{
 "ocl_version": "0.1.0",
 "name": "Col de Porte from Saint-Pierre-de-Chartreuse",
 "slug": "col-de-porte-from-saint-pierre-de-chartreuse",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 28.585060969487586,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1192.0,
   "end_distance_m": 1194.0,
   "start_elevation_m": 845.765822965948,
   "end_elevation_m": 846.3375241853378,
   "min_gradient_pct": -112.55474019302483,
   "suppressed_max_gradient_pct": 151.29052183807516,
   "suppressed_location_m": [
    714.0,
    716.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.094811161078724,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1192.0,
   "end_distance_m": 1195.0,
   "start_elevation_m": 845.765822965948,
   "end_elevation_m": 846.5486673007804,
   "min_gradient_pct": -112.15266440984048,
   "suppressed_max_gradient_pct": 150.89728623494616,
   "suppressed_location_m": [
    714.0,
    717.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 19.794108266419244,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 1191.0,
   "end_distance_m": 1196.0,
   "start_elevation_m": 845.6341572430817,
   "end_elevation_m": 846.6238626564027,
   "min_gradient_pct": -111.28007767636518,
   "suppressed_max_gradient_pct": 126.67722398016849,
   "suppressed_location_m": [
    713.0,
    718.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 14.238528532525834,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 5996.0,
   "end_distance_m": 6006.0,
   "start_elevation_m": 1165.2257086613372,
   "end_elevation_m": 1166.6495615145898,
   "min_gradient_pct": -75.49964235244374,
   "suppressed_max_gradient_pct": 80.14472401997523,
   "suppressed_location_m": [
    711.0,
    721.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 12.988117103843706,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 5993.0,
   "end_distance_m": 6013.0,
   "start_elevation_m": 1164.8616758380965,
   "end_elevation_m": 1167.4592992588653,
   "min_gradient_pct": -37.385321319050604,
   "suppressed_max_gradient_pct": 43.44479323149358,
   "suppressed_location_m": [
    711.0,
    731.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 12.266916744884838,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 5992.0,
   "end_distance_m": 6017.0,
   "start_elevation_m": 1164.745970835255,
   "end_elevation_m": 1167.8127000214763,
   "min_gradient_pct": -29.680391295682057,
   "suppressed_max_gradient_pct": 36.07592477327444,
   "suppressed_location_m": [
    711.0,
    736.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 11.280603091070134,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 6817.0,
   "end_distance_m": 6867.0,
   "start_elevation_m": 1221.6256797522112,
   "end_elevation_m": 1227.2659812977463,
   "min_gradient_pct": -14.178240905917164,
   "suppressed_max_gradient_pct": 21.611383197629948,
   "suppressed_location_m": [
    711.0,
    761.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 10.244430357523697,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 6804.0,
   "end_distance_m": 6904.0,
   "start_elevation_m": 1220.3517414411074,
   "end_elevation_m": 1230.596171798631,
   "min_gradient_pct": -6.192481206026969,
   "suppressed_max_gradient_pct": 14.367771738921874,
   "suppressed_location_m": [
    711.0,
    811.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.321,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 61.0,
  "shape_class": "sustained"
 },
 "length_m": 8228.333625343477,
 "start_elevation_m": 794.8057195507815,
 "end_elevation_m": 1323.8401767577889,
 "endpoint_gain_m": 529.0344572070073,
 "overall_gradient_pct": 6.429424003635046,
 "accumulated_ascent_m": 544.3111800163344,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 19.794108266419244,
   "start_distance_m": 1191.0,
   "end_distance_m": 1196.0,
   "midpoint_distance_m": 1193.5,
   "start_elevation_m": 845.6341572430817,
   "end_elevation_m": 846.6238626564027,
   "start_xy": [
    919602.4813915329,
    6473905.975390406
   ],
   "end_xy": [
    919599.7869260657,
    6473901.763519581
   ]
  },
  "max_10m": {
   "gradient_pct": 14.238528532525834,
   "start_distance_m": 5996.0,
   "end_distance_m": 6006.0,
   "midpoint_distance_m": 6001.0,
   "start_elevation_m": 1165.2257086613372,
   "end_elevation_m": 1166.6495615145898,
   "start_xy": [
    917188.2347160984,
    6471265.269036997
   ],
   "end_xy": [
    917181.6865506984,
    6471257.711890047
   ]
  },
  "max_20m": {
   "gradient_pct": 12.988117103843706,
   "start_distance_m": 5993.0,
   "end_distance_m": 6013.0,
   "midpoint_distance_m": 6003.0,
   "start_elevation_m": 1164.8616758380965,
   "end_elevation_m": 1167.4592992588653,
