{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (45.1813, 5.3322)",
 "slug": "discovered-lane-45-1813-5-3322",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.12851473129672,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 102.0,
   "end_distance_m": 104.0,
   "start_elevation_m": 323.90098698381144,
   "end_elevation_m": 324.50355727843737,
   "min_gradient_pct": -0.6993039404761703
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 29.358146746278635,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 101.0,
   "end_distance_m": 104.0,
   "start_elevation_m": 323.622812876049,
   "end_elevation_m": 324.50355727843737,
   "min_gradient_pct": 1.2457590814847208
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.614693604640706,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 102.0,
   "end_distance_m": 107.0,
   "start_elevation_m": 323.90098698381144,
   "end_elevation_m": 325.33172166404347,
   "min_gradient_pct": 2.9511065033466366
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.194761735020165,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 99.0,
   "end_distance_m": 109.0,
   "start_elevation_m": 323.1247247606774,
   "end_elevation_m": 325.8442009341794,
   "min_gradient_pct": 6.135386213446736
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.946057307906813,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 96.0,
   "end_distance_m": 116.0,
   "start_elevation_m": 322.44989773022183,
   "end_elevation_m": 327.4391091918032,
   "min_gradient_pct": 10.075474743359791
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.995476159959935,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 95.0,
   "end_distance_m": 120.0,
   "start_elevation_m": 322.2559329729093,
   "end_elevation_m": 328.2548020128993,
   "min_gradient_pct": 11.26420247171609
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.288157324876806,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 68.0,
   "end_distance_m": 118.0,
   "start_elevation_m": 317.19249253545973,
   "end_elevation_m": 327.83657119789814,
   "min_gradient_pct": 11.714394512689296
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.545360509413626,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 50.0,
   "end_distance_m": 150.0,
   "start_elevation_m": 314.029128774896,
   "end_elevation_m": 332.5744892843096,
   "min_gradient_pct": 15.227039498169802
  }
 ],
 "shape": {
  "ascent_concentration": 0.327,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 181.0,
  "shape_class": "sustained"
 },
 "length_m": 216.59353559872093,
 "start_elevation_m": 308.17193151855133,
 "end_elevation_m": 343.23888219724074,
 "endpoint_gain_m": 35.06695067868941,
 "overall_gradient_pct": 16.190211116760814,
 "accumulated_ascent_m": 35.08632645693149,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.614693604640706,
   "start_distance_m": 102.0,
   "end_distance_m": 107.0,
   "midpoint_distance_m": 104.5,
   "start_elevation_m": 323.90098698381144,
   "end_elevation_m": 325.33172166404347,
   "start_xy": [
    883159.2657539409,
    6456265.66084462
   ],
   "end_xy": [
    883155.4302378513,
    6456262.4709124025
   ]
  },
  "max_10m": {
   "gradient_pct": 27.194761735020165,
   "start_distance_m": 99.0,
   "end_distance_m": 109.0,
   "midpoint_distance_m": 104.0,
   "start_elevation_m": 323.1247247606774,
   "end_elevation_m": 325.8442009341794,
   "start_xy": [
    883161.7443225635,
    6456267.166239935
   ],
   "end_xy": [
    883154.2247632124,
    6456260.875033054
   ]
  },
  "max_20m": {
   "gradient_pct": 24.946057307906813,
   "start_distance_m": 96.0,
   "end_distance_m": 116.0,
   "midpoint_distance_m": 106.0,
   "start_elevation_m": 322.44989773022183,
   "end_elevation_m": 327.4391091918032,
   "start_xy": [
    883164.743013896,
    6456267.254841806
   ],
   "end_xy": [
    883150.0056019758,
    6456255.289455335
   ]
  },
  "max_25m": {
   "gradient_pct": 23.995476159959935,
   "start_distance_m": 95.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 107.5,
   "start_elevation_m": 322.2559329729093,
   "end_elevation_m": 328.2548020128993,
   "start_xy": [
    883165.7425776736,
    6456267.284375764
   ],
   "end_xy": [
    883147.5946526979,
    6456252.097696638
   ]
  },
  "max_50m": {
   "gradient_pct": 21.288157324876806,
   "start_distance_m": 68.0,
   "end_distance_m": 118.0,
   "midpoint_distance_m": 93.0,
   "start_elevation_m": 317.19249253545973,
   "end_elevation_m": 327.83657119789814,
   "start_xy": [
