{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (54.2807, -2.5890)",
 "slug": "discovered-lane-54-2807-2-5890",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 46.980353623600024,
   "diagnostic": true,
   "flags": [
    "structure_excluded_min"
   ],
   "start_distance_m": 1541.0,
   "end_distance_m": 1543.0,
   "start_elevation_m": 129.76448806755585,
   "end_elevation_m": 130.70409514002785,
   "min_gradient_pct": -25.88517269251227,
   "suppressed_min_gradient_pct": -44.55331034208996,
   "suppressed_min_location_m": [
    326.0,
    328.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.63381586183425,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 1540.0,
   "end_distance_m": 1543.0,
   "start_elevation_m": 129.63508066417282,
   "end_elevation_m": 130.70409514002785,
   "min_gradient_pct": -23.0544382440011,
   "suppressed_max_gradient_pct": 37.12841524675431,
   "suppressed_location_m": [
    329.0,
    332.0
   ],
   "suppressed_min_gradient_pct": -32.09090447510192,
   "suppressed_min_location_m": [
    326.0,
    329.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.36835643690199,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 2121.0,
   "end_distance_m": 2126.0,
   "start_elevation_m": 184.5165411050768,
   "end_elevation_m": 185.8849589269219,
   "min_gradient_pct": -21.455706766135165,
   "suppressed_max_gradient_pct": 27.53918114186746,
   "suppressed_location_m": [
    329.0,
    334.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.865377385858153,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 2120.0,
   "end_distance_m": 2130.0,
   "start_elevation_m": 184.35616228326106,
   "end_elevation_m": 186.74270002184687,
   "min_gradient_pct": -19.296737439002953,
   "suppressed_max_gradient_pct": 24.29442932612261,
   "suppressed_location_m": [
    1670.0,
    1680.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.18151829382299,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1539.0,
   "end_distance_m": 1559.0,
   "start_elevation_m": 129.4524015833073,
   "end_elevation_m": 133.6887052420719,
   "min_gradient_pct": -16.40817397524245
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.302376003024165,
   "diagnostic": false,
   "flags": [
    "suppression_unstable"
   ],
   "start_distance_m": 1541.0,
   "end_distance_m": 1566.0,
   "start_elevation_m": 129.76448806755585,
   "end_elevation_m": 134.8400820683119,
   "min_gradient_pct": -14.745808542618533
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.080574498038004,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1539.0,
   "end_distance_m": 1589.0,
   "start_elevation_m": 129.4524015833073,
   "end_elevation_m": 137.9926888323263,
   "min_gradient_pct": -10.441799949305645
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.621465947368138,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1488.0,
   "end_distance_m": 1588.0,
   "start_elevation_m": 122.23480803516753,
   "end_elevation_m": 137.85627398253567,
   "min_gradient_pct": -6.30203714004341
  }
 ],
 "shape": {
  "ascent_concentration": 0.434,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 96.0,
  "shape_class": "sustained"
 },
 "length_m": 2173.3355463190187,
 "start_elevation_m": 76.6689833653601,
 "end_elevation_m": 191.15365540039426,
 "endpoint_gain_m": 114.48467203503415,
 "overall_gradient_pct": 5.267694269710767,
 "accumulated_ascent_m": 136.60186963248884,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.36835643690199,
   "start_distance_m": 2121.0,
   "end_distance_m": 2126.0,
   "midpoint_distance_m": 2123.5,
   "start_elevation_m": 184.5165411050768,
   "end_elevation_m": 185.8849589269219,
   "start_xy": [
    360737.010235759,
    486320.90107404144
   ],
   "end_xy": [
    360732.75688495324,
    486318.27257600054
   ]
  },
  "max_10m": {
   "gradient_pct": 23.865377385858153,
   "start_distance_m": 2120.0,
   "end_distance_m": 2130.0,
   "midpoint_distance_m": 2125.0,
   "start_elevation_m": 184.35616228326106,
