{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.7555, 5.9998)",
 "slug": "discovered-lane-44-7555-5-9998",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 44.52645966736668,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 326.0,
   "end_distance_m": 328.0,
   "start_elevation_m": 836.947276386866,
   "end_elevation_m": 837.8378055802133,
   "min_gradient_pct": -45.72914325356692,
   "suppressed_max_gradient_pct": 50.9084644787265,
   "suppressed_location_m": [
    535.0,
    537.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 40.28205212299554,
   "diagnostic": true,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 369.0,
   "end_distance_m": 372.0,
   "start_elevation_m": 844.2395445730796,
   "end_elevation_m": 845.4480061367694,
   "min_gradient_pct": -30.708851989970753,
   "suppressed_max_gradient_pct": 46.66141631458913,
   "suppressed_location_m": [
    535.0,
    538.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 38.54106120842289,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 369.0,
   "end_distance_m": 374.0,
   "start_elevation_m": 844.2395445730796,
   "end_elevation_m": 846.1665976335007,
   "min_gradient_pct": -27.837964395639574,
   "suppressed_max_gradient_pct": 45.85960247509547,
   "suppressed_location_m": [
    535.0,
    540.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 35.73419226928422,
   "diagnostic": false,
   "flags": [
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 368.0,
   "end_distance_m": 378.0,
   "start_elevation_m": 843.8909269822881,
   "end_elevation_m": 847.4643462092165,
   "min_gradient_pct": -18.992248093361468,
   "suppressed_max_gradient_pct": 39.748763339122206,
   "suppressed_location_m": [
    531.0,
    541.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 31.808880096376697,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 361.0,
   "end_distance_m": 381.0,
   "start_elevation_m": 842.0244630922251,
   "end_elevation_m": 848.3862391115005,
   "min_gradient_pct": -14.689333560814362
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 29.29309600488841,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 356.0,
   "end_distance_m": 381.0,
   "start_elevation_m": 841.0629651102784,
   "end_elevation_m": 848.3862391115005,
   "min_gradient_pct": -14.291030730118564
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.12557176608243,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 351.0,
   "end_distance_m": 401.0,
   "start_elevation_m": 840.1863185567677,
   "end_elevation_m": 851.2491044398089,
   "min_gradient_pct": -12.351410316713782
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.0146933767943,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 281.0,
   "end_distance_m": 381.0,
   "start_elevation_m": 829.3715457347062,
   "end_elevation_m": 848.3862391115005,
   "min_gradient_pct": -9.470924265790245
  }
 ],
 "shape": {
  "ascent_concentration": 0.488,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 96.0,
  "shape_class": "stepped"
 },
 "length_m": 1199.6015147867274,
 "start_elevation_m": 835.7528143242257,
 "end_elevation_m": 911.0211549072177,
 "endpoint_gain_m": 75.26834058299198,
 "overall_gradient_pct": 6.274445276636189,
 "accumulated_ascent_m": 99.14221193554567,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 38.54106120842289,
   "start_distance_m": 369.0,
   "end_distance_m": 374.0,
   "midpoint_distance_m": 371.5,
   "start_elevation_m": 844.2395445730796,
   "end_elevation_m": 846.1665976335007,
   "start_xy": [
    937455.1476023062,
    6410816.143785325
   ],
   "end_xy": [
    937460.0909428301,
    6410816.894374737
   ]
  },
  "max_10m": {
   "gradient_pct": 35.73419226928422,
   "start_distance_m": 368.0,
   "end_distance_m": 378.0,
   "midpoint_distance_m": 373.0,
   "start_elevation_m": 843.8909269822881,
   "end_elevation_m": 847.4643462092165,
   "start_xy": [
    937454.2275440744,
    6410815.8013385255
   ],
   "end_xy": [
    937464.0456152492,
    6410817.494846267
   ]
  },
  "max_20m": {
   "gradient_pct": 31.808880096376697,
   "start_distance_m": 361.0,
   "end_distance_m": 381.0,
   "midpoint_distance_m": 371.0,
   "start_elevation_m": 842.0244630922251,
   "end_elevation_m": 848.3862391115005,
   "start_xy": [
    937448.2043488134,
    6410812.234670775
   ],
   "end_xy": [
    937467.0116195634,
    6410817.945199913
   ]
  },
  "max_25m": {
   "gradient_pct": 29.29309600488841,
   "start_distance_m": 356.0,
   "end_distance_m": 381.0,
   "midpoint_distance_m": 368.5,
   "start_elevation_m": 841.0629651102784,
   "end_elevation_m": 848.3862391115005,
   "start_xy": [
    937443.902066484,
    6410809.687050953
   ],
   "end_xy": [
    937467.0116195634,
    6410817.945199913
   ]
  },
  "max_50m": {
   "gradient_pct": 22.12557176608243,
   "start_distance_m": 351.0,
   "end_distance_m": 401.0,
   "midpoint_distance_m": 376.0,
   "start_elevation_m": 840.1863185567677,
   "end_elevation_m": 851.2491044398089,
   "start_xy": [
    937439.5997841546,
    6410807.13943113
   ],
   "end_xy": [
    937486.3806186796,
    6410815.782157074
   ]
  },
  "max_100m": {
   "gradient_pct": 19.0146933767943,
   "start_distance_m": 281.0,
   "end_distance_m": 381.0,
   "midpoint_distance_m": 331.0,
   "start_elevation_m": 829.3715457347062,
