{
 "ocl_version": "0.1.0",
 "name": "Steway Lane",
 "slug": "steway-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.9398047274633,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1150.0,
   "end_distance_m": 1152.0,
   "start_elevation_m": 111.01042393426471,
   "end_elevation_m": 111.70922002881397,
   "min_gradient_pct": -13.096992982410427
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.005338170050855,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1149.0,
   "end_distance_m": 1152.0,
   "start_elevation_m": 110.74905988371245,
   "end_elevation_m": 111.70922002881397,
   "min_gradient_pct": -12.355412372471145
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.89275276725732,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1148.0,
   "end_distance_m": 1153.0,
   "start_elevation_m": 110.53072124923672,
   "end_elevation_m": 111.92535888759959,
   "min_gradient_pct": -11.52591849280185
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.33974749337665,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1143.0,
   "end_distance_m": 1153.0,
   "start_elevation_m": 109.49138413826192,
   "end_elevation_m": 111.92535888759959,
   "min_gradient_pct": -9.86036664742997
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.247155330548054,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1133.0,
   "end_distance_m": 1153.0,
   "start_elevation_m": 107.47592782148998,
   "end_elevation_m": 111.92535888759959,
   "min_gradient_pct": -8.23521658558299
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.647214908609104,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1127.0,
   "end_distance_m": 1152.0,
   "start_elevation_m": 106.2974163016617,
   "end_elevation_m": 111.70922002881397,
   "min_gradient_pct": -7.4951189399931195
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.551737007095085,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1102.0,
   "end_distance_m": 1152.0,
   "start_elevation_m": 101.43335152526643,
   "end_elevation_m": 111.70922002881397,
   "min_gradient_pct": -5.9940927281048175
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.903215314582837,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1054.0,
   "end_distance_m": 1154.0,
   "start_elevation_m": 94.11240349085676,
   "end_elevation_m": 112.0156188054396,
   "min_gradient_pct": -4.740205380376892
  }
 ],
 "shape": {
  "ascent_concentration": 0.452,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 217.0,
  "shape_class": "stepped"
 },
 "length_m": 2234.455933946177,
 "start_elevation_m": 31.451494763625725,
 "end_elevation_m": 188.91123908032202,
 "endpoint_gain_m": 157.4597443166963,
 "overall_gradient_pct": 7.046894142083767,
 "accumulated_ascent_m": 167.98833399369832,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.89275276725732,
   "start_distance_m": 1148.0,
   "end_distance_m": 1153.0,
   "midpoint_distance_m": 1150.5,
   "start_elevation_m": 110.53072124923672,
   "end_elevation_m": 111.92535888759959,
   "start_xy": [
    378877.5989699596,
    168953.17942925662
   ],
   "end_xy": [
    378880.13603363826,
    168957.4879449976
   ]
  },
  "max_10m": {
   "gradient_pct": 24.33974749337665,
   "start_distance_m": 1143.0,
   "end_distance_m": 1153.0,
   "midpoint_distance_m": 1148.0,
   "start_elevation_m": 109.49138413826192,
   "end_elevation_m": 111.92535888759959,
   "start_xy": [
    378875.06190628087,
    168948.87091351565
   ],
   "end_xy": [
    378880.13603363826,
    168957.4879449976
   ]
  },
  "max_20m": {
   "gradient_pct": 22.247155330548054,
   "start_distance_m": 1133.0,
   "end_distance_m": 1153.0,
   "midpoint_distance_m": 1143.0,
   "start_elevation_m": 107.47592782148998,
   "end_elevation_m": 111.92535888759959,
   "start_xy": [
    378869.98777892353,
    168940.2538820337
   ],
   "end_xy": [
    378880.13603363826,
    168957.4879449976
   ]
  },
  "max_25m": {
   "gradient_pct": 21.647214908609104,
   "start_distance_m": 1127.0,
   "end_distance_m": 1152.0,
   "midpoint_distance_m": 1139.5,
   "start_elevation_m": 106.2974163016617,
   "end_elevation_m": 111.70922002881397,
   "start_xy": [
    378866.9433025091,
    168935.0836631445
   ],
   "end_xy": [
    378879.62862090254,
    168956.62624184942
   ]
  },
  "max_50m": {
   "gradient_pct": 20.551737007095085,
