{
 "ocl_version": "0.1.0",
 "name": "Impasse de Bramefond",
 "slug": "impasse-de-bramefond",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.85034053847056,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 304.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 237.39766796336127,
   "end_elevation_m": 238.15467477413068,
   "min_gradient_pct": -11.713321284959477
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 32.208739369413784,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 303.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 237.18841259304827,
   "end_elevation_m": 238.15467477413068,
   "min_gradient_pct": -10.612010134497988,
   "suppressed_max_gradient_pct": 35.152423935360844,
   "suppressed_location_m": [
    186.0,
    189.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.64881010539989,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 301.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 236.7222342688607,
   "end_elevation_m": 238.15467477413068,
   "min_gradient_pct": -9.119751435393368
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.24738547589186,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 300.0,
   "end_distance_m": 310.0,
   "start_elevation_m": 236.5911869849647,
   "end_elevation_m": 239.0159255325539,
   "min_gradient_pct": -7.697623950113552
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 19.622274369313573,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 286.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 234.23021990026797,
   "end_elevation_m": 238.15467477413068,
   "min_gradient_pct": -5.223003215977826
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.073652490109794,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 283.0,
   "end_distance_m": 308.0,
   "start_elevation_m": 233.58599342349277,
   "end_elevation_m": 238.60440654602021,
   "min_gradient_pct": -4.627919282412677
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.81593144280822,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 277.0,
   "end_distance_m": 327.0,
   "start_elevation_m": 232.71121778421656,
   "end_elevation_m": 241.11918350562067,
   "min_gradient_pct": -1.6215087773231858
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.515459579800904,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 215.0,
   "end_distance_m": 315.0,
   "start_elevation_m": 226.1800531859484,
   "end_elevation_m": 239.6955127657493,
   "min_gradient_pct": 2.039486247772629
  }
 ],
 "shape": {
  "ascent_concentration": 0.419,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 56.0,
  "shape_class": "sustained"
 },
 "length_m": 508.6999999998402,
 "start_elevation_m": 208.34099485107578,
 "end_elevation_m": 247.78673820705504,
 "endpoint_gain_m": 39.44574335597926,
 "overall_gradient_pct": 7.754225153526962,
 "accumulated_ascent_m": 41.43806368636089,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.64881010539989,
   "start_distance_m": 301.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 303.5,
   "start_elevation_m": 236.7222342688607,
   "end_elevation_m": 238.15467477413068,
   "start_xy": [
    604008.1624720042,
    6462043.687732911
   ],
   "end_xy": [
    604009.9118955537,
    6462048.37169675
   ]
  },
  "max_10m": {
   "gradient_pct": 24.24738547589186,
   "start_distance_m": 300.0,
   "end_distance_m": 310.0,
   "midpoint_distance_m": 305.0,
   "start_elevation_m": 236.5911869849647,
   "end_elevation_m": 239.0159255325539,
   "start_xy": [
    604007.8125872944,
    6462042.750940143
   ],
   "end_xy": [
    604011.3114343933,
    6462052.118867821
   ]
  },
  "max_20m": {
   "gradient_pct": 19.622274369313573,
   "start_distance_m": 286.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 296.0,
   "start_elevation_m": 234.23021990026797,
   "end_elevation_m": 238.15467477413068,
   "start_xy": [
    604000.0522619346,
    6462031.479060485
   ],
   "end_xy": [
    604009.9118955537,
    6462048.37169675
   ]
  },
  "max_25m": {
   "gradient_pct": 20.073652490109794,
   "start_distance_m": 283.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 295.5,
   "start_elevation_m": 233.58599342349277,
   "end_elevation_m": 238.60440654602021,
   "start_xy": [
    603997.5434892403,
    6462029.834049977
   ],
   "end_xy": [
    604010.6116649735,
    6462050.245282285
   ]
  },
  "max_50m": {
   "gradient_pct": 16.81593144280822,
   "start_distance_m": 277.0,
   "end_distance_m": 327.0,
   "midpoint_distance_m": 302.0,
   "start_elevation_m": 232.71121778421656,
   "end_elevation_m": 241.11918350562067,
   "start_xy": [
    603992.5259438517,
    6462026.544028964
   ],
   "end_xy": [
    604013.6197767868,
    6462068.933946507
   ]
  },
  "max_100m": {
   "gradient_pct": 13.515459579800904,
   "start_distance_m": 215.0,
   "end_distance_m": 315.0,
   "midpoint_distance_m": 265.0,
   "start_elevation_m": 226.1800531859484,
   "end_elevation_m": 239.6955127657493,
   "start_xy": [
    603988.8121627308,
    6462042.425165549
   ],
   "end_xy": [
    604012.1595824014,
    6462057.023118141
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.119751435393368,
   "start_distance_m": 376.0,
   "end_distance_m": 381.0,
   "midpoint_distance_m": 378.5,
   "start_elevation_m": 242.43544086673887,
   "end_elevation_m": 241.9794532949692,
   "start_xy": [
