{
 "ocl_version": "0.1.0",
 "name": "Hollins",
 "slug": "hollins",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.41921908962158,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 295.0,
   "end_distance_m": 297.0,
   "start_elevation_m": 123.95492813660525,
   "end_elevation_m": 124.64331251839768,
   "min_gradient_pct": -8.2391536961822
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.351528993311224,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 295.0,
   "end_distance_m": 298.0,
   "start_elevation_m": 123.95492813660525,
   "end_elevation_m": 124.89547400640458,
   "min_gradient_pct": -7.925451272429503
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.11279075526477,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 293.0,
   "end_distance_m": 298.0,
   "start_elevation_m": 123.53983446864135,
   "end_elevation_m": 124.89547400640458,
   "min_gradient_pct": -7.389182068034756
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.875192682563465,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 288.0,
   "end_distance_m": 298.0,
   "start_elevation_m": 122.60795473814824,
   "end_elevation_m": 124.89547400640458,
   "min_gradient_pct": -6.775488435418424
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.64053733116907,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 292.0,
   "end_distance_m": 312.0,
   "start_elevation_m": 123.36803480768394,
   "end_elevation_m": 127.49614227391776,
   "min_gradient_pct": -5.969348628067479
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.15461124867653,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 287.0,
   "end_distance_m": 312.0,
   "start_elevation_m": 122.45748946174862,
   "end_elevation_m": 127.49614227391776,
   "min_gradient_pct": -5.4491665867523125
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.88890308723083,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 262.0,
   "end_distance_m": 312.0,
   "start_elevation_m": 118.55169073030234,
   "end_elevation_m": 127.49614227391776,
   "min_gradient_pct": -3.3372571377842633
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.45638745666065,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 268.0,
   "end_distance_m": 368.0,
   "start_elevation_m": 119.53873415641499,
   "end_elevation_m": 135.99512161307564,
   "min_gradient_pct": 0.5727253280871736
  }
 ],
 "shape": {
  "ascent_concentration": 0.337,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 120.0,
  "shape_class": "sustained"
 },
 "length_m": 1559.7780397839379,
 "start_elevation_m": 111.3072688089907,
 "end_elevation_m": 228.10907469644047,
 "endpoint_gain_m": 116.80180588744977,
 "overall_gradient_pct": 7.488360709555142,
 "accumulated_ascent_m": 119.72333838829024,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.11279075526477,
   "start_distance_m": 293.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 295.5,
   "start_elevation_m": 123.53983446864135,
   "end_elevation_m": 124.89547400640458,
   "start_xy": [
    409058.1669899887,
    488692.1950360102
   ],
   "end_xy": [
    409061.98273195885,
    488688.9647041854
   ]
  },
  "max_10m": {
   "gradient_pct": 22.875192682563465,
   "start_distance_m": 288.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 293.0,
   "start_elevation_m": 122.60795473814824,
   "end_elevation_m": 124.89547400640458,
   "start_xy": [
    409055.76839686756,
    488696.58127463516
   ],
   "end_xy": [
    409061.98273195885,
    488688.9647041854
   ]
  },
  "max_20m": {
   "gradient_pct": 20.64053733116907,
   "start_distance_m": 292.0,
   "end_distance_m": 312.0,
   "midpoint_distance_m": 302.0,
   "start_elevation_m": 123.36803480768394,
   "end_elevation_m": 127.49614227391776,
   "start_xy": [
    409057.6845059639,
    488693.0700746633
   ],
   "end_xy": [
    409072.6000884528,
    488679.863471354
   ]
  },
  "max_25m": {
   "gradient_pct": 20.15461124867653,
   "start_distance_m": 287.0,
   "end_distance_m": 312.0,
   "midpoint_distance_m": 299.5,
   "start_elevation_m": 122.45748946174862,
   "end_elevation_m": 127.49614227391776,
   "start_xy": [
    409055.28947468614,
    488697.4591319949
   ],
   "end_xy": [
    409072.6000884528,
    488679.863471354
   ]
  },
  "max_50m": {
   "gradient_pct": 17.88890308723083,
   "start_distance_m": 262.0,
