{
 "ocl_version": "0.1.0",
 "name": "Chemin de Charri\u00e8re",
 "slug": "chemin-de-charriere",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.83731881352924,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 730.0,
   "end_distance_m": 732.0,
   "start_elevation_m": 497.299638216629,
   "end_elevation_m": 498.19638459289956,
   "min_gradient_pct": -40.442194363100725,
   "suppressed_max_gradient_pct": 64.60658726441011,
   "suppressed_location_m": [
    716.0,
    718.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 41.42931951384791,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 733.0,
   "end_distance_m": 736.0,
   "start_elevation_m": 498.26637630770153,
   "end_elevation_m": 499.509255893117,
   "min_gradient_pct": -34.65370823969541,
   "suppressed_max_gradient_pct": 56.4697953062705,
   "suppressed_location_m": [
    715.0,
    718.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 35.76463885705721,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 730.0,
   "end_distance_m": 735.0,
   "start_elevation_m": 497.299638216629,
   "end_elevation_m": 499.08787015948184,
   "min_gradient_pct": -32.9641269377089,
   "suppressed_max_gradient_pct": 49.166829395521745,
   "suppressed_location_m": [
    713.0,
    718.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.314934686526954,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "no_bench_excluded",
    "texture_excluded"
   ],
   "start_distance_m": 727.0,
   "end_distance_m": 737.0,
   "start_elevation_m": 496.94775998197656,
   "end_elevation_m": 499.77925345062926,
   "min_gradient_pct": -22.09519646851504,
   "suppressed_max_gradient_pct": 46.19594633401789,
   "suppressed_location_m": [
    708.0,
    718.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.227778812040015,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1749.0,
   "end_distance_m": 1769.0,
   "start_elevation_m": 606.5119817380112,
   "end_elevation_m": 611.7575375004192,
   "min_gradient_pct": -10.496453156488883,
   "suppressed_max_gradient_pct": 35.03399094525719,
   "suppressed_location_m": [
    706.0,
    726.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.83549167430374,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1748.0,
   "end_distance_m": 1773.0,
   "start_elevation_m": 606.2812658612266,
   "end_elevation_m": 612.7401387798026,
   "min_gradient_pct": -7.657951883799797,
   "suppressed_max_gradient_pct": 31.865996590844134,
   "suppressed_location_m": [
    707.0,
    732.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 25.157472603919132,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1747.0,
   "end_distance_m": 1797.0,
   "start_elevation_m": 606.0390535624477,
   "end_elevation_m": 618.6177898644073,
   "min_gradient_pct": -5.225633917030564
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.39521925417023,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1736.0,
   "end_distance_m": 1836.0,
   "start_elevation_m": 603.7690099832803,
   "end_elevation_m": 626.1642292374505,
   "min_gradient_pct": -1.5552952904832296
  }
 ],
 "shape": {
  "ascent_concentration": 0.347,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 223.0,
  "shape_class": "sustained"
 },
 "length_m": 1910.4549164819177,
 "start_elevation_m": 446.05684758105264,
 "end_elevation_m": 635.8569340820327,
 "endpoint_gain_m": 189.80008650098006,
 "overall_gradient_pct": 9.934811068480741,
 "accumulated_ascent_m": 199.44864271472915,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 35.76463885705721,
   "start_distance_m": 730.0,
   "end_distance_m": 735.0,
   "midpoint_distance_m": 732.5,
   "start_elevation_m": 497.299638216629,
   "end_elevation_m": 499.08787015948184,
   "start_xy": [
    924981.901355808,
    6460779.550233448
   ],
   "end_xy": [
    924986.1200638523,
    6460782.233981282
   ]
  },
  "max_10m": {
   "gradient_pct": 28.314934686526954,
   "start_distance_m": 727.0,
   "end_distance_m": 737.0,
   "midpoint_distance_m": 732.0,
   "start_elevation_m": 496.94775998197656,
   "end_elevation_m": 499.77925345062926,
   "start_xy": [
    924979.3701309816,
    6460777.939984747
   ],
   "end_xy": [
    924987.80754707,
    6460783.307480415
   ]
  },
  "max_20m": {
   "gradient_pct": 26.227778812040015,
   "start_distance_m": 1749.0,
   "end_distance_m": 1769.0,
   "midpoint_distance_m": 1759.0,
   "start_elevation_m": 606.5119817380112,
   "end_elevation_m": 611.7575375004192,
   "start_xy": [
    925607.3496218112,
    6460421.853791289
   ],
   "end_xy": [
    925626.2931469355,
    6460415.441945585
   ]
  },
  "max_25m": {
   "gradient_pct": 25.83549167430374,
   "start_distance_m": 1748.0,
   "end_distance_m": 1773.0,
   "midpoint_distance_m": 1760.5,
   "start_elevation_m": 606.2812658612266,
   "end_elevation_m": 612.7401387798026,
   "start_xy": [
    925606.404603071,
    6460422.180807468
   ],
   "end_xy": [
    925630.0064868528,
    6460413.954966548
   ]
  },
  "max_50m": {
   "gradient_pct": 25.157472603919132,
   "start_distance_m": 1747.0,
   "end_distance_m": 1797.0,
   "midpoint_distance_m": 1772.0,
   "start_elevation_m": 606.0390535624477,
   "end_elevation_m": 618.6177898644073,
   "start_xy": [
    925605.4595843308,
    6460422.507823645
   ],
   "end_xy": [
    925652.04560712,
    6460404.537885343
   ]
  },
  "max_100m": {
   "gradient_pct": 22.39521925417023,
   "start_distance_m": 1736.0,
   "end_distance_m": 1836.0,
   "midpoint_distance_m": 1786.0,
   "start_elevation_m": 603.7690099832803,
   "end_elevation_m": 626.1642292374505,
   "start_xy": [
    925595.130082522,
    6460426.286842958
   ],
   "end_xy": [
    925690.568290521,
    6460401.352778614
