{
 "ocl_version": "0.1.0",
 "name": "Col de la Colombi\u00e8re from Le Chinaillon",
 "slug": "col-de-la-colombiere-from-le-chinaillon",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 11.911682252616629,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3857.0,
   "end_distance_m": 3859.0,
   "start_elevation_m": 1574.8811595615925,
   "end_elevation_m": 1575.1193932066449,
   "min_gradient_pct": -104.8565376167403,
   "suppressed_max_gradient_pct": 161.43774887816562,
   "suppressed_location_m": [
    2927.0,
    2929.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 11.946716294354095,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3857.0,
   "end_distance_m": 3860.0,
   "start_elevation_m": 1574.8811595615925,
   "end_elevation_m": 1575.2395610504232,
   "min_gradient_pct": -102.46637116952115,
   "suppressed_max_gradient_pct": 161.35445396231867,
   "suppressed_location_m": [
    2926.0,
    2929.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 11.404977389793203,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3855.0,
   "end_distance_m": 3860.0,
   "start_elevation_m": 1574.6693121809335,
   "end_elevation_m": 1575.2395610504232,
   "min_gradient_pct": -96.08730715733145,
   "suppressed_max_gradient_pct": 143.72335065847437,
   "suppressed_location_m": [
    2926.0,
    2931.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 10.94990798286517,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3850.0,
   "end_distance_m": 3860.0,
   "start_elevation_m": 1574.1445702521366,
   "end_elevation_m": 1575.2395610504232,
   "min_gradient_pct": -92.47473590411573,
   "suppressed_max_gradient_pct": 95.54210199331237,
   "suppressed_location_m": [
    2990.0,
    3000.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 10.577439509613669,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3846.0,
   "end_distance_m": 3866.0,
   "start_elevation_m": 1573.736064816914,
   "end_elevation_m": 1575.8515527188367,
   "min_gradient_pct": -63.51996594005868,
   "suppressed_max_gradient_pct": 76.52433583343509,
   "suppressed_location_m": [
    2987.0,
    3007.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 10.385078786684971,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 3841.0,
   "end_distance_m": 3866.0,
   "start_elevation_m": 1573.2552830221655,
   "end_elevation_m": 1575.8515527188367,
   "min_gradient_pct": -49.49520990710971,
   "suppressed_max_gradient_pct": 62.67326742276509,
   "suppressed_location_m": [
    2987.0,
    3012.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 9.967385458761328,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 4069.0,
   "end_distance_m": 4119.0,
   "start_elevation_m": 1595.0342224163871,
   "end_elevation_m": 1600.0179151457678,
   "min_gradient_pct": -22.08836040429651,
   "suppressed_max_gradient_pct": 34.51477042529814,
   "suppressed_location_m": [
    2987.0,
    3037.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 9.779884819398376,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 4032.0,
   "end_distance_m": 4132.0,
   "start_elevation_m": 1591.4741987259913,
   "end_elevation_m": 1601.2540835453897,
   "min_gradient_pct": -7.918914588778989,
   "suppressed_max_gradient_pct": 20.357321529792216,
   "suppressed_location_m": [
    2987.0,
    3087.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.31,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 32.0,
  "shape_class": "sustained"
 },
 "length_m": 4229.309678870381,
 "start_elevation_m": 1305.4375593872096,
 "end_elevation_m": 1607.9836074609348,
 "endpoint_gain_m": 302.54604807372516,
 "overall_gradient_pct": 7.153556278587128,
 "accumulated_ascent_m": 322.89026200293347,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 11.404977389793203,
   "start_distance_m": 3855.0,
   "end_distance_m": 3860.0,
   "midpoint_distance_m": 3857.5,
   "start_elevation_m": 1574.6693121809335,
   "end_elevation_m": 1575.2395610504232,
   "start_xy": [
