{
 "ocl_version": "0.1.0",
 "name": "South Woodchester to Littleworth",
 "slug": "discovered-lane-51-7149-2-2215",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.253937977033303,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 156.0,
   "end_distance_m": 158.0,
   "start_elevation_m": 61.578519315598456,
   "end_elevation_m": 62.08359807513912,
   "min_gradient_pct": -32.79894625251103
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.003495595077595,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 155.0,
   "end_distance_m": 158.0,
   "start_elevation_m": 61.363493207286794,
   "end_elevation_m": 62.08359807513912,
   "min_gradient_pct": -28.680544511694468
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.14234934298355,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 483.0,
   "end_distance_m": 488.0,
   "start_elevation_m": 105.92462187096095,
   "end_elevation_m": 107.08173933811013,
   "min_gradient_pct": -21.181762871515843
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.806435835321537,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 478.0,
   "end_distance_m": 488.0,
   "start_elevation_m": 104.80109575457797,
   "end_elevation_m": 107.08173933811013,
   "min_gradient_pct": -9.90291757141705
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.560341651407043,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 477.0,
   "end_distance_m": 497.0,
   "start_elevation_m": 104.57977389035841,
   "end_elevation_m": 109.09184222063982,
   "min_gradient_pct": -4.2277878341995745
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.35688164990569,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 472.0,
   "end_distance_m": 497.0,
   "start_elevation_m": 103.5026218081634,
   "end_elevation_m": 109.09184222063982,
   "min_gradient_pct": -3.8273910031884952
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.828824743494664,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 457.0,
   "end_distance_m": 507.0,
   "start_elevation_m": 100.35614448570728,
   "end_elevation_m": 111.27055685745461,
   "min_gradient_pct": -2.664242147091727
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.49377236044741,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 428.0,
   "end_distance_m": 528.0,
   "start_elevation_m": 94.88006350120772,
   "end_elevation_m": 115.37383586165512,
   "min_gradient_pct": -1.2183226118556263
  }
 ],
 "shape": {
  "ascent_concentration": 0.389,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 194.0,
  "shape_class": "sustained"
 },
 "length_m": 1513.9052700487068,
 "start_elevation_m": 47.48046825015961,
 "end_elevation_m": 201.06153221539307,
 "endpoint_gain_m": 153.58106396523345,
 "overall_gradient_pct": 10.144694453721817,
 "accumulated_ascent_m": 155.87607079595847,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.14234934298355,
   "start_distance_m": 483.0,
   "end_distance_m": 488.0,
   "midpoint_distance_m": 485.5,
   "start_elevation_m": 105.92462187096095,
   "end_elevation_m": 107.08173933811013,
   "start_xy": [
    384434.18497115135,
    201821.97590309562
   ],
   "end_xy": [
    384439.1192104509,
    201822.78415916217
   ]
  },
  "max_10m": {
   "gradient_pct": 22.806435835321537,
   "start_distance_m": 478.0,
   "end_distance_m": 488.0,
   "midpoint_distance_m": 483.0,
   "start_elevation_m": 104.80109575457797,
   "end_elevation_m": 107.08173933811013,
   "start_xy": [
    384429.25082226703,
    201821.1670954481
   ],
   "end_xy": [
    384439.1192104509,
    201822.78415916217
   ]
  },
  "max_20m": {
   "gradient_pct": 22.560341651407043,
   "start_distance_m": 477.0,
   "end_distance_m": 497.0,
   "midpoint_distance_m": 487.0,
   "start_elevation_m": 104.57977389035841,
   "end_elevation_m": 109.09184222063982,
   "start_xy": [
    384428.2639012054,
    201821.00589168599
   ],
   "end_xy": [
    384448.000828476,
    201824.23909646718
   ]
  },
  "max_25m": {
   "gradient_pct": 22.35688164990569,
   "start_distance_m": 472.0,
   "end_distance_m": 497.0,
   "midpoint_distance_m": 484.5,
   "start_elevation_m": 103.5026218081634,
   "end_elevation_m": 109.09184222063982,
   "start_xy": [
    384423.32975233236,
    201820.19708396945
   ],
   "end_xy": [
    384448.000828476,
    201824.23909646718
   ]
  },
  "max_50m": {
   "gradient_pct": 21.828824743494664,
   "start_distance_m": 457.0,
   "end_distance_m": 507.0,
   "midpoint_distance_m": 482.0,
   "start_elevation_m": 100.35614448570728,
