{
 "ocl_version": "0.1.0",
 "name": "Col de Chamaroux from Le Saillant",
 "slug": "col-de-chamaroux-from-le-saillant",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 9.294266882636748,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 838.0,
   "end_distance_m": 840.0,
   "start_elevation_m": 1216.1146562418157,
   "end_elevation_m": 1216.3005415794685,
   "min_gradient_pct": -4.5983869188830795,
   "suppressed_max_gradient_pct": 129.59275042485388,
   "suppressed_location_m": [
    3249.0,
    3251.0
   ],
   "suppressed_min_gradient_pct": -129.11729823417772,
   "suppressed_min_location_m": [
    3247.0,
    3249.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 9.332434700869877,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 838.0,
   "end_distance_m": 841.0,
   "start_elevation_m": 1216.1146562418157,
   "end_elevation_m": 1216.3946292828418,
   "min_gradient_pct": -3.5480586636064495,
   "suppressed_max_gradient_pct": 86.06551078317655,
   "suppressed_location_m": [
    3249.0,
    3252.0
   ],
   "suppressed_min_gradient_pct": -86.41162971830454,
   "suppressed_min_location_m": [
    3246.0,
    3249.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 8.11262220880053,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 836.0,
   "end_distance_m": 841.0,
   "start_elevation_m": 1215.9889981724018,
   "end_elevation_m": 1216.3946292828418,
   "min_gradient_pct": -3.2971407144668774,
   "suppressed_max_gradient_pct": 51.823268514172014,
   "suppressed_location_m": [
    3249.0,
    3254.0
   ],
   "suppressed_min_gradient_pct": -52.466862226960984,
   "suppressed_min_location_m": [
    3244.0,
    3249.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 7.969824087197139,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 831.0,
   "end_distance_m": 841.0,
   "start_elevation_m": 1215.5976468741221,
   "end_elevation_m": 1216.3946292828418,
   "min_gradient_pct": -2.8301339312497475,
   "suppressed_max_gradient_pct": 25.82312831844547,
   "suppressed_location_m": [
    3249.0,
    3259.0
   ],
   "suppressed_min_gradient_pct": -26.810391006054033,
   "suppressed_min_location_m": [
    3239.0,
    3249.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 7.525134858256024,
   "diagnostic": false,
   "flags": [
    "structure_excluded_min"
   ],
   "start_distance_m": 821.0,
   "end_distance_m": 841.0,
   "start_elevation_m": 1214.8896023111906,
   "end_elevation_m": 1216.3946292828418,
   "min_gradient_pct": -2.6832459109198226,
   "suppressed_min_gradient_pct": -14.283310290051077,
   "suppressed_min_location_m": [
    3229.0,
    3249.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 7.468422830105737,
   "diagnostic": false,
   "flags": [
    "structure_excluded_min"
   ],
   "start_distance_m": 315.0,
   "end_distance_m": 340.0,
   "start_elevation_m": 1183.4836709124725,
   "end_elevation_m": 1185.350776619999,
   "min_gradient_pct": -2.5030316256443257,
   "suppressed_min_gradient_pct": -11.769287965924377,
   "suppressed_min_location_m": [
    3224.0,
    3249.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 7.253970648048835,
   "diagnostic": false,
   "flags": [
    "structure_excluded_min"
   ],
   "start_distance_m": 299.0,
   "end_distance_m": 349.0,
   "start_elevation_m": 1182.3442252338828,
   "end_elevation_m": 1185.9712105579072,
   "min_gradient_pct": -1.942239212131426,
   "suppressed_min_gradient_pct": -6.844209099333966,
   "suppressed_min_location_m": [
    3199.0,
    3249.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 6.928857060951714,
   "diagnostic": false,
   "flags": [
    "structure_excluded_min"
   ],
   "start_distance_m": 250.0,
   "end_distance_m": 350.0,
   "start_elevation_m": 1179.1150803224043,
   "end_elevation_m": 1186.043937383356,
   "min_gradient_pct": -1.443743913715025,
   "suppressed_min_gradient_pct": -3.9307129930157316,
   "suppressed_min_location_m": [
    3149.0,
    3249.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.392,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 10.0,
  "shape_class": "sustained"
 },
 "length_m": 3265.9212309819873,
 "start_elevation_m": 1169.5343430996115,
 "end_elevation_m": 1291.3178728979442,
 "endpoint_gain_m": 121.78352979833267,
 "overall_gradient_pct": 3.7289181577020205,
