{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.9022, -3.0252)",
 "slug": "discovered-lane-50-9022-3-0252",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 42.47793923431402,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2136.0,
   "end_distance_m": 2138.0,
   "start_elevation_m": 184.88648117089355,
   "end_elevation_m": 185.73603995557983,
   "min_gradient_pct": -27.16787055042289,
   "suppressed_max_gradient_pct": 51.582801619477436,
   "suppressed_location_m": [
    2167.0,
    2169.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 37.759104001734535,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2136.0,
   "end_distance_m": 2139.0,
   "start_elevation_m": 184.88648117089355,
   "end_elevation_m": 186.01925429094558,
   "min_gradient_pct": -22.332376296680916,
   "suppressed_max_gradient_pct": 49.274357816041935,
   "suppressed_location_m": [
    2165.0,
    2168.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.18546142260584,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2137.0,
   "end_distance_m": 2142.0,
   "start_elevation_m": 185.26419319456218,
   "end_elevation_m": 186.82346626569247,
   "min_gradient_pct": -18.427981236968094,
   "suppressed_max_gradient_pct": 48.770357434837024,
   "suppressed_location_m": [
    2163.0,
    2168.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.114603235229424,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2133.0,
   "end_distance_m": 2143.0,
   "start_elevation_m": 184.40378355729666,
   "end_elevation_m": 187.1152438808196,
   "min_gradient_pct": -16.12126876644794,
   "suppressed_max_gradient_pct": 39.974291552950376,
   "suppressed_location_m": [
    2163.0,
    2173.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.94451790378332,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2123.0,
   "end_distance_m": 2143.0,
   "start_elevation_m": 182.52634030006294,
   "end_elevation_m": 187.1152438808196,
   "min_gradient_pct": -13.173298637703539,
   "suppressed_max_gradient_pct": 31.39910496151856,
   "suppressed_location_m": [
    2153.0,
    2173.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.46592657424503,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2118.0,
   "end_distance_m": 2143.0,
   "start_elevation_m": 181.74876223725835,
   "end_elevation_m": 187.1152438808196,
   "min_gradient_pct": -13.052264093535769,
   "suppressed_max_gradient_pct": 29.182642344543638,
   "suppressed_location_m": [
    2149.0,
    2174.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.227961839299894,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2114.0,
   "end_distance_m": 2164.0,
   "start_elevation_m": 181.20538193756104,
   "end_elevation_m": 190.819362857211,
   "min_gradient_pct": -12.411456994449622,
   "suppressed_max_gradient_pct": 23.943194217689893,
   "suppressed_location_m": [
    2124.0,
    2174.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.450418770433714,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 2064.0,
   "end_distance_m": 2164.0,
   "start_elevation_m": 174.36894408677728,
   "end_elevation_m": 190.819362857211,
   "min_gradient_pct": -11.180945539433283,
   "suppressed_max_gradient_pct": 19.082956934412948,
   "suppressed_location_m": [
    2074.0,
    2174.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.5,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 181.0,
  "shape_class": "stepped"
 },
 "length_m": 3367.339171767583,
 "start_elevation_m": 139.90442967549023,
 "end_elevation_m": 225.74526800689694,
 "endpoint_gain_m": 85.8408383314067,
 "overall_gradient_pct": 2.5492186546313107,
 "accumulated_ascent_m": 149.60998670302203,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.18546142260584,
   "start_distance_m": 2137.0,
   "end_distance_m": 2142.0,
   "midpoint_distance_m": 2139.5,
   "start_elevation_m": 185.26419319456218,
   "end_elevation_m": 186.82346626569247,
   "start_xy": [
    328107.3934850344,
    111897.89676928012
   ],
   "end_xy": [
    328112.36069302657,
    111897.34398409119
   ]
  },
  "max_10m": {
   "gradient_pct": 27.114603235229424,
   "start_distance_m": 2133.0,
   "end_distance_m": 2143.0,
   "midpoint_distance_m": 2138.0,
   "start_elevation_m": 184.40378355729666,
   "end_elevation_m": 187.1152438808196,
   "start_xy": [
    328103.3938705457,
    111897.95230252981
   ],
   "end_xy": [
    328113.3535488777,
    111897.22466410573
   ]
  },
  "max_20m": {
   "gradient_pct": 22.94451790378332,
   "start_distance_m": 2123.0,
   "end_distance_m": 2143.0,
   "midpoint_distance_m": 2133.0,
   "start_elevation_m": 182.52634030006294,
   "end_elevation_m": 187.1152438808196,
   "start_xy": [
    328093.3952731518,
    111898.03459331981
   ],
   "end_xy": [
    328113.3535488777,
    111897.22466410573
   ]
  },
  "max_25m": {
   "gradient_pct": 21.46592657424503,
   "start_distance_m": 2118.0,
   "end_distance_m": 2143.0,
   "midpoint_distance_m": 2130.5,
