{
 "ocl_version": "0.1.0",
 "name": "Chemin de Viallier",
 "slug": "chemin-de-viallier",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 42.8952178980353,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 343.0,
   "end_distance_m": 345.0,
   "start_elevation_m": 270.04259776065135,
   "end_elevation_m": 270.90050211861205,
   "min_gradient_pct": -30.48383403903898,
   "suppressed_max_gradient_pct": 45.17832131912769,
   "suppressed_location_m": [
    246.0,
    248.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 42.32747619723417,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 342.0,
   "end_distance_m": 345.0,
   "start_elevation_m": 269.630677832695,
   "end_elevation_m": 270.90050211861205,
   "min_gradient_pct": -20.955152788629523
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 37.441892977074076,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 341.0,
   "end_distance_m": 346.0,
   "start_elevation_m": 269.32118217193624,
   "end_elevation_m": 271.19327682078995,
   "min_gradient_pct": -12.115860654491826
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.582864356533264,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 29.0,
   "end_distance_m": 39.0,
   "start_elevation_m": 241.47448762553412,
   "end_elevation_m": 243.83277406118745,
   "min_gradient_pct": -6.553524719823258,
   "suppressed_max_gradient_pct": 28.20643429923905,
   "suppressed_location_m": [
    59.0,
    69.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.17918184956781,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 18.0,
   "end_distance_m": 38.0,
   "start_elevation_m": 238.95840152793025,
   "end_elevation_m": 243.5942378978438,
   "min_gradient_pct": -2.6104564162784527,
   "suppressed_max_gradient_pct": 26.411968019729528,
   "suppressed_location_m": [
    49.0,
    69.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.94305478721435,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 16.0,
   "end_distance_m": 41.0,
   "start_elevation_m": 238.5711764927044,
   "end_elevation_m": 244.306940189508,
   "min_gradient_pct": -1.8484490703556276,
   "suppressed_max_gradient_pct": 26.154028087368943,
   "suppressed_location_m": [
    44.0,
    69.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 13.535440281511114,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 371.0,
   "end_distance_m": 421.0,
   "start_elevation_m": 271.3637309804008,
   "end_elevation_m": 278.1314511211564,
   "min_gradient_pct": 0.35698848630647717,
   "suppressed_max_gradient_pct": 24.732769280654338,
   "suppressed_location_m": [
    19.0,
    69.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 9.984936048617215,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 320.0,
   "end_distance_m": 420.0,
   "start_elevation_m": 268.084579037041,
   "end_elevation_m": 278.0695150856582,
   "min_gradient_pct": 3.115082418838824,
   "suppressed_max_gradient_pct": 19.43286628889979,
   "suppressed_location_m": [
    1.0,
    101.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.44,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 90.0,
  "shape_class": "sustained"
 },
 "length_m": 425.8706811206991,
 "start_elevation_m": 235.19531653747742,
 "end_elevation_m": 278.269509361346,
 "endpoint_gain_m": 43.0741928238686,
 "overall_gradient_pct": 10.114383246697518,
 "accumulated_ascent_m": 48.20474941480771,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 37.441892977074076,
   "start_distance_m": 341.0,
   "end_distance_m": 346.0,
   "midpoint_distance_m": 343.5,
   "start_elevation_m": 269.32118217193624,
   "end_elevation_m": 271.19327682078995,
   "start_xy": [
    919386.484513053,
    6524817.514217266
   ],
   "end_xy": [
    919387.9282515846,
    6524812.73930365
   ]
  },
  "max_10m": {
   "gradient_pct": 23.582864356533264,
   "start_distance_m": 29.0,
   "end_distance_m": 39.0,
   "midpoint_distance_m": 34.0,
   "start_elevation_m": 241.47448762553412,
   "end_elevation_m": 243.83277406118745,
   "start_xy": [
    919297.0663818988,
    6525000.746293148
   ],
   "end_xy": [
    919287.8393753109,
    6524996.891121372
   ]
  },
  "max_20m": {
   "gradient_pct": 23.17918184956781,
   "start_distance_m": 18.0,
   "end_distance_m": 38.0,
   "midpoint_distance_m": 28.0,
   "start_elevation_m": 238.95840152793025,
   "end_elevation_m": 243.5942378978438,
   "start_xy": [
    919307.5008582583,
    6525004.075468795
   ],
   "end_xy": [
    919288.7620759697,
    6524997.276638549
   ]
  },
  "max_25m": {
   "gradient_pct": 22.94305478721435,
   "start_distance_m": 16.0,
   "end_distance_m": 41.0,
   "midpoint_distance_m": 28.5,
   "start_elevation_m": 238.5711764927044,
   "end_elevation_m": 244.306940189508,
   "start_xy": [
    919309.4569851184,
    6525004.492083374
   ],
   "end_xy": [
    919285.9939739933,
    6524996.120087016
   ]
  },
  "max_50m": {
   "gradient_pct": 13.535440281511114,
   "start_distance_m": 371.0,
   "end_distance_m": 421.0,
   "midpoint_distance_m": 396.0,
   "start_elevation_m": 271.3637309804008,
   "end_elevation_m": 278.1314511211564,
   "start_xy": [
    919399.6443900771,
    6524793.090214776
   ],
   "end_xy": [
    919408.3239762393,
    6524759.708835673
   ]
  },
  "max_100m": {
   "gradient_pct": 9.984936048617215,
   "start_distance_m": 320.0,
   "end_distance_m": 420.0,
   "midpoint_distance_m": 370.0,
   "start_elevation_m": 268.084579037041,
   "end_elevation_m": 278.0695150856582,
