{
 "ocl_version": "0.1.0",
 "name": "Col de Castillon from Sospel",
 "slug": "col-de-castillon-from-sospel-2",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 51.55467376818592,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 4537.0,
   "end_distance_m": 4539.0,
   "start_elevation_m": 643.2036039714566,
   "end_elevation_m": 644.2346974468203,
   "min_gradient_pct": -299.438586116392,
   "suppressed_max_gradient_pct": 366.7138309013694,
   "suppressed_location_m": [
    4289.0,
    4291.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 46.692485039341136,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 4537.0,
   "end_distance_m": 4540.0,
   "start_elevation_m": 643.2036039714566,
   "end_elevation_m": 644.6043785226368,
   "min_gradient_pct": -281.12288669791116,
   "suppressed_max_gradient_pct": 310.6076809604777,
   "suppressed_location_m": [
    4288.0,
    4291.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 46.08962439378729,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 4537.0,
   "end_distance_m": 4542.0,
   "start_elevation_m": 643.2036039714566,
   "end_elevation_m": 645.5080851911459,
   "min_gradient_pct": -168.6369830527599,
   "suppressed_max_gradient_pct": 215.19935045643933,
   "suppressed_location_m": [
    4288.0,
    4293.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 14.20611471723987,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 4600.0,
   "end_distance_m": 4610.0,
   "start_elevation_m": 662.5879877597625,
   "end_elevation_m": 664.0085992314865,
   "min_gradient_pct": -82.97344904238571,
   "suppressed_max_gradient_pct": 174.61793161427295,
   "suppressed_location_m": [
    4283.0,
    4293.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 9.790188081505846,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 2004.0,
   "end_distance_m": 2024.0,
   "start_elevation_m": 453.19244967126974,
   "end_elevation_m": 455.1504872875709,
   "min_gradient_pct": -40.275866236896434,
   "suppressed_max_gradient_pct": 104.22571032147061,
   "suppressed_location_m": [
    4284.0,
    4304.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 9.63746348747236,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 2003.0,
   "end_distance_m": 2028.0,
   "start_elevation_m": 453.0893318566311,
   "end_elevation_m": 455.49869772849917,
   "min_gradient_pct": -31.921771243663443,
   "suppressed_max_gradient_pct": 92.14570354803118,
   "suppressed_location_m": [
    4283.0,
    4308.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 9.411516698871765,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1998.0,
   "end_distance_m": 2048.0,
   "start_elevation_m": 452.6595230379156,
   "end_elevation_m": 457.3652813873515,
   "min_gradient_pct": -14.249495068018746,
   "suppressed_max_gradient_pct": 68.29764297970087,
   "suppressed_location_m": [
    4284.0,
    4334.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 9.306126819179099,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1997.0,
   "end_distance_m": 2097.0,
   "start_elevation_m": 452.54541383043306,
   "end_elevation_m": 461.85154064961216,
   "min_gradient_pct": -4.857700799460474,
   "suppressed_max_gradient_pct": 45.42550223744309,
   "suppressed_location_m": [
    4270.0,
    4370.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.461,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 74.0,
  "shape_class": "stepped"
 },
 "length_m": 4652.970052210829,
 "start_elevation_m": 358.7527234058082,
 "end_elevation_m": 684.9744516951105,
 "endpoint_gain_m": 326.2217282893023,
 "overall_gradient_pct": 7.011042938784877,
 "accumulated_ascent_m": 346.8034392098146,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 46.08962439378729,
   "start_distance_m": 4537.0,
   "end_distance_m": 4542.0,
   "midpoint_distance_m": 4539.5,
   "start_elevation_m": 643.2036039714566,
   "end_elevation_m": 645.5080851911459,
   "start_xy": [
    1058408.3234678584,
    6314782.712714814
   ],
   "end_xy": [
    1058412.6310684085,
    6314780.174097572
   ]
  },
  "max_10m": {
   "gradient_pct": 14.20611471723987,
   "start_distance_m": 4600.0,
   "end_distance_m": 4610.0,
   "midpoint_distance_m": 4605.0,
   "start_elevation_m": 662.5879877597625,
   "end_elevation_m": 664.0085992314865,
   "start_xy": [
    1058462.5992347905,
    6314750.726137568
   ],
   "end_xy": [
    1058471.214435891,
    6314745.648903085
   ]
  },
  "max_20m": {