    968617.688480446,
    6549352.379214761
   ],
   "end_xy": [
    968622.2577133628,
    6549354.4095129045
   ]
  },
  "max_10m": {
   "gradient_pct": 10.94990798286517,
   "start_distance_m": 3850.0,
   "end_distance_m": 3860.0,
   "midpoint_distance_m": 3855.0,
   "start_elevation_m": 1574.1445702521366,
   "end_elevation_m": 1575.2395610504232,
   "start_xy": [
    968613.1192475292,
    6549350.348916617
   ],
   "end_xy": [
    968622.2577133628,
    6549354.4095129045
   ]
  },
  "max_20m": {
   "gradient_pct": 10.577439509613669,
   "start_distance_m": 3846.0,
   "end_distance_m": 3866.0,
   "midpoint_distance_m": 3856.0,
   "start_elevation_m": 1573.736064816914,
   "end_elevation_m": 1575.8515527188367,
   "start_xy": [
    968609.4638611958,
    6549348.724678102
   ],
   "end_xy": [
    968627.5936592421,
    6549357.1495224675
   ]
  },
  "max_25m": {
   "gradient_pct": 10.385078786684971,
   "start_distance_m": 3841.0,
   "end_distance_m": 3866.0,
   "midpoint_distance_m": 3853.5,
   "start_elevation_m": 1573.2552830221655,
   "end_elevation_m": 1575.8515527188367,
   "start_xy": [
    968604.894628279,
    6549346.694379958
   ],
   "end_xy": [
    968627.5936592421,
    6549357.1495224675
   ]
  },
  "max_50m": {
   "gradient_pct": 9.967385458761328,
   "start_distance_m": 4069.0,
   "end_distance_m": 4119.0,
   "midpoint_distance_m": 4094.0,
   "start_elevation_m": 1595.0342224163871,
   "end_elevation_m": 1600.0179151457678,
   "start_xy": [
    968799.990268558,
    6549463.7152061
   ],
   "end_xy": [
    968846.0348417371,
    6549483.173213254
   ]
  },
  "max_100m": {
   "gradient_pct": 9.779884819398376,
   "start_distance_m": 4032.0,
   "end_distance_m": 4132.0,
   "midpoint_distance_m": 4082.0,
   "start_elevation_m": 1591.4741987259913,
   "end_elevation_m": 1601.2540835453897,
   "start_xy": [
    968767.1620909811,
    6549446.675801783
   ],
   "end_xy": [
    968858.0317365179,
    6549488.176241526
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -96.08730715733145,
   "start_distance_m": 2974.0,
   "end_distance_m": 2979.0,
   "midpoint_distance_m": 2976.5,
   "start_elevation_m": 1510.7995708286285,
   "end_elevation_m": 1505.995205470762,
   "start_xy": [
    968582.7803109471,
    6549112.560112967
   ],
   "end_xy": [
    968580.7447104079,
    6549117.122485885
   ]
  },
  "min_10m": {
   "gradient_pct": -92.47473590411573,
   "start_distance_m": 2973.0,
   "end_distance_m": 2983.0,
   "midpoint_distance_m": 2978.0,
   "start_elevation_m": 1511.7764312113793,
   "end_elevation_m": 1502.5289576209677,
   "start_xy": [
    968583.0620712179,
    6549111.600628132
   ],
   "end_xy": [
    968579.0702584888,
    6549120.755144797
   ]
  },
  "min_20m": {
   "gradient_pct": -63.51996594005868,
   "start_distance_m": 2967.0,
   "end_distance_m": 2987.0,
   "midpoint_distance_m": 2977.0,
   "start_elevation_m": 1512.5399930002864,
   "end_elevation_m": 1499.8359998122746,
   "start_xy": [
    968584.7526328432,
    6549105.843719118
   ],
   "end_xy": [
    968577.3958065695,
    6549124.387803709
   ]
  },
  "min_25m": {
   "gradient_pct": -49.49520990710971,
   "start_distance_m": 2962.0,
   "end_distance_m": 2987.0,
   "midpoint_distance_m": 2974.5,
   "start_elevation_m": 1512.209802289052,
   "end_elevation_m": 1499.8359998122746,
   "start_xy": [
    968586.1614341976,
    6549101.04629494
   ],
   "end_xy": [
    968577.3958065695,
    6549124.387803709
   ]
  },
  "min_50m": {
   "gradient_pct": -22.08836040429651,
   "start_distance_m": 2937.0,
   "end_distance_m": 2987.0,
   "midpoint_distance_m": 2962.0,
   "start_elevation_m": 1510.8801800144229,
   "end_elevation_m": 1499.8359998122746,
   "start_xy": [
    968589.5848742643,
    6549076.325400527
   ],
   "end_xy": [
    968577.3958065695,
    6549124.387803709
   ]
  },
  "min_100m": {
   "gradient_pct": -7.918914588778989,
   "start_distance_m": 2887.0,
   "end_distance_m": 2987.0,