   "end_elevation_m": 848.3862391115005,
   "start_xy": [
    937373.1265830295,
    6410787.431131074
   ],
   "end_xy": [
    937467.0116195634,
    6410817.945199913
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -27.837964395639574,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 835.7528143242257,
   "end_elevation_m": 834.3609161044437,
   "start_xy": [
    937513.013,
    6410621.327
   ],
   "end_xy": [
    937510.189802945,
    6410625.45368855
   ]
  },
  "min_10m": {
   "gradient_pct": -18.992248093361468,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 835.7528143242257,
   "end_elevation_m": 833.8535895148896,
   "start_xy": [
    937513.013,
    6410621.327
   ],
   "end_xy": [
    937507.3666058899,
    6410629.580377099
   ]
  },
  "min_20m": {
   "gradient_pct": -14.689333560814362,
   "start_distance_m": 143.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 153.0,
   "start_elevation_m": 823.8625542395514,
   "end_elevation_m": 820.9246875273885,
   "start_xy": [
    937395.7658319914,
    6410679.548213047
   ],
   "end_xy": [
    937377.1762696217,
    6410684.843204549
   ]
  },
  "min_25m": {
   "gradient_pct": -14.291030730118564,
   "start_distance_m": 137.0,
   "end_distance_m": 162.0,
   "midpoint_distance_m": 149.5,
   "start_elevation_m": 824.6221538385428,
   "end_elevation_m": 821.0493961560131,
   "start_xy": [
    937401.7571423247,
    6410679.871014056
   ],
   "end_xy": [
    937378.0628531092,
    6410684.380635939
   ]
  },
  "min_50m": {
   "gradient_pct": -12.351410316713782,
   "start_distance_m": 127.0,
   "end_distance_m": 177.0,
   "midpoint_distance_m": 152.0,
   "start_elevation_m": 825.734348517859,
   "end_elevation_m": 819.5586433595021,
   "start_xy": [
    937411.7426595467,
    6410680.4090157375
   ],
   "end_xy": [
    937370.5186131779,
    6410696.965304024
   ]
  },
  "min_100m": {
   "gradient_pct": -9.470924265790245,
   "start_distance_m": 81.0,
   "end_distance_m": 181.0,
   "midpoint_distance_m": 131.0,
   "start_elevation_m": 828.7440474651906,
   "end_elevation_m": 819.2731231994004,
   "start_xy": [
    937447.0539423986,
    6410653.562133707
   ],
   "end_xy": [
    937369.3056038074,
    6410700.776945175
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 44.52645966736668,
   "start_distance_m": 326.0,
   "end_distance_m": 328.0,
   "midpoint_distance_m": 327.0,
   "start_elevation_m": 836.947276386866,
   "end_elevation_m": 837.8378055802133,
   "start_xy": [
    937417.0709532939,
    6410796.686330525
   ],
   "end_xy": [
    937418.979737456,
    6410797.283442762
   ]
  },
  "max_3m": {
   "gradient_pct": 40.28205212299554,
   "start_distance_m": 369.0,
   "end_distance_m": 372.0,
   "midpoint_distance_m": 370.5,
   "start_elevation_m": 844.2395445730796,
   "end_elevation_m": 845.4480061367694,
   "start_xy": [
    937455.1476023062,
    6410816.143785325
   ],
   "end_xy": [
    937458.1136066206,
    6410816.594138972
   ]
  }
 },
 "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": 0.026,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.038,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 10.0,
     "start_m": 531.0,
     "end_m": 541.0,
     "raw_pct": 39.75,
     "reason": "hump+short-step"
    },
    {
     "window_m": 5.0,
     "start_m": 535.0,
     "end_m": 540.0,
     "raw_pct": 45.86,
     "reason": "hump"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.586,
   "obstruction_max_height_m": 27.48,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    529.0,
    543.0
   ],
   [
    760.0,
    790.0
   ]
  ],
  "review": [],
  "extent": [
   "descends_at_start",
   "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_E937-N6410_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E938-N6410_0m5.tif"
  ],
  "calculated_at": "2026-09-17T03:41:06+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": [
   "E937-N6410",
   "E938-N6410"
  ],
  "elevation_blocks": [
   "21LHD8QN@2025-02-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0937_6411_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0938_6411_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8QN"
  ],
  "ign_editions": [
   "2025-02-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0937_6411_MNT_O_0M50_LAMB93_IGN69": "2025-02-20",
   "LHD_FXX_0938_6411_MNT_O_0M50_LAMB93_IGN69": "2025-02-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 3,
  "carriageway": {
   "stations": 54,
   "stations_resolved": 54,
   "width_median_m": 4.62,
   "width_p10_m": 2.5,
   "width_min_m": 1.0,
   "width_max_m": 12.0,
   "bounded_share": 0.333,
   "unbounded_share": 0.667,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.38,
   "window_m": [
    356.0,
    381.0
   ],
   "width_at_max25_m": 5.0,
   "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": 54,
    "stations_resolved": 54,
    "width_median_m": 2.38,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 10.75,
    "bounded_share": 0.963,
    "unbounded_share": 0.037,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.25,
    "window_m": [
     356.0,
     381.0
    ],
    "width_at_max25_m": 2.75,
    "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": "Aubessagne",
  "county": "Hautes-Alpes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}