 "accumulated_ascent_m": 130.33084121105412,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 8.11262220880053,
   "start_distance_m": 836.0,
   "end_distance_m": 841.0,
   "midpoint_distance_m": 838.5,
   "start_elevation_m": 1215.9889981724018,
   "end_elevation_m": 1216.3946292828418,
   "start_xy": [
    693497.4741936849,
    6470684.321696439
   ],
   "end_xy": [
    693498.3464030396,
    6470679.3983590705
   ]
  },
  "max_10m": {
   "gradient_pct": 7.969824087197139,
   "start_distance_m": 831.0,
   "end_distance_m": 841.0,
   "midpoint_distance_m": 836.0,
   "start_elevation_m": 1215.5976468741221,
   "end_elevation_m": 1216.3946292828418,
   "start_xy": [
    693496.60198433,
    6470689.245033807
   ],
   "end_xy": [
    693498.3464030396,
    6470679.3983590705
   ]
  },
  "max_20m": {
   "gradient_pct": 7.525134858256024,
   "start_distance_m": 821.0,
   "end_distance_m": 841.0,
   "midpoint_distance_m": 831.0,
   "start_elevation_m": 1214.8896023111906,
   "end_elevation_m": 1216.3946292828418,
   "start_xy": [
    693494.294610711,
    6470698.95120597
   ],
   "end_xy": [
    693498.3464030396,
    6470679.3983590705
   ]
  },
  "max_25m": {
   "gradient_pct": 7.468422830105737,
   "start_distance_m": 315.0,
   "end_distance_m": 340.0,
   "midpoint_distance_m": 327.5,
   "start_elevation_m": 1183.4836709124725,
   "end_elevation_m": 1185.350776619999,
   "start_xy": [
    693019.7059097788,
    6470635.849383555
   ],
   "end_xy": [
    693044.4555957044,
    6470639.378270999
   ]
  },
  "max_50m": {
   "gradient_pct": 7.253970648048835,
   "start_distance_m": 299.0,
   "end_distance_m": 349.0,
   "midpoint_distance_m": 324.0,
   "start_elevation_m": 1182.3442252338828,
   "end_elevation_m": 1185.9712105579072,
   "start_xy": [
    693004.1529127221,
    6470632.468323278
   ],
   "end_xy": [
    693053.3905833922,
    6470640.443179803
   ]
  },
  "max_100m": {
   "gradient_pct": 6.928857060951714,
   "start_distance_m": 250.0,
   "end_distance_m": 350.0,
   "midpoint_distance_m": 300.0,
   "start_elevation_m": 1179.1150803224043,
   "end_elevation_m": 1186.043937383356,
   "start_xy": [
    692961.0687273525,
    6470609.4152647825
   ],
   "end_xy": [
    693054.3854399419,
    6470640.54447366
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.2971407144668774,
   "start_distance_m": 3099.0,
   "end_distance_m": 3104.0,
   "midpoint_distance_m": 3101.5,
   "start_elevation_m": 1293.336742129065,
   "end_elevation_m": 1293.1718850933416,
   "start_xy": [
    695288.8581583443,
    6471132.054600288
   ],
   "end_xy": [
    695293.731874917,
    6471133.17124113
   ]
  },
  "min_10m": {
   "gradient_pct": -2.8301339312497475,
   "start_distance_m": 3196.0,
   "end_distance_m": 3206.0,
   "midpoint_distance_m": 3201.0,
   "start_elevation_m": 1292.219018274452,
   "end_elevation_m": 1291.936004881327,
   "start_xy": [
    695379.7546062785,
    6471157.266049287
   ],
   "end_xy": [
    695388.0335041202,
    6471162.787554567
   ]
  },
  "min_20m": {
   "gradient_pct": -2.6832459109198226,
   "start_distance_m": 3193.0,
   "end_distance_m": 3213.0,
   "midpoint_distance_m": 3203.0,
   "start_elevation_m": 1292.2919154547687,
   "end_elevation_m": 1291.7552662725848,
   "start_xy": [
    695377.4485040843,
    6471155.347223431
   ],
   "end_xy": [
    695394.1901536444,
    6471166.118570423
   ]
  },
  "min_25m": {
   "gradient_pct": -2.5030316256443257,
   "start_distance_m": 3190.0,
   "end_distance_m": 3215.0,
   "midpoint_distance_m": 3202.5,
   "start_elevation_m": 1292.3514494863477,
   "end_elevation_m": 1291.7256915799367,
   "start_xy": [
    695375.14240189,
    6471153.4283975735
   ],
   "end_xy": [
    695395.9491963657,
    6471167.070289239
   ]
  },
  "min_50m": {
   "gradient_pct": -1.942239212131426,
   "start_distance_m": 3187.0,
   "end_distance_m": 3237.0,
   "midpoint_distance_m": 3212.0,
   "start_elevation_m": 1292.3851364763282,
   "end_elevation_m": 1291.4140168702625,
   "start_xy": [
    695372.6754026186,
    6471151.729157542
   ],
   "end_xy": [
    695416.8859623427,
    6471168.36575798
   ]
  },
  "min_100m": {
   "gradient_pct": -1.443743913715025,
   "start_distance_m": 3043.0,
   "end_distance_m": 3143.0,
   "midpoint_distance_m": 3093.0,
   "start_elevation_m": 1294.1326851876752,
