{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.9067, 6.6196)",
 "slug": "discovered-lane-44-9067-6-6196",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 48.39203312895961,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 848.0,
   "end_distance_m": 850.0,
   "start_elevation_m": 1326.8133804629738,
   "end_elevation_m": 1327.781221125553,
   "min_gradient_pct": -118.93245618950914,
   "suppressed_max_gradient_pct": 119.87434436350668,
   "suppressed_location_m": [
    405.0,
    407.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.52652521062313,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 847.0,
   "end_distance_m": 850.0,
   "start_elevation_m": 1326.6854253692343,
   "end_elevation_m": 1327.781221125553,
   "min_gradient_pct": -76.39251851625583,
   "suppressed_max_gradient_pct": 88.14131635597278,
   "suppressed_location_m": [
    405.0,
    408.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.029397252027593,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 941.0,
   "end_distance_m": 946.0,
   "start_elevation_m": 1335.9020741516672,
   "end_elevation_m": 1337.2035440142686,
   "min_gradient_pct": -43.29418334512411,
   "suppressed_max_gradient_pct": 53.45798748694051,
   "suppressed_location_m": [
    405.0,
    410.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.796076240970706,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 942.0,
   "end_distance_m": 952.0,
   "start_elevation_m": 1336.1386430538687,
   "end_elevation_m": 1338.6182506779658,
   "min_gradient_pct": -18.60284098563625,
   "suppressed_max_gradient_pct": 27.435518210222654,
   "suppressed_location_m": [
    405.0,
    415.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.596777987495443,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 936.0,
   "end_distance_m": 956.0,
   "start_elevation_m": 1334.8469968764732,
   "end_elevation_m": 1339.5663524739723,
   "min_gradient_pct": -8.413933680319587
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.561958065084582,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 937.0,
   "end_distance_m": 962.0,
   "start_elevation_m": 1335.0480185280444,
   "end_elevation_m": 1340.6885080443155,
   "min_gradient_pct": -6.77864188365038
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.27783209957397,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 936.0,
   "end_distance_m": 986.0,
   "start_elevation_m": 1334.8469968764732,
   "end_elevation_m": 1344.4859129262602,
   "min_gradient_pct": -2.877238771462089
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.357218457257432,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 935.0,
   "end_distance_m": 1035.0,
   "start_elevation_m": 1334.7281693951936,
   "end_elevation_m": 1350.085387852451,
   "min_gradient_pct": 1.3677871417730785
  }
 ],
 "shape": {
  "ascent_concentration": 0.376,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 81.0,
  "shape_class": "sustained"
 },
 "length_m": 1078.3632220766608,
 "start_elevation_m": 1279.9690283745124,
 "end_elevation_m": 1354.5980453866894,
 "endpoint_gain_m": 74.62901701217697,
 "overall_gradient_pct": 6.920582553664984,
 "accumulated_ascent_m": 80.28539050623385,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.029397252027593,
   "start_distance_m": 941.0,
   "end_distance_m": 946.0,
   "midpoint_distance_m": 943.5,
   "start_elevation_m": 1335.9020741516672,
   "end_elevation_m": 1337.2035440142686,
   "start_xy": [
    985506.9592227108,
    6429694.386043659
   ],
   "end_xy": [
    985504.1094944932,
    6429698.486791426
   ]
  },
  "max_10m": {
   "gradient_pct": 24.796076240970706,
   "start_distance_m": 942.0,
   "end_distance_m": 952.0,
   "midpoint_distance_m": 947.0,
   "start_elevation_m": 1336.1386430538687,
   "end_elevation_m": 1338.6182506779658,
   "start_xy": [
    985506.4001126154,
    6429695.215137081
   ],
   "end_xy": [
    985499.8609671628,
    6429702.7235372905
   ]
  },
  "max_20m": {
   "gradient_pct": 23.596777987495443,
   "start_distance_m": 936.0,
   "end_distance_m": 956.0,
   "midpoint_distance_m": 946.0,
   "start_elevation_m": 1334.8469968764732,
   "end_elevation_m": 1339.5663524739723,
   "start_xy": [
    985508.7514522837,
    6429689.800895568
   ],
   "end_xy": [
    985497.593747036,
    6429705.865960418
   ]
  },
  "max_25m": {
   "gradient_pct": 22.561958065084582,
   "start_distance_m": 937.0,
   "end_distance_m": 962.0,
   "midpoint_distance_m": 949.5,
   "start_elevation_m": 1335.0480185280444,
   "end_elevation_m": 1340.6885080443155,
   "start_xy": [
    985508.52082073,
    6429690.7739367215
   ],
   "end_xy": [
    985496.2773629156,
    6429711.709651737
   ]
  },
  "max_50m": {
   "gradient_pct": 19.27783209957397,
   "start_distance_m": 936.0,
   "end_distance_m": 986.0,
   "midpoint_distance_m": 961.0,
   "start_elevation_m": 1334.8469968764732,
   "end_elevation_m": 1344.4859129262602,
   "start_xy": [
    985508.7514522837,
    6429689.800895568
   ],
   "end_xy": [
    985501.9130529742,
    6429734.809238316
   ]
  },
