{
 "ocl_version": "0.1.0",
 "name": "Col du Granier from Chapareillan",
 "slug": "col-du-granier-from-chapareillan",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 17.268074095079555,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2716.0,
   "end_distance_m": 2718.0,
   "start_elevation_m": 730.0482269896968,
   "end_elevation_m": 730.3935884715984,
   "min_gradient_pct": -178.1263439384361,
   "suppressed_max_gradient_pct": 204.81006332848892,
   "suppressed_location_m": [
    3736.0,
    3738.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 16.671827473013916,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2715.0,
   "end_distance_m": 2718.0,
   "start_elevation_m": 729.893433647408,
   "end_elevation_m": 730.3935884715984,
   "min_gradient_pct": -126.16535810346932,
   "suppressed_max_gradient_pct": 140.98852696016593,
   "suppressed_location_m": [
    3735.0,
    3738.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 14.895906441895477,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 673.0,
   "end_distance_m": 678.0,
   "start_elevation_m": 580.0240251720443,
   "end_elevation_m": 580.768820494139,
   "min_gradient_pct": -72.35460915026124,
   "suppressed_max_gradient_pct": 89.07328400373899,
   "suppressed_location_m": [
    3734.0,
    3739.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 14.297303911848758,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 5909.0,
   "end_distance_m": 5919.0,
   "start_elevation_m": 1057.4350665502234,
   "end_elevation_m": 1058.8647969414083,
   "min_gradient_pct": -31.483501182580085,
   "suppressed_max_gradient_pct": 48.862693405812934,
   "suppressed_location_m": [
    3734.0,
    3744.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 14.08380659640784,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 5910.0,
   "end_distance_m": 5930.0,
   "start_elevation_m": 1057.5648074028275,
   "end_elevation_m": 1060.381568722109,
   "min_gradient_pct": -10.41133060630159,
   "suppressed_max_gradient_pct": 29.179350414383407,
   "suppressed_location_m": [
    3734.0,
    3754.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 13.98650741397796,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 5909.0,
   "end_distance_m": 5934.0,
   "start_elevation_m": 1057.4350665502234,
   "end_elevation_m": 1060.9316934037179,
   "min_gradient_pct": -6.195107409436787,
   "suppressed_max_gradient_pct": 25.32060042073499,
   "suppressed_location_m": [
    3734.0,
    3759.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 13.884891019351471,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 5900.0,
   "end_distance_m": 5950.0,
   "start_elevation_m": 1056.2177914796846,
   "end_elevation_m": 1063.1602369893603,
   "min_gradient_pct": -0.4641763469505804,
   "suppressed_max_gradient_pct": 17.52907377624274,
   "suppressed_location_m": [
    3735.0,
    3785.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.637160749566647,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 5853.0,
   "end_distance_m": 5953.0,
   "start_elevation_m": 1049.902987903753,
   "end_elevation_m": 1063.5401486533196,
   "min_gradient_pct": -0.08903460512203765,
   "suppressed_max_gradient_pct": 14.317619221995756,
   "suppressed_location_m": [
    3734.0,
    3834.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.302,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 496.0,
  "shape_class": "sustained"
 },
 "length_m": 6710.547798764398,
 "start_elevation_m": 512.085788664097,
 "end_elevation_m": 1132.2381544531245,
 "endpoint_gain_m": 620.1523657890275,
 "overall_gradient_pct": 9.241456649831406,
 "accumulated_ascent_m": 624.9781063648277,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 14.895906441895477,
   "start_distance_m": 673.0,
   "end_distance_m": 678.0,
   "midpoint_distance_m": 675.5,
   "start_elevation_m": 580.0240251720443,
   "end_elevation_m": 580.768820494139,
   "start_xy": [
    931063.5552748359,
    6490798.406463463
   ],
   "end_xy": [
    931058.5614274918,
    6490798.158494304
   ]
  },
  "max_10m": {
   "gradient_pct": 14.297303911848758,
   "start_distance_m": 5909.0,
   "end_distance_m": 5919.0,
   "midpoint_distance_m": 5914.0,
