{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (50.4926, -3.6786)",
 "slug": "discovered-lane-50-4926-3-6786",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.034049370150257,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 175.0,
   "end_distance_m": 177.0,
   "start_elevation_m": 69.33646415142759,
   "end_elevation_m": 69.8171451388306,
   "min_gradient_pct": -19.74717522434375,
   "suppressed_max_gradient_pct": 47.20838016248834,
   "suppressed_location_m": [
    115.0,
    117.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.582367273912023,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 131.0,
   "end_distance_m": 134.0,
   "start_elevation_m": 64.0295812515881,
   "end_elevation_m": 64.70705226980546,
   "min_gradient_pct": -15.05465031680894,
   "suppressed_max_gradient_pct": 45.24924867223561,
   "suppressed_location_m": [
    111.0,
    114.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 21.88375977048338,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "suppression_unstable",
    "texture_excluded"
   ],
   "start_distance_m": 91.0,
   "end_distance_m": 96.0,
   "start_elevation_m": 55.7741847127666,
   "end_elevation_m": 56.86837270129077,
   "min_gradient_pct": -8.669445323526475,
   "suppressed_max_gradient_pct": 43.58910832738374,
   "suppressed_location_m": [
    111.0,
    116.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 19.038953763367985,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 87.0,
   "end_distance_m": 97.0,
   "start_elevation_m": 55.16925650970774,
   "end_elevation_m": 57.07315188604454,
   "min_gradient_pct": -6.283945476630635,
   "suppressed_max_gradient_pct": 36.910666309488036,
   "suppressed_location_m": [
    107.0,
    117.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 16.680538730027017,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 79.0,
   "end_distance_m": 99.0,
   "start_elevation_m": 53.98266110068533,
   "end_elevation_m": 57.31876884669073,
   "min_gradient_pct": -4.4929258254125415,
   "suppressed_max_gradient_pct": 27.756793439384285,
   "suppressed_location_m": [
    108.0,
    128.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 13.588161127280557,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 131.0,
   "end_distance_m": 156.0,
   "start_elevation_m": 64.0295812515881,
   "end_elevation_m": 67.42662153340824,
   "min_gradient_pct": -3.763728237333737,
   "suppressed_max_gradient_pct": 25.00624583223035,
   "suppressed_location_m": [
    103.0,
    128.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 12.591277106786633,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 131.0,
   "end_distance_m": 181.0,
   "start_elevation_m": 64.0295812515881,
   "end_elevation_m": 70.32521980498142,
   "min_gradient_pct": -2.7976780460477073,
   "suppressed_max_gradient_pct": 20.2600480970264,
   "suppressed_location_m": [
    88.0,
    138.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 10.75306013259271,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 677.0,
   "end_distance_m": 777.0,
   "start_elevation_m": 67.22150537169166,
   "end_elevation_m": 77.97456550428437,
   "min_gradient_pct": -1.994474007135267,
   "suppressed_max_gradient_pct": 17.60374208280342,
   "suppressed_location_m": [
    24.0,
    124.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.525,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 78.0,
  "shape_class": "stepped"
 },
 "length_m": 1120.8285723881377,
 "start_elevation_m": 43.63312903548686,
 "end_elevation_m": 86.38155273391722,
 "endpoint_gain_m": 42.74842369843036,
 "overall_gradient_pct": 3.814001958153756,
 "accumulated_ascent_m": 53.630077077110734,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 21.88375977048338,
   "start_distance_m": 91.0,
   "end_distance_m": 96.0,
   "midpoint_distance_m": 93.5,
   "start_elevation_m": 55.7741847127666,
   "end_elevation_m": 56.86837270129077,
   "start_xy": [
    281077.5412258939,
    67572.61270141542
   ],
   "end_xy": [
    281077.7832374167,
    67577.60684039346
   ]
  },
  "max_10m": {
   "gradient_pct": 19.038953763367985,
   "start_distance_m": 87.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 92.0,
   "start_elevation_m": 55.16925650970774,
   "end_elevation_m": 57.07315188604454,
   "start_xy": [
    281077.34721628804,
    67568.61740962781
   ],
   "end_xy": [
    281077.83244238805,
    67578.60562411933
   ]
  },
  "max_20m": {
   "gradient_pct": 16.680538730027017,
   "start_distance_m": 79.0,
   "end_distance_m": 99.0,
   "midpoint_distance_m": 89.0,
   "start_elevation_m": 53.98266110068533,
   "end_elevation_m": 57.31876884669073,
