{
 "ocl_version": "0.1.0",
 "name": "Chemin de l'\u00c9bron",
 "slug": "chemin-de-l-ebron",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.358762852006976,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 265.0,
   "end_distance_m": 267.0,
   "start_elevation_m": 731.4612206010482,
   "end_elevation_m": 731.9283958580884,
   "min_gradient_pct": -4.644292544895734
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.815026972898522,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 240.0,
   "end_distance_m": 243.0,
   "start_elevation_m": 726.2491898583144,
   "end_elevation_m": 726.9336406675013,
   "min_gradient_pct": -3.903293026189658
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.659961793974617,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 238.0,
   "end_distance_m": 243.0,
   "start_elevation_m": 725.8006425778026,
   "end_elevation_m": 726.9336406675013,
   "min_gradient_pct": -3.4312359059981645
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.267572534517512,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 42.0,
   "end_distance_m": 52.0,
   "start_elevation_m": 699.6325932424008,
   "end_elevation_m": 701.8593504958526,
   "min_gradient_pct": -2.564547215854418
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.68493459214119,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 232.0,
   "end_distance_m": 252.0,
   "start_elevation_m": 724.5537257800496,
   "end_elevation_m": 728.8907126984778,
   "min_gradient_pct": 0.6108042476228093
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.470590193243424,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 235.0,
   "end_distance_m": 260.0,
   "start_elevation_m": 725.1836896798046,
   "end_elevation_m": 730.5513372281155,
   "min_gradient_pct": 2.710618273669752
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.26063578168646,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 232.0,
   "end_distance_m": 282.0,
   "start_elevation_m": 724.5537257800496,
   "end_elevation_m": 734.6840436708928,
   "min_gradient_pct": 7.105238523793332
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.92238731826012,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 214.0,
   "end_distance_m": 314.0,
   "start_elevation_m": 721.5766244906654,
   "end_elevation_m": 739.4990118089255,
   "min_gradient_pct": 9.742367865785695
  }
 ],
 "shape": {
  "ascent_concentration": 0.348,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 160.0,
  "shape_class": "sustained"
 },
 "length_m": 334.2416318643601,
 "start_elevation_m": 693.6480990776355,
 "end_elevation_m": 739.6179957827162,
 "endpoint_gain_m": 45.969896705080714,
 "overall_gradient_pct": 13.753492181289953,
 "accumulated_ascent_m": 46.23595961181718,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.659961793974617,
   "start_distance_m": 238.0,
   "end_distance_m": 243.0,
   "midpoint_distance_m": 240.5,
   "start_elevation_m": 725.8006425778026,
   "end_elevation_m": 726.9336406675013,
   "start_xy": [
    910967.7367515977,
    6420320.07876124
   ],
   "end_xy": [
    910972.6410175876,
    6420321.05250407
   ]
  },
  "max_10m": {
   "gradient_pct": 22.267572534517512,
   "start_distance_m": 42.0,
   "end_distance_m": 52.0,
   "midpoint_distance_m": 47.0,
   "start_elevation_m": 699.6325932424008,
   "end_elevation_m": 701.8593504958526,
   "start_xy": [
    910779.9842576885,
    6420329.107930411
   ],
   "end_xy": [
    910789.4745377117,
    6420332.259848094
   ]
  },
  "max_20m": {
   "gradient_pct": 21.68493459214119,
   "start_distance_m": 232.0,
   "end_distance_m": 252.0,
   "midpoint_distance_m": 242.0,
   "start_elevation_m": 724.5537257800496,
   "end_elevation_m": 728.8907126984778,
   "start_xy": [
    910961.8516324097,
    6420318.9102698425
   ],
   "end_xy": [
    910981.497192087,
    6420322.654075309
   ]
  },
  "max_25m": {
   "gradient_pct": 21.470590193243424,
   "start_distance_m": 235.0,
   "end_distance_m": 260.0,
   "midpoint_distance_m": 247.5,
   "start_elevation_m": 725.1836896798046,
   "end_elevation_m": 730.5513372281155,
   "start_xy": [
    910964.7941920037,
    6420319.494515541
   ],
   "end_xy": [
    910989.3727113238,
    6420324.059847961
   ]
  },
  "max_50m": {
   "gradient_pct": 20.26063578168646,
   "start_distance_m": 232.0,
   "end_distance_m": 282.0,
   "midpoint_distance_m": 257.0,
   "start_elevation_m": 724.5537257800496,
   "end_elevation_m": 734.6840436708928,
   "start_xy": [
    910961.8516324097,
    6420318.9102698425
   ],
   "end_xy": [
    911011.0588680335,
    6420327.313897976
   ]
  },
  "max_100m": {
   "gradient_pct": 17.92238731826012,
   "start_distance_m": 214.0,
   "end_distance_m": 314.0,
   "midpoint_distance_m": 264.0,
   "start_elevation_m": 721.5766244906654,
   "end_elevation_m": 739.4990118089255,
   "start_xy": [