   "start_elevation_m": 1057.4350665502234,
   "end_elevation_m": 1058.8647969414083,
   "start_xy": [
    928013.2962462719,
    6491094.833971737
   ],
   "end_xy": [
    928005.5912104645,
    6491101.208328426
   ]
  },
  "max_20m": {
   "gradient_pct": 14.08380659640784,
   "start_distance_m": 5910.0,
   "end_distance_m": 5930.0,
   "midpoint_distance_m": 5920.0,
   "start_elevation_m": 1057.5648074028275,
   "end_elevation_m": 1060.381568722109,
   "start_xy": [
    928012.5257426912,
    6491095.471407405
   ],
   "end_xy": [
    927996.9103726847,
    6491107.922583673
   ]
  },
  "max_25m": {
   "gradient_pct": 13.98650741397796,
   "start_distance_m": 5909.0,
   "end_distance_m": 5934.0,
   "midpoint_distance_m": 5921.5,
   "start_elevation_m": 1057.4350665502234,
   "end_elevation_m": 1060.9316934037179,
   "start_xy": [
    928013.2962462719,
    6491094.833971737
   ],
   "end_xy": [
    927993.4327345636,
    6491109.898952337
   ]
  },
  "max_50m": {
   "gradient_pct": 13.884891019351471,
   "start_distance_m": 5900.0,
   "end_distance_m": 5950.0,
   "midpoint_distance_m": 5925.0,
   "start_elevation_m": 1056.2177914796846,
   "end_elevation_m": 1063.1602369893603,
   "start_xy": [
    928020.4750365831,
    6491089.4457720695
   ],
   "end_xy": [
    927977.9531607387,
    6491110.520299817
   ]
  },
  "max_100m": {
   "gradient_pct": 13.637160749566647,
   "start_distance_m": 5853.0,
   "end_distance_m": 5953.0,
   "midpoint_distance_m": 5903.0,
   "start_elevation_m": 1049.902987903753,
   "end_elevation_m": 1063.5401486533196,
   "start_xy": [
    928057.4777248211,
    6491061.290355027
   ],
   "end_xy": [
    927975.6477350518,
    6491108.671866671
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -72.35460915026124,
   "start_distance_m": 3729.0,
   "end_distance_m": 3734.0,
   "midpoint_distance_m": 3731.5,
   "start_elevation_m": 845.0751949127252,
   "end_elevation_m": 841.4574644552122,
   "start_xy": [
    929478.2193993363,
    6490764.849771176
   ],
   "end_xy": [
    929474.1500494373,
    6490767.754234602
   ]
  },
  "min_10m": {
   "gradient_pct": -31.483501182580085,
   "start_distance_m": 3724.0,
   "end_distance_m": 3734.0,
   "midpoint_distance_m": 3729.0,
   "start_elevation_m": 844.6058145734702,
   "end_elevation_m": 841.4574644552122,
   "start_xy": [
    929482.3528442044,
    6490762.03647533
   ],
   "end_xy": [
    929474.1500494373,
    6490767.754234602
   ]
  },
  "min_20m": {
   "gradient_pct": -10.41133060630159,
   "start_distance_m": 3714.0,
   "end_distance_m": 3734.0,
   "midpoint_distance_m": 3724.0,
   "start_elevation_m": 843.5397305764725,
   "end_elevation_m": 841.4574644552122,
   "start_xy": [
    929490.6197339407,
    6490756.409883636
   ],
   "end_xy": [
    929474.1500494373,
    6490767.754234602
   ]
  },
  "min_25m": {
   "gradient_pct": -6.195107409436787,
   "start_distance_m": 3709.0,
   "end_distance_m": 3734.0,
   "midpoint_distance_m": 3721.5,
   "start_elevation_m": 843.0062413075714,
   "end_elevation_m": 841.4574644552122,
   "start_xy": [
    929494.7531788087,
    6490753.596587789
   ],
   "end_xy": [
    929474.1500494373,
    6490767.754234602
   ]
  },
  "min_50m": {
   "gradient_pct": -0.4641763469505804,
   "start_distance_m": 4428.0,
   "end_distance_m": 4478.0,
   "midpoint_distance_m": 4453.0,
   "start_elevation_m": 913.9470498679573,
   "end_elevation_m": 913.714961694482,
   "start_xy": [
    929119.3072907121,
    6490750.11409126
   ],
   "end_xy": [
    929086.6545946912,
    6490714.748931159
   ]
  },
  "min_100m": {
   "gradient_pct": -0.08903460512203765,
   "start_distance_m": 4423.0,
   "end_distance_m": 4523.0,
   "midpoint_distance_m": 4473.0,
   "start_elevation_m": 913.8900153660777,
   "end_elevation_m": 913.8009807609557,
   "start_xy": [
    929120.794966362,
    6490754.887645613
   ],
   "end_xy": [
    929044.5174552996,
    6490722.44864659
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 17.268074095079555,
   "start_distance_m": 2716.0,
   "end_distance_m": 2718.0,
   "midpoint_distance_m": 2717.0,
   "start_elevation_m": 730.0482269896968,
   "end_elevation_m": 730.3935884715984,
   "start_xy": [
