{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (43.7783, 7.1775)",
 "slug": "discovered-lane-43-7783-7-1775",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 43.49639484114505,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 380.0,
   "end_distance_m": 382.0,
   "start_elevation_m": 355.92005372144007,
   "end_elevation_m": 356.78998161826297,
   "min_gradient_pct": 3.7034256509173247
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.860840065209764,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 379.0,
   "end_distance_m": 382.0,
   "start_elevation_m": 355.6841564163067,
   "end_elevation_m": 356.78998161826297,
   "min_gradient_pct": 4.141219050988336
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 30.280573119093788,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 377.0,
   "end_distance_m": 382.0,
   "start_elevation_m": 355.2759529623083,
   "end_elevation_m": 356.78998161826297,
   "min_gradient_pct": 4.478418876243495
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 28.106887281240915,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 298.0,
   "end_distance_m": 308.0,
   "start_elevation_m": 340.38942157845594,
   "end_elevation_m": 343.20011030658003,
   "min_gradient_pct": 4.861797622859285
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.27365619634304,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 297.0,
   "end_distance_m": 317.0,
   "start_elevation_m": 340.1536660906354,
   "end_elevation_m": 345.408397329904,
   "min_gradient_pct": 5.266823618141814
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.171698031955657,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 297.0,
   "end_distance_m": 322.0,
   "start_elevation_m": 340.1536660906354,
   "end_elevation_m": 346.4465905986243,
   "min_gradient_pct": 5.542314111450196
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.918781281518022,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 294.0,
   "end_distance_m": 344.0,
   "start_elevation_m": 339.6049204043903,
   "end_elevation_m": 350.06431104514934,
   "min_gradient_pct": 6.84436216824156
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.395824058935602,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 295.0,
   "end_distance_m": 395.0,
   "start_elevation_m": 339.7640017359358,
   "end_elevation_m": 359.1598257948714,
   "min_gradient_pct": 9.370117104016344
  }
 ],
 "shape": {
  "ascent_concentration": 0.331,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 276.0,
  "shape_class": "sustained"
 },
 "length_m": 464.0251176388393,
 "start_elevation_m": 302.7544700190398,
 "end_elevation_m": 369.3281133999154,
 "endpoint_gain_m": 66.57364338087564,
 "overall_gradient_pct": 14.346991326596966,
 "accumulated_ascent_m": 66.57364338087564,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 30.280573119093788,
   "start_distance_m": 377.0,
   "end_distance_m": 382.0,
   "midpoint_distance_m": 379.5,
   "start_elevation_m": 355.2759529623083,
   "end_elevation_m": 356.78998161826297,
   "start_xy": [
    1036177.9658754558,
    6306583.188778421
   ],
   "end_xy": [
    1036174.8856363911,
    6306586.101969416
   ]
  },
  "max_10m": {
   "gradient_pct": 28.106887281240915,
   "start_distance_m": 298.0,
   "end_distance_m": 308.0,
   "midpoint_distance_m": 303.0,
   "start_elevation_m": 340.38942157845594,
   "end_elevation_m": 343.20011030658003,
   "start_xy": [
    1036255.2370798519,
    6306597.79319074
   ],
   "end_xy": [
    1036245.7065320704,
    6306594.765211383
   ]
  },
  "max_20m": {
   "gradient_pct": 26.27365619634304,
   "start_distance_m": 297.0,
   "end_distance_m": 317.0,
   "midpoint_distance_m": 307.0,
   "start_elevation_m": 340.1536660906354,
   "end_elevation_m": 345.408397329904,
   "start_xy": [
    1036256.1901346301,
    6306598.095988675
   ],
   "end_xy": [
    1036237.129039067,
    6306592.040029963
   ]
  },
  "max_25m": {
   "gradient_pct": 25.171698031955657,
   "start_distance_m": 297.0,
   "end_distance_m": 322.0,
   "midpoint_distance_m": 309.5,
   "start_elevation_m": 340.1536660906354,
   "end_elevation_m": 346.4465905986243,
   "start_xy": [
    1036256.1901346301,
    6306598.095988675
   ],
   "end_xy": [
    1036232.2221067725,
    6306591.204304072
   ]
  },
  "max_50m": {
   "gradient_pct": 20.918781281518022,
   "start_distance_m": 294.0,
   "end_distance_m": 344.0,
   "midpoint_distance_m": 319.0,
   "start_elevation_m": 339.6049204043903,
   "end_elevation_m": 350.06431104514934,
   "start_xy": [
    1036259.0964870072,
    6306598.359023257
   ],
   "end_xy": [
    1036210.3413469676,
    6306588.916870934
   ]
  },
  "max_100m": {
   "gradient_pct": 19.395824058935602,
   "start_distance_m": 295.0,
   "end_distance_m": 395.0,
