{
 "ocl_version": "0.1.0",
 "name": "Gittisham to Westgate Hill",
 "slug": "discovered-lane-50-7680-3-2348",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.753747825575203,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 919.0,
   "end_distance_m": 921.0,
   "start_elevation_m": 214.85119088687418,
   "end_elevation_m": 215.40626584338568,
   "min_gradient_pct": -5.348566297708146,
   "suppressed_max_gradient_pct": 53.6948838740102,
   "suppressed_location_m": [
    969.0,
    971.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.84044478919994,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 918.0,
   "end_distance_m": 921.0,
   "start_elevation_m": 214.69105249970968,
   "end_elevation_m": 215.40626584338568,
   "min_gradient_pct": -4.1308846645563335,
   "suppressed_max_gradient_pct": 43.12674781263013,
   "suppressed_location_m": [
    968.0,
    971.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.80168354201976,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 916.0,
   "end_distance_m": 921.0,
   "start_elevation_m": 214.2661816662847,
   "end_elevation_m": 215.40626584338568,
   "min_gradient_pct": -4.04298197219191,
   "suppressed_max_gradient_pct": 37.24874441184852,
   "suppressed_location_m": [
    966.0,
    971.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 20.891817499073397,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 935.0,
   "end_distance_m": 945.0,
   "start_elevation_m": 218.04889865254654,
   "end_elevation_m": 220.13808040245388,
   "min_gradient_pct": -1.7264207079335847,
   "suppressed_max_gradient_pct": 29.419344327435795,
   "suppressed_location_m": [
    961.0,
    971.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.574340389724313,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 925.0,
   "end_distance_m": 945.0,
   "start_elevation_m": 216.02321232450902,
   "end_elevation_m": 220.13808040245388,
   "min_gradient_pct": -1.3030813242467332,
   "suppressed_max_gradient_pct": 23.696051660654263,
   "suppressed_location_m": [
    951.0,
    971.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.26311170167378,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 919.0,
   "end_distance_m": 944.0,
   "start_elevation_m": 214.85119088687418,
   "end_elevation_m": 219.91696881229262,
   "min_gradient_pct": -1.093687765436698,
   "suppressed_max_gradient_pct": 22.483153485695766,
   "suppressed_location_m": [
    946.0,
    971.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.50566710937028,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 916.0,
   "end_distance_m": 966.0,
   "start_elevation_m": 214.2661816662847,
   "end_elevation_m": 224.01901522096983,
   "min_gradient_pct": -0.7895001900504326,
   "suppressed_max_gradient_pct": 20.95037319635316,
   "suppressed_location_m": [
    921.0,
    971.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.542986393186823,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure",
    "structure_excluded"
   ],
   "start_distance_m": 866.0,
   "end_distance_m": 966.0,
   "start_elevation_m": 206.476028827783,
   "end_elevation_m": 224.01901522096983,
   "min_gradient_pct": -0.441944279987581,
   "suppressed_max_gradient_pct": 18.614009261531777,
   "suppressed_location_m": [
    871.0,
    971.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.42,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 238.0,
  "shape_class": "sustained"
 },
 "length_m": 1311.255799881552,
 "start_elevation_m": 124.19742776031427,
 "end_elevation_m": 234.13088697680854,
 "endpoint_gain_m": 109.93345921649427,
 "overall_gradient_pct": 8.383830159334643,
 "accumulated_ascent_m": 111.44802717514972,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.80168354201976,
   "start_distance_m": 916.0,
   "end_distance_m": 921.0,
   "midpoint_distance_m": 918.5,
   "start_elevation_m": 214.2661816662847,
   "end_elevation_m": 215.40626584338568,
   "start_xy": [
    313108.90741155844,
    97258.69746749583
   ],
   "end_xy": [
    313113.70959745604,
    97260.08100594231
   ]
  },
  "max_10m": {
   "gradient_pct": 20.891817499073397,
   "start_distance_m": 935.0,
   "end_distance_m": 945.0,
   "midpoint_distance_m": 940.0,
   "start_elevation_m": 218.04889865254654,
   "end_elevation_m": 220.13808040245388,
   "start_xy": [
    313127.2353878289,
    97261.64412437138
   ],
   "end_xy": [
    313136.6875402246,
    97258.73426144182
   ]
  },
  "max_20m": {
   "gradient_pct": 20.574340389724313,
   "start_distance_m": 925.0,
   "end_distance_m": 945.0,
   "midpoint_distance_m": 935.0,
   "start_elevation_m": 216.02321232450902,
   "end_elevation_m": 220.13808040245388,
   "start_xy": [
    313117.5679972765,
    97261.13587386913
   ],
   "end_xy": [
    313136.6875402246,
    97258.73426144182
   ]
  },
  "max_25m": {
   "gradient_pct": 20.26311170167378,
   "start_distance_m": 919.0,
   "end_distance_m": 944.0,
