{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.4037, 5.2668)",
 "slug": "discovered-lane-44-4037-5-2668",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 46.57948255287465,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2316.0,
   "end_distance_m": 2318.0,
   "start_elevation_m": 689.3699047141404,
   "end_elevation_m": 690.3014943651979,
   "min_gradient_pct": -37.93986138606442,
   "suppressed_max_gradient_pct": 56.658078664833056,
   "suppressed_location_m": [
    1493.0,
    1495.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.53304558697997,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2315.0,
   "end_distance_m": 2318.0,
   "start_elevation_m": 689.2355029975885,
   "end_elevation_m": 690.3014943651979,
   "min_gradient_pct": -30.313804273707017,
   "suppressed_max_gradient_pct": 45.37975356693854,
   "suppressed_location_m": [
    1493.0,
    1496.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.53667927848801,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2865.0,
   "end_distance_m": 2870.0,
   "start_elevation_m": 730.5430105975615,
   "end_elevation_m": 732.1198445614859,
   "min_gradient_pct": -19.474055539767505,
   "suppressed_max_gradient_pct": 35.900841374755146,
   "suppressed_location_m": [
    1491.0,
    1496.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.515890689039225,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 2861.0,
   "end_distance_m": 2871.0,
   "start_elevation_m": 729.8746583756081,
   "end_elevation_m": 732.426247444512,
   "min_gradient_pct": -10.704633312277565,
   "suppressed_max_gradient_pct": 29.426823406428184,
   "suppressed_location_m": [
    1487.0,
    1497.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.8429242112868,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 1711.0,
   "end_distance_m": 1731.0,
   "start_elevation_m": 619.2968515945566,
   "end_elevation_m": 623.465436436814,
   "min_gradient_pct": -7.005697709224137,
   "suppressed_max_gradient_pct": 24.35942067839278,
   "suppressed_location_m": [
    1479.0,
    1499.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.701249123424986,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 1347.0,
   "end_distance_m": 1372.0,
   "start_elevation_m": 571.9263943470613,
   "end_elevation_m": 577.1017066279176,
   "min_gradient_pct": -6.789978442825031,
   "suppressed_max_gradient_pct": 22.995057239151265,
   "suppressed_location_m": [
    1474.0,
    1499.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.73192461745407,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1344.0,
   "end_distance_m": 1394.0,
   "start_elevation_m": 571.4458713844343,
   "end_elevation_m": 581.3118336931614,
   "min_gradient_pct": -6.123162124378041
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.683713865108075,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1327.0,
   "end_distance_m": 1427.0,
   "start_elevation_m": 568.8440317674417,
   "end_elevation_m": 587.5277456325498,
   "min_gradient_pct": -1.9260963877695758
  }
 ],
 "shape": {
  "ascent_concentration": 0.326,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 264.0,
  "shape_class": "sustained"
 },
 "length_m": 2988.346116186783,
 "start_elevation_m": 460.9827267748984,
 "end_elevation_m": 739.5888283950356,
 "endpoint_gain_m": 278.6061016201372,
 "overall_gradient_pct": 9.323086777365894,
 "accumulated_ascent_m": 294.1091127896511,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.53667927848801,
   "start_distance_m": 2865.0,
   "end_distance_m": 2870.0,
   "midpoint_distance_m": 2867.5,
   "start_elevation_m": 730.5430105975615,
   "end_elevation_m": 732.1198445614859,
   "start_xy": [
    880843.3502335094,
    6369473.067494141
   ],
   "end_xy": [
    880847.9658172759,
    6369471.144895251
   ]
  },
  "max_10m": {
   "gradient_pct": 25.515890689039225,
   "start_distance_m": 2861.0,
   "end_distance_m": 2871.0,
   "midpoint_distance_m": 2866.0,
   "start_elevation_m": 729.8746583756081,
   "end_elevation_m": 732.426247444512,
   "start_xy": [
    880839.6577664963,
    6369474.605573254
   ],
   "end_xy": [
    880848.8889340293,
    6369470.760375473
   ]
  },
  "max_20m": {
   "gradient_pct": 20.8429242112868,
   "start_distance_m": 1711.0,
   "end_distance_m": 1731.0,
   "midpoint_distance_m": 1721.0,
   "start_elevation_m": 619.2968515945566,
   "end_elevation_m": 623.465436436814,
   "start_xy": [
    880377.8393940744,
    6369608.463845781
   ],
   "end_xy": [
    880383.0164690987,
    6369589.307961447
   ]
  },
  "max_25m": {
   "gradient_pct": 20.701249123424986,
   "start_distance_m": 1347.0,
   "end_distance_m": 1372.0,
   "midpoint_distance_m": 1359.5,
   "start_elevation_m": 571.9263943470613,
   "end_elevation_m": 577.1017066279176,
   "start_xy": [
    880502.8742528952,
    6369779.1658669505
   ],
   "end_xy": [
    880527.8639545862,
    6369779.883369141
   ]
  },
  "max_50m": {
   "gradient_pct": 19.73192461745407,
   "start_distance_m": 1344.0,
   "end_distance_m": 1394.0,
   "midpoint_distance_m": 1369.0,
   "start_elevation_m": 571.4458713844343,
   "end_elevation_m": 581.3118336931614,
   "start_xy": [
    880499.8754886923,
    6369779.079766688
   ],
   "end_xy": [
    880549.1892911894,
