{
 "ocl_version": "0.1.0",
 "name": "Col de la Gachet from Sorbiers",
 "slug": "col-de-la-gachet-from-sorbiers",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 10.079302797578293,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 3375.0,
   "end_distance_m": 3377.0,
   "start_elevation_m": 615.0086606636792,
   "end_elevation_m": 615.2102467196307,
   "min_gradient_pct": -4.185757254316513,
   "suppressed_max_gradient_pct": 279.66699541427715,
   "suppressed_location_m": [
    1925.0,
    1927.0
   ],
   "suppressed_min_gradient_pct": -282.8640824804211,
   "suppressed_min_location_m": [
    1923.0,
    1925.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 10.057117391568227,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 3375.0,
   "end_distance_m": 3378.0,
   "start_elevation_m": 615.0086606636792,
   "end_elevation_m": 615.3103741854262,
   "min_gradient_pct": -3.9556505568308844,
   "suppressed_max_gradient_pct": 190.27171529203315,
   "suppressed_location_m": [
    1925.0,
    1928.0
   ],
   "suppressed_min_gradient_pct": -188.13946686636882,
   "suppressed_min_location_m": [
    1922.0,
    1925.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 9.637949266007126,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 3375.0,
   "end_distance_m": 3380.0,
   "start_elevation_m": 615.0086606636792,
   "end_elevation_m": 615.4905581269795,
   "min_gradient_pct": -3.6608755954330263,
   "suppressed_max_gradient_pct": 114.66540222805179,
   "suppressed_location_m": [
    1925.0,
    1930.0
   ],
   "suppressed_min_gradient_pct": -113.26484818211611,
   "suppressed_min_location_m": [
    1920.0,
    1925.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 9.160252462927474,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 3372.0,
   "end_distance_m": 3382.0,
   "start_elevation_m": 614.7429338428071,
   "end_elevation_m": 615.6589590890999,
   "min_gradient_pct": -3.129071997071833,
   "suppressed_max_gradient_pct": 57.13885746171968,
   "suppressed_location_m": [
    1925.0,
    1935.0
   ],
   "suppressed_min_gradient_pct": -56.15691254476474,
   "suppressed_min_location_m": [
    1915.0,
    1925.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 8.367545025757295,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 3372.0,
   "end_distance_m": 3392.0,
   "start_elevation_m": 614.7429338428071,
   "end_elevation_m": 616.4164428479586,
   "min_gradient_pct": -2.3251660299177956,
   "suppressed_max_gradient_pct": 28.509895584633114,
   "suppressed_location_m": [
    1925.0,
    1945.0
   ],
   "suppressed_min_gradient_pct": -27.982860818277686,
   "suppressed_min_location_m": [
    1905.0,
    1925.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 8.082912289862634,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 3361.0,
   "end_distance_m": 3386.0,
   "start_elevation_m": 613.9779337563184,
   "end_elevation_m": 615.9986618287841,
   "min_gradient_pct": -2.117892466212652,
   "suppressed_max_gradient_pct": 22.801320764591765,
   "suppressed_location_m": [
    1925.0,
    1950.0
   ],
   "suppressed_min_gradient_pct": -22.136175895608176,
   "suppressed_min_location_m": [
    1900.0,
    1925.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 7.4293824098947425,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 3356.0,
   "end_distance_m": 3406.0,
   "start_elevation_m": 613.61536661667,
   "end_elevation_m": 617.3300578216174,
   "min_gradient_pct": -1.742284322151363,
   "suppressed_max_gradient_pct": 12.524620096779472,
   "suppressed_location_m": [
    1925.0,
    1975.0
   ],
   "suppressed_min_gradient_pct": -10.385304101059319,
   "suppressed_min_location_m": [
    1875.0,
    1925.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 6.395541564318364,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 3351.0,
   "end_distance_m": 3451.0,
   "start_elevation_m": 613.3446539970932,
   "end_elevation_m": 619.7401955614116,
   "min_gradient_pct": -1.5502809347185575,
   "suppressed_max_gradient_pct": 8.635513696596718,
   "suppressed_location_m": [
    5780.0,
    5880.0
   ],
   "suppressed_min_gradient_pct": -3.9043031452887362,
   "suppressed_min_location_m": [
    1825.0,
    1925.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.331,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 12.0,
  "shape_class": "sustained"
 },
 "length_m": 6950.425421508258,
 "start_elevation_m": 535.0527149775367,
 "end_elevation_m": 748.2939492597578,
 "endpoint_gain_m": 213.24123428222117,
 "overall_gradient_pct": 3.0680313988024537,
 "accumulated_ascent_m": 228.5250148340259,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 9.637949266007126,
   "start_distance_m": 3375.0,
