{
 "ocl_version": "0.1.0",
 "name": "Chemin des Amandiers",
 "slug": "chemin-des-amandiers",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 31.34071613649212,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 292.0,
   "end_distance_m": 294.0,
   "start_elevation_m": 895.7621893038827,
   "end_elevation_m": 896.3890036266125,
   "min_gradient_pct": -74.17436978545311,
   "suppressed_max_gradient_pct": 50.381755726209576,
   "suppressed_location_m": [
    345.0,
    347.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.138757269955324,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 292.0,
   "end_distance_m": 295.0,
   "start_elevation_m": 895.7621893038827,
   "end_elevation_m": 896.6363520219813,
   "min_gradient_pct": -54.39380946135467,
   "suppressed_max_gradient_pct": 38.86088396312365,
   "suppressed_location_m": [
    369.0,
    372.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.972226721655716,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 382.0,
   "end_distance_m": 387.0,
   "start_elevation_m": 903.0061360596881,
   "end_elevation_m": 904.3047473957708,
   "min_gradient_pct": -35.523810928521016,
   "suppressed_max_gradient_pct": 35.08316680557982,
   "suppressed_location_m": [
    367.0,
    372.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.388705656428783,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 380.0,
   "end_distance_m": 390.0,
   "start_elevation_m": 902.5910770311715,
   "end_elevation_m": 904.9299475968144,
   "min_gradient_pct": -21.46689441713079,
   "suppressed_max_gradient_pct": 33.065239977041756,
   "suppressed_location_m": [
    362.0,
    372.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.599003024480226,
   "diagnostic": false,
   "flags": [
    "texture_excluded"
   ],
   "start_distance_m": 382.0,
   "end_distance_m": 402.0,
   "start_elevation_m": 903.0061360596881,
   "end_elevation_m": 907.3259366645841,
   "min_gradient_pct": -14.081363934620867,
   "suppressed_max_gradient_pct": 31.422959558971684,
   "suppressed_location_m": [
    352.0,
    372.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.41680724618027,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 380.0,
   "end_distance_m": 405.0,
   "start_elevation_m": 902.5910770311715,
   "end_elevation_m": 907.9452788427166,
   "min_gradient_pct": -12.7322769884222,
   "suppressed_max_gradient_pct": 28.875376255484298,
   "suppressed_location_m": [
    346.0,
    371.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 14.432186542848513,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 380.0,
   "end_distance_m": 430.0,
   "start_elevation_m": 902.5910770311715,
   "end_elevation_m": 909.8071703025958,
   "min_gradient_pct": -6.377109740026299,
   "suppressed_max_gradient_pct": 24.93834972872537,
   "suppressed_location_m": [
    346.0,
    396.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.777841419436527,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 62.0,
   "end_distance_m": 162.0,
   "start_elevation_m": 873.2466760322909,
   "end_elevation_m": 886.0245174517274,
   "min_gradient_pct": -2.4294242640678476,
   "suppressed_max_gradient_pct": 17.461220082337604,
   "suppressed_location_m": [
    344.0,
    444.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.301,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 121.0,
  "shape_class": "sustained"
 },
 "length_m": 4253.912382005066,
 "start_elevation_m": 870.8437700634734,
 "end_elevation_m": 1174.894215547029,
 "endpoint_gain_m": 304.0504454835557,
 "overall_gradient_pct": 7.147548378517438,
 "accumulated_ascent_m": 316.39552255086346,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.972226721655716,
   "start_distance_m": 382.0,
   "end_distance_m": 387.0,
   "midpoint_distance_m": 384.5,
   "start_elevation_m": 903.0061360596881,
   "end_elevation_m": 904.3047473957708,
   "start_xy": [
    983569.2916350743,