   "midpoint_distance_m": 931.5,
   "start_elevation_m": 214.85119088687418,
   "end_elevation_m": 219.91696881229262,
   "start_xy": [
    313111.7802447264,
    97259.55413119975
   ],
   "end_xy": [
    313135.92622186505,
    97259.32897948468
   ]
  },
  "max_50m": {
   "gradient_pct": 19.50566710937028,
   "start_distance_m": 916.0,
   "end_distance_m": 966.0,
   "midpoint_distance_m": 941.0,
   "start_elevation_m": 214.2661816662847,
   "end_elevation_m": 224.01901522096983,
   "start_xy": [
    313108.90741155844,
    97258.69746749583
   ],
   "end_xy": [
    313141.1701221735,
    97238.73124277008
   ]
  },
  "max_100m": {
   "gradient_pct": 17.542986393186823,
   "start_distance_m": 866.0,
   "end_distance_m": 966.0,
   "midpoint_distance_m": 916.0,
   "start_elevation_m": 206.476028827783,
   "end_elevation_m": 224.01901522096983,
   "start_xy": [
    313063.2741278173,
    97238.26321279001
   ],
   "end_xy": [
    313141.1701221735,
    97238.73124277008
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.04298197219191,
   "start_distance_m": 1265.0,
   "end_distance_m": 1270.0,
   "midpoint_distance_m": 1267.5,
   "start_elevation_m": 234.37033413221104,
   "end_elevation_m": 234.16818503360145,
   "start_xy": [
    313160.03571955854,
    96943.46411293324
   ],
   "end_xy": [
    313161.5237546879,
    96938.69067095284
   ]
  },
  "min_10m": {
   "gradient_pct": -1.7264207079335847,
   "start_distance_m": 1281.0,
   "end_distance_m": 1291.0,
   "midpoint_distance_m": 1286.0,
   "start_elevation_m": 234.34349977699728,
   "end_elevation_m": 234.17085770620392,
   "start_xy": [
    313164.7970865382,
    96928.18899141788
   ],
   "end_xy": [
    313167.77305955667,
    96918.64207779507
   ]
  },
  "min_20m": {
   "gradient_pct": -1.3030813242467332,
   "start_distance_m": 1251.0,
   "end_distance_m": 1271.0,
   "midpoint_distance_m": 1261.0,
   "start_elevation_m": 234.45817785955245,
   "end_elevation_m": 234.1975615947031,
   "start_xy": [
    313155.8696852837,
    96956.8298941215
   ],
   "end_xy": [
    313161.8210198187,
    96937.73587608435
   ]
  },
  "min_25m": {
   "gradient_pct": -1.093687765436698,
   "start_distance_m": 1243.0,
   "end_distance_m": 1268.0,
   "midpoint_distance_m": 1255.5,
   "start_elevation_m": 234.52236489327447,
   "end_elevation_m": 234.2489429519153,
   "start_xy": [
    313154.180896606,
    96964.63372253002
   ],
   "end_xy": [
    313160.92872224055,
    96940.60010431834
   ]
  },
  "min_50m": {
   "gradient_pct": -0.7895001900504326,
   "start_distance_m": 1220.0,
   "end_distance_m": 1270.0,
   "midpoint_distance_m": 1245.0,
   "start_elevation_m": 234.56293512862666,
   "end_elevation_m": 234.16818503360145,
   "start_xy": [
    313150.4489169103,
    96987.32892547196
   ],
   "end_xy": [
    313161.5237546879,
    96938.69067095284
   ]
  },
  "min_100m": {
   "gradient_pct": -0.441944279987581,
   "start_distance_m": 1209.0,
   "end_distance_m": 1309.0,
   "midpoint_distance_m": 1259.0,
   "start_elevation_m": 234.5551013454897,
   "end_elevation_m": 234.11315706550212,
   "start_xy": [
    313148.66399190883,
    96998.18314188882
   ],
   "end_xy": [
    313173.1297702612,
    96901.45762087738
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.753747825575203,
   "start_distance_m": 919.0,
   "end_distance_m": 921.0,
   "midpoint_distance_m": 920.0,
   "start_elevation_m": 214.85119088687418,
   "end_elevation_m": 215.40626584338568,
   "start_xy": [
    313111.7802447264,
    97259.55413119975
   ],
   "end_xy": [
    313113.70959745604,
    97260.08100594231
   ]
  },
  "max_3m": {
   "gradient_pct": 23.84044478919994,
   "start_distance_m": 918.0,
   "end_distance_m": 921.0,
   "midpoint_distance_m": 919.5,
   "start_elevation_m": 214.69105249970968,
   "end_elevation_m": 215.40626584338568,
   "start_xy": [
    313110.81553911127,
    97259.29080060816
   ],
   "end_xy": [
    313113.70959745604,
    97260.08100594231
   ]
  }
 },
 "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": 0.021,
   "obstruction_max_height_m": 13.45,
   "flagged_windows_m": [
    2,
    100
   ]
  },
  "structure_suppression": {
   "masked_fraction": 0.005,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "excluded_ranges_m": [
   [
    967.0,
    972.0
   ]
  ],
  "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/SY1095.tif"
  ],
  "calculated_at": "2026-08-19T18:17:51+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": [
   "SY1095.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 15.7% over 200 m (Terrain 50), gain 96.6 m over 1046 m way. EXTENDED by graph walk: +3 segment(s) at base, +0 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 (50.7680, -3.2348)'.",
  "naming_note": "auto-named from gazetteer (hypothesis, unreviewed); discovered as 'Discovered lane (50.7680, -3.2348)'"
 },
 "area": {
  "place": "Gittisham",
  "county": "Devon"
 }
}