   "gradient_pct": 9.790188081505846,
   "start_distance_m": 2004.0,
   "end_distance_m": 2024.0,
   "midpoint_distance_m": 2014.0,
   "start_elevation_m": 453.19244967126974,
   "end_elevation_m": 455.1504872875709,
   "start_xy": [
    1057447.2297824405,
    6316636.15061936
   ],
   "end_xy": [
    1057457.1967312957,
    6316618.811071196
   ]
  },
  "max_25m": {
   "gradient_pct": 9.63746348747236,
   "start_distance_m": 2003.0,
   "end_distance_m": 2028.0,
   "midpoint_distance_m": 2015.5,
   "start_elevation_m": 453.0893318566311,
   "end_elevation_m": 455.49869772849917,
   "start_xy": [
    1057446.7314349976,
    6316637.017596767
   ],
   "end_xy": [
    1057459.157712899,
    6316615.327911798
   ]
  },
  "max_50m": {
   "gradient_pct": 9.411516698871765,
   "start_distance_m": 1998.0,
   "end_distance_m": 2048.0,
   "midpoint_distance_m": 2023.0,
   "start_elevation_m": 452.6595230379156,
   "end_elevation_m": 457.3652813873515,
   "start_xy": [
    1057444.239697784,
    6316641.352483809
   ],
   "end_xy": [
    1057466.0106369618,
    6316596.553579719
   ]
  },
  "max_100m": {
   "gradient_pct": 9.306126819179099,
   "start_distance_m": 1997.0,
   "end_distance_m": 2097.0,
   "midpoint_distance_m": 2047.0,
   "start_elevation_m": 452.54541383043306,
   "end_elevation_m": 461.85154064961216,
   "start_xy": [
    1057443.7413503411,
    6316642.219461217
   ],
   "end_xy": [
    1057463.2888945162,
    6316548.420074497
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -168.6369830527599,
   "start_distance_m": 1481.0,
   "end_distance_m": 1486.0,
   "midpoint_distance_m": 1483.5,
   "start_elevation_m": 434.7062627180817,
   "end_elevation_m": 426.2744135654437,
   "start_xy": [
    1057319.3886883543,
    6317123.829075569
   ],
   "end_xy": [
    1057321.8911452973,
    6317119.500367997
   ]
  },
  "min_10m": {
   "gradient_pct": -82.97344904238571,
   "start_distance_m": 1476.0,
   "end_distance_m": 1486.0,
   "midpoint_distance_m": 1481.0,
   "start_elevation_m": 434.57175846968227,
   "end_elevation_m": 426.2744135654437,
   "start_xy": [
    1057315.640963975,
    6317127.003946947
   ],
   "end_xy": [
    1057321.8911452973,
    6317119.500367997
   ]
  },
  "min_20m": {
   "gradient_pct": -40.275866236896434,
   "start_distance_m": 1466.0,
   "end_distance_m": 1486.0,
   "midpoint_distance_m": 1476.0,
   "start_elevation_m": 434.329586812823,
   "end_elevation_m": 426.2744135654437,
   "start_xy": [
    1057307.111841673,
    6317132.161480111
   ],
   "end_xy": [
    1057321.8911452973,
    6317119.500367997
   ]
  },
  "min_25m": {
   "gradient_pct": -31.921771243663443,
   "start_distance_m": 1461.0,
   "end_distance_m": 1486.0,
   "midpoint_distance_m": 1473.5,
   "start_elevation_m": 434.25485637635956,
   "end_elevation_m": 426.2744135654437,
   "start_xy": [
    1057302.562597441,
    6317134.236179346
   ],
   "end_xy": [
    1057321.8911452973,
    6317119.500367997
   ]
  },
  "min_50m": {
   "gradient_pct": -14.249495068018746,
   "start_distance_m": 1436.0,
   "end_distance_m": 1486.0,
   "midpoint_distance_m": 1461.0,
   "start_elevation_m": 433.39916109945307,
   "end_elevation_m": 426.2744135654437,
   "start_xy": [
    1057279.8163762803,
    6317144.609675522
   ],
   "end_xy": [
    1057321.8911452973,
    6317119.500367997
   ]
  },
  "min_100m": {
   "gradient_pct": -4.857700799460474,
   "start_distance_m": 1386.0,
   "end_distance_m": 1486.0,
   "midpoint_distance_m": 1436.0,
   "start_elevation_m": 431.13211436490417,
   "end_elevation_m": 426.2744135654437,
   "start_xy": [
    1057251.663895663,
    6317183.288737507
   ],
   "end_xy": [
    1057321.8911452973,
    6317119.500367997
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 51.55467376818592,
   "start_distance_m": 4537.0,
   "end_distance_m": 4539.0,
   "midpoint_distance_m": 4538.0,
   "start_elevation_m": 643.2036039714566,
   "end_elevation_m": 644.2346974468203,
   "start_xy": [
    1058408.3234678584,
    6314782.712714814
   ],
   "end_xy": [
    1058410.0465080785,
    6314781.697267917
   ]
  },
  "max_3m": {
   "gradient_pct": 46.692485039341136,
   "start_distance_m": 4537.0,
   "end_distance_m": 4540.0,
   "midpoint_distance_m": 4538.5,
   "start_elevation_m": 643.2036039714566,
   "end_elevation_m": 644.6043785226368,
   "start_xy": [
    1058408.3234678584,
    6314782.712714814
   ],
   "end_xy": [
    1058410.9080281884,