    910944.0618944037,
    6420320.126690601
   ],
   "end_xy": [
    911042.9470798576,
    6420324.641455898
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.4312359059981645,
   "start_distance_m": 324.0,
   "end_distance_m": 329.0,
   "midpoint_distance_m": 326.5,
   "start_elevation_m": 739.8610355146996,
   "end_elevation_m": 739.6894737193996,
   "start_xy": [
    911052.9121460527,
    6420323.8063177485
   ],
   "end_xy": [
    911057.8946791502,
    6420323.388748674
   ]
  },
  "min_10m": {
   "gradient_pct": -2.564547215854418,
   "start_distance_m": 322.0,
   "end_distance_m": 332.0,
   "midpoint_distance_m": 327.0,
   "start_elevation_m": 739.8828143545152,
   "end_elevation_m": 739.6263596329297,
   "start_xy": [
    911050.9191328137,
    6420323.973345378
   ],
   "end_xy": [
    911060.8841990087,
    6420323.138207229
   ]
  },
  "min_20m": {
   "gradient_pct": 0.6108042476228093,
   "start_distance_m": 314.0,
   "end_distance_m": 334.0,
   "midpoint_distance_m": 324.0,
   "start_elevation_m": 739.4990118089255,
   "end_elevation_m": 739.6211726584501,
   "start_xy": [
    911042.9470798576,
    6420324.641455898
   ],
   "end_xy": [
    911062.8772122477,
    6420322.971179599
   ]
  },
  "min_25m": {
   "gradient_pct": 2.710618273669752,
   "start_distance_m": 309.0,
   "end_distance_m": 334.0,
   "midpoint_distance_m": 321.5,
   "start_elevation_m": 738.9435180900326,
   "end_elevation_m": 739.6211726584501,
   "start_xy": [
    911037.9645467601,
    6420325.059024973
   ],
   "end_xy": [
    911062.8772122477,
    6420322.971179599
   ]
  },
  "min_50m": {
   "gradient_pct": 7.105238523793332,
   "start_distance_m": 160.0,
   "end_distance_m": 210.0,
   "midpoint_distance_m": 185.0,
   "start_elevation_m": 717.6246205107022,
   "end_elevation_m": 721.1772397725989,
   "start_xy": [
    910893.9648907491,
    6420339.968909903
   ],
   "end_xy": [
    910940.30010846,
    6420321.352703534
   ]
  },
  "min_100m": {
   "gradient_pct": 9.742367865785695,
   "start_distance_m": 115.0,
   "end_distance_m": 215.0,
   "midpoint_distance_m": 165.0,
   "start_elevation_m": 711.9697953834091,
   "end_elevation_m": 721.7121632491948,
   "start_xy": [
    910850.019011686,
    6420348.701506951
   ],
   "end_xy": [
    910945.0522358031,
    6420319.988040276
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.358762852006976,
   "start_distance_m": 265.0,
   "end_distance_m": 267.0,
   "midpoint_distance_m": 266.0,
   "start_elevation_m": 731.4612206010482,
   "end_elevation_m": 731.9283958580884,
   "start_xy": [
    910994.2949108469,
    6420324.9384558685
   ],
   "end_xy": [
    910996.2637906561,
    6420325.289899032
   ]
  },
  "max_3m": {
   "gradient_pct": 22.815026972898522,
   "start_distance_m": 240.0,
   "end_distance_m": 243.0,
   "midpoint_distance_m": 241.5,
   "start_elevation_m": 726.2491898583144,
   "end_elevation_m": 726.9336406675013,
   "start_xy": [
    910969.6984579937,
    6420320.468258372
   ],
   "end_xy": [
    910972.6410175876,
    6420321.05250407
   ]
  }
 },
 "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": 0.259,
   "obstruction_max_height_m": 31.33,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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_E910-N6420_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E911-N6420_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:23:45+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": [
   "E910-N6420",
   "E911-N6420"
  ],
  "elevation_blocks": [
   "21LHD7PN@2025-02-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0910_6421_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0911_6421_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD7PN"
  ],
  "ign_editions": [
   "2025-02-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0910_6421_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0911_6421_MNT_O_0M50_LAMB93_IGN69": "2025-02-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 19,
   "stations_resolved": 19,
   "width_median_m": 4.25,
   "width_p10_m": 2.95,
   "width_min_m": 2.5,
   "width_max_m": 7.25,
   "bounded_share": 0.158,
   "unbounded_share": 0.842,
   "confidence_median": 0.0,
   "width_median_bounded_m": 2.75,
   "window_m": [
    235.0,
    260.0
   ],
   "width_at_max25_m": 4.5,
   "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": 19,
    "stations_resolved": 19,
    "width_median_m": 5.75,
    "width_p10_m": 0.95,
    "width_min_m": 0.0,
    "width_max_m": 12.0,
    "bounded_share": 0.632,
    "unbounded_share": 0.368,
    "confidence_median": 1.0,
    "width_median_bounded_m": 1.88,
    "window_m": [
     235.0,
     260.0
    ],
    "width_at_max25_m": 1.88,
    "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": "Lavars",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}