   "end_distance_m": 3380.0,
   "midpoint_distance_m": 3377.5,
   "start_elevation_m": 615.0086606636792,
   "end_elevation_m": 615.4905581269795,
   "start_xy": [
    813776.5640854404,
    6492878.515405294
   ],
   "end_xy": [
    813781.4713298893,
    6492877.556785495
   ]
  },
  "max_10m": {
   "gradient_pct": 9.160252462927474,
   "start_distance_m": 3372.0,
   "end_distance_m": 3382.0,
   "midpoint_distance_m": 3377.0,
   "start_elevation_m": 614.7429338428071,
   "end_elevation_m": 615.6589590890999,
   "start_xy": [
    813773.619738771,
    6492879.090577173
   ],
   "end_xy": [
    813783.4342276688,
    6492877.173337576
   ]
  },
  "max_20m": {
   "gradient_pct": 8.367545025757295,
   "start_distance_m": 3372.0,
   "end_distance_m": 3392.0,
   "midpoint_distance_m": 3382.0,
   "start_elevation_m": 614.7429338428071,
   "end_elevation_m": 616.4164428479586,
   "start_xy": [
    813773.619738771,
    6492879.090577173
   ],
   "end_xy": [
    813792.7587599134,
    6492873.808187503
   ]
  },
  "max_25m": {
   "gradient_pct": 8.082912289862634,
   "start_distance_m": 3361.0,
   "end_distance_m": 3386.0,
   "midpoint_distance_m": 3373.5,
   "start_elevation_m": 613.9779337563184,
   "end_elevation_m": 615.9986618287841,
   "start_xy": [
    813762.9335687325,
    6492878.651966666
   ],
   "end_xy": [
    813787.360023228,
    6492876.406441737
   ]
  },
  "max_50m": {
   "gradient_pct": 7.4293824098947425,
   "start_distance_m": 3356.0,
   "end_distance_m": 3406.0,
   "midpoint_distance_m": 3381.0,
   "start_elevation_m": 613.61536661667,
   "end_elevation_m": 617.3300578216174,
   "start_xy": [
    813758.1269665011,
    6492877.274804733
   ],
   "end_xy": [
    813805.3055534888,
    6492867.597070779
   ]
  },
  "max_100m": {
   "gradient_pct": 6.395541564318364,
   "start_distance_m": 3351.0,
   "end_distance_m": 3451.0,
   "midpoint_distance_m": 3401.0,
   "start_elevation_m": 613.3446539970932,
   "end_elevation_m": 619.7401955614116,
   "start_xy": [
    813753.3203642698,
    6492875.8976428
   ],
   "end_xy": [
    813849.2075075721,
    6492863.7109907465
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.6608755954330263,
   "start_distance_m": 7.0,
   "end_distance_m": 12.0,
   "midpoint_distance_m": 9.5,
   "start_elevation_m": 534.9816632360761,
   "end_elevation_m": 534.7986194563044,
   "start_xy": [
    812067.6992424475,
    6490198.322168805
   ],
   "end_xy": [
    812071.5404455009,
    6490201.419646106
   ]
  },
  "min_10m": {
   "gradient_pct": -3.129071997071833,
   "start_distance_m": 5.0,
   "end_distance_m": 15.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 535.0263824158286,
   "end_elevation_m": 534.7134752161214,
   "start_xy": [
    812065.9588874625,
    6490197.3366920035
   ],
   "end_xy": [
    812073.5442890188,
    6490203.652270381
   ]
  },
  "min_20m": {
   "gradient_pct": -2.3251660299177956,
   "start_distance_m": 3.0,
   "end_distance_m": 23.0,
   "midpoint_distance_m": 13.0,
   "start_elevation_m": 535.0651413469267,
   "end_elevation_m": 534.6001081409431,
   "start_xy": [
    812064.2185324775,
    6490196.351215201
   ],
   "end_xy": [
    812078.8878717335,
    6490209.605935116
   ]
  },
  "min_25m": {
   "gradient_pct": -2.117892466212652,
   "start_distance_m": 2.0,
   "end_distance_m": 27.0,
   "midpoint_distance_m": 14.5,
   "start_elevation_m": 535.0701209071954,
   "end_elevation_m": 534.5406477906422,
   "start_xy": [
    812063.348354985,
    6490195.858476801
   ],
   "end_xy": [
    812081.4017695297,
    6490212.709684991
   ]
  },
  "min_50m": {
   "gradient_pct": -1.742284322151363,
   "start_distance_m": 71.0,
   "end_distance_m": 121.0,
   "midpoint_distance_m": 96.0,
   "start_elevation_m": 534.1502396158588,
   "end_elevation_m": 533.2790974547831,
   "start_xy": [
    812104.1589500075,
    6490250.279562511
   ],
   "end_xy": [
    812124.8683407718,
    6490295.728254259
   ]
  },
  "min_100m": {
   "gradient_pct": -1.5502809347185575,
   "start_distance_m": 3.0,
   "end_distance_m": 103.0,
   "midpoint_distance_m": 53.0,
   "start_elevation_m": 535.0651413469267,
   "end_elevation_m": 533.5148604122081,
   "start_xy": [
    812064.2185324775,
    6490196.351215201
   ],
   "end_xy": [
    812118.3177057687,
    6490278.9746602
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 10.079302797578293,
   "start_distance_m": 3375.0,
   "end_distance_m": 3377.0,
   "midpoint_distance_m": 3376.0,
   "start_elevation_m": 615.0086606636792,
   "end_elevation_m": 615.2102467196307,
   "start_xy": [
    813776.5640854404,
    6492878.515405294
   ],
   "end_xy": [
    813778.5269832199,
    6492878.1319573745
   ]
  },
  "max_3m": {
   "gradient_pct": 10.057117391568227,