    6400884.684782398
   ],
   "end_xy": [
    983564.5760263049,
    6400883.207532806
   ]
  },
  "max_10m": {
   "gradient_pct": 23.388705656428783,
   "start_distance_m": 380.0,
   "end_distance_m": 390.0,
   "midpoint_distance_m": 385.0,
   "start_elevation_m": 902.5910770311715,
   "end_elevation_m": 904.9299475968144,
   "start_xy": [
    983571.2779157575,
    6400884.918639295
   ],
   "end_xy": [
    983561.848078585,
    6400881.959213441
   ]
  },
  "max_20m": {
   "gradient_pct": 21.599003024480226,
   "start_distance_m": 382.0,
   "end_distance_m": 402.0,
   "midpoint_distance_m": 392.0,
   "start_elevation_m": 903.0061360596881,
   "end_elevation_m": 907.3259366645841,
   "start_xy": [
    983569.2916350743,
    6400884.684782398
   ],
   "end_xy": [
    983550.7612272687,
    6400877.671451372
   ]
  },
  "max_25m": {
   "gradient_pct": 21.41680724618027,
   "start_distance_m": 380.0,
   "end_distance_m": 405.0,
   "midpoint_distance_m": 392.5,
   "start_elevation_m": 902.5910770311715,
   "end_elevation_m": 907.9452788427166,
   "start_xy": [
    983571.2779157575,
    6400884.918639295
   ],
   "end_xy": [
    983547.7661472365,
    6400877.499708539
   ]
  },
  "max_50m": {
   "gradient_pct": 14.432186542848513,
   "start_distance_m": 380.0,
   "end_distance_m": 430.0,
   "midpoint_distance_m": 405.0,
   "start_elevation_m": 902.5910770311715,
   "end_elevation_m": 909.8071703025958,
   "start_xy": [
    983571.2779157575,
    6400884.918639295
   ],
   "end_xy": [
    983527.1995053353,
    6400864.282149962
   ]
  },
  "max_100m": {
   "gradient_pct": 12.777841419436527,
   "start_distance_m": 62.0,
   "end_distance_m": 162.0,
   "midpoint_distance_m": 112.0,
   "start_elevation_m": 873.2466760322909,
   "end_elevation_m": 886.0245174517274,
   "start_xy": [
    983475.0998036361,
    6400646.03462944
   ],
   "end_xy": [
    983516.2213080608,
    6400732.638774295
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -35.523810928521016,
   "start_distance_m": 4248.0,
   "end_distance_m": 4253.0,
   "midpoint_distance_m": 4250.5,
   "start_elevation_m": 1177.3945457703505,
   "end_elevation_m": 1175.6183552239245,
   "start_xy": [
    983209.0359532873,
    6401880.289699495
   ],
   "end_xy": [
    983211.7954792407,
    6401884.42492209
   ]
  },
  "min_10m": {
   "gradient_pct": -21.46689441713079,
   "start_distance_m": 4243.0,
   "end_distance_m": 4253.0,
   "midpoint_distance_m": 4248.0,
   "start_elevation_m": 1177.7650446656376,
   "end_elevation_m": 1175.6183552239245,
   "start_xy": [
    983207.8322045889,
    6401875.509694213
   ],
   "end_xy": [
    983211.7954792407,
    6401884.42492209
   ]
  },
  "min_20m": {
   "gradient_pct": -14.081363934620867,
   "start_distance_m": 4233.0,
   "end_distance_m": 4253.0,
   "midpoint_distance_m": 4243.0,
   "start_elevation_m": 1178.4346280108487,
   "end_elevation_m": 1175.6183552239245,
   "start_xy": [
    983210.1461448865,
    6401865.877344767
   ],
   "end_xy": [
    983211.7954792407,
    6401884.42492209
   ]
  },
  "min_25m": {
   "gradient_pct": -12.7322769884222,
   "start_distance_m": 4228.0,
   "end_distance_m": 4253.0,
   "midpoint_distance_m": 4240.5,
   "start_elevation_m": 1178.80142447103,
   "end_elevation_m": 1175.6183552239245,
   "start_xy": [
    983211.7911743387,
    6401861.155705422
   ],
   "end_xy": [
    983211.7954792407,
    6401884.42492209
   ]
  },
  "min_50m": {
   "gradient_pct": -6.377109740026299,
   "start_distance_m": 295.0,
   "end_distance_m": 345.0,
   "midpoint_distance_m": 320.0,
   "start_elevation_m": 896.6363520219813,
   "end_elevation_m": 893.4477971519682,
   "start_xy": [
    983585.7323869773,
    6400842.734867028
   ],
   "end_xy": [
    983605.9135986008,
    6400886.840982652
   ]
  },
  "min_100m": {
   "gradient_pct": -2.4294242640678476,
   "start_distance_m": 4153.0,
   "end_distance_m": 4253.0,
