{
 "ocl_version": "0.1.0",
 "name": "Chemin du Brunet",
 "slug": "chemin-du-brunet",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.270698148089423,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 88.0,
   "end_distance_m": 90.0,
   "start_elevation_m": 963.2570114548291,
   "end_elevation_m": 963.8024254177909,
   "min_gradient_pct": -2.478022621613718
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.930481314790693,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 87.0,
   "end_distance_m": 90.0,
   "start_elevation_m": 962.9945109783472,
   "end_elevation_m": 963.8024254177909,
   "min_gradient_pct": -1.6962391207130167
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.689059578229717,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 87.0,
   "end_distance_m": 92.0,
   "start_elevation_m": 962.9945109783472,
   "end_elevation_m": 964.3289639572587,
   "min_gradient_pct": 0.48639210099281627
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.237519583893345,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 82.0,
   "end_distance_m": 92.0,
   "start_elevation_m": 961.7052119988693,
   "end_elevation_m": 964.3289639572587,
   "min_gradient_pct": 0.7301860845097963
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.817296635369757,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 74.0,
   "end_distance_m": 94.0,
   "start_elevation_m": 959.6700029823498,
   "end_elevation_m": 964.8334623094238,
   "min_gradient_pct": 2.4496475726607514
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.5451025813436,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 70.0,
   "end_distance_m": 95.0,
   "start_elevation_m": 958.6936853423252,
   "end_elevation_m": 965.0799609876611,
   "min_gradient_pct": 3.2022026948852726
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 24.035953235138777,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 62.0,
   "end_distance_m": 112.0,
   "start_elevation_m": 956.8298964479266,
   "end_elevation_m": 968.847873065496,
   "min_gradient_pct": 6.445142578537343
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.464841775117748,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 29.0,
   "end_distance_m": 129.0,
   "start_elevation_m": 950.5855430684305,
   "end_elevation_m": 972.0503848435483,
   "min_gradient_pct": 8.583073912464783
  }
 ],
 "shape": {
  "ascent_concentration": 0.409,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 139.0,
  "shape_class": "sustained"
 },
 "length_m": 221.85725837929445,
 "start_elevation_m": 946.8711888427562,
 "end_elevation_m": 979.3398876435142,
 "endpoint_gain_m": 32.468698800758034,
 "overall_gradient_pct": 14.634949984484384,
 "accumulated_ascent_m": 32.54383156523079,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.689059578229717,
   "start_distance_m": 87.0,
   "end_distance_m": 92.0,
   "midpoint_distance_m": 89.5,
   "start_elevation_m": 962.9945109783472,
   "end_elevation_m": 964.3289639572587,
   "start_xy": [
    685925.9139716481,
    6478084.537633605
   ],
   "end_xy": [
    685926.1005625817,
    6478089.5341507755
   ]
  },
  "max_10m": {
   "gradient_pct": 26.237519583893345,
   "start_distance_m": 82.0,
   "end_distance_m": 92.0,
   "midpoint_distance_m": 87.0,
   "start_elevation_m": 961.7052119988693,
   "end_elevation_m": 964.3289639572587,
   "start_xy": [
    685925.7273807145,
    6478079.541116436
   ],
   "end_xy": [
    685926.1005625817,
    6478089.5341507755
   ]
  },
  "max_20m": {
   "gradient_pct": 25.817296635369757,
   "start_distance_m": 74.0,
   "end_distance_m": 94.0,
   "midpoint_distance_m": 84.0,
   "start_elevation_m": 959.6700029823498,
   "end_elevation_m": 964.8334623094238,
   "start_xy": [
    685925.4288352206,
    6478071.5466889655
   ],
   "end_xy": [
    685926.1751989551,
    6478091.532757643
   ]
  },
  "max_25m": {
   "gradient_pct": 25.5451025813436,
   "start_distance_m": 70.0,
   "end_distance_m": 95.0,
   "midpoint_distance_m": 82.5,
   "start_elevation_m": 958.6936853423252,
   "end_elevation_m": 965.0799609876611,
   "start_xy": [
    685925.2795624738,
    6478067.54947523
   ],
   "end_xy": [
    685926.2125171418,
    6478092.532061077
   ]
  },
  "max_50m": {
   "gradient_pct": 24.035953235138777,
   "start_distance_m": 62.0,
   "end_distance_m": 112.0,
   "midpoint_distance_m": 87.0,
   "start_elevation_m": 956.8298964479266,
   "end_elevation_m": 968.847873065496,
   "start_xy": [
    685924.98101698,
    6478059.555047759
   ],
   "end_xy": [
    685918.630931554,
    6478107.083180154
   ]
  },
  "max_100m": {
   "gradient_pct": 21.464841775117748,
   "start_distance_m": 29.0,
   "end_distance_m": 129.0,
   "midpoint_distance_m": 79.0,
   "start_elevation_m": 950.5855430684305,
   "end_elevation_m": 972.0503848435483,
   "start_xy": [
    685932.997215227,
    6478028.0222134115
   ],
   "end_xy": [
    685906.2163498738,
    6478118.671366341
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.48639210099281627,
   "start_distance_m": 216.0,
   "end_distance_m": 221.0,
   "midpoint_distance_m": 218.5,
   "start_elevation_m": 979.2522840386223,
   "end_elevation_m": 979.2766036436719,
   "start_xy": [
    685940.6775946618,
    6478193.052397018