   "start_xy": [
    917190.1767022891,
    6471267.555669813
   ],
   "end_xy": [
    917177.0438434879,
    6471252.4730667295
   ]
  },
  "max_25m": {
   "gradient_pct": 12.266916744884838,
   "start_distance_m": 5992.0,
   "end_distance_m": 6017.0,
   "midpoint_distance_m": 6004.5,
   "start_elevation_m": 1164.745970835255,
   "end_elevation_m": 1167.8127000214763,
   "start_xy": [
    917190.8240310194,
    6471268.317880752
   ],
   "end_xy": [
    917174.390867939,
    6471249.479453405
   ]
  },
  "max_50m": {
   "gradient_pct": 11.280603091070134,
   "start_distance_m": 6817.0,
   "end_distance_m": 6867.0,
   "midpoint_distance_m": 6842.0,
   "start_elevation_m": 1221.6256797522112,
   "end_elevation_m": 1227.2659812977463,
   "start_xy": [
    917123.9861036639,
    6470767.75528858
   ],
   "end_xy": [
    917128.1245378883,
    6470721.225522125
   ]
  },
  "max_100m": {
   "gradient_pct": 10.244430357523697,
   "start_distance_m": 6804.0,
   "end_distance_m": 6904.0,
   "midpoint_distance_m": 6854.0,
   "start_elevation_m": 1220.3517414411074,
   "end_elevation_m": 1230.596171798631,
   "start_xy": [
    917114.1473428202,
    6470776.10287465
   ],
   "end_xy": [
    917115.1962472413,
    6470686.557679663
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -111.28007767636518,
   "start_distance_m": 700.0,
   "end_distance_m": 705.0,
   "midpoint_distance_m": 702.5,
   "start_elevation_m": 810.1623424698604,
   "end_elevation_m": 804.5983385860421,
   "start_xy": [
    919809.958234831,
    6474344.203878665
   ],
   "end_xy": [
    919806.8318360182,
    6474340.301875275
   ]
  },
  "min_10m": {
   "gradient_pct": -75.49964235244374,
   "start_distance_m": 699.0,
   "end_distance_m": 709.0,
   "midpoint_distance_m": 704.0,
   "start_elevation_m": 810.5748845352142,
   "end_elevation_m": 803.0249202999698,
   "start_xy": [
    919810.5393068476,
    6474345.017009416
   ],
   "end_xy": [
    919804.3307169682,
    6474337.1802725615
   ]
  },
  "min_20m": {
   "gradient_pct": -37.385321319050604,
   "start_distance_m": 691.0,
   "end_distance_m": 711.0,
   "midpoint_distance_m": 701.0,
   "start_elevation_m": 810.4092189639604,
   "end_elevation_m": 802.9321547001502,
   "start_xy": [
    919815.050689215,
    6474351.623629515
   ],
   "end_xy": [
    919803.0801574431,
    6474335.619471205
   ]
  },
  "min_25m": {
   "gradient_pct": -29.680391295682057,
   "start_distance_m": 686.0,
   "end_distance_m": 711.0,
   "midpoint_distance_m": 698.5,
   "start_elevation_m": 810.3522525240708,
   "end_elevation_m": 802.9321547001502,
   "start_xy": [
    919817.8703031946,
    6474355.752767077
   ],
   "end_xy": [
    919803.0801574431,
    6474335.619471205
   ]
  },
  "min_50m": {
   "gradient_pct": -14.178240905917164,
   "start_distance_m": 661.0,
   "end_distance_m": 711.0,
   "midpoint_distance_m": 686.0,
   "start_elevation_m": 810.0212751531088,
   "end_elevation_m": 802.9321547001502,
   "start_xy": [
    919831.0106437445,
    6474376.970372639
   ],
   "end_xy": [
    919803.0801574431,
    6474335.619471205
   ]
  },
  "min_100m": {
   "gradient_pct": -6.192481206026969,
   "start_distance_m": 611.0,
   "end_distance_m": 711.0,
   "midpoint_distance_m": 661.0,
   "start_elevation_m": 809.1246359061772,
   "end_elevation_m": 802.9321547001502,
   "start_xy": [
    919846.1501246142,
    6474424.365125545
   ],
   "end_xy": [
    919803.0801574431,
    6474335.619471205
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 28.585060969487586,
   "start_distance_m": 1192.0,
   "end_distance_m": 1194.0,
   "midpoint_distance_m": 1193.0,
   "start_elevation_m": 845.765822965948,
   "end_elevation_m": 846.3375241853378,
   "start_xy": [
    919601.9424984396,
    6473905.133016242
   ],
   "end_xy": [
    919600.8647122526,
    6473903.448267912
   ]
  },
  "max_3m": {
   "gradient_pct": 26.094811161078724,
   "start_distance_m": 1192.0,
   "end_distance_m": 1195.0,
   "midpoint_distance_m": 1193.5,
   "start_elevation_m": 845.765822965948,
   "end_elevation_m": 846.5486673007804,
   "start_xy": [
    919601.9424984396,
    6473905.133016242
   ],
   "end_xy": [
    919600.3258191592,
    6473902.605893746
   ]
  }
 },
 "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": 0.008,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.012,
   "windows_resited": [
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 5588.0,
     "end_m": 5613.0,
     "raw_pct": 16.82,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 5588.0,
     "end_m": 5608.0,
     "raw_pct": 18.15,
     "reason": "hump"
    },
    {
     "window_m": 10.0,
     "start_m": 5592.0,