   "start_distance_m": 1102.0,
   "end_distance_m": 1152.0,
   "midpoint_distance_m": 1127.0,
   "start_elevation_m": 101.43335152526643,
   "end_elevation_m": 111.70922002881397,
   "start_xy": [
    378855.40167800017,
    168912.92732644838
   ],
   "end_xy": [
    378879.62862090254,
    168956.62624184942
   ]
  },
  "max_100m": {
   "gradient_pct": 17.903215314582837,
   "start_distance_m": 1054.0,
   "end_distance_m": 1154.0,
   "midpoint_distance_m": 1104.0,
   "start_elevation_m": 94.11240349085676,
   "end_elevation_m": 112.0156188054396,
   "start_xy": [
    378840.6131199615,
    168867.7241077554
   ],
   "end_xy": [
    378880.643446374,
    168958.3496481458
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.52591849280185,
   "start_distance_m": 725.0,
   "end_distance_m": 730.0,
   "midpoint_distance_m": 727.5,
   "start_elevation_m": 82.42628175686066,
   "end_elevation_m": 81.84998583222057,
   "start_xy": [
    378652.50005840464,
    168631.39977066763
   ],
   "end_xy": [
    378656.7197795345,
    168634.08192532134
   ]
  },
  "min_10m": {
   "gradient_pct": -9.86036664742997,
   "start_distance_m": 725.0,
   "end_distance_m": 735.0,
   "midpoint_distance_m": 730.0,
   "start_elevation_m": 82.42628175686066,
   "end_elevation_m": 81.44024509211766,
   "start_xy": [
    378652.50005840464,
    168631.39977066763
   ],
   "end_xy": [
    378660.9395006643,
    168636.76407997505
   ]
  },
  "min_20m": {
   "gradient_pct": -8.23521658558299,
   "start_distance_m": 725.0,
   "end_distance_m": 745.0,
   "midpoint_distance_m": 735.0,
   "start_elevation_m": 82.42628175686066,
   "end_elevation_m": 80.77923843974406,
   "start_xy": [
    378652.50005840464,
    168631.39977066763
   ],
   "end_xy": [
    378669.47428882914,
    168641.9742037567
   ]
  },
  "min_25m": {
   "gradient_pct": -7.4951189399931195,
   "start_distance_m": 725.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 737.5,
   "start_elevation_m": 82.42628175686066,
   "end_elevation_m": 80.55250202186238,
   "start_xy": [
    378652.50005840464,
    168631.39977066763
   ],
   "end_xy": [
    378673.7590919462,
    168644.55111319394
   ]
  },
  "min_50m": {
   "gradient_pct": -5.9940927281048175,
   "start_distance_m": 725.0,
   "end_distance_m": 775.0,
   "midpoint_distance_m": 750.0,
   "start_elevation_m": 82.42628175686066,
   "end_elevation_m": 79.42923539280825,
   "start_xy": [
    378652.50005840464,
    168631.39977066763
   ],
   "end_xy": [
    378695.1831075316,
    168657.4356603803
   ]
  },
  "min_100m": {
   "gradient_pct": -4.740205380376892,
   "start_distance_m": 711.0,
   "end_distance_m": 811.0,
   "midpoint_distance_m": 761.0,
   "start_elevation_m": 82.75983284489124,
   "end_elevation_m": 78.01962746451434,
   "start_xy": [
    378640.6848392411,
    168623.88973763725
   ],
   "end_xy": [
    378726.0336899746,
    168675.9894083286
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.9398047274633,
   "start_distance_m": 1150.0,
   "end_distance_m": 1152.0,
   "midpoint_distance_m": 1151.0,
   "start_elevation_m": 111.01042393426471,
   "end_elevation_m": 111.70922002881397,
   "start_xy": [
    378878.61379543104,
    168954.90283555302
   ],
   "end_xy": [
    378879.62862090254,
    168956.62624184942
   ]
  },
  "max_3m": {
   "gradient_pct": 32.005338170050855,
   "start_distance_m": 1149.0,
   "end_distance_m": 1152.0,
   "midpoint_distance_m": 1150.5,
   "start_elevation_m": 110.74905988371245,
   "end_elevation_m": 111.70922002881397,
   "start_xy": [
    378878.1063826953,
    168954.04113240482
   ],
   "end_xy": [
    378879.62862090254,
    168956.62624184942
   ]
  }
 },
 "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": 0.1,
   "obstruction_max_height_m": 12.73,
   "flagged_windows_m": [
    2,
    5,
    10
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "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/ST7565.tif"
  ],
  "calculated_at": "2026-09-05T00:09:42+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/root/uk-climbs/data/cache/pbf/england-2026-08-27.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "hunt-england-260905",
  "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": [
   "ST7565.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Batheaston",
  "county": "Bath and North East Somerset"
 }
}