{
 "ocl_version": "0.1.0",
 "name": "The Batch",
 "slug": "the-batch",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.896480456692416,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 287.0,
   "end_distance_m": 289.0,
   "start_elevation_m": 105.09446784675718,
   "end_elevation_m": 105.59239745589103,
   "min_gradient_pct": -7.258444758760163
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.38948310883357,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 287.0,
   "end_distance_m": 290.0,
   "start_elevation_m": 105.09446784675718,
   "end_elevation_m": 105.82615234002219,
   "min_gradient_pct": -5.029650608290126
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.51632938371722,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 285.0,
   "end_distance_m": 290.0,
   "start_elevation_m": 104.65033587083633,
   "end_elevation_m": 105.82615234002219,
   "min_gradient_pct": -2.7885022834368556
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.14989858551499,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 285.0,
   "end_distance_m": 295.0,
   "start_elevation_m": 104.65033587083633,
   "end_elevation_m": 106.96532572938783,
   "min_gradient_pct": -1.4389565430116136
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.678889236774253,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 275.0,
   "end_distance_m": 295.0,
   "start_elevation_m": 102.42954788203298,
   "end_elevation_m": 106.96532572938783,
   "min_gradient_pct": -0.39030013451011314
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.40421625879645,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 275.0,
   "end_distance_m": 300.0,
   "start_elevation_m": 102.42954788203298,
   "end_elevation_m": 108.03060194673209,
   "min_gradient_pct": -0.07850970224791354
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.718997121052013,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 253.0,
   "end_distance_m": 303.0,
   "start_elevation_m": 98.19520441770723,
   "end_elevation_m": 108.55470297823324,
   "min_gradient_pct": 1.368159116377825
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.568721514105164,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 201.0,
   "end_distance_m": 301.0,
   "start_elevation_m": 91.64949180653169,
   "end_elevation_m": 108.21821332063685,
   "min_gradient_pct": 2.7397302849715146
  }
 ],
 "shape": {
  "ascent_concentration": 0.444,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 119.0,
  "shape_class": "sustained"
 },
 "length_m": 461.5763437167404,
 "start_elevation_m": 73.11356086118974,
 "end_elevation_m": 115.41636448943987,
 "endpoint_gain_m": 42.30280362825013,
 "overall_gradient_pct": 9.164855219315672,
 "accumulated_ascent_m": 43.00672975569785,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.51632938371722,
   "start_distance_m": 285.0,
   "end_distance_m": 290.0,
   "midpoint_distance_m": 287.5,
   "start_elevation_m": 104.65033587083633,
   "end_elevation_m": 105.82615234002219,
   "start_xy": [
    351621.6677590449,
    161891.84191157247
   ],
   "end_xy": [
    351626.334026144,
    161893.63800362492
   ]
  },
  "max_10m": {
   "gradient_pct": 23.14989858551499,
   "start_distance_m": 285.0,
   "end_distance_m": 295.0,
   "midpoint_distance_m": 290.0,
   "start_elevation_m": 104.65033587083633,
   "end_elevation_m": 106.96532572938783,
   "start_xy": [
    351621.6677590449,
    161891.84191157247
   ],
   "end_xy": [
    351631.120706992,
    161895.0453130608
   ]
  },
  "max_20m": {
   "gradient_pct": 22.678889236774253,
   "start_distance_m": 275.0,
   "end_distance_m": 295.0,
   "midpoint_distance_m": 285.0,
   "start_elevation_m": 102.42954788203298,
   "end_elevation_m": 106.96532572938783,
   "start_xy": [
    351612.56871353247,
    161887.81498534567
   ],
   "end_xy": [
    351631.120706992,
    161895.0453130608
   ]
  },
  "max_25m": {
   "gradient_pct": 22.40421625879645,
   "start_distance_m": 275.0,
   "end_distance_m": 300.0,
   "midpoint_distance_m": 287.5,
   "start_elevation_m": 102.42954788203298,
   "end_elevation_m": 108.03060194673209,
   "start_xy": [
    351612.56871353247,
    161887.81498534567
   ],
   "end_xy": [
    351635.98660484795,
    161896.19554694035
   ]
  },
  "max_50m": {
   "gradient_pct": 20.718997121052013,
   "start_distance_m": 253.0,