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -32.9641269377089,
   "start_distance_m": 249.0,
   "end_distance_m": 254.0,
   "midpoint_distance_m": 251.5,
   "start_elevation_m": 459.60668180462267,
   "end_elevation_m": 457.9584754577372,
   "start_xy": [
    925280.3125526368,
    6461073.657679527
   ],
   "end_xy": [
    925276.1079884749,
    6461070.951826573
   ]
  },
  "min_10m": {
   "gradient_pct": -22.09519646851504,
   "start_distance_m": 245.0,
   "end_distance_m": 255.0,
   "midpoint_distance_m": 250.0,
   "start_elevation_m": 460.0976393820081,
   "end_elevation_m": 457.8881197351566,
   "start_xy": [
    925283.680669587,
    6461075.815322543
   ],
   "end_xy": [
    925275.4304367224,
    6461070.28514835
   ]
  },
  "min_20m": {
   "gradient_pct": -10.496453156488883,
   "start_distance_m": 235.0,
   "end_distance_m": 255.0,
   "midpoint_distance_m": 245.0,
   "start_elevation_m": 459.98741036645436,
   "end_elevation_m": 457.8881197351566,
   "start_xy": [
    925292.516022142,
    6461080.264340327
   ],
   "end_xy": [
    925275.4304367224,
    6461070.28514835
   ]
  },
  "min_25m": {
   "gradient_pct": -7.657951883799797,
   "start_distance_m": 230.0,
   "end_distance_m": 255.0,
   "midpoint_distance_m": 242.5,
   "start_elevation_m": 459.8026077061065,
   "end_elevation_m": 457.8881197351566,
   "start_xy": [
    925297.3808044377,
    6461081.419283276
   ],
   "end_xy": [
    925275.4304367224,
    6461070.28514835
   ]
  },
  "min_50m": {
   "gradient_pct": -5.225633917030564,
   "start_distance_m": 105.0,
   "end_distance_m": 155.0,
   "midpoint_distance_m": 130.0,
   "start_elevation_m": 460.41627738269347,
   "end_elevation_m": 457.8034604241782,
   "start_xy": [
    925361.7518757588,
    6461123.542984878
   ],
   "end_xy": [
    925371.6567378367,
    6461083.5601287065
   ]
  },
  "min_100m": {
   "gradient_pct": -1.5552952904832296,
   "start_distance_m": 104.0,
   "end_distance_m": 204.0,
   "midpoint_distance_m": 154.0,
   "start_elevation_m": 460.4246788618765,
   "end_elevation_m": 458.86938357139326,
   "start_xy": [
    925361.0613461005,
    6461124.266288957
   ],
   "end_xy": [
    925322.9756924777,
    6461085.911503042
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.83731881352924,
   "start_distance_m": 730.0,
   "end_distance_m": 732.0,
   "midpoint_distance_m": 731.0,
   "start_elevation_m": 497.299638216629,
   "end_elevation_m": 498.19638459289956,
   "start_xy": [
    924981.901355808,
    6460779.550233448
   ],
   "end_xy": [
    924983.5888390257,
    6460780.623732582
   ]
  },
  "max_3m": {
   "gradient_pct": 41.42931951384791,
   "start_distance_m": 733.0,
   "end_distance_m": 736.0,
   "midpoint_distance_m": 734.5,
   "start_elevation_m": 498.26637630770153,
   "end_elevation_m": 499.509255893117,
   "start_xy": [
    924984.4325806346,
    6460781.160482149
   ],
   "end_xy": [
    924986.9638054612,
    6460782.770730848
   ]
  }
 },
 "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": 0.013,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.046,
   "windows_resited": [
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.052,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 10.0,
     "start_m": 703.0,
     "end_m": 713.0,
     "raw_pct": 28.91,
     "reason": "mask-edge"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.445,
   "obstruction_max_height_m": 30.06,
   "flagged_windows_m": [
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    30.0,
    35.0
   ],
   [
    240.0,
    270.0
   ],
   [
    428.0,
    433.0
   ],
   [
    449.0,
    454.0
   ],
   [
    660.0,
    690.0
   ],
   [
    701.0,
    720.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier",
   "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_E924-N6460_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E924-N6461_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E925-N6460_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E925-N6461_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:58:22+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": [
   "E924-N6460",
   "E924-N6461",
   "E925-N6460",
   "E925-N6461"
  ],
  "elevation_blocks": [
   "21LHD6PM@2025-03-25"
  ],
  "ign_dalles": [
   "LHD_FXX_0924_6461_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0924_6462_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0925_6461_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0925_6462_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6PM"
  ],
  "ign_editions": [
   "2025-03-25"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0924_6461_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0924_6462_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0925_6461_MNT_O_0M50_LAMB93_IGN69": "2025-03-25",
   "LHD_FXX_0925_6462_MNT_O_0M50_LAMB93_IGN69": "2025-03-25"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 7,
  "carriageway": {
   "stations": 83,
   "stations_resolved": 83,
   "width_median_m": 4.5,
   "width_p10_m": 2.5,
   "width_min_m": 1.0,
   "width_max_m": 9.75,
   "bounded_share": 0.446,
   "unbounded_share": 0.554,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.75,
   "window_m": [
    1748.0,
    1773.0
   ],
   "width_at_max25_m": 2.5,
   "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": 83,
    "stations_resolved": 83,
    "width_median_m": 2.5,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 10.25,
    "bounded_share": 0.94,
    "unbounded_share": 0.06,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.25,
    "window_m": [
     1748.0,
     1773.0
    ],
    "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": "Saint-Jean-le-Vieux",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}