   "start_elevation_m": 181.74876223725835,
   "end_elevation_m": 187.1152438808196,
   "start_xy": [
    328088.3974347113,
    111897.88758678247
   ],
   "end_xy": [
    328113.3535488777,
    111897.22466410573
   ]
  },
  "max_50m": {
   "gradient_pct": 19.227961839299894,
   "start_distance_m": 2114.0,
   "end_distance_m": 2164.0,
   "midpoint_distance_m": 2139.0,
   "start_elevation_m": 181.20538193756104,
   "end_elevation_m": 190.819362857211,
   "start_xy": [
    328084.3991639588,
    111897.76998155258
   ],
   "end_xy": [
    328131.70895167626,
    111888.8995501617
   ]
  },
  "max_100m": {
   "gradient_pct": 16.450418770433714,
   "start_distance_m": 2064.0,
   "end_distance_m": 2164.0,
   "midpoint_distance_m": 2114.0,
   "start_elevation_m": 174.36894408677728,
   "end_elevation_m": 190.819362857211,
   "start_xy": [
    328034.72556469834,
    111899.08694620426
   ],
   "end_xy": [
    328131.70895167626,
    111888.8995501617
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -18.427981236968094,
   "start_distance_m": 1674.0,
   "end_distance_m": 1679.0,
   "midpoint_distance_m": 1676.5,
   "start_elevation_m": 201.7516297352989,
   "end_elevation_m": 200.8302306734505,
   "start_xy": [
    327700.721178825,
    112096.9531289738
   ],
   "end_xy": [
    327705.06966371794,
    112094.48519884371
   ]
  },
  "min_10m": {
   "gradient_pct": -16.12126876644794,
   "start_distance_m": 1706.0,
   "end_distance_m": 1716.0,
   "midpoint_distance_m": 1711.0,
   "start_elevation_m": 199.98202296304376,
   "end_elevation_m": 198.36989608639897,
   "start_xy": [
    327729.58112023235,
    112083.28438216892
   ],
   "end_xy": [
    327738.83068814926,
    112079.48686172474
   ]
  },
  "min_20m": {
   "gradient_pct": -13.173298637703539,
   "start_distance_m": 1914.0,
   "end_distance_m": 1934.0,
   "midpoint_distance_m": 1924.0,
   "start_elevation_m": 180.1000375352847,
   "end_elevation_m": 177.465377807744,
   "start_xy": [
    327905.1522031749,
    111973.48276876072
   ],
   "end_xy": [
    327922.6165888625,
    111963.78080413639
   ]
  },
  "min_25m": {
   "gradient_pct": -13.052264093535769,
   "start_distance_m": 1742.0,
   "end_distance_m": 1767.0,
   "midpoint_distance_m": 1754.5,
   "start_elevation_m": 196.82558297476774,
   "end_elevation_m": 193.5625169513838,
   "start_xy": [
    327761.2132352157,
    112066.39587517662
   ],
   "end_xy": [
    327781.2643275451,
    112051.46424109334
   ]
  },
  "min_50m": {
   "gradient_pct": -12.411456994449622,
   "start_distance_m": 1891.0,
   "end_distance_m": 1941.0,
   "midpoint_distance_m": 1916.0,
   "start_elevation_m": 182.89981136142376,
   "end_elevation_m": 176.69408286419895,
   "start_xy": [
    327884.2635797893,
    111983.1090563658
   ],
   "end_xy": [
    327928.47340113117,
    111959.95409267391
   ]
  },
  "min_100m": {
   "gradient_pct": -11.180945539433283,
   "start_distance_m": 1868.0,
   "end_distance_m": 1968.0,
   "midpoint_distance_m": 1918.0,
   "start_elevation_m": 185.15110794566175,
   "end_elevation_m": 173.97016240622847,
   "start_xy": [
    327863.7464034427,
    111993.49315391689
   ],
   "end_xy": [
    327950.84524934745,
    111944.85825549153
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 42.47793923431402,
   "start_distance_m": 2136.0,
   "end_distance_m": 2138.0,
   "midpoint_distance_m": 2137.0,
   "start_elevation_m": 184.88648117089355,
   "end_elevation_m": 185.73603995557983,
   "start_xy": [
    328106.39358141227,
    111897.91065259255
   ],
   "end_xy": [
    328108.38926962216,
    111897.821264033
   ]
  },
  "max_3m": {
   "gradient_pct": 37.759104001734535,
   "start_distance_m": 2136.0,
   "end_distance_m": 2139.0,
   "midpoint_distance_m": 2137.5,
   "start_elevation_m": 184.88648117089355,
   "end_elevation_m": 186.01925429094558,
   "start_xy": [
    328106.39358141227,
    111897.91065259255
   ],
   "end_xy": [
    328109.38212547323,
    111897.70194404754
   ]
  }
 },
 "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": 0.002,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.056,
   "obstruction_max_height_m": 14.17,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50
   ]
  },
  "excluded_ranges_m": [
   [
    2165.0,
    2170.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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/ST2510.tif"
  ],
  "calculated_at": "2026-09-05T01:53:55+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "/mnt/HC_Volume_106792346/hunt-gb/regions/region-08.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": [
   "ST2510.tif"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Bishopswood",
  "county": "Somerset"
 },
 "review_flags": [
  {
   "kind": "possible-bridge-or-hollow",
   "span_m": [
    1952.0,
    2128.0
   ],
   "status": "pending-human-review",
   "noted": "2026-09-21",
   "figure_adjusted": false
  }
 ]
}