   "start_distance_m": 3375.0,
   "end_distance_m": 3378.0,
   "midpoint_distance_m": 3376.5,
   "start_elevation_m": 615.0086606636792,
   "end_elevation_m": 615.3103741854262,
   "start_xy": [
    813776.5640854404,
    6492878.515405294
   ],
   "end_xy": [
    813779.5084321097,
    6492877.940233415
   ]
  }
 },
 "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": 0.004,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "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": 0.011,
   "obstruction_max_height_m": 16.32,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    1918.0,
    1932.0
   ],
   [
    5773.0,
    5786.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "076a8e7f889cfb3c2cf6b3de65a6030c7155b1f0",
   "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-mc-cols",
   "road_pbf": "block-batch-fr-mc-cols.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_E812-N6490_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E812-N6491_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E812-N6492_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E813-N6491_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E813-N6492_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E813-N6493_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E814-N6492_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E814-N6493_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E815-N6493_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E815-N6494_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E816-N6493_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E816-N6494_0m5@22LHD4NL-2025-08-06.tif"
  ],
  "calculated_at": "2026-09-22T22:32:53+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc-cols.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc-cols",
  "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": [
   "E812-N6490",
   "E812-N6491",
   "E812-N6492",
   "E813-N6491",
   "E813-N6492",
   "E813-N6493",
   "E814-N6492",
   "E814-N6493",
   "E815-N6493",
   "E815-N6494",
   "E816-N6493",
   "E816-N6494"
  ],
  "elevation_blocks": [
   "22LHD4NL@2025-08-06"
  ],
  "ign_dalles": [
   "LHD_FXX_0812_6491_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0812_6492_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0812_6493_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0813_6492_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0813_6493_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0813_6494_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0814_6493_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0814_6494_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0815_6494_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0815_6495_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0816_6494_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0816_6495_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD4NL"
  ],
  "ign_editions": [
   "2025-08-06"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0812_6491_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0812_6492_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0812_6493_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0813_6492_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0813_6493_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0813_6494_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0814_6493_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0814_6494_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0815_6494_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0815_6495_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0816_6494_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0816_6495_MNT_O_0M50_LAMB93_IGN69": "2025-08-06"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": 6,
  "carriageway": {
   "stations": 285,
   "stations_resolved": 285,
   "width_median_m": 8.5,
   "width_p10_m": 6.6,
   "width_min_m": 2.25,
   "width_max_m": 12.0,
   "bounded_share": 0.151,
   "unbounded_share": 0.849,
   "confidence_median": 0.0,
   "width_median_bounded_m": 8.5,
   "window_m": [
    3361.0,
    3386.0
   ],
   "width_at_max25_m": 8.5,
   "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": 285,
    "stations_resolved": 285,
    "width_median_m": 10.75,
    "width_p10_m": 7.45,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.274,
    "unbounded_share": 0.726,
    "confidence_median": 0.0,
    "width_median_bounded_m": 9.12,
    "window_m": [
     3361.0,
     3386.0
    ],
    "width_at_max25_m": 8.75,
    "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": "Sorbiers",
  "county": "Loire",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}