     "end_m": 5602.0,
     "raw_pct": 21.1,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.114,
   "obstruction_max_height_m": 30.1,
   "flagged_windows_m": [
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    693.0,
    725.0
   ],
   [
    5295.0,
    5305.0
   ],
   [
    5322.0,
    5345.0
   ],
   [
    5586.0,
    5615.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "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_E916-N6469_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E916-N6470_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E916-N6471_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E917-N6469_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E917-N6470_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E917-N6471_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E917-N6472_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E918-N6471_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E918-N6472_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E918-N6473_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E919-N6472_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E919-N6473_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E919-N6474_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E919-N6475_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:08:17+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps2",
  "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": [
   "E916-N6469",
   "E916-N6470",
   "E916-N6471",
   "E917-N6469",
   "E917-N6470",
   "E917-N6471",
   "E917-N6472",
   "E918-N6471",
   "E918-N6472",
   "E918-N6473",
   "E919-N6472",
   "E919-N6473",
   "E919-N6474",
   "E919-N6475"
  ],
  "elevation_blocks": [
   "21LHD6PM@2025-03-25"
  ],
  "ign_dalles": [
   "LHD_FXX_0916_6470_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0916_6471_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0916_6472_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0917_6470_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0917_6471_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0917_6472_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0917_6473_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0918_6472_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0918_6473_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0918_6474_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0919_6473_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0919_6474_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0919_6475_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0919_6476_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6PM"
  ],
  "ign_editions": [
   "2025-03-25"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0916_6470_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0916_6471_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0916_6472_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0917_6470_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0917_6471_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0917_6472_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0917_6473_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0918_6472_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0918_6473_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0918_6474_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0919_6473_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0919_6474_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0919_6475_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0919_6476_MNT_O_0M50_LAMB93_IGN69": "2025-03-25"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": 23,
  "structure_mask_ranges_m": [
   [
    699.7,
    721.0
   ]
  ],
  "mask_basin_extension_m": 1.0,
  "carriageway": {
   "stations": 336,
   "stations_resolved": 336,
   "width_median_m": 6.75,
   "width_p10_m": 4.38,
   "width_min_m": 1.25,
   "width_max_m": 12.0,
   "bounded_share": 0.238,
   "unbounded_share": 0.762,
   "confidence_median": 0.0,
   "width_median_bounded_m": 7.0,
   "window_m": [
    5992.0,
    6017.0
   ],
   "width_at_max25_m": 3.75,
   "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": 336,
    "stations_resolved": 336,
    "width_median_m": 7.75,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.702,
    "unbounded_share": 0.298,
    "confidence_median": 1.0,
    "width_median_bounded_m": 6.75,
    "window_m": [
     5992.0,
     6017.0
    ],
    "width_at_max25_m": 4.25,
    "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": "Saint-Pierre-de-Chartreuse",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}