    604023.5226807556,
    6462116.766542919
   ],
   "end_xy": [
    604024.0281135862,
    6462121.740931087
   ]
  },
  "min_10m": {
   "gradient_pct": -7.697623950113552,
   "start_distance_m": 373.0,
   "end_distance_m": 383.0,
   "midpoint_distance_m": 378.0,
   "start_elevation_m": 242.62876319778525,
   "end_elevation_m": 241.8590008027739,
   "start_xy": [
    604023.2194210573,
    6462113.781910017
   ],
   "end_xy": [
    604024.2302867185,
    6462123.730686355
   ]
  },
  "min_20m": {
   "gradient_pct": -5.223003215977826,
   "start_distance_m": 370.0,
   "end_distance_m": 390.0,
   "midpoint_distance_m": 380.0,
   "start_elevation_m": 242.694264647053,
   "end_elevation_m": 241.64966400385742,
   "start_xy": [
    604022.9161613588,
    6462110.797277116
   ],
   "end_xy": [
    604024.9378926813,
    6462130.694829792
   ]
  },
  "min_25m": {
   "gradient_pct": -4.627919282412677,
   "start_distance_m": 367.0,
   "end_distance_m": 392.0,
   "midpoint_distance_m": 379.5,
   "start_elevation_m": 242.78210051518818,
   "end_elevation_m": 241.625120694585,
   "start_xy": [
    604022.405606784,
    6462107.851930252
   ],
   "end_xy": [
    604025.1400658136,
    6462132.684585059
   ]
  },
  "min_50m": {
   "gradient_pct": -1.6215087773231858,
   "start_distance_m": 353.0,
   "end_distance_m": 403.0,
   "midpoint_distance_m": 378.0,
   "start_elevation_m": 242.58678136646327,
   "end_elevation_m": 241.77602697780168,
   "start_xy": [
    604018.6264133366,
    6462094.371659599
   ],
   "end_xy": [
    604026.7965603162,
    6462143.47366155
   ]
  },
  "min_100m": {
   "gradient_pct": 2.039486247772629,
   "start_distance_m": 362.0,
   "end_distance_m": 462.0,
   "midpoint_distance_m": 412.0,
   "start_elevation_m": 242.8568734109272,
   "end_elevation_m": 244.89635965869982,
   "start_xy": [
    604021.0558948385,
    6462103.037547876
   ],
   "end_xy": [
    604045.8864732508,
    6462199.06965003
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.85034053847056,
   "start_distance_m": 304.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 305.0,
   "start_elevation_m": 237.39766796336127,
   "end_elevation_m": 238.15467477413068,
   "start_xy": [
    604009.212126134,
    6462046.4981112145
   ],
   "end_xy": [
    604009.9118955537,
    6462048.37169675
   ]
  },
  "max_3m": {
   "gradient_pct": 32.208739369413784,
   "start_distance_m": 303.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 304.5,
   "start_elevation_m": 237.18841259304827,
   "end_elevation_m": 238.15467477413068,
   "start_xy": [
    604008.862241424,
    6462045.561318446
   ],
   "end_xy": [
    604009.9118955537,
    6462048.37169675
   ]
  }
 },
 "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": 0.081,
   "windows_resited": [
    3.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.188,
   "obstruction_max_height_m": 26.16,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    160.0,
    200.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "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-mc2",
   "road_pbf": "block-batch-fr-mc2.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_E603-N6461_0m5@22LHD3JM-2025-05-14.tif",
   "data/cache/fr/ign-lidarhd_dtm_E603-N6462_0m5@22LHD3JM-2025-05-14.tif",
   "data/cache/fr/ign-lidarhd_dtm_E604-N6461_0m5@22LHD3JM-2025-05-14.tif",
   "data/cache/fr/ign-lidarhd_dtm_E604-N6462_0m5@22LHD3JM-2025-05-14.tif"
  ],
  "calculated_at": "2026-09-22T17:26:02+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc2",
  "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": [
   "E603-N6461",
   "E603-N6462",
   "E604-N6461",
   "E604-N6462"
  ],
  "elevation_blocks": [
   "22LHD3JM@2025-05-14"
  ],
  "ign_dalles": [
   "LHD_FXX_0603_6462_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0603_6463_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0604_6462_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0604_6463_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD3JM"
  ],
  "ign_editions": [
   "2025-05-14"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0603_6462_MNT_O_0M50_LAMB93_IGN69": "2025-05-14",
   "LHD_FXX_0603_6463_MNT_O_0M50_LAMB93_IGN69": "2025-05-14",
   "LHD_FXX_0604_6462_MNT_O_0M50_LAMB93_IGN69": "2025-05-14",
   "LHD_FXX_0604_6463_MNT_O_0M50_LAMB93_IGN69": "2025-05-14"
  },
  "route_cut_m": 508.7,
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "structure_mask_ranges_m": [
   [
    165.6,
    195.6
   ]
  ],
  "carriageway": {
   "stations": 27,
   "stations_resolved": 27,
   "width_median_m": 5.5,
   "width_p10_m": 1.4,
   "width_min_m": 0.5,
   "width_max_m": 12.0,
   "bounded_share": 0.593,
   "unbounded_share": 0.407,
   "confidence_median": 0.64,
   "width_median_bounded_m": 3.62,
   "window_m": [
    283.0,
    308.0
   ],
   "width_at_max25_m": 2.0,
   "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": 27,
    "stations_resolved": 27,
    "width_median_m": 3.75,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.778,
    "unbounded_share": 0.222,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.5,
    "window_m": [
     283.0,
     308.0
    ],
    "width_at_max25_m": 1.0,
    "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": "Laguenne-sur-Avalouze",
  "county": "Corr\u00e8ze",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}