   "end_elevation_m": 186.74270002184687,
   "start_xy": [
    360737.86065927986,
    486321.42717268376
   ],
   "end_xy": [
    360729.35408013774,
    486316.16997785243
   ]
  },
  "max_20m": {
   "gradient_pct": 21.18151829382299,
   "start_distance_m": 1539.0,
   "end_distance_m": 1559.0,
   "midpoint_distance_m": 1549.0,
   "start_elevation_m": 129.4524015833073,
   "end_elevation_m": 133.6887052420719,
   "start_xy": [
    361278.55788168963,
    486437.8386374343
   ],
   "end_xy": [
    361258.63419058983,
    486439.4739942837
   ]
  },
  "max_25m": {
   "gradient_pct": 20.302376003024165,
   "start_distance_m": 1541.0,
   "end_distance_m": 1566.0,
   "midpoint_distance_m": 1553.5,
   "start_elevation_m": 129.76448806755585,
   "end_elevation_m": 134.8400820683119,
   "start_xy": [
    361276.5662520634,
    486438.0214227532
   ],
   "end_xy": [
    361251.63797083567,
    486439.2439870246
   ]
  },
  "max_50m": {
   "gradient_pct": 17.080574498038004,
   "start_distance_m": 1539.0,
   "end_distance_m": 1589.0,
   "midpoint_distance_m": 1564.0,
   "start_elevation_m": 129.4524015833073,
   "end_elevation_m": 137.9926888323263,
   "start_xy": [
    361278.55788168963,
    486437.8386374343
   ],
   "end_xy": [
    361228.75595082244,
    486437.50292365346
   ]
  },
  "max_100m": {
   "gradient_pct": 15.621465947368138,
   "start_distance_m": 1488.0,
   "end_distance_m": 1588.0,
   "midpoint_distance_m": 1538.0,
   "start_elevation_m": 122.23480803516753,
   "end_elevation_m": 137.85627398253567,
   "start_xy": [
    361329.46676471224,
    486437.848368179
   ],
   "end_xy": [
    361229.7387039569,
    486437.6878454501
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -21.455706766135165,
   "start_distance_m": 730.0,
   "end_distance_m": 735.0,
   "midpoint_distance_m": 732.5,
   "start_elevation_m": 87.94406052950826,
   "end_elevation_m": 86.8712751912015,
   "start_xy": [
    361705.556850527,
    487032.98284674005
   ],
   "end_xy": [
    361704.502801116,
    487028.0952118024
   ]
  },
  "min_10m": {
   "gradient_pct": -19.296737439002953,
   "start_distance_m": 730.0,
   "end_distance_m": 740.0,
   "midpoint_distance_m": 735.0,
   "start_elevation_m": 87.94406052950826,
   "end_elevation_m": 86.01438678560797,
   "start_xy": [
    361705.556850527,
    487032.98284674005
   ],
   "end_xy": [
    361703.5045966098,
    487023.19633949694
   ]
  },
  "min_20m": {
   "gradient_pct": -16.40817397524245,
   "start_distance_m": 724.0,
   "end_distance_m": 744.0,
   "midpoint_distance_m": 734.0,
   "start_elevation_m": 88.87914216282167,
   "end_elevation_m": 85.59750736777318,
   "start_xy": [
    361706.82273248624,
    487038.8477884908
   ],
   "end_xy": [
    361702.768649964,
    487019.2646245359
   ]
  },
  "min_25m": {
   "gradient_pct": -14.745808542618533,
   "start_distance_m": 724.0,
   "end_distance_m": 749.0,
   "midpoint_distance_m": 736.5,
   "start_elevation_m": 88.87914216282167,
   "end_elevation_m": 85.19269002716703,
   "start_xy": [
    361706.82273248624,
    487038.8477884908
   ],
   "end_xy": [
    361701.8487166568,
    487014.3499808347
   ]
  },
  "min_50m": {
   "gradient_pct": -10.441799949305645,
   "start_distance_m": 723.0,
   "end_distance_m": 773.0,
   "midpoint_distance_m": 748.0,
   "start_elevation_m": 88.94244002445593,
   "end_elevation_m": 83.72154004980311,
   "start_xy": [
    361707.0338110062,
    487039.8252575974
   ],
   "end_xy": [
    361697.4326750966,
    486990.75975880417
   ]
  },
  "min_100m": {
   "gradient_pct": -6.30203714004341,
   "start_distance_m": 697.0,
   "end_distance_m": 797.0,
   "midpoint_distance_m": 747.0,
   "start_elevation_m": 89.73955300953979,
   "end_elevation_m": 83.43751586949638,
   "start_xy": [
    361711.36004946026,
    487065.438291242
   ],
   "end_xy": [
    361691.2145894439,
    486967.6041352702
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 46.980353623600024,
   "start_distance_m": 1541.0,
