{
 "ocl_version": "0.1.0",
 "name": "Redesmouth to Woodcock Hill",
 "slug": "discovered-lane-55-1344-2-2119",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.36345034860673,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 2.0,
   "end_distance_m": 4.0,
   "start_elevation_m": 105.07927964345245,
   "end_elevation_m": 105.88654865042459,
   "min_gradient_pct": -69.15247566982217,
   "suppressed_max_gradient_pct": 109.74678781338127,
   "suppressed_location_m": [
    364.0,
    366.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.211629195355066,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 1.0,
   "end_distance_m": 4.0,
   "start_elevation_m": 104.77019977456393,
   "end_elevation_m": 105.88654865042459,
   "min_gradient_pct": -67.66803094948368,
   "suppressed_max_gradient_pct": 107.39668239725783,
   "suppressed_location_m": [
    364.0,
    367.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.872550197587316,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "start_elevation_m": 104.4677634078736,
   "end_elevation_m": 106.11139091775297,
   "min_gradient_pct": -59.63124584459564,
   "suppressed_max_gradient_pct": 97.29939187313704,
   "suppressed_location_m": [
    363.0,
    368.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.288939898390424,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "start_elevation_m": 104.4677634078736,
   "end_elevation_m": 107.09665739771265,
   "min_gradient_pct": -43.68201358360608,
   "suppressed_max_gradient_pct": 57.17029685215692,
   "suppressed_location_m": [
    360.0,
    370.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.966282873016155,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 217.0,
   "end_distance_m": 237.0,
   "start_elevation_m": 115.4143139285375,
   "end_elevation_m": 120.00757050314073,
   "min_gradient_pct": -25.243243792315866,
   "suppressed_max_gradient_pct": 28.96087173154868,
   "suppressed_location_m": [
    360.0,
    380.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.143061319194658,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 213.0,
   "end_distance_m": 238.0,
   "start_elevation_m": 114.64859133281641,
   "end_elevation_m": 120.18435666261507,
   "min_gradient_pct": -19.430659533004928,
   "suppressed_max_gradient_pct": 23.48227462047953,
   "suppressed_location_m": [
    360.0,
    385.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.363168558176653,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 211.0,
   "end_distance_m": 261.0,
   "start_elevation_m": 114.29480695982195,
   "end_elevation_m": 123.97639123891028,
   "min_gradient_pct": -7.989440025839201
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.740400840908862,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 194.0,
   "end_distance_m": 294.0,
   "start_elevation_m": 112.34575000303947,
   "end_elevation_m": 128.08615084394833,
   "min_gradient_pct": -1.8916108268071525
  }
 ],
 "shape": {
  "ascent_concentration": 0.378,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 169.0,
  "shape_class": "sustained"
 },
 "length_m": 2389.0658645905132,
 "start_elevation_m": 104.4677634078736,
 "end_elevation_m": 221.63073916558756,
 "endpoint_gain_m": 117.16297575771395,
 "overall_gradient_pct": 4.90413334744104,
 "accumulated_ascent_m": 130.67207520694305,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.872550197587316,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 104.4677634078736,
   "end_elevation_m": 106.11139091775297,
   "start_xy": [
    386289.541,
    582324.585
   ],
   "end_xy": [
    386293.87430114666,
    582322.2069584474
   ]
  },
  "max_10m": {
   "gradient_pct": 26.288939898390424,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 104.4677634078736,
   "end_elevation_m": 107.09665739771265,
   "start_xy": [
    386289.541,
    582324.585
   ],
   "end_xy": [
    386298.7643055738,
    582321.1639575058
   ]
  },
  "max_20m": {
   "gradient_pct": 22.966282873016155,
   "start_distance_m": 217.0,
   "end_distance_m": 237.0,
   "midpoint_distance_m": 227.0,
   "start_elevation_m": 115.4143139285375,
   "end_elevation_m": 120.00757050314073,
   "start_xy": [
    386502.692246529,
    582307.5579073959
   ],
   "end_xy": [
    386522.68203491,
    582307.5328875959
   ]
  },
  "max_25m": {
   "gradient_pct": 22.143061319194658,
   "start_distance_m": 213.0,
   "end_distance_m": 238.0,
   "midpoint_distance_m": 225.5,
   "start_elevation_m": 114.64859133281641,
   "end_elevation_m": 120.18435666261507,
   "start_xy": [
    386498.693959546,
    582307.4408688268
   ],
   "end_xy": [
    386523.68122254015,