   "start_xy": [
    281076.9602294753,
    67560.62677595399
   ],
   "end_xy": [
    281078.40579080314,
    67580.47986551723
   ]
  },
  "max_25m": {
   "gradient_pct": 13.588161127280557,
   "start_distance_m": 131.0,
   "end_distance_m": 156.0,
   "midpoint_distance_m": 143.5,
   "start_elevation_m": 64.0295812515881,
   "end_elevation_m": 67.42662153340824,
   "start_xy": [
    281098.65351115016,
    67605.25948442196
   ],
   "end_xy": [
    281123.04393344594,
    67606.21944133108
   ]
  },
  "max_50m": {
   "gradient_pct": 12.591277106786633,
   "start_distance_m": 131.0,
   "end_distance_m": 181.0,
   "midpoint_distance_m": 156.0,
   "start_elevation_m": 64.0295812515881,
   "end_elevation_m": 70.32521980498142,
   "start_xy": [
    281098.65351115016,
    67605.25948442196
   ],
   "end_xy": [
    281148.03883048723,
    67605.71444339026
   ]
  },
  "max_100m": {
   "gradient_pct": 10.75306013259271,
   "start_distance_m": 677.0,
   "end_distance_m": 777.0,
   "midpoint_distance_m": 727.0,
   "start_elevation_m": 67.22150537169166,
   "end_elevation_m": 77.97456550428437,
   "start_xy": [
    281589.1175309311,
    67667.17171303112
   ],
   "end_xy": [
    281632.9370542333,
    67748.54641231657
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.669445323526475,
   "start_distance_m": 181.0,
   "end_distance_m": 186.0,
   "midpoint_distance_m": 183.5,
   "start_elevation_m": 70.32521980498142,
   "end_elevation_m": 69.89174753880509,
   "start_xy": [
    281148.03883048723,
    67605.71444339026
   ],
   "end_xy": [
    281153.0378098955,
    67605.6134438021
   ]
  },
  "min_10m": {
   "gradient_pct": -6.283945476630635,
   "start_distance_m": 181.0,
   "end_distance_m": 191.0,
   "midpoint_distance_m": 186.0,
   "start_elevation_m": 70.32521980498142,
   "end_elevation_m": 69.69682525731835,
   "start_xy": [
    281148.03883048723,
    67605.71444339026
   ],
   "end_xy": [
    281158.0367893038,
    67605.51244421393
   ]
  },
  "min_20m": {
   "gradient_pct": -4.4929258254125415,
   "start_distance_m": 181.0,
   "end_distance_m": 201.0,
   "midpoint_distance_m": 191.0,
   "start_elevation_m": 70.32521980498142,
   "end_elevation_m": 69.42663463989891,
   "start_xy": [
    281148.03883048723,
    67605.71444339026
   ],
   "end_xy": [
    281168.03474812035,
    67605.3104450376
   ]
  },
  "min_25m": {
   "gradient_pct": -3.763728237333737,
   "start_distance_m": 250.0,
   "end_distance_m": 275.0,
   "midpoint_distance_m": 262.5,
   "start_elevation_m": 69.50417442880068,
   "end_elevation_m": 68.56324236946725,
   "start_xy": [
    281216.8571615595,
    67604.99944559643
   ],
   "end_xy": [
    281232.32979655114,
    67624.63608105044
   ]
  },
  "min_50m": {
   "gradient_pct": -2.7976780460477073,
   "start_distance_m": 235.0,
   "end_distance_m": 285.0,
   "midpoint_distance_m": 260.0,
   "start_elevation_m": 69.69853827170024,
   "end_elevation_m": 68.29969924867639,
   "start_xy": [
    281202.02780391823,
    67604.62344392164
   ],
   "end_xy": [
    281238.51807974913,
    67632.49134184667
   ]
  },
  "min_100m": {
   "gradient_pct": -1.994474007135267,
   "start_distance_m": 415.0,
   "end_distance_m": 515.0,
   "midpoint_distance_m": 465.0,
   "start_elevation_m": 67.46141140322666,
   "end_elevation_m": 65.4669373960914,
   "start_xy": [
    281343.0289427613,
    67701.24788322189
   ],
   "end_xy": [
    281441.8513071082,
    67691.75910170858
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.034049370150257,
   "start_distance_m": 175.0,
   "end_distance_m": 177.0,
   "midpoint_distance_m": 176.0,
   "start_elevation_m": 69.33646415142759,
   "end_elevation_m": 69.8171451388306,
   "start_xy": [
    281142.040051019,
    67605.83543897961
   ],
   "end_xy": [
    281144.03965057235,
    67605.79541933798
   ]
  },
  "max_3m": {
   "gradient_pct": 22.582367273912023,
   "start_distance_m": 131.0,
   "end_distance_m": 134.0,
   "midpoint_distance_m": 132.5,
   "start_elevation_m": 64.0295812515881,
   "end_elevation_m": 64.70705226980546,
   "start_xy": [
    281098.65351115016,
    67605.25948442196
   ],
   "end_xy": [
    281101.04841609293,
    67606.66345167815
   ]
  }
 },
 "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": {
  "texture_suppression": {
   "masked_fraction": 0.059,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 2,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 103.0,
     "end_m": 128.0,
     "raw_pct": 25.01,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 108.0,
     "end_m": 128.0,
     "raw_pct": 27.76,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 107.0,
