{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (43.8912, 7.0054)",
 "slug": "discovered-lane-43-8912-7-0054",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 36.36773387739254,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 94.0,
   "end_distance_m": 96.0,
   "start_elevation_m": 696.7953296612266,
   "end_elevation_m": 697.5226843387744,
   "min_gradient_pct": -4.496911491310129
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 34.23086710173493,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 94.0,
   "end_distance_m": 97.0,
   "start_elevation_m": 696.7953296612266,
   "end_elevation_m": 697.8222556742786,
   "min_gradient_pct": -1.4803713188030088
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.745598880466332,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 92.0,
   "end_distance_m": 97.0,
   "start_elevation_m": 696.3849757302553,
   "end_elevation_m": 697.8222556742786,
   "min_gradient_pct": 2.624907785113919
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.206168829172384,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 76.0,
   "end_distance_m": 86.0,
   "start_elevation_m": 692.6065260200191,
   "end_elevation_m": 695.1271429029364,
   "min_gradient_pct": 3.617715148327534
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.872754303713123,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 77.0,
   "end_distance_m": 97.0,
   "start_elevation_m": 692.847704813536,
   "end_elevation_m": 697.8222556742786,
   "min_gradient_pct": 4.35849584236621
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.110219405152293,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 72.0,
   "end_distance_m": 97.0,
   "start_elevation_m": 691.7947008229905,
   "end_elevation_m": 697.8222556742786,
   "min_gradient_pct": 4.42870892177325
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.818006626072247,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 47.0,
   "end_distance_m": 97.0,
   "start_elevation_m": 686.9132523612425,
   "end_elevation_m": 697.8222556742786,
   "min_gradient_pct": 5.509229966054818
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.970902508791482,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 7.0,
   "end_distance_m": 107.0,
   "start_elevation_m": 681.217546295903,
   "end_elevation_m": 699.1884488046945,
   "min_gradient_pct": 6.5319726502924595
  }
 ],
 "shape": {
  "ascent_concentration": 0.455,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 105.0,
  "shape_class": "stepped"
 },
 "length_m": 210.5294573723082,
 "start_elevation_m": 680.9566405957272,
 "end_elevation_m": 706.0485719934076,
 "endpoint_gain_m": 25.091931397680355,
 "overall_gradient_pct": 11.918489560017647,
 "accumulated_ascent_m": 25.181869627506558,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.745598880466332,
   "start_distance_m": 92.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 94.5,
   "start_elevation_m": 696.3849757302553,
   "end_elevation_m": 697.8222556742786,
   "start_xy": [
    1021730.2227501437,
    6318456.565693439
   ],
   "end_xy": [
    1021729.5779382981,
    6318461.52394088
   ]
  },
  "max_10m": {
   "gradient_pct": 25.206168829172384,
   "start_distance_m": 76.0,
   "end_distance_m": 86.0,
   "midpoint_distance_m": 81.0,
   "start_elevation_m": 692.6065260200191,
   "end_elevation_m": 695.1271429029364,
   "start_xy": [
    1021732.5503829253,
    6318440.772080038
   ],
   "end_xy": [
    1021730.9965243584,
    6318450.61579651
   ]
  },
  "max_20m": {
   "gradient_pct": 24.872754303713123,
   "start_distance_m": 77.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 87.0,
   "start_elevation_m": 692.847704813536,
   "end_elevation_m": 697.8222556742786,
   "start_xy": [
    1021732.1571856805,
    6318441.690951117
   ],
   "end_xy": [
    1021729.5779382981,
    6318461.52394088
   ]
  },
  "max_25m": {
   "gradient_pct": 24.110219405152293,
   "start_distance_m": 72.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 84.5,
   "start_elevation_m": 691.7947008229905,
   "end_elevation_m": 697.8222556742786,
   "start_xy": [
    1021734.1382537406,
    6318437.100749725
   ],
   "end_xy": [
    1021729.5779382981,
    6318461.52394088
   ]
  },
  "max_50m": {
   "gradient_pct": 21.818006626072247,
   "start_distance_m": 47.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 72.0,
   "start_elevation_m": 686.9132523612425,
   "end_elevation_m": 697.8222556742786,
   "start_xy": [
    1021735.1392427242,
    6318413.679615123
   ],
   "end_xy": [
    1021729.5779382981,
    6318461.52394088
   ]
  },
  "max_100m": {
   "gradient_pct": 17.970902508791482,
   "start_distance_m": 7.0,
   "end_distance_m": 107.0,
   "midpoint_distance_m": 57.0,
   "start_elevation_m": 681.217546295903,
   "end_elevation_m": 699.1884488046945,
   "start_xy": [
    1021722.0591747045,
    6318388.818004148
   ],
   "end_xy": [
    1021728.288314607,
    6318471.440435762
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 2.624907785113919,
   "start_distance_m": 107.0,