    6369774.999104996
   ]
  },
  "max_100m": {
   "gradient_pct": 18.683713865108075,
   "start_distance_m": 1327.0,
   "end_distance_m": 1427.0,
   "midpoint_distance_m": 1377.0,
   "start_elevation_m": 568.8440317674417,
   "end_elevation_m": 587.5277456325498,
   "start_xy": [
    880483.564908299,
    6369774.647625825
   ],
   "end_xy": [
    880581.4112446789,
    6369768.1334457975
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -19.474055539767505,
   "start_distance_m": 2624.0,
   "end_distance_m": 2629.0,
   "midpoint_distance_m": 2626.5,
   "start_elevation_m": 714.4149041362263,
   "end_elevation_m": 713.4412013592379,
   "start_xy": [
    880747.3568765845,
    6369401.090560631
   ],
   "end_xy": [
    880747.3170757769,
    6369405.442885528
   ]
  },
  "min_10m": {
   "gradient_pct": -10.704633312277565,
   "start_distance_m": 2663.0,
   "end_distance_m": 2673.0,
   "midpoint_distance_m": 2668.0,
   "start_elevation_m": 714.7547102817047,
   "end_elevation_m": 713.6842469504769,
   "start_xy": [
    880725.4814348295,
    6369429.01479434
   ],
   "end_xy": [
    880717.4414184566,
    6369434.961065165
   ]
  },
  "min_20m": {
   "gradient_pct": -7.005697709224137,
   "start_distance_m": 730.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 740.0,
   "start_elevation_m": 531.7868520673053,
   "end_elevation_m": 530.3857125254605,
   "start_xy": [
    880611.1263376765,
    6369971.0335263135
   ],
   "end_xy": [
    880610.3341332012,
    6369951.049222171
   ]
  },
  "min_25m": {
   "gradient_pct": -6.789978442825031,
   "start_distance_m": 730.0,
   "end_distance_m": 755.0,
   "midpoint_distance_m": 742.5,
   "start_elevation_m": 531.7868520673053,
   "end_elevation_m": 530.089357456599,
   "start_xy": [
    880611.1263376765,
    6369971.0335263135
   ],
   "end_xy": [
    880610.1360820824,
    6369946.053146135
   ]
  },
  "min_50m": {
   "gradient_pct": -6.123162124378041,
   "start_distance_m": 708.0,
   "end_distance_m": 758.0,
   "midpoint_distance_m": 733.0,
   "start_elevation_m": 533.026854918486,
   "end_elevation_m": 529.965273856297,
   "start_xy": [
    880611.9977625995,
    6369993.016260871
   ],
   "end_xy": [
    880610.0172514111,
    6369943.055500514
   ]
  },
  "min_100m": {
   "gradient_pct": -1.9260963877695758,
   "start_distance_m": 684.0,
   "end_distance_m": 784.0,
   "midpoint_distance_m": 734.0,
   "start_elevation_m": 532.4269206305839,
   "end_elevation_m": 530.5008242428144,
   "start_xy": [
    880618.3791974767,
    6370015.717932631
   ],
   "end_xy": [
    880608.5354504072,
    6369917.12726317
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 46.57948255287465,
   "start_distance_m": 2316.0,
   "end_distance_m": 2318.0,
   "midpoint_distance_m": 2317.0,
   "start_elevation_m": 689.3699047141404,
   "end_elevation_m": 690.3014943651979,
   "start_xy": [
    880527.310401182,
    6369225.52591969
   ],
   "end_xy": [
    880527.6517452985,
    6369227.496575467
   ]
  },
  "max_3m": {
   "gradient_pct": 35.53304558697997,
   "start_distance_m": 2315.0,
   "end_distance_m": 2318.0,
   "midpoint_distance_m": 2316.5,
   "start_elevation_m": 689.2355029975885,
   "end_elevation_m": 690.3014943651979,
   "start_xy": [
    880527.1397291238,
    6369224.540591801
   ],
   "end_xy": [
    880527.6517452985,
    6369227.496575467
   ]
  }
 },
 "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": 0.004,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.188,
   "obstruction_max_height_m": 15.72,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    539.0,
    544.0
   ],
   [
    1492.0,
    1497.0
   ]
  ],
  "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_E880-N6369_0m5.tif",
   "data/cache/fr/ign-lidarhd_dtm_E880-N6370_0m5.tif"
  ],
  "calculated_at": "2026-09-17T04:15:01+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": [
   "E880-N6369",
   "E880-N6370"
  ],
  "elevation_blocks": [
   "22LHD6OO@2025-03-14"
  ],
  "ign_dalles": [
   "LHD_FXX_0880_6370_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0880_6371_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD6OO"
  ],
  "ign_editions": [
   "2025-03-14"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0880_6370_MNT_O_0M50_LAMB93_IGN69": "2025-03-14",
   "LHD_FXX_0880_6371_MNT_O_0M50_LAMB93_IGN69": "2025-03-14"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 126,
   "stations_resolved": 126,
   "width_median_m": 3.5,
   "width_p10_m": 1.25,
   "width_min_m": 1.0,
   "width_max_m": 10.0,
   "bounded_share": 0.587,
   "unbounded_share": 0.413,
   "confidence_median": 0.627,
   "width_median_bounded_m": 3.5,
   "window_m": [
    1347.0,
    1372.0
   ],
   "width_at_max25_m": 3.75,
   "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": 126,
    "stations_resolved": 126,
    "width_median_m": 3.5,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 10.75,
    "bounded_share": 0.944,
    "unbounded_share": 0.056,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.0,
    "window_m": [
     1347.0,
     1372.0
    ],
    "width_at_max25_m": 1.5,
    "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": "Sahune",
  "county": "Dr\u00f4me",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}