     "end_m": 117.0,
     "raw_pct": 36.91,
     "reason": "hump+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 111.0,
     "end_m": 116.0,
     "raw_pct": 43.59,
     "reason": "hump"
    },
    {
     "window_m": 25.0,
     "start_m": 25.0,
     "end_m": 50.0,
     "raw_pct": 22.95,
     "reason": "staircase+hump"
    },
    {
     "window_m": 20.0,
     "start_m": 19.0,
     "end_m": 39.0,
     "raw_pct": 22.92,
     "reason": "edge-step+hump"
    },
    {
     "window_m": 10.0,
     "start_m": 24.0,
     "end_m": 34.0,
     "raw_pct": 29.36,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": [],
   "unstable": [
    {
     "window_m": 5.0,
     "start_m": 23.0,
     "end_m": 28.0,
     "raw_pct": 34.51,
     "reason": "short-step",
     "perturbations": [
      "phase+0.000/mask+0",
      "phase+0.333/mask+1",
      "phase+0.667/mask-1"
     ],
     "perturbation_reasons": [
      "short-step",
      "short-step",
      ""
     ]
    }
   ]
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.081,
   "obstruction_max_height_m": 13.49,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    17.0,
    52.0
   ],
   [
    101.0,
    130.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "8f4becd2ed8ab26772f5cd961ca7d1d0c2823252",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:8c94015b54267da4",
   "python": "3.14.4",
   "numpy": "2.5.3",
   "rasterio": "1.5.1",
   "pyproj": "3.8.0",
   "laspy": "2.7.0",
   "shapely": "2.1.2",
   "pyosmium": "4.3.1",
   "libosmium": "2.23.1",
   "gdal": "3.12.4",
   "proj": "9.8.1",
   "run_id": "remeasure-valley-260921-uk",
   "road_pbf": "batch-england-chunk000.pbf",
   "region_key": "england",
   "crs": "EPSG:27700",
   "elevation_provider_key": "england",
   "authority": "os-open-roads",
   "registry_pbf": "england-2026-08-27.osm.pbf"
  },
  "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/dtm_1m/E280000_N66000_2000m.tif",
   "data/cache/england/dtm_1m/E280000_N68000_2000m.tif"
  ],
  "calculated_at": "2026-09-22T00:12:46+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/valley-260921/uk/batch-england-chunk000.pbf",
  "osm_snapshot": "",
  "run_id": "remeasure-valley-260921-uk",
  "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": [
   "E280000_N66000_2000m.tif",
   "E280000_N68000_2000m.tif"
  ],
  "route_base_cut_m": 1113.0,
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "structure_own_ways_source": "map-matched to the road network: the entry carried no way list, so the ways the route runs along were found by geometry (ukclimb.batch.own_ways_by_geometry)",
  "prior_doc": {
   "slug": "discovered-lane-50-4926-3-6786",
   "calculated_at": "2026-09-12T01:38:23+00:00",
   "code_git_sha": null,
   "analysis_version": "0.1.0",
   "run_id": "texture-uk-england-260912",
   "path": "/root/uk-climbs/output/valley-260921/uk/priors/discovered-lane-50-4926-3-6786/discovered-lane-50-4926-3-6786.json",
   "spans": 12,
   "sources": [
    "excluded_ranges_m",
    "texture"
   ]
  },
  "suppression_unstable": [
   5.0
  ],
  "carriageway": {
   "stations": 51,
   "stations_resolved": 51,
   "width_median_m": 5.5,
   "width_p10_m": 2.5,
   "width_min_m": 2.0,
   "width_max_m": 12.0,
   "bounded_share": 0.118,
   "unbounded_share": 0.882,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.75,
   "window_m": [
    131.0,
    156.0
   ],
   "width_at_max25_m": 4.0,
   "window_stations": 7,
   "single_track": false,
   "single_track_rule": "PROVISIONAL (2026-09-15): width_p10_m <= 3.0 m with bounded_share >= 0.6; recorded, not a rule",
   "status": "ok",
   "source": "dtm",
   "station_m": 25.0,
   "window_station_m": 5.0,
   "halfwidth_m": 6.0,
   "step_m": 0.25,
   "level_tol_m": 0.12,
   "break_min_m": 0.3,
   "stations_failed": 0,
   "hedge_to_hedge": {
    "stations": 51,
    "stations_resolved": 51,
    "width_median_m": 5.0,
    "width_p10_m": 1.25,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.784,
    "unbounded_share": 0.216,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.75,
    "window_m": [
     131.0,
     156.0
    ],
    "width_at_max25_m": 2.0,
    "window_stations": 7,
    "status": "ok",
    "source": "dsm",
    "station_m": 25.0,
    "window_station_m": 5.0,
    "halfwidth_m": 6.0,
    "step_m": 0.25,
    "level_tol_m": 0.5,
    "break_min_m": 0.3,
    "stations_failed": 0
   }
  },
  "remeasured": {
   "on": "2026-09-22",
   "why": "valley-crossing extent re-measure 2026-09-22: low-to-summit (1113.0 m -> 2234.0 m)",
   "published_max25_pct": 13.58,
   "max25_pct": 13.59
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Broadhempston",
  "county": "Devon"
 }
}