   "end_elevation_m": 111.27055685745461,
   "start_xy": [
    384408.52706437267,
    201817.77213518578
   ],
   "end_xy": [
    384457.8692168173,
    201825.8561602071
   ]
  },
  "max_100m": {
   "gradient_pct": 20.49377236044741,
   "start_distance_m": 428.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 478.0,
   "start_elevation_m": 94.88006350120772,
   "end_elevation_m": 115.37383586165512,
   "start_xy": [
    384379.7835316874,
    201813.96104612536
   ],
   "end_xy": [
    384478.3460434451,
    201830.36482738695
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -21.181762871515843,
   "start_distance_m": 1058.0,
   "end_distance_m": 1063.0,
   "midpoint_distance_m": 1060.5,
   "start_elevation_m": 156.9607935445952,
   "end_elevation_m": 155.9017054010194,
   "start_xy": [
    384913.9275330987,
    201911.7068981415
   ],
   "end_xy": [
    384918.6032423071,
    201913.45530011732
   ]
  },
  "min_10m": {
   "gradient_pct": -9.90291757141705,
   "start_distance_m": 1054.0,
   "end_distance_m": 1064.0,
   "midpoint_distance_m": 1059.0,
   "start_elevation_m": 156.91045270537688,
   "end_elevation_m": 155.92016094823518,
   "start_xy": [
    384910.3919684685,
    201909.8361281389
   ],
   "end_xy": [
    384919.5516925051,
    201913.77222629127
   ]
  },
  "min_20m": {
   "gradient_pct": -4.2277878341995745,
   "start_distance_m": 1043.0,
   "end_distance_m": 1063.0,
   "midpoint_distance_m": 1053.0,
   "start_elevation_m": 156.7472629678593,
   "end_elevation_m": 155.9017054010194,
   "start_xy": [
    384900.8872035414,
    201904.3625328281
   ],
   "end_xy": [
    384918.6032423071,
    201913.45530011732
   ]
  },
  "min_25m": {
   "gradient_pct": -3.8273910031884952,
   "start_distance_m": 1038.0,
   "end_distance_m": 1063.0,
   "midpoint_distance_m": 1050.5,
   "start_elevation_m": 156.85855315181652,
   "end_elevation_m": 155.9017054010194,
   "start_xy": [
    384897.0636637531,
    201901.1406489634
   ],
   "end_xy": [
    384918.6032423071,
    201913.45530011732
   ]
  },
  "min_50m": {
   "gradient_pct": -2.664242147091727,
   "start_distance_m": 1013.0,
   "end_distance_m": 1063.0,
   "midpoint_distance_m": 1038.0,
   "start_elevation_m": 157.23382647456526,
   "end_elevation_m": 155.9017054010194,
   "start_xy": [
    384878.4320334732,
    201884.4919767554
   ],
   "end_xy": [
    384918.6032423071,
    201913.45530011732
   ]
  },
  "min_100m": {
   "gradient_pct": -1.2183226118556263,
   "start_distance_m": 963.0,
   "end_distance_m": 1063.0,
   "midpoint_distance_m": 1013.0,
   "start_elevation_m": 157.12002801287503,
   "end_elevation_m": 155.9017054010194,
   "start_xy": [
    384840.77259639284,
    201851.80972128583
   ],
   "end_xy": [
    384918.6032423071,
    201913.45530011732
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.253937977033303,
   "start_distance_m": 156.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 157.0,
   "start_elevation_m": 61.578519315598456,
   "end_elevation_m": 62.08359807513912,
   "start_xy": [
    384240.72564717487,
    201987.05902947043
   ],
   "end_xy": [
    384240.7826524156,
    201985.05984229926
   ]
  },
  "max_3m": {
   "gradient_pct": 24.003495595077595,
   "start_distance_m": 155.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 156.5,
   "start_elevation_m": 61.363493207286794,
   "end_elevation_m": 62.08359807513912,
   "start_xy": [
    384240.69763479754,
    201988.05863704675
   ],
   "end_xy": [
    384240.7826524156,
    201985.05984229926
   ]
  }
 },
 "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": 0.036,
   "obstruction_max_height_m": 15.26,
   "flagged_windows_m": [
    2,
    3
   ]
  },
  "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/SO8000.tif",
   "data/cache/england/bulk_dtm_1m/SO8500.tif"
  ],
  "calculated_at": "2026-08-19T18:24:22+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": [
   "SO8000.tif",
   "SO8500.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 16.8% over 200 m (Terrain 50), gain 116.8 m over 1163 m way. EXTENDED by graph walk: +4 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): discovered-lane-51-7150-2-2236 ADOPTED (England launch slice 2026-08-16): clean-steep,endurance. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (51.7149, -2.2215)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (51.7149, -2.2215)'"
 },
 "area": {
  "place": "Woodchester",
  "county": "Gloucestershire"
 }
}