{
 "ocl_version": "0.1.0",
 "name": "Booth House Lane",
 "slug": "booth-house-lane",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 41.301318319240465,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 108.0,
   "end_distance_m": 110.0,
   "start_elevation_m": 197.54901969961603,
   "end_elevation_m": 198.37504606600083,
   "min_gradient_pct": -37.71312546369643,
   "suppressed_max_gradient_pct": 50.278637930409786,
   "suppressed_location_m": [
    290.0,
    292.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 39.73351255790855,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 107.0,
   "end_distance_m": 110.0,
   "start_elevation_m": 197.18304068926358,
   "end_elevation_m": 198.37504606600083,
   "min_gradient_pct": -32.60669202378684,
   "suppressed_max_gradient_pct": 42.76986239222159,
   "suppressed_location_m": [
    290.0,
    293.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 35.48469075093408,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 105.0,
   "end_distance_m": 110.0,
   "start_elevation_m": 196.60081152845413,
   "end_elevation_m": 198.37504606600083,
   "min_gradient_pct": -23.26266734400349
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.980541795969316,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 100.0,
   "end_distance_m": 110.0,
   "start_elevation_m": 195.5769918864039,
   "end_elevation_m": 198.37504606600083,
   "min_gradient_pct": -14.727679668843052
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.907260711820584,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 90.0,
   "end_distance_m": 110.0,
   "start_elevation_m": 193.59359392363672,
   "end_elevation_m": 198.37504606600083,
   "min_gradient_pct": -6.329151195157721
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.40425771420064,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 85.0,
   "end_distance_m": 110.0,
   "start_elevation_m": 192.52398163745067,
   "end_elevation_m": 198.37504606600083,
   "min_gradient_pct": -4.337333276776576
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.9546505684458,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 60.0,
   "end_distance_m": 110.0,
   "start_elevation_m": 188.39772078177793,
   "end_elevation_m": 198.37504606600083,
   "min_gradient_pct": -2.5854832079286325
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.592092214240438,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 27.0,
   "end_distance_m": 127.0,
   "start_elevation_m": 183.40576033833926,
   "end_elevation_m": 199.9978525525797,
   "min_gradient_pct": -2.26308214463711
  }
 ],
 "shape": {
  "ascent_concentration": 0.351,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 134.0,
  "shape_class": "sustained"
 },
 "length_m": 2162.808652479947,
 "start_elevation_m": 184.40868832885764,
 "end_elevation_m": 335.5028833833002,
 "endpoint_gain_m": 151.09419505444254,
 "overall_gradient_pct": 6.986017689599725,
 "accumulated_ascent_m": 162.4600328093348,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 35.48469075093408,
   "start_distance_m": 105.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 107.5,
   "start_elevation_m": 196.60081152845413,
   "end_elevation_m": 198.37504606600083,
   "start_xy": [
    412863.11077220563,
    407730.59564090945
   ],
   "end_xy": [
    412865.3120467238,
    407726.10627675673
   ]
  },
  "max_10m": {
   "gradient_pct": 27.980541795969316,
   "start_distance_m": 100.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 105.0,
   "start_elevation_m": 195.5769918864039,
   "end_elevation_m": 198.37504606600083,
   "start_xy": [
    412860.90236728283,
    407735.0814208361
   ],
   "end_xy": [
    412865.3120467238,
    407726.10627675673
   ]
  },
  "max_20m": {
   "gradient_pct": 23.907260711820584,
   "start_distance_m": 90.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 100.0,
   "start_elevation_m": 193.59359392363672,
   "end_elevation_m": 198.37504606600083,
   "start_xy": [
    412856.4141082943,
    407744.01460231136
   ],
   "end_xy": [
    412865.3120467238,
    407726.10627675673
   ]
  },
  "max_25m": {
   "gradient_pct": 23.40425771420064,
   "start_distance_m": 85.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 97.5,
   "start_elevation_m": 192.52398163745067,
   "end_elevation_m": 198.37504606600083,
   "start_xy": [
    412854.41066476103,
    407748.59567358444
   ],
   "end_xy": [
    412865.3120467238,
    407726.10627675673
   ]
  },
  "max_50m": {
   "gradient_pct": 19.9546505684458,