    930105.1378354693,
    6490765.553578631
   ],
   "end_xy": [
    930103.3644415651,
    6490764.628876484
   ]
  },
  "max_3m": {
   "gradient_pct": 16.671827473013916,
   "start_distance_m": 2715.0,
   "end_distance_m": 2718.0,
   "midpoint_distance_m": 2716.5,
   "start_elevation_m": 729.893433647408,
   "end_elevation_m": 730.3935884715984,
   "start_xy": [
    930106.0245324215,
    6490766.0159297045
   ],
   "end_xy": [
    930103.3644415651,
    6490764.628876484
   ]
  }
 },
 "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": 0.003,
   "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": 0.19,
   "obstruction_max_height_m": 24.33,
   "flagged_windows_m": [
    2,
    3,
    5
   ]
  },
  "excluded_ranges_m": [
   [
    3725.0,
    3744.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "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_E927-N6490_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E927-N6491_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E928-N6490_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E928-N6491_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E929-N6490_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E929-N6491_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E930-N6490_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E930-N6491_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E931-N6490_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E931-N6491_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:45:37+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": [
   "E927-N6490",
   "E927-N6491",
   "E928-N6490",
   "E928-N6491",
   "E929-N6490",
   "E929-N6491",
   "E930-N6490",
   "E930-N6491",
   "E931-N6490",
   "E931-N6491"
  ],
  "elevation_blocks": [
   "21LHD6PL@2025-03-07"
  ],
  "ign_dalles": [
   "LHD_FXX_0927_6491_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0927_6492_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0928_6491_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0928_6492_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0929_6491_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0929_6492_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0930_6491_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0930_6492_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0931_6491_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0931_6492_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6PL"
  ],
  "ign_editions": [
   "2025-03-07"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0927_6491_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0927_6492_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0928_6491_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0928_6492_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0929_6491_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0929_6492_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0930_6491_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0930_6492_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0931_6491_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0931_6492_MNT_O_0M50_LAMB93_IGN69": "2025-03-07"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": 6,
  "structure_mask_ranges_m": [
   [
    3730.3,
    3739.7
   ]
  ],
  "carriageway": {
   "stations": 275,
   "stations_resolved": 275,
   "width_median_m": 7.0,
   "width_p10_m": 5.75,
   "width_min_m": 3.0,
   "width_max_m": 12.0,
   "bounded_share": 0.335,
   "unbounded_share": 0.665,
   "confidence_median": 0.0,
   "width_median_bounded_m": 7.0,
   "window_m": [
    5909.0,
    5934.0
   ],
   "width_at_max25_m": 7.25,
   "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": 275,
    "stations_resolved": 275,
    "width_median_m": 5.25,
    "width_p10_m": 0.5,
    "width_min_m": 0.0,
    "width_max_m": 12.0,
    "bounded_share": 0.905,
    "unbounded_share": 0.095,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.75,
    "window_m": [
     5909.0,
     5934.0
    ],
    "width_at_max25_m": 0.75,
    "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": "Chapareillan",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}