{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.4804, 5.0193)",
 "slug": "discovered-lane-44-4804-5-0193",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 45.179733287542945,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 2.0,
   "end_distance_m": 4.0,
   "start_elevation_m": 343.0005950905899,
   "end_elevation_m": 343.90418975634077,
   "min_gradient_pct": -36.77461003402982
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.476783547072728,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1.0,
   "end_distance_m": 4.0,
   "start_elevation_m": 342.9898862499286,
   "end_elevation_m": 343.90418975634077,
   "min_gradient_pct": -25.587182960371518
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.110904487513153,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 523.0,
   "end_distance_m": 528.0,
   "start_elevation_m": 402.8803883481347,
   "end_elevation_m": 404.0359335725104,
   "min_gradient_pct": -13.86917583145646
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.34371716749422,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 816.0,
   "end_distance_m": 826.0,
   "start_elevation_m": 447.0397647959122,
   "end_elevation_m": 449.27413651266164,
   "min_gradient_pct": -2.0700497364987314
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.43093310590416,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 813.0,
   "end_distance_m": 833.0,
   "start_elevation_m": 446.40432684565263,
   "end_elevation_m": 450.69051346683347,
   "min_gradient_pct": 3.347274054517584
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.12576929217562,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 808.0,
   "end_distance_m": 833.0,
   "start_elevation_m": 445.40907114378956,
   "end_elevation_m": 450.69051346683347,
   "min_gradient_pct": 3.657794242593127
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.083200571238535,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 790.0,
   "end_distance_m": 840.0,
   "start_elevation_m": 442.25712179371624,
   "end_elevation_m": 451.7987220793355,
   "min_gradient_pct": 3.6685283116947858
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.690778133249125,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 187.0,
   "end_distance_m": 287.0,
   "start_elevation_m": 357.746078577256,
   "end_elevation_m": 375.43685671050514,
   "min_gradient_pct": 5.875514218150045
  }
 ],
 "shape": {
  "ascent_concentration": 0.31,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 219.0,
  "shape_class": "sustained"
 },
 "length_m": 873.2999999998482,
 "start_elevation_m": 342.985296803234,
 "end_elevation_m": 455.05344709202916,
 "endpoint_gain_m": 112.06815028879515,
 "overall_gradient_pct": 12.832720747602728,
 "accumulated_ascent_m": 113.62385869412009,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.110904487513153,
   "start_distance_m": 523.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 525.5,
   "start_elevation_m": 402.8803883481347,
   "end_elevation_m": 404.0359335725104,
   "start_xy": [
    860509.2007770011,
    6377751.807597951
   ],
   "end_xy": [
    860504.2201201834,
    6377751.368214673
   ]
  },
  "max_10m": {
   "gradient_pct": 22.34371716749422,
   "start_distance_m": 816.0,
   "end_distance_m": 826.0,
   "midpoint_distance_m": 821.0,
   "start_elevation_m": 447.0397647959122,
   "end_elevation_m": 449.27413651266164,
   "start_xy": [
    860235.8640951315,
    6377802.222846431
   ],
   "end_xy": [
    860226.6065014463,
    6377805.904559647
   ]
  },
  "max_20m": {
   "gradient_pct": 21.43093310590416,
   "start_distance_m": 813.0,
   "end_distance_m": 833.0,
   "midpoint_distance_m": 823.0,
   "start_elevation_m": 446.40432684565263,
   "end_elevation_m": 450.69051346683347,
   "start_xy": [
    860238.5223169846,
    6377800.832214711
   ],
   "end_xy": [
    860219.9663871973,
    6377805.930656289
   ]
  },
  "max_25m": {
   "gradient_pct": 21.12576929217562,
   "start_distance_m": 808.0,
   "end_distance_m": 833.0,
   "midpoint_distance_m": 820.5,
   "start_elevation_m": 445.40907114378956,
   "end_elevation_m": 450.69051346683347,
   "start_xy": [
    860242.9526867396,
    6377798.514495178
   ],
   "end_xy": [
    860219.9663871973,
    6377805.930656289
   ]
  },
  "max_50m": {
   "gradient_pct": 19.083200571238535,
   "start_distance_m": 790.0,
   "end_distance_m": 840.0,
   "midpoint_distance_m": 815.0,
   "start_elevation_m": 442.25712179371624,
   "end_elevation_m": 451.7987220793355,
   "start_xy": [
    860256.0174088528,
    6377786.531666913
   ],
   "end_xy": [
    860214.277688473,
    6377802.420178199
   ]
  },
  "max_100m": {
   "gradient_pct": 17.690778133249125,
   "start_distance_m": 187.0,
   "end_distance_m": 287.0,
   "midpoint_distance_m": 237.0,