   "midpoint_distance_m": 4203.0,
   "start_elevation_m": 1178.0477794879923,
   "end_elevation_m": 1175.6183552239245,
   "start_xy": [
    983172.072764026,
    6401799.746849861
   ],
   "end_xy": [
    983211.7954792407,
    6401884.42492209
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 31.34071613649212,
   "start_distance_m": 292.0,
   "end_distance_m": 294.0,
   "midpoint_distance_m": 293.0,
   "start_elevation_m": 895.7621893038827,
   "end_elevation_m": 896.3890036266125,
   "start_xy": [
    983584.3909928603,
    6400840.051503565
   ],
   "end_xy": [
    983585.2872436583,
    6400841.839444981
   ]
  },
  "max_3m": {
   "gradient_pct": 29.138757269955324,
   "start_distance_m": 292.0,
   "end_distance_m": 295.0,
   "midpoint_distance_m": 293.5,
   "start_elevation_m": 895.7621893038827,
   "end_elevation_m": 896.6363520219813,
   "start_xy": [
    983584.3909928603,
    6400840.051503565
   ],
   "end_xy": [
    983585.7323869773,
    6400842.734867028
   ]
  }
 },
 "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": 0.003,
   "windows_resited": [
    2.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.01,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 25.0,
     "start_m": 352.0,
     "end_m": 377.0,
     "raw_pct": 28.06,
     "reason": "hump+mask-edge"
    },
    {
     "window_m": 20.0,
     "start_m": 352.0,
     "end_m": 372.0,
     "raw_pct": 31.42,
     "reason": "hump+mask-edge"
    },
    {
     "window_m": 10.0,
     "start_m": 362.0,
     "end_m": 372.0,
     "raw_pct": 33.07,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.07,
   "obstruction_max_height_m": 23.4,
   "flagged_windows_m": [
    2,
    3
   ]
  },
  "excluded_ranges_m": [
   [
    344.0,
    379.0
   ],
   [
    4249.0,
    4253.0
   ]
  ],
  "review": [],
  "extent": [
   "descends_at_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_E982-N6400_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E982-N6401_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E983-N6400_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E983-N6401_0m5.tif"
  ],
  "calculated_at": "2026-09-17T01:57:57+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps4",
  "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": [
   "E982-N6400",
   "E982-N6401",
   "E983-N6400",
   "E983-N6401"
  ],
  "elevation_blocks": [
   "21LHD8QN@2025-02-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0982_6401_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0982_6402_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0983_6401_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0983_6402_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8QN"
  ],
  "ign_editions": [
   "2025-02-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0982_6401_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0982_6402_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0983_6401_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0983_6402_MNT_O_0M50_LAMB93_IGN69": "2025-02-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 176,
   "stations_resolved": 176,
   "width_median_m": 4.75,
   "width_p10_m": 3.75,
   "width_min_m": 0.5,
   "width_max_m": 12.0,
   "bounded_share": 0.614,
   "unbounded_share": 0.386,
   "confidence_median": 0.662,
   "width_median_bounded_m": 4.5,
   "window_m": [
    380.0,
    405.0
   ],
   "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": 176,
    "stations_resolved": 176,
    "width_median_m": 6.0,
    "width_p10_m": 2.12,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.847,
    "unbounded_share": 0.153,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.5,
    "window_m": [
     380.0,
     405.0
    ],
    "width_at_max25_m": 4.12,
    "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": "Saint-Cl\u00e9ment-sur-Durance",
  "county": "Hautes-Alpes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}