{
 "ocl_version": "0.1.0",
 "name": "Route de Courbons",
 "slug": "route-de-courbons-4",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 40.852841078219626,
   "diagnostic": true,
   "flags": [
    "no_bench_excluded"
   ],
   "start_distance_m": 4384.0,
   "end_distance_m": 4386.0,
   "start_elevation_m": 1047.7087374493174,
   "end_elevation_m": 1048.5257942708818,
   "min_gradient_pct": -17.641417069296494,
   "suppressed_max_gradient_pct": 44.08546028607816,
   "suppressed_location_m": [
    2996.0,
    2998.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.94530188435768,
   "diagnostic": true,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2844.0,
   "end_distance_m": 2847.0,
   "start_elevation_m": 877.4833747118877,
   "end_elevation_m": 878.5917337684184,
   "min_gradient_pct": -14.674269633186062,
   "suppressed_max_gradient_pct": 42.054612001686564,
   "suppressed_location_m": [
    2995.0,
    2998.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.664804476805784,
   "diagnostic": false,
   "flags": [
    "no_bench_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2842.0,
   "end_distance_m": 2847.0,
   "start_elevation_m": 876.9584935445781,
   "end_elevation_m": 878.5917337684184,
   "min_gradient_pct": -11.810851495763472,
   "suppressed_max_gradient_pct": 40.9714168934147,
   "suppressed_location_m": [
    2993.0,
    2998.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.76521691475864,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2837.0,
   "end_distance_m": 2847.0,
   "start_elevation_m": 875.8152120769425,
   "end_elevation_m": 878.5917337684184,
   "min_gradient_pct": -5.716969104040572
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.473594271360184,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2828.0,
   "end_distance_m": 2848.0,
   "start_elevation_m": 874.2722282802087,
   "end_elevation_m": 878.7669471344807,
   "min_gradient_pct": -0.8224731254097151
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.862098476649408,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2823.0,
   "end_distance_m": 2848.0,
   "start_elevation_m": 873.5514225153183,
   "end_elevation_m": 878.7669471344807,
   "min_gradient_pct": 0.17098028234249796
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 18.363575731932315,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2569.0,
   "end_distance_m": 2619.0,
   "start_elevation_m": 844.8906668221136,
   "end_elevation_m": 854.0724546880798,
   "min_gradient_pct": 0.9921808828285066
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.726509172869896,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2836.0,
   "end_distance_m": 2936.0,
   "start_elevation_m": 875.5971750091218,
   "end_elevation_m": 892.3236841819917,
   "min_gradient_pct": 2.437227864871147
  }
 ],
 "shape": {
  "ascent_concentration": 0.318,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 225.0,
  "shape_class": "sustained"
 },
 "length_m": 5370.140893686221,
 "start_elevation_m": 660.6056880888658,
 "end_elevation_m": 1171.3320972480992,
 "endpoint_gain_m": 510.7264091592334,
 "overall_gradient_pct": 9.510484347993634,
 "accumulated_ascent_m": 515.7561140690618,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.664804476805784,
   "start_distance_m": 2842.0,
   "end_distance_m": 2847.0,
   "midpoint_distance_m": 2844.5,
   "start_elevation_m": 876.9584935445781,
   "end_elevation_m": 878.5917337684184,
   "start_xy": [
    957796.4085936864,
    6339056.888207305
   ],
   "end_xy": [
    957792.5956016486,
    6339060.122568404
   ]
  },
  "max_10m": {
   "gradient_pct": 27.76521691475864,
   "start_distance_m": 2837.0,
   "end_distance_m": 2847.0,
   "midpoint_distance_m": 2842.0,
   "start_elevation_m": 875.8152120769425,
   "end_elevation_m": 878.5917337684184,
   "start_xy": [
    957800.3118281278,
    6339053.802019361
   ],
   "end_xy": [
    957792.5956016486,
    6339060.122568404
   ]
  },
  "max_20m": {
   "gradient_pct": 22.473594271360184,
   "start_distance_m": 2828.0,
   "end_distance_m": 2848.0,
   "midpoint_distance_m": 2838.0,
   "start_elevation_m": 874.2722282802087,
   "end_elevation_m": 878.7669471344807,
   "start_xy": [
    957808.633973205,
    6339050.37537358
   ],
   "end_xy": [
    957791.833003241,
    6339060.769440624
   ]
  },
  "max_25m": {
   "gradient_pct": 20.862098476649408,
   "start_distance_m": 2823.0,
   "end_distance_m": 2848.0,
   "midpoint_distance_m": 2835.5,
   "start_elevation_m": 873.5514225153183,
   "end_elevation_m": 878.7669471344807,
   "start_xy": [
    957813.2573871367,
    6339048.4716814775
   ],
   "end_xy": [
    957791.833003241,
    6339060.769440624
   ]
  },
  "max_50m": {
   "gradient_pct": 18.363575731932315,
   "start_distance_m": 2569.0,
   "end_distance_m": 2619.0,
   "midpoint_distance_m": 2594.0,
   "start_elevation_m": 844.8906668221136,
   "end_elevation_m": 854.0724546880798,
   "start_xy": [
    957924.5411546658,
    6338833.439622748
   ],
   "end_xy": [
    957904.4942805779,
    6338878.543869193
   ]
  },
  "max_100m": {
   "gradient_pct": 16.726509172869896,
   "start_distance_m": 2836.0,
   "end_distance_m": 2936.0,
   "midpoint_distance_m": 2886.0,
   "start_elevation_m": 875.5971750091218,
   "end_elevation_m": 892.3236841819917,
   "start_xy": [
    957801.2365109143,
    6339053.421280941
   ],
   "end_xy": [
    957710.6787576266,
    6339069.702173118