   "midpoint_distance_m": 345.0,
   "start_elevation_m": 339.7640017359358,
   "end_elevation_m": 359.1598257948714,
   "start_xy": [
    1036258.1095237434,
    6306598.519968949
   ],
   "end_xy": [
    1036179.5953001251,
    6306597.558183738
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 4.478418876243495,
   "start_distance_m": 180.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 182.5,
   "start_elevation_m": 326.024863839085,
   "end_elevation_m": 326.2487847828972,
   "start_xy": [
    1036271.2802128843,
    6306561.623843432
   ],
   "end_xy": [
    1036266.4316622403,
    6306560.402550408
   ]
  },
  "min_10m": {
   "gradient_pct": 4.861797622859285,
   "start_distance_m": 175.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 180.0,
   "start_elevation_m": 325.76260502061126,
   "end_elevation_m": 326.2487847828972,
   "start_xy": [
    1036276.0832100103,
    6306562.962840857
   ],
   "end_xy": [
    1036266.4316622403,
    6306560.402550408
   ]
  },
  "min_20m": {
   "gradient_pct": 5.266823618141814,
   "start_distance_m": 165.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 175.0,
   "start_elevation_m": 325.1954200592688,
   "end_elevation_m": 326.2487847828972,
   "start_xy": [
    1036284.8981841988,
    6306567.684729257
   ],
   "end_xy": [
    1036266.4316622403,
    6306560.402550408
   ]
  },
  "min_25m": {
   "gradient_pct": 5.542314111450196,
   "start_distance_m": 160.0,
   "end_distance_m": 185.0,
   "midpoint_distance_m": 172.5,
   "start_elevation_m": 324.86320625503464,
   "end_elevation_m": 326.2487847828972,
   "start_xy": [
    1036289.0144206044,
    6306570.502728153
   ],
   "end_xy": [
    1036266.4316622403,
    6306560.402550408
   ]
  },
  "min_50m": {
   "gradient_pct": 6.84436216824156,
   "start_distance_m": 140.0,
   "end_distance_m": 190.0,
   "midpoint_distance_m": 165.0,
   "start_elevation_m": 323.2199401944231,
   "end_elevation_m": 326.64212127854387,
   "start_xy": [
    1036305.0213386071,
    6306582.493498607
   ],
   "end_xy": [
    1036261.5831115963,
    6306559.181257383
   ]
  },
  "min_100m": {
   "gradient_pct": 9.370117104016344,
   "start_distance_m": 111.0,
   "end_distance_m": 211.0,
   "midpoint_distance_m": 161.0,
   "start_elevation_m": 319.748705412978,
   "end_elevation_m": 329.1188225169943,
   "start_xy": [
    1036329.0158204844,
    6306582.161775949
   ],
   "end_xy": [
    1036241.4408288446,
    6306553.278661238
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 43.49639484114505,
   "start_distance_m": 380.0,
   "end_distance_m": 382.0,
   "midpoint_distance_m": 381.0,
   "start_elevation_m": 355.92005372144007,
   "end_elevation_m": 356.78998161826297,
   "start_xy": [
    1036175.6203191482,
    6306584.241797046
   ],
   "end_xy": [
    1036174.8856363911,
    6306586.101969416
   ]
  },
  "max_3m": {
   "gradient_pct": 36.860840065209764,
   "start_distance_m": 379.0,
   "end_distance_m": 382.0,
   "midpoint_distance_m": 380.5,
   "start_elevation_m": 355.6841564163067,
   "end_elevation_m": 356.78998161826297,
   "start_xy": [
    1036175.9876605268,
    6306583.3117108615
   ],
   "end_xy": [
    1036174.8856363911,
    6306586.101969416
   ]
  }
 },
 "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": 0.135,
   "obstruction_max_height_m": 10.92,
   "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_E1036-N6306_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:33:08+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps4",
  "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": [
   "E1036-N6306"
  ],
  "elevation_blocks": [
   "21LHD8SP@2025-06-20"
  ],
  "ign_dalles": [
   "LHD_FXX_1036_6307_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8SP"
  ],
  "ign_editions": [
   "2025-06-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1036_6307_MNT_O_0M50_LAMB93_IGN69": "2025-06-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 25,
   "stations_resolved": 25,
   "width_median_m": 4.25,
   "width_p10_m": 3.5,
   "width_min_m": 3.25,
   "width_max_m": 9.5,
   "bounded_share": 0.52,
   "unbounded_share": 0.48,
   "confidence_median": 0.513,
   "width_median_bounded_m": 4.5,
   "window_m": [
    297.0,
    322.0
   ],
   "width_at_max25_m": 4.0,
   "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": 25,
    "stations_resolved": 25,
    "width_median_m": 3.75,
    "width_p10_m": 1.25,
    "width_min_m": 1.0,
    "width_max_m": 12.0,
    "bounded_share": 0.96,
    "unbounded_share": 0.04,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.75,
    "window_m": [
     297.0,
     322.0
    ],
    "width_at_max25_m": 6.25,
    "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": "Carros",
  "county": "Alpes-Maritimes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}