    582307.4940052488
   ]
  },
  "max_50m": {
   "gradient_pct": 19.363168558176653,
   "start_distance_m": 211.0,
   "end_distance_m": 261.0,
   "midpoint_distance_m": 236.0,
   "start_elevation_m": 114.29480695982195,
   "end_elevation_m": 123.97639123891028,
   "start_xy": [
    386496.6948303063,
    582307.3818659448
   ],
   "end_xy": [
    386544.06470422255,
    582297.5110173919
   ]
  },
  "max_100m": {
   "gradient_pct": 15.740400840908862,
   "start_distance_m": 194.0,
   "end_distance_m": 294.0,
   "midpoint_distance_m": 244.0,
   "start_elevation_m": 112.34575000303947,
   "end_elevation_m": 128.08615084394833,
   "start_xy": [
    386479.81982054375,
    582305.4709882974
   ],
   "end_xy": [
    386559.69311901386,
    582269.7952289628
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -59.63124584459564,
   "start_distance_m": 348.0,
   "end_distance_m": 353.0,
   "midpoint_distance_m": 350.5,
   "start_elevation_m": 129.22656931880172,
   "end_elevation_m": 126.24500702657194,
   "start_xy": [
    386600.9283131334,
    582235.6178368819
   ],
   "end_xy": [
    386604.83504062047,
    582232.4973435458
   ]
  },
  "min_10m": {
   "gradient_pct": -43.68201358360608,
   "start_distance_m": 347.0,
   "end_distance_m": 357.0,
   "midpoint_distance_m": 352.0,
   "start_elevation_m": 129.7313962348606,
   "end_elevation_m": 125.36319487649999,
   "start_xy": [
    386600.14670730825,
    582236.2416095136
   ],
   "end_xy": [
    386607.9608128528,
    582230.0014376183
   ]
  },
  "min_20m": {
   "gradient_pct": -25.243243792315866,
   "start_distance_m": 340.0,
   "end_distance_m": 360.0,
   "midpoint_distance_m": 350.0,
   "start_elevation_m": 129.91366131157983,
   "end_elevation_m": 124.86501255311666,
   "start_xy": [
    386594.6772138074,
    582240.6102053507
   ],
   "end_xy": [
    386610.30497942585,
    582228.1293045303
   ]
  },
  "min_25m": {
   "gradient_pct": -19.430659533004928,
   "start_distance_m": 335.0,
   "end_distance_m": 360.0,
   "midpoint_distance_m": 347.5,
   "start_elevation_m": 129.7226774363679,
   "end_elevation_m": 124.86501255311666,
   "start_xy": [
    386590.7704862341,
    582243.7306985786
   ],
   "end_xy": [
    386610.30497942585,
    582228.1293045303
   ]
  },
  "min_50m": {
   "gradient_pct": -7.989440025839201,
   "start_distance_m": 310.0,
   "end_distance_m": 360.0,
   "midpoint_distance_m": 335.0,
   "start_elevation_m": 128.85973256603626,
   "end_elevation_m": 124.86501255311666,
   "start_xy": [
    386570.8680645723,
    582258.8553358925
   ],
   "end_xy": [
    386610.30497942585,
    582228.1293045303
   ]
  },
  "min_100m": {
   "gradient_pct": -1.8916108268071525,
   "start_distance_m": 473.0,
   "end_distance_m": 573.0,
   "midpoint_distance_m": 523.0,
   "start_elevation_m": 134.96151043798102,
   "end_elevation_m": 133.06989961117387,
   "start_xy": [
    386701.3679502679,
    582162.0733027331
   ],
   "end_xy": [
    386790.6672335221,
    582117.1103649895
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.36345034860673,
   "start_distance_m": 2.0,
   "end_distance_m": 4.0,
   "midpoint_distance_m": 3.0,
   "start_elevation_m": 105.07927964345245,
   "end_elevation_m": 105.88654865042459,
   "start_xy": [
    386291.1923744934,
    582323.4567438393
   ],
   "end_xy": [
    386292.8963788401,
    582322.4159272213
   ]
  },
  "max_3m": {
   "gradient_pct": 37.211629195355066,
   "start_distance_m": 1.0,
   "end_distance_m": 4.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 104.77019977456393,
   "end_elevation_m": 105.88654865042459,
   "start_xy": [
    386290.3668464069,
    582324.0211048747
   ],
   "end_xy": [
    386292.8963788401,
    582322.4159272213
   ]
  }
 },
 "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": 0.063,
   "obstruction_max_height_m": 16.0,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.013,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    341.0,
    372.0
   ]
  ],
  "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/NY8580.tif"
  ],
  "calculated_at": "2026-08-19T18:32:45+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": [
   "NY8580.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 11.8% over 200 m (Terrain 50), gain 88.3 m over 1461 m way. EXTENDED by graph walk: +0 segment(s) at base, +1 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. AUTO-NAMED from gazetteer (hypothesis, unreviewed): was 'Discovered lane (55.1344, -2.2119)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (55.1344, -2.2119)'"
 },
 "area": {
  "place": "Redesmouth",
  "county": "Northumberland"
 }
}