{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.4308, -3.9687)",
 "slug": "discovered-lane-50-4308-3-9687",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.10939032817191,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1422.0,
   "end_distance_m": 1424.0,
   "start_elevation_m": 231.10689033607707,
   "end_elevation_m": 231.9090781426405,
   "min_gradient_pct": -18.208795036160552,
   "suppressed_max_gradient_pct": 68.09155351722183,
   "suppressed_location_m": [
    926.0,
    928.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.089773198342336,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1421.0,
   "end_distance_m": 1424.0,
   "start_elevation_m": 230.82638494669024,
   "end_elevation_m": 231.9090781426405,
   "min_gradient_pct": -14.739214102543011,
   "suppressed_max_gradient_pct": 51.51437055347685,
   "suppressed_location_m": [
    925.0,
    928.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.19102428960741,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1419.0,
   "end_distance_m": 1424.0,
   "start_elevation_m": 230.19952692816014,
   "end_elevation_m": 231.9090781426405,
   "min_gradient_pct": -9.6603240209663,
   "suppressed_max_gradient_pct": 35.35191109915502,
   "suppressed_location_m": [
    924.0,
    929.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.844423204366308,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 978.0,
   "end_distance_m": 988.0,
   "start_elevation_m": 173.4514780434987,
   "end_elevation_m": 176.13592036393533,
   "min_gradient_pct": -2.386035303744052
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.543257525077678,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1271.0,
   "end_distance_m": 1291.0,
   "start_elevation_m": 211.09786916931066,
   "end_elevation_m": 215.6065206743262,
   "min_gradient_pct": 1.4283627397726661
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.94338209923751,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1266.0,
   "end_distance_m": 1291.0,
   "start_elevation_m": 210.3706751495168,
   "end_elevation_m": 215.6065206743262,
   "min_gradient_pct": 1.488201729294076
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.548808727823257,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1241.0,
   "end_distance_m": 1291.0,
   "start_elevation_m": 206.33211631041456,
   "end_elevation_m": 215.6065206743262,
   "min_gradient_pct": 2.6591155866755116
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.059990099390374,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1196.0,
   "end_distance_m": 1296.0,
   "start_elevation_m": 201.20440243556243,
   "end_elevation_m": 216.2643925349528,
   "min_gradient_pct": 3.6024158078362802
  }
 ],
 "shape": {
  "ascent_concentration": 0.414,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 125.0,
  "shape_class": "sustained"
 },
 "length_m": 1477.9948525843206,
 "start_elevation_m": 119.9479672100826,
 "end_elevation_m": 238.61662188922227,
 "endpoint_gain_m": 118.66865467913968,
 "overall_gradient_pct": 8.029030308978667,
 "accumulated_ascent_m": 121.82669054555456,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.19102428960741,
   "start_distance_m": 1419.0,
   "end_distance_m": 1424.0,
   "midpoint_distance_m": 1421.5,
   "start_elevation_m": 230.19952692816014,
   "end_elevation_m": 231.9090781426405,
   "start_xy": [
    260337.55779153673,
    61279.633519683994
   ],
   "end_xy": [
    260338.4941695268,
    61284.54505674073
   ]
  },
  "max_10m": {
   "gradient_pct": 26.844423204366308,
   "start_distance_m": 978.0,
   "end_distance_m": 988.0,
   "midpoint_distance_m": 983.0,
   "start_elevation_m": 173.4514780434987,
   "end_elevation_m": 176.13592036393533,
   "start_xy": [
    260259.70597935654,
    60849.55403702951
   ],
   "end_xy": [
    260265.57166248283,
    60857.58879129596
   ]
  },
  "max_20m": {
   "gradient_pct": 22.543257525077678,
   "start_distance_m": 1271.0,
   "end_distance_m": 1291.0,
   "midpoint_distance_m": 1281.0,
   "start_elevation_m": 211.09786916931066,
   "end_elevation_m": 215.6065206743262,
   "start_xy": [
    260312.31793918498,
    61135.44347802266
   ],
   "end_xy": [
    260317.40633828816,
    61154.67145477446
   ]
  },
  "max_25m": {
   "gradient_pct": 20.94338209923751,
   "start_distance_m": 1266.0,
   "end_distance_m": 1291.0,
   "midpoint_distance_m": 1278.5,
   "start_elevation_m": 210.3706751495168,
   "end_elevation_m": 215.6065206743262,
   "start_xy": [
    260311.39010833975,
    61130.53031916886