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.810851495763472,
   "start_distance_m": 3122.0,
   "end_distance_m": 3127.0,
   "midpoint_distance_m": 3124.5,
   "start_elevation_m": 913.7054454015839,
   "end_elevation_m": 913.1149028267957,
   "start_xy": [
    957596.2877159498,
    6339074.0224439055
   ],
   "end_xy": [
    957591.7162826845,
    6339071.9971049465
   ]
  },
  "min_10m": {
   "gradient_pct": -5.716969104040572,
   "start_distance_m": 3121.0,
   "end_distance_m": 3131.0,
   "midpoint_distance_m": 3126.0,
   "start_elevation_m": 913.6600933808076,
   "end_elevation_m": 913.0883964704035,
   "start_xy": [
    957597.202002603,
    6339074.427511698
   ],
   "end_xy": [
    957587.8223898194,
    6339071.561579167
   ]
  },
  "min_20m": {
   "gradient_pct": -0.8224731254097151,
   "start_distance_m": 1205.0,
   "end_distance_m": 1225.0,
   "midpoint_distance_m": 1215.0,
   "start_elevation_m": 729.4168891399313,
   "end_elevation_m": 729.2523945148494,
   "start_xy": [
    957124.4091137834,
    6338642.484476287
   ],
   "end_xy": [
    957127.6521466799,
    6338633.554334685
   ]
  },
  "min_25m": {
   "gradient_pct": 0.17098028234249796,
   "start_distance_m": 726.0,
   "end_distance_m": 751.0,
   "midpoint_distance_m": 738.5,
   "start_elevation_m": 706.2580031990868,
   "end_elevation_m": 706.3007482696725,
   "start_xy": [
    957421.6962012788,
    6338336.788524885
   ],
   "end_xy": [
    957398.4592349743,
    6338346.005087651
   ]
  },
  "min_50m": {
   "gradient_pct": 0.9921808828285066,
   "start_distance_m": 1638.0,
   "end_distance_m": 1688.0,
   "midpoint_distance_m": 1663.0,
   "start_elevation_m": 770.7021950389326,
   "end_elevation_m": 771.1982854803468,
   "start_xy": [
    957437.6359233567,
    6338554.028718527
   ],
   "end_xy": [
    957487.175879497,
    6338560.740376933
   ]
  },
  "min_100m": {
   "gradient_pct": 2.437227864871147,
   "start_distance_m": 709.0,
   "end_distance_m": 809.0,
   "midpoint_distance_m": 759.0,
   "start_elevation_m": 705.7402685534942,
   "end_elevation_m": 708.1774964183653,
   "start_xy": [
    957435.619361908,
    6338327.0342643745
   ],
   "end_xy": [
    957343.9288364745,
    6338364.250763991
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 40.852841078219626,
   "start_distance_m": 4384.0,
   "end_distance_m": 4386.0,
   "midpoint_distance_m": 4385.0,
   "start_elevation_m": 1047.7087374493174,
   "end_elevation_m": 1048.5257942708818,
   "start_xy": [
    957493.6758682437,
    6339697.442598011
   ],
   "end_xy": [
    957493.8839802077,
    6339699.431740894
   ]
  },
  "max_3m": {
   "gradient_pct": 36.94530188435768,
   "start_distance_m": 2844.0,
   "end_distance_m": 2847.0,
   "midpoint_distance_m": 2845.5,
   "start_elevation_m": 877.4833747118877,
   "end_elevation_m": 878.5917337684184,
   "start_xy": [
    957794.8833968713,
    6339058.181951745
   ],
   "end_xy": [
    957792.5956016486,
    6339060.122568404
   ]
  }
 },
 "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": {
  "no_bench_suppression": {
   "masked_fraction": 0.019,
   "windows_resited": [
    2.0,
    3.0,
    5.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.29,
   "obstruction_max_height_m": 25.49,
   "flagged_windows_m": [
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    2970.0,
    3000.0
   ],
   [
    4280.0,
    4350.0
   ]
  ],
  "review": [],
  "extent": [
   "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_E957-N6337_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E957-N6338_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E957-N6339_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E957-N6340_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:35:07+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps3",
  "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": [
   "E957-N6337",
   "E957-N6338",
   "E957-N6339",
   "E957-N6340"
  ],
  "elevation_blocks": [
   "21LHD8QO@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_0957_6338_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0957_6339_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0957_6340_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0957_6341_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8QO"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0957_6338_MNT_O_0M50_LAMB93_IGN69": "2025-04-02",
   "LHD_FXX_0957_6339_MNT_O_0M50_LAMB93_IGN69": "2025-04-02",
   "LHD_FXX_0957_6340_MNT_O_0M50_LAMB93_IGN69": "2025-04-02",
   "LHD_FXX_0957_6341_MNT_O_0M50_LAMB93_IGN69": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 9,
  "carriageway": {
   "stations": 221,
   "stations_resolved": 221,
   "width_median_m": 4.5,
   "width_p10_m": 3.0,
   "width_min_m": 0.75,
   "width_max_m": 12.0,
   "bounded_share": 0.457,
   "unbounded_share": 0.543,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.5,
   "window_m": [
    2823.0,
    2848.0
   ],
   "width_at_max25_m": 3.0,
   "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": 221,
    "stations_resolved": 221,
    "width_median_m": 3.75,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.937,
    "unbounded_share": 0.063,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.25,
    "window_m": [
     2823.0,
     2848.0
    ],
    "width_at_max25_m": 1.25,
    "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": "Digne-les-Bains",
  "county": "Alpes-de-Haute-Provence",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}