    },
    {
     "window_m": 5,
     "min_pct": 27.07,
     "max_pct": 37.49
    }
   ]
  }
 },
 "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/SU5580.tif"
  ],
  "calculated_at": "2026-08-15T11:12:20+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",
  "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": [
   "SU5580.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Streatley",
  "county": "West Berkshire"
 }
}