   ],
   "end_xy": [
    260317.40633828816,
    61154.67145477446
   ]
  },
  "max_50m": {
   "gradient_pct": 18.548808727823257,
   "start_distance_m": 1241.0,
   "end_distance_m": 1291.0,
   "midpoint_distance_m": 1266.0,
   "start_elevation_m": 206.33211631041456,
   "end_elevation_m": 215.6065206743262,
   "start_xy": [
    260307.43975346495,
    61105.84446932641
   ],
   "end_xy": [
    260317.40633828816,
    61154.67145477446
   ]
  },
  "max_100m": {
   "gradient_pct": 15.059990099390374,
   "start_distance_m": 1196.0,
   "end_distance_m": 1296.0,
   "midpoint_distance_m": 1246.0,
   "start_elevation_m": 201.20440243556243,
   "end_elevation_m": 216.2643925349528,
   "start_xy": [
    260298.3124669059,
    61061.78964754461
   ],
   "end_xy": [
    260319.40672305046,
    61159.25386252615
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.6603240209663,
   "start_distance_m": 929.0,
   "end_distance_m": 934.0,
   "midpoint_distance_m": 931.5,
   "start_elevation_m": 169.60211494620714,
   "end_elevation_m": 169.11909874515882,
   "start_xy": [
    260228.4209050304,
    60811.84753364187
   ],
   "end_xy": [
    260231.57513705912,
    60815.72707231405
   ]
  },
  "min_10m": {
   "gradient_pct": -2.386035303744052,
   "start_distance_m": 929.0,
   "end_distance_m": 939.0,
   "midpoint_distance_m": 934.0,
   "start_elevation_m": 169.60211494620714,
   "end_elevation_m": 169.36351141583273,
   "start_xy": [
    260228.4209050304,
    60811.84753364187
   ],
   "end_xy": [
    260234.72936908784,
    60819.60661098622
   ]
  },
  "min_20m": {
   "gradient_pct": 1.4283627397726661,
   "start_distance_m": 107.0,
   "end_distance_m": 127.0,
   "midpoint_distance_m": 117.0,
   "start_elevation_m": 124.32211634094423,
   "end_elevation_m": 124.60778888889877,
   "start_xy": [
    260134.29987802004,
    60054.92122196196
   ],
   "end_xy": [
    260142.24997615663,
    60073.168771723926
   ]
  },
  "min_25m": {
   "gradient_pct": 1.488201729294076,
   "start_distance_m": 109.0,
   "end_distance_m": 134.0,
   "midpoint_distance_m": 121.5,
   "start_elevation_m": 124.37245942710031,
   "end_elevation_m": 124.74450985942383,
   "start_xy": [
    260135.5222210482,
    60056.50421833643
   ],
   "end_xy": [
    260144.79532008237,
    60079.68960175542
   ]
  },
  "min_50m": {
   "gradient_pct": 2.6591155866755116,
   "start_distance_m": 105.0,
   "end_distance_m": 155.0,
   "midpoint_distance_m": 130.0,
   "start_elevation_m": 124.21828021101479,
   "end_elevation_m": 125.54783800435254,
   "start_xy": [
    260133.0775349919,
    60053.33822558749
   ],
   "end_xy": [
    260152.43135185968,
    60099.252091849885
   ]
  },
  "min_100m": {
   "gradient_pct": 3.6024158078362802,
   "start_distance_m": 74.0,
   "end_distance_m": 174.0,
   "midpoint_distance_m": 124.0,
   "start_elevation_m": 122.86844281870167,
   "end_elevation_m": 126.47085862653795,
   "start_xy": [
    260124.34440904675,
    60024.3760972081
   ],
   "end_xy": [
    260159.3401425153,
    60116.95148764965
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.10939032817191,
   "start_distance_m": 1422.0,
   "end_distance_m": 1424.0,
   "midpoint_distance_m": 1423.0,
   "start_elevation_m": 231.10689033607707,
   "end_elevation_m": 231.9090781426405,
   "start_xy": [
    260338.11961833076,
    61282.580441918035
   ],
   "end_xy": [
    260338.4941695268,
    61284.54505674073
   ]
  },
  "max_3m": {
   "gradient_pct": 36.089773198342336,
   "start_distance_m": 1421.0,
   "end_distance_m": 1424.0,
   "midpoint_distance_m": 1422.5,
   "start_elevation_m": 230.82638494669024,
   "end_elevation_m": 231.9090781426405,
   "start_xy": [
    260337.93234273276,
    61281.59813450669
   ],
   "end_xy": [
    260338.4941695268,
    61284.54505674073
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.005,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.07,
   "obstruction_max_height_m": 15.57,
   "flagged_windows_m": [
    5,
    10
   ]
  },
  "excluded_ranges_m": [
   [
    924.0,
    930.0
   ]
  ],
  "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/SX6055.tif",
   "data/cache/england/bulk_dtm_1m/SX6060.tif"
  ],
  "calculated_at": "2026-09-05T01:11:45+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106794610/hunt-gb/regions/region-05.osm.pbf",
  "osm_snapshot": "",
  "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": [
   "SX6055.tif",
   "SX6060.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cornwood",
  "county": "Devon"
 }
}