{
 "ocl_version": "0.1.0",
 "name": "Chemin de la Rigole",
 "slug": "chemin-de-la-rigole",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.95202365785224,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 544.0,
   "end_distance_m": 546.0,
   "start_elevation_m": 284.3926541684259,
   "end_elevation_m": 285.07169464158295,
   "min_gradient_pct": -32.360295198114386,
   "suppressed_max_gradient_pct": 80.2722798167622,
   "suppressed_location_m": [
    600.0,
    602.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 33.45097779044105,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 545.0,
   "end_distance_m": 548.0,
   "start_elevation_m": 284.72074926489904,
   "end_elevation_m": 285.7242785986123,
   "min_gradient_pct": -28.947917771417526,
   "suppressed_max_gradient_pct": 79.64040159980262,
   "suppressed_location_m": [
    600.0,
    603.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.22222961327702,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 543.0,
   "end_distance_m": 548.0,
   "start_elevation_m": 284.1131671179484,
   "end_elevation_m": 285.7242785986123,
   "min_gradient_pct": -24.975534842643583,
   "suppressed_max_gradient_pct": 68.16982286658572,
   "suppressed_location_m": [
    599.0,
    604.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.689920475150757,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 538.0,
   "end_distance_m": 548.0,
   "start_elevation_m": 283.0552865510972,
   "end_elevation_m": 285.7242785986123,
   "min_gradient_pct": -21.999861502442855,
   "suppressed_max_gradient_pct": 50.02314694082543,
   "suppressed_location_m": [
    598.0,
    608.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.48192155193692,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 528.0,
   "end_distance_m": 548.0,
   "start_elevation_m": 281.2278942882249,
   "end_elevation_m": 285.7242785986123,
   "min_gradient_pct": -9.35385719388563,
   "suppressed_max_gradient_pct": 40.213058660073955,
   "suppressed_location_m": [
    598.0,
    618.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.252260120482788,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 523.0,
   "end_distance_m": 548.0,
   "start_elevation_m": 280.4112135684916,
   "end_elevation_m": 285.7242785986123,
   "min_gradient_pct": -5.397552011296966,
   "suppressed_max_gradient_pct": 36.68926801769203,
   "suppressed_location_m": [
    598.0,
    623.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.832525519253295,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 843.0,
   "end_distance_m": 893.0,
   "start_elevation_m": 331.6165877094711,
   "end_elevation_m": 341.53285046909775,
   "min_gradient_pct": 0.6048277507178454,
   "suppressed_max_gradient_pct": 25.21235282634632,
   "suppressed_location_m": [
    574.0,
    624.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.83769161532399,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 797.0,
   "end_distance_m": 897.0,
   "start_elevation_m": 323.3618446600138,
   "end_elevation_m": 342.1995362753378,
   "min_gradient_pct": 2.9728339420984753,
   "suppressed_max_gradient_pct": 20.581648897301307,
   "suppressed_location_m": [
    524.0,
    624.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.327,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 355.0,
  "shape_class": "sustained"
 },
 "length_m": 1004.3171003990388,
 "start_elevation_m": 226.89168291912586,
 "end_elevation_m": 360.0045571596724,
 "endpoint_gain_m": 133.11287424054655,
 "overall_gradient_pct": 13.254068280591625,
 "accumulated_ascent_m": 137.12359380432238,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.22222961327702,
   "start_distance_m": 543.0,
   "end_distance_m": 548.0,
   "midpoint_distance_m": 545.5,
   "start_elevation_m": 284.1131671179484,
   "end_elevation_m": 285.7242785986123,
   "start_xy": [
    879312.065889759,
    6506773.440138155
   ],
   "end_xy": [
    879310.3845897916,
    6506778.095642721
   ]
  },
  "max_10m": {
   "gradient_pct": 26.689920475150757,
   "start_distance_m": 538.0,
   "end_distance_m": 548.0,
   "midpoint_distance_m": 543.0,
   "start_elevation_m": 283.0552865510972,
   "end_elevation_m": 285.7242785986123,
   "start_xy": [
    879313.5605068464,
    6506768.668752637
   ],
   "end_xy": [
    879310.3845897916,
    6506778.095642721
   ]
  },
  "max_20m": {
   "gradient_pct": 22.48192155193692,
   "start_distance_m": 528.0,
   "end_distance_m": 548.0,
   "midpoint_distance_m": 538.0,
   "start_elevation_m": 281.2278942882249,
   "end_elevation_m": 285.7242785986123,
   "start_xy": [
    879316.4275551537,
    6506759.092552399
   ],
   "end_xy": [
    879310.3845897916,
    6506778.095642721
   ]
  },
  "max_25m": {
   "gradient_pct": 21.252260120482788,
   "start_distance_m": 523.0,
   "end_distance_m": 548.0,
   "midpoint_distance_m": 535.5,
   "start_elevation_m": 280.4112135684916,
   "end_elevation_m": 285.7242785986123,
   "start_xy": [
    879317.5701255011,
    6506754.224849347
   ],
   "end_xy": [
    879310.3845897916,
    6506778.095642721
   ]
  },
  "max_50m": {
   "gradient_pct": 19.832525519253295,
   "start_distance_m": 843.0,
   "end_distance_m": 893.0,
   "midpoint_distance_m": 868.0,
   "start_elevation_m": 331.6165877094711,
   "end_elevation_m": 341.53285046909775,
   "start_xy": [
    879539.4735770838,
    6506795.801067457
   ],
   "end_xy": [