   "midpoint_distance_m": 2937.0,
   "start_elevation_m": 1507.7549144010536,
   "end_elevation_m": 1499.8359998122746,
   "start_xy": [
    968578.9242220763,
    6549028.096353936
   ],
   "end_xy": [
    968577.3958065695,
    6549124.387803709
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 11.911682252616629,
   "start_distance_m": 3857.0,
   "end_distance_m": 3859.0,
   "midpoint_distance_m": 3858.0,
   "start_elevation_m": 1574.8811595615925,
   "end_elevation_m": 1575.1193932066449,
   "start_xy": [
    968619.5161736128,
    6549353.1913340185
   ],
   "end_xy": [
    968621.3438667795,
    6549354.003453275
   ]
  },
  "max_3m": {
   "gradient_pct": 11.946716294354095,
   "start_distance_m": 3857.0,
   "end_distance_m": 3860.0,
   "midpoint_distance_m": 3858.5,
   "start_elevation_m": 1574.8811595615925,
   "end_elevation_m": 1575.2395610504232,
   "start_xy": [
    968619.5161736128,
    6549353.1913340185
   ],
   "end_xy": [
    968622.2577133628,
    6549354.4095129045
   ]
  }
 },
 "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": 0.024,
   "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": 0.021,
   "obstruction_max_height_m": 17.19,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    0.0,
    20.0
   ],
   [
    2902.0,
    2941.0
   ],
   [
    2969.0,
    3009.0
   ]
  ],
  "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:2154",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
   "data/cache/fr/ign-lidarhd_dtm_E967-N6547_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E967-N6548_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E968-N6547_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E968-N6548_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E968-N6549_0m5.tif"
  ],
  "calculated_at": "2026-09-17T05:17:36+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps3",
  "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": [
   "E967-N6547",
   "E967-N6548",
   "E968-N6547",
   "E968-N6548",
   "E968-N6549"
  ],
  "elevation_blocks": [
   "21LHD5QK2@2025-06-13"
  ],
  "ign_dalles": [
   "LHD_FXX_0967_6548_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0967_6549_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0968_6548_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0968_6549_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0968_6550_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD5QK2"
  ],
  "ign_editions": [
   "2025-06-13"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0967_6548_MNT_O_0M50_LAMB93_IGN69": "2025-06-13",
   "LHD_FXX_0967_6549_MNT_O_0M50_LAMB93_IGN69": "2025-06-13",
   "LHD_FXX_0968_6548_MNT_O_0M50_LAMB93_IGN69": "2025-06-13",
   "LHD_FXX_0968_6549_MNT_O_0M50_LAMB93_IGN69": "2025-06-13",
   "LHD_FXX_0968_6550_MNT_O_0M50_LAMB93_IGN69": "2025-06-13"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": 9,
  "structure_mask_ranges_m": [
   [
    2907.3,
    2936.2
   ],
   [
    2974.4,
    3004.1
   ],
   [
    0.0,
    15.0
   ]
  ],
  "carriageway": {
   "stations": 176,
   "stations_resolved": 176,
   "width_median_m": 6.38,
   "width_p10_m": 5.0,
   "width_min_m": 3.5,
   "width_max_m": 11.25,
   "bounded_share": 0.358,
   "unbounded_share": 0.642,
   "confidence_median": 0.0,
   "width_median_bounded_m": 6.25,
   "window_m": [
    3841.0,
    3866.0
   ],
   "width_at_max25_m": 4.75,
   "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": 176,
    "stations_resolved": 176,
    "width_median_m": 8.62,
    "width_p10_m": 7.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.602,
    "unbounded_share": 0.398,
    "confidence_median": 1.0,
    "width_median_bounded_m": 8.0,
    "window_m": [
     3841.0,
     3866.0
    ],
    "width_at_max25_m": 6.5,
    "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
   }
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Le Grand-Bornand",
  "county": "Haute-Savoie",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}