   "end_distance_m": 312.0,
   "midpoint_distance_m": 287.0,
   "start_elevation_m": 118.55169073030234,
   "end_elevation_m": 127.49614227391776,
   "start_xy": [
    409048.8537411725,
    488721.1483098595
   ],
   "end_xy": [
    409072.6000884528,
    488679.863471354
   ]
  },
  "max_100m": {
   "gradient_pct": 16.45638745666065,
   "start_distance_m": 268.0,
   "end_distance_m": 368.0,
   "midpoint_distance_m": 318.0,
   "start_elevation_m": 119.53873415641499,
   "end_elevation_m": 135.99512161307564,
   "start_xy": [
    409049.20218473434,
    488715.1992613953
   ],
   "end_xy": [
    409108.65988841606,
    488637.3296618514
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.389182068034756,
   "start_distance_m": 1456.0,
   "end_distance_m": 1461.0,
   "midpoint_distance_m": 1458.5,
   "start_elevation_m": 225.58265136194828,
   "end_elevation_m": 225.21319225854654,
   "start_xy": [
    409064.71646602097,
    487607.6452011662
   ],
   "end_xy": [
    409063.10935791465,
    487602.93065570743
   ]
  },
  "min_10m": {
   "gradient_pct": -6.775488435418424,
   "start_distance_m": 1451.0,
   "end_distance_m": 1461.0,
   "midpoint_distance_m": 1456.0,
   "start_elevation_m": 225.89074110208838,
   "end_elevation_m": 225.21319225854654,
   "start_xy": [
    409067.16430079925,
    487612.00502917747
   ],
   "end_xy": [
    409063.10935791465,
    487602.93065570743
   ]
  },
  "min_20m": {
   "gradient_pct": -5.969348628067479,
   "start_distance_m": 1447.0,
   "end_distance_m": 1467.0,
   "midpoint_distance_m": 1457.0,
   "start_elevation_m": 226.1334074061088,
   "end_elevation_m": 224.9395376804953,
   "start_xy": [
    409069.12230624666,
    487615.49303887156
   ],
   "end_xy": [
    409061.59951370093,
    487597.13537627313
   ]
  },
  "min_25m": {
   "gradient_pct": -5.4491665867523125,
   "start_distance_m": 1447.0,
   "end_distance_m": 1472.0,
   "midpoint_distance_m": 1459.5,
   "start_elevation_m": 226.1334074061088,
   "end_elevation_m": 224.77111575942072,
   "start_xy": [
    409069.12230624666,
    487615.49303887156
   ],
   "end_xy": [
    409061.0794543552,
    487592.16249603214
   ]
  },
  "min_50m": {
   "gradient_pct": -3.3372571377842633,
   "start_distance_m": 1440.0,
   "end_distance_m": 1490.0,
   "midpoint_distance_m": 1465.0,
   "start_elevation_m": 226.17019301938853,
   "end_elevation_m": 224.5015644504964,
   "start_xy": [
    409073.54113078327,
    487620.9201776175
   ],
   "end_xy": [
    409064.41135832254,
    487574.68884427473
   ]
  },
  "min_100m": {
   "gradient_pct": 0.5727253280871736,
   "start_distance_m": 65.0,
   "end_distance_m": 165.0,
   "midpoint_distance_m": 115.0,
   "start_elevation_m": 112.17108200619404,
   "end_elevation_m": 112.74380733428121,
   "start_xy": [
    409019.8870867844,
    488915.41222284955
   ],
   "end_xy": [
    409038.20940939867,
    488817.2226554782
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.41921908962158,
   "start_distance_m": 295.0,
   "end_distance_m": 297.0,
   "midpoint_distance_m": 296.0,
   "start_elevation_m": 123.95492813660525,
   "end_elevation_m": 124.64331251839768,
   "start_xy": [
    409059.6799544389,
    488690.88751849567
   ],
   "end_xy": [
    409061.21540557046,
    488689.6059609249
   ]
  },
  "max_3m": {
   "gradient_pct": 31.351528993311224,
   "start_distance_m": 295.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 296.5,
   "start_elevation_m": 123.95492813660525,
   "end_elevation_m": 124.89547400640458,
   "start_xy": [
    409059.6799544389,
    488690.88751849567
   ],
   "end_xy": [
    409061.98273195885,
    488688.9647041854
   ]
  }
 },
 "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": 0.094,
   "obstruction_max_height_m": 11.26,
   "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/SE0585.tif"
  ],
  "calculated_at": "2026-08-19T18:37:17+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": [
   "SE0585.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 10.9% over 200 m (Terrain 50), gain 80.0 m over 945 m way. EXTENDED by graph walk: +1 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 1 overlapping proposal(s): gale-bank ADOPTED (England launch slice 2026-08-16): clean-steep."
 },
 "area": {
  "place": "Wensley",
  "county": "North Yorkshire"
 }
}