    879589.4003425951,
    6506793.119778021
   ]
  },
  "max_100m": {
   "gradient_pct": 18.83769161532399,
   "start_distance_m": 797.0,
   "end_distance_m": 897.0,
   "midpoint_distance_m": 847.0,
   "start_elevation_m": 323.3618446600138,
   "end_elevation_m": 342.1995362753378,
   "start_xy": [
    879493.5573625811,
    6506798.438414051
   ],
   "end_xy": [
    879593.3980275601,
    6506792.98370848
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -24.975534842643583,
   "start_distance_m": 635.0,
   "end_distance_m": 640.0,
   "midpoint_distance_m": 637.5,
   "start_elevation_m": 300.48269329976023,
   "end_elevation_m": 299.23391655762805,
   "start_xy": [
    879336.4149442372,
    6506802.375387815
   ],
   "end_xy": [
    879340.7063989978,
    6506799.809570978
   ]
  },
  "min_10m": {
   "gradient_pct": -21.999861502442855,
   "start_distance_m": 631.0,
   "end_distance_m": 641.0,
   "midpoint_distance_m": 636.0,
   "start_elevation_m": 301.3050360724551,
   "end_elevation_m": 299.1050499222108,
   "start_xy": [
    879332.9817804288,
    6506804.428041284
   ],
   "end_xy": [
    879341.56468995,
    6506799.296407611
   ]
  },
  "min_20m": {
   "gradient_pct": -9.35385719388563,
   "start_distance_m": 624.0,
   "end_distance_m": 644.0,
   "midpoint_distance_m": 634.0,
   "start_elevation_m": 301.1333941496775,
   "end_elevation_m": 299.26262271090036,
   "start_xy": [
    879326.9737437639,
    6506808.020184855
   ],
   "end_xy": [
    879344.1395628063,
    6506797.756917509
   ]
  },
  "min_25m": {
   "gradient_pct": -5.397552011296966,
   "start_distance_m": 624.0,
   "end_distance_m": 649.0,
   "midpoint_distance_m": 636.5,
   "start_elevation_m": 301.1333941496775,
   "end_elevation_m": 299.78400614685324,
   "start_xy": [
    879326.9737437639,
    6506808.020184855
   ],
   "end_xy": [
    879348.4310175669,
    6506795.191100673
   ]
  },
  "min_50m": {
   "gradient_pct": 0.6048277507178454,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 226.89168291912586,
   "end_elevation_m": 227.19409679448478,
   "start_xy": [
    878911.823,
    6506786.137
   ],
   "end_xy": [
    878912.414561968,
    6506741.557416817
   ]
  },
  "min_100m": {
   "gradient_pct": 2.9728339420984753,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 226.89168291912586,
   "end_elevation_m": 229.86451686122433,
   "start_xy": [
    878911.823,
    6506786.137
   ],
   "end_xy": [
    878951.5211647918,
    6506728.755036838
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.95202365785224,
   "start_distance_m": 544.0,
   "end_distance_m": 546.0,
   "midpoint_distance_m": 545.0,
   "start_elevation_m": 284.3926541684259,
   "end_elevation_m": 285.07169464158295,
   "start_xy": [
    879311.7669663415,
    6506774.394415258
   ],
   "end_xy": [
    879311.1691195066,
    6506776.302969466
   ]
  },
  "max_3m": {
   "gradient_pct": 33.45097779044105,
   "start_distance_m": 545.0,
   "end_distance_m": 548.0,
   "midpoint_distance_m": 546.5,
   "start_elevation_m": 284.72074926489904,
   "end_elevation_m": 285.7242785986123,
   "start_xy": [
    879311.4680429241,
    6506775.348692362
   ],
   "end_xy": [
    879310.3845897916,
    6506778.095642721
   ]
  }
 },
 "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": 0.009,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.05,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.063,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 10.0,
     "start_m": 607.0,
     "end_m": 617.0,
     "raw_pct": 31.47,
     "reason": "hump+mask-edge"
    },
    {
     "window_m": 5.0,
     "start_m": 613.0,
     "end_m": 618.0,
     "raw_pct": 35.91,
     "reason": "mask-edge"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.378,
   "obstruction_max_height_m": 25.94,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    598.0,
    660.0
   ]
  ],
  "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_E878-N6506_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E879-N6506_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:13:08+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": [
   "E878-N6506",
   "E879-N6506"
  ],
  "elevation_blocks": [
   "21LHD6OL@2025-02-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0878_6507_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0879_6507_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6OL"
  ],
  "ign_editions": [
   "2025-02-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0878_6507_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0879_6507_MNT_O_0M50_LAMB93_IGN69": "2025-02-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 47,
   "stations_resolved": 47,
   "width_median_m": 4.5,
   "width_p10_m": 2.15,
   "width_min_m": 0.5,
   "width_max_m": 10.25,
   "bounded_share": 0.383,
   "unbounded_share": 0.617,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.12,
   "window_m": [
    523.0,
    548.0
   ],
   "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": 47,
    "stations_resolved": 47,
    "width_median_m": 3.75,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.745,
    "unbounded_share": 0.255,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.5,
    "window_m": [
     523.0,
     548.0
    ],
    "width_at_max25_m": 2.5,
    "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-Savin",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}