    6314781.189544469
   ]
  }
 },
 "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": 0.034,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.055,
   "windows_resited": [
    10.0,
    20.0,
    25.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 4,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 4479.0,
     "end_m": 4504.0,
     "raw_pct": 22.53,
     "reason": "mask-edge"
    },
    {
     "window_m": 20.0,
     "start_m": 4299.0,
     "end_m": 4319.0,
     "raw_pct": 40.58,
     "reason": "mask-edge"
    },
    {
     "window_m": 20.0,
     "start_m": 4327.0,
     "end_m": 4347.0,
     "raw_pct": 23.93,
     "reason": "staircase+mask-edge"
    },
    {
     "window_m": 10.0,
     "start_m": 4327.0,
     "end_m": 4337.0,
     "raw_pct": 32.07,
     "reason": "mask-edge"
    },
    {
     "window_m": 10.0,
     "start_m": 4460.0,
     "end_m": 4470.0,
     "raw_pct": 22.55,
     "reason": "mask-edge"
    },
    {
     "window_m": 10.0,
     "start_m": 4404.0,
     "end_m": 4414.0,
     "raw_pct": 21.91,
     "reason": "short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.089,
   "obstruction_max_height_m": 13.67,
   "flagged_windows_m": [
    2,
    3,
    5,
    10
   ]
  },
  "excluded_ranges_m": [
   [
    1478.0,
    1494.0
   ],
   [
    4282.0,
    4294.0
   ],
   [
    4297.0,
    4357.0
   ],
   [
    4361.0,
    4366.0
   ],
   [
    4402.0,
    4416.0
   ],
   [
    4450.0,
    4472.0
   ],
   [
    4477.0,
    4506.0
   ],
   [
    4508.0,
    4523.0
   ],
   [
    4526.0,
    4536.0
   ],
   [
    4545.0,
    4551.0
   ],
   [
    4554.0,
    4577.0
   ],
   [
    4617.0,
    4624.0
   ],
   [
    4626.0,
    4652.0
   ]
  ],
  "review": [
   "max5_over_45",
   "short_window_divergence"
  ],
  "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_E1057-N6314_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1057-N6315_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1057-N6316_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1057-N6317_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1057-N6318_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1058-N6314_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1058-N6315_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:18:08+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": [
   "E1057-N6314",
   "E1057-N6315",
   "E1057-N6316",
   "E1057-N6317",
   "E1057-N6318",
   "E1058-N6314",
   "E1058-N6315"
  ],
  "elevation_blocks": [
   "21LHD8SP@2025-06-20"
  ],
  "ign_dalles": [
   "LHD_FXX_1057_6315_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_1057_6316_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_1057_6317_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_1057_6318_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_1057_6319_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_1058_6315_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_1058_6316_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8SP"
  ],
  "ign_editions": [
   "2025-06-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1057_6315_MNT_O_0M50_LAMB93_IGN69": "2025-06-20",
   "LHD_FXX_1057_6316_MNT_O_0M50_LAMB93_IGN69": "2025-06-20",
   "LHD_FXX_1057_6317_MNT_O_0M50_LAMB93_IGN69": "2025-06-20",
   "LHD_FXX_1057_6318_MNT_O_0M50_LAMB93_IGN69": "2025-06-20",
   "LHD_FXX_1057_6319_MNT_O_0M50_LAMB93_IGN69": "2025-06-20",
   "LHD_FXX_1058_6315_MNT_O_0M50_LAMB93_IGN69": "2025-06-20",
   "LHD_FXX_1058_6316_MNT_O_0M50_LAMB93_IGN69": "2025-06-20"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 193,
   "stations_resolved": 193,
   "width_median_m": 8.0,
   "width_p10_m": 5.05,
   "width_min_m": 1.0,
   "width_max_m": 11.5,
   "bounded_share": 0.238,
   "unbounded_share": 0.762,
   "confidence_median": 0.0,
   "width_median_bounded_m": 7.75,
   "window_m": [
    2003.0,
    2028.0
   ],
   "width_at_max25_m": 8.75,
   "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": 193,
    "stations_resolved": 193,
    "width_median_m": 8.75,
    "width_p10_m": 3.55,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.549,
    "unbounded_share": 0.451,
    "confidence_median": 1.0,
    "width_median_bounded_m": 7.38,
    "window_m": [
     2003.0,
     2028.0
    ],
    "width_at_max25_m": 11.75,
    "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": "Sospel",
  "county": "Alpes-Maritimes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}