   "start_elevation_m": 357.746078577256,
   "end_elevation_m": 375.43685671050514,
   "start_xy": [
    860831.6026973117,
    6377712.374122382
   ],
   "end_xy": [
    860739.3488092951,
    6377744.54028168
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -13.86917583145646,
   "start_distance_m": 158.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 160.5,
   "start_elevation_m": 355.4189415299762,
   "end_elevation_m": 354.7254827384034,
   "start_xy": [
    860859.8485520453,
    6377706.226879494
   ],
   "end_xy": [
    860855.1580266318,
    6377707.95863333
   ]
  },
  "min_10m": {
   "gradient_pct": -2.0700497364987314,
   "start_distance_m": 153.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 158.0,
   "start_elevation_m": 354.9324877120533,
   "end_elevation_m": 354.7254827384034,
   "start_xy": [
    860864.5390774589,
    6377704.49512566
   ],
   "end_xy": [
    860855.1580266318,
    6377707.95863333
   ]
  },
  "min_20m": {
   "gradient_pct": 3.347274054517584,
   "start_distance_m": 143.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 153.0,
   "start_elevation_m": 354.0560279274999,
   "end_elevation_m": 354.7254827384034,
   "start_xy": [
    860872.9884826828,
    6377699.842987524
   ],
   "end_xy": [
    860855.1580266318,
    6377707.95863333
   ]
  },
  "min_25m": {
   "gradient_pct": 3.657794242593127,
   "start_distance_m": 113.0,
   "end_distance_m": 138.0,
   "midpoint_distance_m": 125.5,
   "start_elevation_m": 352.891218582556,
   "end_elevation_m": 353.8056671432043,
   "start_xy": [
    860888.1386874049,
    6377674.12274409
   ],
   "end_xy": [
    860875.7906480586,
    6377695.7019889485
   ]
  },
  "min_50m": {
   "gradient_pct": 3.6685283116947858,
   "start_distance_m": 113.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 138.0,
   "start_elevation_m": 352.891218582556,
   "end_elevation_m": 354.7254827384034,
   "start_xy": [
    860888.1386874049,
    6377674.12274409
   ],
   "end_xy": [
    860855.1580266318,
    6377707.95863333
   ]
  },
  "min_100m": {
   "gradient_pct": 5.875514218150045,
   "start_distance_m": 81.0,
   "end_distance_m": 181.0,
   "midpoint_distance_m": 131.0,
   "start_elevation_m": 351.04048648516596,
   "end_elevation_m": 356.916000703316,
   "start_xy": [
    860901.9830105732,
    6377645.540631713
   ],
   "end_xy": [
    860837.5179174045,
    6377711.369049623
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 45.179733287542945,
   "start_distance_m": 2.0,
   "end_distance_m": 4.0,
   "midpoint_distance_m": 3.0,
   "start_elevation_m": 343.0005950905899,
   "end_elevation_m": 343.90418975634077,
   "start_xy": [
    860963.2720423011,
    6377597.039003613
   ],
   "end_xy": [
    860961.4920846024,
    6377597.9510072265
   ]
  },
  "max_3m": {
   "gradient_pct": 30.476783547072728,
   "start_distance_m": 1.0,
   "end_distance_m": 4.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 342.9898862499286,
   "end_elevation_m": 343.90418975634077,
   "start_xy": [
    860964.1620211506,
    6377596.583001807
   ],
   "end_xy": [
    860961.4920846024,
    6377597.9510072265
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.451,
   "obstruction_max_height_m": 14.53,
   "flagged_windows_m": [
    2,
    3,
    100
   ]
  },
  "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_E860-N6377_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:53:26+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps1",
  "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": [
   "E860-N6377"
  ],
  "elevation_blocks": [
   "22LHD6OO@2025-03-14"
  ],
  "ign_dalles": [
   "LHD_FXX_0860_6378_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD6OO"
  ],
  "ign_editions": [
   "2025-03-14"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0860_6378_MNT_O_0M50_LAMB93_IGN69": "2025-03-14"
  },
  "route_cut_m": 873.3,
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 41,
   "stations_resolved": 41,
   "width_median_m": 4.75,
   "width_p10_m": 2.5,
   "width_min_m": 1.5,
   "width_max_m": 12.0,
   "bounded_share": 0.244,
   "unbounded_share": 0.756,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.0,
   "window_m": [
    808.0,
    833.0
   ],
   "width_at_max25_m": 9.5,
   "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": 41,
    "stations_resolved": 41,
    "width_median_m": 2.0,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.927,
    "unbounded_share": 0.073,
    "confidence_median": 1.0,
    "width_median_bounded_m": 1.25,
    "window_m": [
     808.0,
     833.0
    ],
    "width_at_max25_m": 8.25,
    "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": "Roche-Saint-Secret-B\u00e9conne",
  "county": "Dr\u00f4me",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}