   "end_distance_m": 303.0,
   "midpoint_distance_m": 278.0,
   "start_elevation_m": 98.19520441770723,
   "end_elevation_m": 108.55470297823324,
   "start_xy": [
    351594.7346812678,
    161874.93293647122
   ],
   "end_xy": [
    351638.90598010406,
    161896.88637761967
   ]
  },
  "max_100m": {
   "gradient_pct": 16.568721514105164,
   "start_distance_m": 201.0,
   "end_distance_m": 301.0,
   "midpoint_distance_m": 251.0,
   "start_elevation_m": 91.64949180653169,
   "end_elevation_m": 108.21821332063685,
   "start_xy": [
    351552.5270294983,
    161844.77968387402
   ],
   "end_xy": [
    351636.9596190206,
    161896.4262922659
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.7885022834368556,
   "start_distance_m": 360.0,
   "end_distance_m": 365.0,
   "midpoint_distance_m": 362.5,
   "start_elevation_m": 112.43084215117992,
   "end_elevation_m": 112.29141703700807,
   "start_xy": [
    351684.8748406501,
    161928.0087924117
   ],
   "end_xy": [
    351688.59432267724,
    161931.3502659557
   ]
  },
  "min_10m": {
   "gradient_pct": -1.4389565430116136,
   "start_distance_m": 371.0,
   "end_distance_m": 381.0,
   "midpoint_distance_m": 376.0,
   "start_elevation_m": 112.46998428237896,
   "end_elevation_m": 112.3260886280778,
   "start_xy": [
    351693.05741725874,
    161935.36035100283
   ],
   "end_xy": [
    351701.0654716624,
    161941.315804477
   ]
  },
  "min_20m": {
   "gradient_pct": -0.39030013451011314,
   "start_distance_m": 360.0,
   "end_distance_m": 380.0,
   "midpoint_distance_m": 370.0,
   "start_elevation_m": 112.43084215117992,
   "end_elevation_m": 112.3527821242779,
   "start_xy": [
    351684.8748406501,
    161928.0087924117
   ],
   "end_xy": [
    351700.2348212669,
    161940.75901016322
   ]
  },
  "min_25m": {
   "gradient_pct": -0.07850970224791354,
   "start_distance_m": 359.0,
   "end_distance_m": 384.0,
   "midpoint_distance_m": 371.5,
   "start_elevation_m": 112.41117618641944,
   "end_elevation_m": 112.39154876085746,
   "start_xy": [
    351684.1307513541,
    161927.34071223726
   ],
   "end_xy": [
    351703.5576279432,
    161942.98588058288
   ]
  },
  "min_50m": {
   "gradient_pct": 1.368159116377825,
   "start_distance_m": 333.0,
   "end_distance_m": 383.0,
   "midpoint_distance_m": 358.0,
   "start_elevation_m": 111.66013099815389,
   "end_elevation_m": 112.3442105563428,
   "start_xy": [
    351665.82271413296,
    161908.91367552307
   ],
   "end_xy": [
    351702.7269642939,
    161942.42910603093
   ]
  },
  "min_100m": {
   "gradient_pct": 2.7397302849715146,
   "start_distance_m": 353.0,
   "end_distance_m": 453.0,
   "midpoint_distance_m": 403.0,
   "start_elevation_m": 112.13112913406367,
   "end_elevation_m": 114.87085941903518,
   "start_xy": [
    351679.6676567093,
    161923.33062726053
   ],
   "end_xy": [
    351765.45769380033,
    161972.8335852302
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.896480456692416,
   "start_distance_m": 287.0,
   "end_distance_m": 289.0,
   "midpoint_distance_m": 288.0,
   "start_elevation_m": 105.09446784675718,
   "end_elevation_m": 105.59239745589103,
   "start_xy": [
    351623.5344760149,
    161892.55980266808
   ],
   "end_xy": [
    351625.40105471184,
    161893.27805326504
   ]
  },
  "max_3m": {
   "gradient_pct": 24.38948310883357,
   "start_distance_m": 287.0,
   "end_distance_m": 290.0,
   "midpoint_distance_m": 288.5,
   "start_elevation_m": 105.09446784675718,
   "end_elevation_m": 105.82615234002219,
   "start_xy": [
    351623.5344760149,
    161892.55980266808
   ],
   "end_xy": [
    351626.334026144,
    161893.63800362492
   ]
  }
 },
 "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": 0.054,
   "obstruction_max_height_m": 9.02,
   "flagged_windows_m": []
  },
  "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/ST5060.tif"
  ],
  "calculated_at": "2026-08-19T18:49:26+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12.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": [
   "ST5060.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 13.4% over 200 m (Terrain 50), gain 31.3 m over 332 m way. EXTENDED by graph walk: +2 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (England launch slice 2026-08-16): clean-steep."
 },
 "area": {
  "place": "Butcombe",
  "county": "North Somerset"
 }
}