   "end_distance_m": 112.0,
   "midpoint_distance_m": 109.5,
   "start_elevation_m": 699.1884488046945,
   "end_elevation_m": 699.3196941939502,
   "start_xy": [
    1021728.288314607,
    6318471.440435762
   ],
   "end_xy": [
    1021725.6123853949,
    6318472.5054576425
   ]
  },
  "min_10m": {
   "gradient_pct": 3.617715148327534,
   "start_distance_m": 133.0,
   "end_distance_m": 143.0,
   "midpoint_distance_m": 138.0,
   "start_elevation_m": 700.7941805509862,
   "end_elevation_m": 701.155952065819,
   "start_xy": [
    1021705.3793250377,
    6318467.955449364
   ],
   "end_xy": [
    1021695.483885903,
    6318467.504257376
   ]
  },
  "min_20m": {
   "gradient_pct": 4.35849584236621,
   "start_distance_m": 131.0,
   "end_distance_m": 151.0,
   "midpoint_distance_m": 141.0,
   "start_elevation_m": 700.6920916227697,
   "end_elevation_m": 701.5637907912429,
   "start_xy": [
    1021707.368661019,
    6318468.161707343
   ],
   "end_xy": [
    1021687.7943773246,
    6318469.711395302
   ]
  },
  "min_25m": {
   "gradient_pct": 4.42870892177325,
   "start_distance_m": 130.0,
   "end_distance_m": 155.0,
   "midpoint_distance_m": 142.5,
   "start_elevation_m": 700.6666790151046,
   "end_elevation_m": 701.7738562455479,
   "start_xy": [
    1021708.3633290097,
    6318468.264836331
   ],
   "end_xy": [
    1021683.995950631,
    6318470.945512205
   ]
  },
  "min_50m": {
   "gradient_pct": 5.509229966054818,
   "start_distance_m": 107.0,
   "end_distance_m": 157.0,
   "midpoint_distance_m": 132.0,
   "start_elevation_m": 699.1884488046945,
   "end_elevation_m": 701.9430637877219,
   "start_xy": [
    1021728.288314607,
    6318471.440435762
   ],
   "end_xy": [
    1021682.1557785856,
    6318471.728944936
   ]
  },
  "min_100m": {
   "gradient_pct": 6.5319726502924595,
   "start_distance_m": 107.0,
   "end_distance_m": 207.0,
   "midpoint_distance_m": 157.0,
   "start_elevation_m": 699.1884488046945,
   "end_elevation_m": 705.720421454987,
   "start_xy": [
    1021728.288314607,
    6318471.440435762
   ],
   "end_xy": [
    1021635.7893429797,
    6318488.791238096
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 36.36773387739254,
   "start_distance_m": 94.0,
   "end_distance_m": 96.0,
   "midpoint_distance_m": 95.0,
   "start_elevation_m": 696.7953296612266,
   "end_elevation_m": 697.5226843387744,
   "start_xy": [
    1021729.9648254054,
    6318458.548992416
   ],
   "end_xy": [
    1021729.7069006672,
    6318460.532291392
   ]
  },
  "max_3m": {
   "gradient_pct": 34.23086710173493,
   "start_distance_m": 94.0,
   "end_distance_m": 97.0,
   "midpoint_distance_m": 95.5,
   "start_elevation_m": 696.7953296612266,
   "end_elevation_m": 697.8222556742786,
   "start_xy": [
    1021729.9648254054,
    6318458.548992416
   ],
   "end_xy": [
    1021729.5779382981,
    6318461.52394088
   ]
  }
 },
 "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": 0.458,
   "obstruction_max_height_m": 19.68,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "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:2154",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
   "data/cache/fr/ign-lidarhd_dtm_E1021-N6318_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:11:34+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps4",
  "elevation_provider": "IGN LiDAR HD MNT 0.5 m",
  "elevation_licence": "Licence Ouverte / Open Licence 2.0 (Etalab) \u2014 \u00a9 IGN, LiDAR HD (MNT/MNS), data.geopf.fr; reproduction autoris\u00e9e avec mention de la source et de la date",
  "elevation_dataset": "LiDAR HD \u2014 MNT (sol) et MNS (surface), 0,50 m (Institut national de l'information g\u00e9ographique et foresti\u00e8re), RGF93 / Lambert-93 EPSG:2154, altitudes IGN69",
  "elevation_vertical_datum": "IGN69",
  "elevation_tile_ids": [
   "E1021-N6318"
  ],
  "elevation_blocks": [
   "21LHD8RP@2025-03-06"
  ],
  "ign_dalles": [
   "LHD_FXX_1021_6319_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8RP"
  ],
  "ign_editions": [
   "2025-03-06"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1021_6319_MNT_O_0M50_LAMB93_IGN69": "2025-03-06"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 15,
   "stations_resolved": 15,
   "width_median_m": 4.25,
   "width_p10_m": 2.6,
   "width_min_m": 1.25,
   "width_max_m": 7.5,
   "bounded_share": 0.067,
   "unbounded_share": 0.933,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.5,
   "window_m": [
    72.0,
    97.0
   ],
   "width_at_max25_m": 4.25,
   "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": 15,
    "stations_resolved": 15,
    "width_median_m": 2.25,
    "width_p10_m": 1.25,
    "width_min_m": 0.5,
    "width_max_m": 9.75,
    "bounded_share": 0.933,
    "unbounded_share": 0.067,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.12,
    "window_m": [
     72.0,
     97.0
    ],
    "width_at_max25_m": 2.25,
    "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
   }
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Cu\u00e9bris",
  "county": "Alpes-Maritimes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}