    883179.8526489863,
    6456246.3300931575
   ],
   "end_xy": [
    883148.8001273369,
    6456253.693575986
   ]
  },
  "max_100m": {
   "gradient_pct": 18.545360509413626,
   "start_distance_m": 50.0,
   "end_distance_m": 150.0,
   "midpoint_distance_m": 100.0,
   "start_elevation_m": 314.029128774896,
   "end_elevation_m": 332.5744892843096,
   "start_xy": [
    883188.6453432082,
    6456231.1652434105
   ],
   "end_xy": [
    883127.2020596851,
    6456230.217727785
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 2.9511065033466366,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 308.17193151855133,
   "end_elevation_m": 308.31948684371866,
   "start_xy": [
    883200.84,
    6456185.546
   ],
   "end_xy": [
    883200.149675009,
    6456190.498115852
   ]
  },
  "min_10m": {
   "gradient_pct": 6.135386213446736,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 308.17193151855133,
   "end_elevation_m": 308.785470139896,
   "start_xy": [
    883200.84,
    6456185.546
   ],
   "end_xy": [
    883199.459350018,
    6456195.450231703
   ]
  },
  "min_20m": {
   "gradient_pct": 10.075474743359791,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 308.17193151855133,
   "end_elevation_m": 310.1870264672233,
   "start_xy": [
    883200.84,
    6456185.546
   ],
   "end_xy": [
    883198.0787000359,
    6456205.354463406
   ]
  },
  "min_25m": {
   "gradient_pct": 11.26420247171609,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 308.17193151855133,
   "end_elevation_m": 310.98798213648035,
   "start_xy": [
    883200.84,
    6456185.546
   ],
   "end_xy": [
    883197.2984617851,
    6456210.28875147
   ]
  },
  "min_50m": {
   "gradient_pct": 11.714394512689296,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 308.17193151855133,
   "end_elevation_m": 314.029128774896,
   "start_xy": [
    883200.84,
    6456185.546
   ],
   "end_xy": [
    883188.6453432082,
    6456231.1652434105
   ]
  },
  "min_100m": {
   "gradient_pct": 15.227039498169802,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 308.17193151855133,
   "end_elevation_m": 323.39897101672113,
   "start_xy": [
    883200.84,
    6456185.546
   ],
   "end_xy": [
    883160.8282453667,
    6456266.909291874
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.12851473129672,
   "start_distance_m": 102.0,
   "end_distance_m": 104.0,
   "midpoint_distance_m": 103.0,
   "start_elevation_m": 323.90098698381144,
   "end_elevation_m": 324.50355727843737,
   "start_xy": [
    883159.2657539409,
    6456265.66084462
   ],
   "end_xy": [
    883157.7032625151,
    6456264.412397367
   ]
  },
  "max_3m": {
   "gradient_pct": 29.358146746278635,
   "start_distance_m": 101.0,
   "end_distance_m": 104.0,
   "midpoint_distance_m": 102.5,
   "start_elevation_m": 323.622812876049,
   "end_elevation_m": 324.50355727843737,
   "start_xy": [
    883160.0469996538,
    6456266.285068247
   ],
   "end_xy": [
    883157.7032625151,
    6456264.412397367
   ]
  }
 },
 "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": 0.023,
   "obstruction_max_height_m": 7.39,
   "flagged_windows_m": [
    2,
    3,
    5
   ]
  },
  "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_E883-N6456_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:14:47+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": [
   "E883-N6456"
  ],
  "elevation_blocks": [
   "21LHD6OM@2024-10-24"
  ],
  "ign_dalles": [
   "LHD_FXX_0883_6457_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6OM"
  ],
  "ign_editions": [
   "2024-10-24"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0883_6457_MNT_O_0M50_LAMB93_IGN69": "2024-10-24"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 14,
   "stations_resolved": 14,
   "width_median_m": 5.12,
   "width_p10_m": 2.9,
   "width_min_m": 1.25,
   "width_max_m": 8.0,
   "bounded_share": 0.357,
   "unbounded_share": 0.643,
   "confidence_median": 0.0,
   "width_median_bounded_m": 6.25,
   "window_m": [
    95.0,
    120.0
   ],
   "width_at_max25_m": 5.25,
   "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": 14,
    "stations_resolved": 14,
    "width_median_m": 5.0,
    "width_p10_m": 1.88,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.929,
    "unbounded_share": 0.071,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.0,
    "window_m": [
     95.0,
     120.0
    ],
    "width_at_max25_m": 5.0,
    "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-V\u00e9rand",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}