  "max_100m": {
   "gradient_pct": 15.357218457257432,
   "start_distance_m": 935.0,
   "end_distance_m": 1035.0,
   "midpoint_distance_m": 985.0,
   "start_elevation_m": 1334.7281693951936,
   "end_elevation_m": 1350.085387852451,
   "start_xy": [
    985508.9820838373,
    6429688.8278544145
   ],
   "end_xy": [
    985503.479378113,
    6429782.062530074
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -43.29418334512411,
   "start_distance_m": 400.0,
   "end_distance_m": 405.0,
   "midpoint_distance_m": 402.5,
   "start_elevation_m": 1299.5407935368057,
   "end_elevation_m": 1297.3760843695495,
   "start_xy": [
    985653.320251078,
    6429679.508981054
   ],
   "end_xy": [
    985648.9827985041,
    6429681.920058817
   ]
  },
  "min_10m": {
   "gradient_pct": -18.60284098563625,
   "start_distance_m": 395.0,
   "end_distance_m": 405.0,
   "midpoint_distance_m": 400.0,
   "start_elevation_m": 1299.2363684681131,
   "end_elevation_m": 1297.3760843695495,
   "start_xy": [
    985658.0511845108,
    6429677.890874489
   ],
   "end_xy": [
    985648.9827985041,
    6429681.920058817
   ]
  },
  "min_20m": {
   "gradient_pct": -8.413933680319587,
   "start_distance_m": 88.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 98.0,
   "start_elevation_m": 1283.294950381742,
   "end_elevation_m": 1281.612163645678,
   "start_xy": [
    985811.1072063833,
    6429582.193345909
   ],
   "end_xy": [
    985797.4849218674,
    6429596.808453131
   ]
  },
  "min_25m": {
   "gradient_pct": -6.77864188365038,
   "start_distance_m": 82.0,
   "end_distance_m": 107.0,
   "midpoint_distance_m": 94.5,
   "start_elevation_m": 1283.2829111602548,
   "end_elevation_m": 1281.5882506893422,
   "start_xy": [
    985815.2629187871,
    6429577.86552262
   ],
   "end_xy": [
    985798.0580918343,
    6429595.989016623
   ]
  },
  "min_50m": {
   "gradient_pct": -2.877238771462089,
   "start_distance_m": 72.0,
   "end_distance_m": 122.0,
   "midpoint_distance_m": 97.0,
   "start_elevation_m": 1283.2996413000308,
   "end_elevation_m": 1281.8610219142997,
   "start_xy": [
    985822.317984366,
    6429570.778991525
   ],
   "end_xy": [
    985787.6218498644,
    6429603.8784092525
   ]
  },
  "min_100m": {
   "gradient_pct": 1.3677871417730785,
   "start_distance_m": 305.0,
   "end_distance_m": 405.0,
   "midpoint_distance_m": 355.0,
   "start_elevation_m": 1296.0082972277764,
   "end_elevation_m": 1297.3760843695495,
   "start_xy": [
    985726.2359104729,
    6429639.606728394
   ],
   "end_xy": [
    985648.9827985041,
    6429681.920058817
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 48.39203312895961,
   "start_distance_m": 848.0,
   "end_distance_m": 850.0,
   "midpoint_distance_m": 849.0,
   "start_elevation_m": 1326.8133804629738,
   "end_elevation_m": 1327.781221125553,
   "start_xy": [
    985555.9542097382,
    6429622.739284764
   ],
   "end_xy": [
    985555.2226933965,
    6429624.600704609
   ]
  },
  "max_3m": {
   "gradient_pct": 36.52652521062313,
   "start_distance_m": 847.0,
   "end_distance_m": 850.0,
   "midpoint_distance_m": 848.5,
   "start_elevation_m": 1326.6854253692343,
   "end_elevation_m": 1327.781221125553,
   "start_xy": [
    985556.319967909,
    6429621.808574841
   ],
   "end_xy": [
    985555.2226933965,
    6429624.600704609
   ]
  }
 },
 "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": 0.008,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.22,
   "obstruction_max_height_m": 21.06,
   "flagged_windows_m": [
    2,
    3,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    401.0,
    409.0
   ]
  ],
  "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:2154",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
   "data/cache/fr/ign-lidarhd_dtm_E985-N6429_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:38:45+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": [
   "E985-N6429"
  ],
  "elevation_blocks": [
   "21LHD8QN@2025-02-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0985_6430_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8QN"
  ],
  "ign_editions": [
   "2025-02-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0985_6430_MNT_O_0M50_LAMB93_IGN69": "2025-02-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 50,
   "stations_resolved": 50,
   "width_median_m": 4.5,
   "width_p10_m": 2.95,
   "width_min_m": 2.0,
   "width_max_m": 11.5,
   "bounded_share": 0.54,
   "unbounded_share": 0.46,
   "confidence_median": 0.577,
   "width_median_bounded_m": 4.5,
   "window_m": [
    937.0,
    962.0
   ],
   "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": 50,
    "stations_resolved": 50,
    "width_median_m": 3.38,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 11.0,
    "bounded_share": 0.9,
    "unbounded_share": 0.1,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.75,
    "window_m": [
     937.0,
     962.0
    ],
    "width_at_max25_m": 2.75,
    "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": "Brian\u00e7on",
  "county": "Hautes-Alpes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}