{
 "ocl_version": "0.1.0",
 "name": "Pas du Serpaton from Gresse-en-Vercors",
 "slug": "pas-du-serpaton-from-gresse-en-vercors",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 26.616172919500514,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 296.0,
   "end_distance_m": 298.0,
   "start_elevation_m": 1213.0146909473235,
   "end_elevation_m": 1213.5470144057135,
   "min_gradient_pct": -15.261448135981937,
   "suppressed_max_gradient_pct": 35.4686704863866,
   "suppressed_location_m": [
    1262.0,
    1264.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.421625657458815,
   "diagnostic": true,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 295.0,
   "end_distance_m": 298.0,
   "start_elevation_m": 1212.8743656359898,
   "end_elevation_m": 1213.5470144057135,
   "min_gradient_pct": -11.583934455158365,
   "suppressed_max_gradient_pct": 34.49954240883623,
   "suppressed_location_m": [
    1261.0,
    1264.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 20.630307301221364,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 2714.0,
   "end_distance_m": 2719.0,
   "start_elevation_m": 1427.3285589630868,
   "end_elevation_m": 1428.360074328148,
   "min_gradient_pct": -11.312688713474017,
   "suppressed_max_gradient_pct": 31.681180995442446,
   "suppressed_location_m": [
    1259.0,
    1264.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 19.269056302528043,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 2714.0,
   "end_distance_m": 2724.0,
   "start_elevation_m": 1427.3285589630868,
   "end_elevation_m": 1429.2554645933396,
   "min_gradient_pct": -10.937666949796494,
   "suppressed_max_gradient_pct": 24.5151904398449,
   "suppressed_location_m": [
    1259.0,
    1269.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 17.996018688480717,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 2711.0,
   "end_distance_m": 2731.0,
   "start_elevation_m": 1426.8055119254088,
   "end_elevation_m": 1430.404715663105,
   "min_gradient_pct": -10.351532909706975,
   "suppressed_max_gradient_pct": 18.441415174863778,
   "suppressed_location_m": [
    1248.0,
    1268.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 17.604356729274514,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2710.0,
   "end_distance_m": 2735.0,
   "start_elevation_m": 1426.654832579668,
   "end_elevation_m": 1431.0559217619866,
   "min_gradient_pct": -9.92068858302082
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.70244302881656,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2683.0,
   "end_distance_m": 2733.0,
   "start_elevation_m": 1422.380604705381,
   "end_elevation_m": 1430.7318262197894,
   "min_gradient_pct": -7.627325897265109
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.998504886949831,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2635.0,
   "end_distance_m": 2735.0,
   "start_elevation_m": 1415.0574168750368,
   "end_elevation_m": 1431.0559217619866,
   "min_gradient_pct": -4.101744647416126
  }
 ],
 "shape": {
  "ascent_concentration": 0.325,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 625.0,
  "shape_class": "sustained"
 },
 "length_m": 4220.217990443069,
 "start_elevation_m": 1194.5122292402325,
 "end_elevation_m": 1586.4360220478688,
 "endpoint_gain_m": 391.92379280763635,
 "overall_gradient_pct": 9.286813944094138,
 "accumulated_ascent_m": 398.1139705933283,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 20.630307301221364,
   "start_distance_m": 2714.0,
   "end_distance_m": 2719.0,
   "midpoint_distance_m": 2716.5,
   "start_elevation_m": 1427.3285589630868,
   "end_elevation_m": 1428.360074328148,
   "start_xy": [
    903691.8319822747,
    6426095.019587466
   ],
   "end_xy": [
    903695.2799360328,
    6426098.64058386
   ]
  },
  "max_10m": {
   "gradient_pct": 19.269056302528043,
   "start_distance_m": 2714.0,
   "end_distance_m": 2724.0,
   "midpoint_distance_m": 2719.0,
   "start_elevation_m": 1427.3285589630868,
   "end_elevation_m": 1429.2554645933396,
   "start_xy": [
    903691.8319822747,
    6426095.019587466
   ],
   "end_xy": [
    903698.727889791,
    6426102.261580253
   ]
  },
  "max_20m": {
   "gradient_pct": 17.996018688480717,
   "start_distance_m": 2711.0,
   "end_distance_m": 2731.0,
   "midpoint_distance_m": 2721.0,
   "start_elevation_m": 1426.8055119254088,
   "end_elevation_m": 1430.404715663105,
   "start_xy": [
    903689.7632100197,
    6426092.84698963
   ],
   "end_xy": [
    903703.6909124065,
    6426107.176211929
   ]
  },
  "max_25m": {
   "gradient_pct": 17.604356729274514,
   "start_distance_m": 2710.0,
   "end_distance_m": 2735.0,
   "midpoint_distance_m": 2722.5,
   "start_elevation_m": 1426.654832579668,
   "end_elevation_m": 1431.0559217619866,
   "start_xy": [
    903689.073619268,
    6426092.1227903515
   ],
   "end_xy": [
    903706.9201483451,
    6426109.536727816
   ]
  },
  "max_50m": {
   "gradient_pct": 16.70244302881656,
   "start_distance_m": 2683.0,
   "end_distance_m": 2733.0,
   "midpoint_distance_m": 2708.0,
   "start_elevation_m": 1422.380604705381,
   "end_elevation_m": 1430.7318262197894,
   "start_xy": [
    903670.6847524804,
    6426072.401080088
   ],
   "end_xy": [
    903705.3055303758,
    6426108.356469872
   ]
  },
  "max_100m": {
   "gradient_pct": 15.998504886949831,
   "start_distance_m": 2635.0,
   "end_distance_m": 2735.0,
   "midpoint_distance_m": 2685.0,
   "start_elevation_m": 1415.0574168750368,
   "end_elevation_m": 1431.0559217619866,
   "start_xy": [
    903647.3261510344,
    6426030.664101602
   ],
   "end_xy": [
    903706.9201483451,
    6426109.536727816
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.312688713474017,
   "start_distance_m": 2446.0,
   "end_distance_m": 2451.0,
   "midpoint_distance_m": 2448.5,
   "start_elevation_m": 1409.9361528889601,
   "end_elevation_m": 1409.3705184532864,
   "start_xy": [
    903581.5759182881,