   "start_xy": [
    919382.2431342812,
    6524838.069134706
   ],
   "end_xy": [
    919407.9281334993,
    6524760.627153986
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.115860654491826,
   "start_distance_m": 381.0,
   "end_distance_m": 386.0,
   "midpoint_distance_m": 383.5,
   "start_elevation_m": 272.6273811563953,
   "end_elevation_m": 272.0215881236707,
   "start_xy": [
    919392.9918066105,
    6524796.6458293665
   ],
   "end_xy": [
    919394.7836821835,
    6524791.977940987
   ]
  },
  "min_10m": {
   "gradient_pct": -6.553524719823258,
   "start_distance_m": 89.0,
   "end_distance_m": 99.0,
   "midpoint_distance_m": 94.0,
   "start_elevation_m": 254.96668959457762,
   "end_elevation_m": 254.3113371225953,
   "start_xy": [
    919240.2315300347,
    6525000.773730756
   ],
   "end_xy": [
    919248.1471250802,
    6524994.662809788
   ]
  },
  "min_20m": {
   "gradient_pct": -2.6104564162784527,
   "start_distance_m": 279.0,
   "end_distance_m": 299.0,
   "midpoint_distance_m": 289.0,
   "start_elevation_m": 267.92507368354575,
   "end_elevation_m": 267.40298240029006,
   "start_xy": [
    919364.5714895341,
    6524874.435821659
   ],
   "end_xy": [
    919375.7415020163,
    6524857.861430134
   ]
  },
  "min_25m": {
   "gradient_pct": -1.8484490703556276,
   "start_distance_m": 279.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 291.5,
   "start_elevation_m": 267.92507368354575,
   "end_elevation_m": 267.46296141595684,
   "start_xy": [
    919364.5714895341,
    6524874.435821659
   ],
   "end_xy": [
    919377.724108436,
    6524853.27130249
   ]
  },
  "min_50m": {
   "gradient_pct": 0.35698848630647717,
   "start_distance_m": 251.0,
   "end_distance_m": 301.0,
   "midpoint_distance_m": 276.0,
   "start_elevation_m": 267.2285497966868,
   "end_elevation_m": 267.40704403984006,
   "start_xy": [
    919347.4306720478,
    6524896.237984292
   ],
   "end_xy": [
    919376.5345445841,
    6524856.025379076
   ]
  },
  "min_100m": {
   "gradient_pct": 3.115082418838824,
   "start_distance_m": 241.0,
   "end_distance_m": 341.0,
   "midpoint_distance_m": 291.0,
   "start_elevation_m": 266.2060997530974,
   "end_elevation_m": 269.32118217193624,
   "start_xy": [
    919339.9440449852,
    6524902.867495226
   ],
   "end_xy": [
    919386.484513053,
    6524817.514217266
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 42.8952178980353,
   "start_distance_m": 343.0,
   "end_distance_m": 345.0,
   "midpoint_distance_m": 344.0,
   "start_elevation_m": 270.04259776065135,
   "end_elevation_m": 270.90050211861205,
   "start_xy": [
    919386.9247910134,
    6524815.563280229
   ],
   "end_xy": [
    919387.5775068691,
    6524813.675774763
   ]
  },
  "max_3m": {
   "gradient_pct": 42.32747619723417,
   "start_distance_m": 342.0,
   "end_distance_m": 345.0,
   "midpoint_distance_m": 343.5,
   "start_elevation_m": 269.630677832695,
   "end_elevation_m": 270.90050211861205,
   "start_xy": [
    919386.7046520332,
    6524816.538748748
   ],
   "end_xy": [
    919387.5775068691,
    6524813.675774763
   ]
  }
 },
 "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": 0.016,
   "windows_resited": [
    2.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.089,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.16,
   "windows_resited": [
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 44.0,
     "end_m": 69.0,
     "raw_pct": 26.15,
     "reason": "hump"
    },
    {
     "window_m": 20.0,
     "start_m": 49.0,
     "end_m": 69.0,
     "raw_pct": 26.41,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.234,
   "obstruction_max_height_m": 14.76,
   "flagged_windows_m": [
    2,
    3,
    5,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    42.0,
    71.0
   ],
   [
    243.0,
    280.0
   ]
  ],
  "review": [
   "short_window_divergence"
  ],
  "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_E919-N6524_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E919-N6525_0m5.tif"
  ],
  "calculated_at": "2026-09-17T03:44:38+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": [
   "E919-N6524",
   "E919-N6525"
  ],
  "elevation_blocks": [
   "21LHD6PL@2025-03-07"
  ],
  "ign_dalles": [
   "LHD_FXX_0919_6525_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0919_6526_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6PL"
  ],
  "ign_editions": [
   "2025-03-07"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0919_6525_MNT_O_0M50_LAMB93_IGN69": "2025-03-07",
   "LHD_FXX_0919_6526_MNT_O_0M50_LAMB93_IGN69": "2025-03-07"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 24,
   "stations_resolved": 24,
   "width_median_m": 4.25,
   "width_p10_m": 1.98,
   "width_min_m": 1.25,
   "width_max_m": 8.0,
   "bounded_share": 0.5,
   "unbounded_share": 0.5,
   "confidence_median": 0.263,
   "width_median_bounded_m": 4.25,
   "window_m": [
    16.0,
    41.0
   ],
   "width_at_max25_m": 4.25,
   "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": 24,
    "stations_resolved": 24,
    "width_median_m": 3.62,
    "width_p10_m": 1.25,
    "width_min_m": 0.5,
    "width_max_m": 9.0,
    "bounded_share": 0.958,
    "unbounded_share": 0.042,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.5,
    "window_m": [
     16.0,
     41.0
    ],
    "width_at_max25_m": 4.5,
    "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": "Conjux",
  "county": "Savoie",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}