   "end_elevation_m": 1292.6889412739602,
   "start_xy": [
    695255.1249649356,
    6471087.972815012
   ],
   "end_xy": [
    695332.4536121389,
    6471135.68752875
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 9.294266882636748,
   "start_distance_m": 838.0,
   "end_distance_m": 840.0,
   "midpoint_distance_m": 839.0,
   "start_elevation_m": 1216.1146562418157,
   "end_elevation_m": 1216.3005415794685,
   "start_xy": [
    693497.8230774268,
    6470682.352361491
   ],
   "end_xy": [
    693498.1719611688,
    6470680.383026544
   ]
  },
  "max_3m": {
   "gradient_pct": 9.332434700869877,
   "start_distance_m": 838.0,
   "end_distance_m": 841.0,
   "midpoint_distance_m": 839.5,
   "start_elevation_m": 1216.1146562418157,
   "end_elevation_m": 1216.3946292828418,
   "start_xy": [
    693497.8230774268,
    6470682.352361491
   ],
   "end_xy": [
    693498.3464030396,
    6470679.3983590705
   ]
  }
 },
 "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": 0.002,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.003,
   "obstruction_max_height_m": 12.16,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    3245.0,
    3252.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "1cc9fdcd6556a02163cb21acb2293cad3067d2a1",
   "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": "fr-mc4",
   "road_pbf": "block-batch-fr-mc4.osm.pbf",
   "region_key": "france",
   "crs": "EPSG:2154",
   "elevation_provider_key": "ign-lidarhd",
   "tile_index": "wms-grid",
   "authority": "bdtopo",
   "registry_pbf": "france-vosges-2026-09-16.osm.pbf",
   "tile_index_snapshot": "sha256:af4eae1f5df9e232"
  },
  "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_E692-N6470_0m5@21LHD4LM-2025-06-26.tif",
   "data/cache/fr/ign-lidarhd_dtm_E693-N6470_0m5@21LHD4LM-2025-06-26.tif",
   "data/cache/fr/ign-lidarhd_dtm_E694-N6470_0m5@21LHD4LM-2025-06-26.tif",
   "data/cache/fr/ign-lidarhd_dtm_E694-N6471_0m5@21LHD4LM-2025-06-26.tif",
   "data/cache/fr/ign-lidarhd_dtm_E695-N6470_0m5@21LHD4LM-2025-06-26.tif",
   "data/cache/fr/ign-lidarhd_dtm_E695-N6471_0m5@21LHD4LM-2025-06-26.tif"
  ],
  "calculated_at": "2026-09-22T18:41:44+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc4",
  "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": [
   "E692-N6470",
   "E693-N6470",
   "E694-N6470",
   "E694-N6471",
   "E695-N6470",
   "E695-N6471"
  ],
  "elevation_blocks": [
   "21LHD4LM@2025-06-26"
  ],
  "ign_dalles": [
   "LHD_FXX_0692_6471_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0693_6471_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0694_6471_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0694_6472_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0695_6471_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0695_6472_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD4LM"
  ],
  "ign_editions": [
   "2025-06-26"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0692_6471_MNT_O_0M50_LAMB93_IGN69": "2025-06-26",
   "LHD_FXX_0693_6471_MNT_O_0M50_LAMB93_IGN69": "2025-06-26",
   "LHD_FXX_0694_6471_MNT_O_0M50_LAMB93_IGN69": "2025-06-26",
   "LHD_FXX_0694_6472_MNT_O_0M50_LAMB93_IGN69": "2025-06-26",
   "LHD_FXX_0695_6471_MNT_O_0M50_LAMB93_IGN69": "2025-06-26",
   "LHD_FXX_0695_6472_MNT_O_0M50_LAMB93_IGN69": "2025-06-26"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": 3,
  "carriageway": {
   "stations": 136,
   "stations_resolved": 136,
   "width_median_m": 6.0,
   "width_p10_m": 5.0,
   "width_min_m": 2.5,
   "width_max_m": 12.0,
   "bounded_share": 0.294,
   "unbounded_share": 0.706,
   "confidence_median": 0.0,
   "width_median_bounded_m": 6.25,
   "window_m": [
    315.0,
    340.0
   ],
   "width_at_max25_m": 6.75,
   "window_stations": 6,
   "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": 136,
    "stations_resolved": 136,
    "width_median_m": 10.12,
    "width_p10_m": 7.62,
    "width_min_m": 4.5,
    "width_max_m": 12.0,
    "bounded_share": 0.301,
    "unbounded_share": 0.699,
    "confidence_median": 0.0,
    "width_median_bounded_m": 8.5,
    "window_m": [
     315.0,
     340.0
    ],
    "width_at_max25_m": 12.0,
    "window_stations": 6,
    "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": "Marcenat",
  "county": "Cantal",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}