   "start_distance_m": 60.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 85.0,
   "start_elevation_m": 188.39772078177793,
   "end_elevation_m": 198.37504606600083,
   "start_xy": [
    412843.55051989,
    407771.0832146312
   ],
   "end_xy": [
    412865.3120467238,
    407726.10627675673
   ]
  },
  "max_100m": {
   "gradient_pct": 16.592092214240438,
   "start_distance_m": 27.0,
   "end_distance_m": 127.0,
   "midpoint_distance_m": 77.0,
   "start_elevation_m": 183.40576033833926,
   "end_elevation_m": 199.9978525525797,
   "start_xy": [
    412819.5210602897,
    407793.20628015354
   ],
   "end_xy": [
    412872.9416383463,
    407710.9177859282
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -23.26266734400349,
   "start_distance_m": 13.0,
   "end_distance_m": 18.0,
   "midpoint_distance_m": 15.5,
   "start_elevation_m": 184.2949922497736,
   "end_elevation_m": 183.13185888257343,
   "start_xy": [
    412808.10710219067,
    407801.29827320616
   ],
   "end_xy": [
    412812.3068314024,
    407798.58694416936
   ]
  },
  "min_10m": {
   "gradient_pct": -14.727679668843052,
   "start_distance_m": 7.0,
   "end_distance_m": 17.0,
   "midpoint_distance_m": 12.0,
   "start_elevation_m": 184.6715905773708,
   "end_elevation_m": 183.1988226104865,
   "start_xy": [
    412805.5351332413,
    407805.25443006394
   ],
   "end_xy": [
    412811.48104109755,
    407799.1496605717
   ]
  },
  "min_20m": {
   "gradient_pct": -6.329151195157721,
   "start_distance_m": 7.0,
   "end_distance_m": 27.0,
   "midpoint_distance_m": 17.0,
   "start_elevation_m": 184.6715905773708,
   "end_elevation_m": 183.40576033833926,
   "start_xy": [
    412805.5351332413,
    407805.25443006394
   ],
   "end_xy": [
    412819.5210602897,
    407793.20628015354
   ]
  },
  "min_25m": {
   "gradient_pct": -4.337333276776576,
   "start_distance_m": 2.0,
   "end_distance_m": 27.0,
   "midpoint_distance_m": 14.5,
   "start_elevation_m": 184.4900936575334,
   "end_elevation_m": 183.40576033833926,
   "start_xy": [
    412807.6228952118,
    407809.79769430397
   ],
   "end_xy": [
    412819.5210602897,
    407793.20628015354
   ]
  },
  "min_50m": {
   "gradient_pct": -2.5854832079286325,
   "start_distance_m": 2049.0,
   "end_distance_m": 2099.0,
   "midpoint_distance_m": 2074.0,
   "start_elevation_m": 332.4968035076233,
   "end_elevation_m": 331.204061903659,
   "start_xy": [
    411477.463224454,
    407925.13763238
   ],
   "end_xy": [
    411432.23238468525,
    407946.1555657071
   ]
  },
  "min_100m": {
   "gradient_pct": -2.26308214463711,
   "start_distance_m": 1999.0,
   "end_distance_m": 2099.0,
   "midpoint_distance_m": 2049.0,
   "start_elevation_m": 333.4671440482961,
   "end_elevation_m": 331.204061903659,
   "start_xy": [
    411523.9605493674,
    407906.75288936024
   ],
   "end_xy": [
    411432.23238468525,
    407946.1555657071
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 41.301318319240465,
   "start_distance_m": 108.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 109.0,
   "start_elevation_m": 197.54901969961603,
   "end_elevation_m": 198.37504606600083,
   "start_xy": [
    412864.4315369165,
    407727.9020224178
   ],
   "end_xy": [
    412865.3120467238,
    407726.10627675673
   ]
  },
  "max_3m": {
   "gradient_pct": 39.73351255790855,
   "start_distance_m": 107.0,
   "end_distance_m": 110.0,
   "midpoint_distance_m": 108.5,
   "start_elevation_m": 197.18304068926358,
   "end_elevation_m": 198.37504606600083,
   "start_xy": [
    412863.9912820129,
    407728.7998952484
   ],
   "end_xy": [
    412865.3120467238,
    407726.10627675673
   ]
  }
 },
 "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": 0.019,
   "obstruction_max_height_m": 8.68,
   "flagged_windows_m": []
  },
  "structure_suppression": {
   "masked_fraction": 0.003,
   "windows_resited": [
    2.0,
    3.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    289.0,
    294.0
   ]
  ],
  "review": [],
  "extent": [
   "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/SE1005.tif"
  ],
  "calculated_at": "2026-08-15T19:05:01+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": [
   "SE1005.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.2% over 200 m (Terrain 50), gain 48.0 m over 594 m way. EXTENDED by graph walk: +1 segment(s) at base, +6 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. DEDUPE: absorbed 1 overlapping proposal(s): mellor-lane"
 },
 "area": {
  "place": "Lip Hill Clough",
  "county": ""
 }
}