   "end_distance_m": 1543.0,
   "midpoint_distance_m": 1542.0,
   "start_elevation_m": 129.76448806755585,
   "end_elevation_m": 130.70409514002785,
   "start_xy": [
    361276.5662520634,
    486438.0214227532
   ],
   "end_xy": [
    361274.5746404053,
    486438.20440374187
   ]
  },
  "max_3m": {
   "gradient_pct": 35.63381586183425,
   "start_distance_m": 1540.0,
   "end_distance_m": 1543.0,
   "midpoint_distance_m": 1541.5,
   "start_elevation_m": 129.63508066417282,
   "end_elevation_m": 130.70409514002785,
   "start_xy": [
    361277.5621041903,
    486437.93043626373
   ],
   "end_xy": [
    361274.5746404053,
    486438.20440374187
   ]
  }
 },
 "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": 0.003,
   "windows_resited": [
    3.0,
    5.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    2.0,
    3.0
   ],
   "minima_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.01,
   "windows_resited": [
    5.0,
    10.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 10.0,
     "start_m": 1670.0,
     "end_m": 1680.0,
     "raw_pct": 24.29,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": [],
   "unstable": [
    {
     "window_m": 25.0,
     "start_m": 1541.0,
     "end_m": 1566.0,
     "raw_pct": 20.3,
     "reason": "hump",
     "perturbations": [
      "phase+0.000/mask+0",
      "phase+0.333/mask+1",
      "phase+0.667/mask-1"
     ],
     "perturbation_reasons": [
      "hump",
      "hump",
      ""
     ]
    }
   ]
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.011,
   "obstruction_max_height_m": 8.74,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    325.0,
    330.0
   ],
   [
    1668.0,
    1682.0
   ]
  ],
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "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-chunk001.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/E360000_N486000_2000m.tif",
   "data/cache/england/dtm_1m/E362000_N486000_2000m.tif",
   "data/cache/england/dtm_1m/E360000_N488000_2000m.tif",
   "data/cache/england/dtm_1m/E362000_N488000_2000m.tif"
  ],
  "calculated_at": "2026-09-22T00:20:03+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/valley-260921/uk/batch-england-chunk001.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": [
   "E360000_N486000_2000m.tif",
   "E362000_N486000_2000m.tif",
   "E360000_N488000_2000m.tif",
   "E362000_N488000_2000m.tif"
  ],
  "route_base_cut_m": 1570.0,
  "climb_origin": "discovered",
  "trimmed_from": "discovered-lane-54-2807-2-5890",
  "trim_cut_m": [
   [
    3743.6,
    3799.7
   ]
  ],
  "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-54-2807-2-5890",
   "calculated_at": "2026-09-01T14:27:18+00:00",
   "code_git_sha": null,
   "analysis_version": "0.1.0",
   "run_id": "chunk-07-260901",
   "path": "/root/uk-climbs/output/valley-260921/uk/priors/discovered-lane-54-2807-2-5890/discovered-lane-54-2807-2-5890.json",
   "spans": 3,
   "sources": [
    "excluded_ranges_m"
   ]
  },
  "suppression_unstable": [
   25.0
  ],
  "carriageway": {
   "stations": 93,
   "stations_resolved": 93,
   "width_median_m": 3.75,
   "width_p10_m": 2.25,
   "width_min_m": 1.0,
   "width_max_m": 12.0,
   "bounded_share": 0.269,
   "unbounded_share": 0.731,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.0,
   "window_m": [
    1541.0,
    1566.0
   ],
   "width_at_max25_m": 3.5,
   "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": 93,
    "stations_resolved": 93,
    "width_median_m": 4.75,
    "width_p10_m": 3.0,
    "width_min_m": 1.25,
    "width_max_m": 12.0,
    "bounded_share": 0.882,
    "unbounded_share": 0.118,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.5,
    "window_m": [
     1541.0,
     1566.0
    ],
    "width_at_max25_m": 4.5,
    "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 (1570.0 m -> 3744.0 m)",
   "published_max25_pct": 20.21,
   "max25_pct": 20.3
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Head of Blea Wheel",
  "county": "Westmorland and Furness"
 }
}