    6425859.4948217375
   ],
   "end_xy": [
    903583.0410604398,
    6425864.275340378
   ]
  },
  "min_10m": {
   "gradient_pct": -10.937666949796494,
   "start_distance_m": 2444.0,
   "end_distance_m": 2454.0,
   "midpoint_distance_m": 2449.0,
   "start_elevation_m": 1410.1446930081888,
   "end_elevation_m": 1409.0509263132092,
   "start_xy": [
    903580.9898614275,
    6425857.582614281
   ],
   "end_xy": [
    903583.9201457307,
    6425867.143651563
   ]
  },
  "min_20m": {
   "gradient_pct": -10.351532909706975,
   "start_distance_m": 2439.0,
   "end_distance_m": 2459.0,
   "midpoint_distance_m": 2449.0,
   "start_elevation_m": 1410.6242833620465,
   "end_elevation_m": 1408.5539767801051,
   "start_xy": [
    903579.5247192759,
    6425852.8020956395
   ],
   "end_xy": [
    903585.816297242,
    6425871.766140403
   ]
  },
  "min_25m": {
   "gradient_pct": -9.92068858302082,
   "start_distance_m": 2436.0,
   "end_distance_m": 2461.0,
   "midpoint_distance_m": 2448.5,
   "start_elevation_m": 1410.8706769700557,
   "end_elevation_m": 1408.3905048243005,
   "start_xy": [
    903578.6456339848,
    6425849.933784455
   ],
   "end_xy": [
    903586.6051955466,
    6425873.603975941
   ]
  },
  "min_50m": {
   "gradient_pct": -7.627325897265109,
   "start_distance_m": 2425.0,
   "end_distance_m": 2475.0,
   "midpoint_distance_m": 2450.0,
   "start_elevation_m": 1411.399784993761,
   "end_elevation_m": 1407.5861220451284,
   "start_xy": [
    903575.4223212512,
    6425839.416643445
   ],
   "end_xy": [
    903592.1274836791,
    6425886.468824708
   ]
  },
  "min_100m": {
   "gradient_pct": -4.101744647416126,
   "start_distance_m": 2392.0,
   "end_distance_m": 2492.0,
   "midpoint_distance_m": 2442.0,
   "start_elevation_m": 1411.6329016663744,
   "end_elevation_m": 1407.5311570189583,
   "start_xy": [
    903568.1023298852,
    6425807.246645291
   ],
   "end_xy": [
    903599.3793595821,
    6425901.837753234
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 26.616172919500514,
   "start_distance_m": 296.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 297.0,
   "start_elevation_m": 1213.0146909473235,
   "end_elevation_m": 1213.5470144057135,
   "start_xy": [
    903067.1440551991,
    6425495.708483713
   ],
   "end_xy": [
    903068.3776578117,
    6425494.13424593
   ]
  },
  "max_3m": {
   "gradient_pct": 22.421625657458815,
   "start_distance_m": 295.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 296.5,
   "start_elevation_m": 1212.8743656359898,
   "end_elevation_m": 1213.5470144057135,
   "start_xy": [
    903066.5102713642,
    6425496.480481894
   ],
   "end_xy": [
    903068.3776578117,
    6425494.13424593
   ]
  }
 },
 "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": 0.005,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.011,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 20.0,
     "start_m": 1248.0,
     "end_m": 1268.0,
     "raw_pct": 18.44,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 1259.0,
     "end_m": 1269.0,
     "raw_pct": 24.52,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.18,
   "obstruction_max_height_m": 21.68,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    0.0,
    20.0
   ],
   [
    1246.0,
    1271.0
   ]
  ],
  "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_E902-N6425_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E903-N6425_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E903-N6426_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E903-N6427_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E904-N6426_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E904-N6427_0m5.tif"
  ],
  "calculated_at": "2026-09-17T19:22:50+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps2-cols.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps2-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": [
   "E902-N6425",
   "E903-N6425",
   "E903-N6426",
   "E903-N6427",
   "E904-N6426",
   "E904-N6427"
  ],
  "elevation_blocks": [
   "21LHD7PN@2025-02-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0902_6426_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0903_6426_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0903_6427_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0903_6428_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0904_6427_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0904_6428_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD7PN"
  ],
  "ign_editions": [
   "2025-02-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0902_6426_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0903_6426_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0903_6427_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0903_6428_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0904_6427_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0904_6428_MNT_O_0M50_LAMB93_IGN69": "2025-02-20"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": 9,
  "structure_mask_ranges_m": [
   [
    0.0,
    15.0
   ]
  ],
  "carriageway": {
   "stations": 174,
   "stations_resolved": 174,
   "width_median_m": 4.75,
   "width_p10_m": 3.25,
   "width_min_m": 1.5,
   "width_max_m": 10.5,
   "bounded_share": 0.454,
   "unbounded_share": 0.546,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.75,
   "window_m": [
    2710.0,
    2735.0
   ],
   "width_at_max25_m": 3.38,
   "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": 174,
    "stations_resolved": 174,
    "width_median_m": 6.25,
    "width_p10_m": 1.08,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.776,
    "unbounded_share": 0.224,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.5,
    "window_m": [
     2710.0,
     2735.0
    ],
    "width_at_max25_m": 4.62,
    "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": "Gresse-en-Vercors",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}