   ],
   "end_xy": [
    685943.8108057142,
    6478196.948932467
   ]
  },
  "min_10m": {
   "gradient_pct": 0.7301860845097963,
   "start_distance_m": 211.0,
   "end_distance_m": 221.0,
   "midpoint_distance_m": 216.0,
   "start_elevation_m": 979.203585035221,
   "end_elevation_m": 979.2766036436719,
   "start_xy": [
    685937.5443836096,
    6478189.15586157
   ],
   "end_xy": [
    685943.8108057142,
    6478196.948932467
   ]
  },
  "min_20m": {
   "gradient_pct": 2.4496475726607514,
   "start_distance_m": 201.0,
   "end_distance_m": 221.0,
   "midpoint_distance_m": 211.0,
   "start_elevation_m": 978.7866741291398,
   "end_elevation_m": 979.2766036436719,
   "start_xy": [
    685931.2779615048,
    6478181.362790673
   ],
   "end_xy": [
    685943.8108057142,
    6478196.948932467
   ]
  },
  "min_25m": {
   "gradient_pct": 3.2022026948852726,
   "start_distance_m": 196.0,
   "end_distance_m": 221.0,
   "midpoint_distance_m": 208.5,
   "start_elevation_m": 978.4760529699506,
   "end_elevation_m": 979.2766036436719,
   "start_xy": [
    685928.1447504524,
    6478177.466255224
   ],
   "end_xy": [
    685943.8108057142,
    6478196.948932467
   ]
  },
  "min_50m": {
   "gradient_pct": 6.445142578537343,
   "start_distance_m": 171.0,
   "end_distance_m": 221.0,
   "midpoint_distance_m": 196.0,
   "start_elevation_m": 976.0540323544033,
   "end_elevation_m": 979.2766036436719,
   "start_xy": [
    685916.3386208893,
    6478155.46970468
   ],
   "end_xy": [
    685943.8108057142,
    6478196.948932467
   ]
  },
  "min_100m": {
   "gradient_pct": 8.583073912464783,
   "start_distance_m": 121.0,
   "end_distance_m": 221.0,
   "midpoint_distance_m": 171.0,
   "start_elevation_m": 970.6935297312071,
   "end_elevation_m": 979.2766036436719,
   "start_xy": [
    685912.2063900271,
    6478113.368591694
   ],
   "end_xy": [
    685943.8108057142,
    6478196.948932467
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.270698148089423,
   "start_distance_m": 88.0,
   "end_distance_m": 90.0,
   "midpoint_distance_m": 89.0,
   "start_elevation_m": 963.2570114548291,
   "end_elevation_m": 963.8024254177909,
   "start_xy": [
    685925.9512898348,
    6478085.536937039
   ],
   "end_xy": [
    685926.0259262082,
    6478087.535543907
   ]
  },
  "max_3m": {
   "gradient_pct": 26.930481314790693,
   "start_distance_m": 87.0,
   "end_distance_m": 90.0,
   "midpoint_distance_m": 88.5,
   "start_elevation_m": 962.9945109783472,
   "end_elevation_m": 963.8024254177909,
   "start_xy": [
    685925.9139716481,
    6478084.537633605
   ],
   "end_xy": [
    685926.0259262082,
    6478087.535543907
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.215,
   "obstruction_max_height_m": 18.99,
   "flagged_windows_m": [
    10,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "1cc9fdcd6556a02163cb21acb2293cad3067d2a1",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:8c94015b54267da4",
   "python": "3.14.4",
   "numpy": "2.5.3",
   "rasterio": "1.5.1",
   "pyproj": "3.8.0",
   "laspy": "2.7.0",
   "shapely": "2.1.2",
   "pyosmium": "4.3.1",
   "libosmium": "2.23.1",
   "gdal": "3.12.4",
   "proj": "9.8.1",
   "run_id": "fr-mc4",
   "road_pbf": "block-batch-fr-mc4.osm.pbf",
   "region_key": "france",
   "crs": "EPSG:2154",
   "elevation_provider_key": "ign-lidarhd",
   "tile_index": "wms-grid",
   "authority": "bdtopo",
   "registry_pbf": "france-vosges-2026-09-16.osm.pbf",
   "tile_index_snapshot": "sha256:af4eae1f5df9e232"
  },
  "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_E685-N6477_0m5@22LHD3KM-2025-09-17.tif",
   "data/cache/fr/ign-lidarhd_dtm_E685-N6478_0m5@22LHD3KM-2025-09-17.tif"
  ],
  "calculated_at": "2026-09-22T18:35:11+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc4",
  "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": [
   "E685-N6477",
   "E685-N6478"
  ],
  "elevation_blocks": [
   "22LHD3KM@2025-09-17"
  ],
  "ign_dalles": [
   "LHD_FXX_0685_6478_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0685_6479_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD3KM"
  ],
  "ign_editions": [
   "2025-09-17"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0685_6478_MNT_O_0M50_LAMB93_IGN69": "2025-09-17",
   "LHD_FXX_0685_6479_MNT_O_0M50_LAMB93_IGN69": "2025-09-17"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 14,
   "stations_resolved": 14,
   "width_median_m": 5.62,
   "width_p10_m": 4.33,
   "width_min_m": 4.25,
   "width_max_m": 12.0,
   "bounded_share": 0.643,
   "unbounded_share": 0.357,
   "confidence_median": 0.616,
   "width_median_bounded_m": 5.0,
   "window_m": [
    70.0,
    95.0
   ],
   "width_at_max25_m": 4.75,
   "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": 14,
    "stations_resolved": 14,
    "width_median_m": 5.0,
    "width_p10_m": 2.33,
    "width_min_m": 1.5,
    "width_max_m": 12.0,
    "bounded_share": 0.714,
    "unbounded_share": 0.286,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.88,
    "window_m": [
     70.0,
     95.0
    ],
    "width_at_max25_m": 3.25,
    "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": "\u00c9gliseneuve-d'Entraigues",
  "county": "Puy-de-D\u00f4me",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}