{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (43.8713, 6.7627)",
 "slug": "discovered-lane-43-8713-6-7627",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 28.070962179629078,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 287.0,
   "end_distance_m": 289.0,
   "start_elevation_m": 1060.0743178826629,
   "end_elevation_m": 1060.6357371262554,
   "min_gradient_pct": -4.182400186209634
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.534832906016465,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 287.0,
   "end_distance_m": 290.0,
   "start_elevation_m": 1060.0743178826629,
   "end_elevation_m": 1060.8703628698433,
   "min_gradient_pct": -2.70264133728233
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.147446621421295,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 284.0,
   "end_distance_m": 289.0,
   "start_elevation_m": 1059.3283647951844,
   "end_elevation_m": 1060.6357371262554,
   "min_gradient_pct": -1.5851958059056415
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.960605916655823,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 286.0,
   "end_distance_m": 296.0,
   "start_elevation_m": 1059.8402172672463,
   "end_elevation_m": 1062.336277858912,
   "min_gradient_pct": -0.833928622125768
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.447089233528686,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 279.0,
   "end_distance_m": 299.0,
   "start_elevation_m": 1058.326210604814,
   "end_elevation_m": 1063.0156284515197,
   "min_gradient_pct": 2.1356042437810174
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.101593049061194,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 275.0,
   "end_distance_m": 300.0,
   "start_elevation_m": 1057.6810186772004,
   "end_elevation_m": 1063.2064169394657,
   "min_gradient_pct": 2.9577958533154742
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.77301548070818,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 249.0,
   "end_distance_m": 299.0,
   "start_elevation_m": 1052.6291207111656,
   "end_elevation_m": 1063.0156284515197,
   "min_gradient_pct": 5.305560020517078
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.903426028298327,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 200.0,
   "end_distance_m": 300.0,
   "start_elevation_m": 1046.3029909111674,
   "end_elevation_m": 1063.2064169394657,
   "min_gradient_pct": 6.389419674825376
  }
 ],
 "shape": {
  "ascent_concentration": 0.45,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 82.0,
  "shape_class": "stepped"
 },
 "length_m": 300.0868698282353,
 "start_elevation_m": 1030.4491784121153,
 "end_elevation_m": 1063.2200888701095,
 "endpoint_gain_m": 32.770910457994205,
 "overall_gradient_pct": 10.920474620149733,
 "accumulated_ascent_m": 32.929573846419544,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.147446621421295,
   "start_distance_m": 284.0,
   "end_distance_m": 289.0,
   "midpoint_distance_m": 286.5,
   "start_elevation_m": 1059.3283647951844,
   "end_elevation_m": 1060.6357371262554,
   "start_xy": [
    1002331.3351667307,
    6315252.361650863
   ],
   "end_xy": [
    1002326.3381825746,
    6315252.188015199
   ]
  },
  "max_10m": {
   "gradient_pct": 24.960605916655823,
   "start_distance_m": 286.0,
   "end_distance_m": 296.0,
   "midpoint_distance_m": 291.0,
   "start_elevation_m": 1059.8402172672463,
   "end_elevation_m": 1062.336277858912,
   "start_xy": [
    1002329.3363730682,
    6315252.292196597
   ],
   "end_xy": [
    1002319.342404756,
    6315251.944925271
   ]
  },
  "max_20m": {
   "gradient_pct": 23.447089233528686,
   "start_distance_m": 279.0,
   "end_distance_m": 299.0,
   "midpoint_distance_m": 289.0,
   "start_elevation_m": 1058.326210604814,
   "end_elevation_m": 1063.0156284515197,
   "start_xy": [
    1002336.2088341418,
    6315251.290138895
   ],
   "end_xy": [
    1002316.3442142623,
    6315251.840743873
   ]
  },
  "max_25m": {
   "gradient_pct": 22.101593049061194,
   "start_distance_m": 275.0,
   "end_distance_m": 300.0,
   "midpoint_distance_m": 287.5,
   "start_elevation_m": 1057.6810186772004,
   "end_elevation_m": 1063.2064169394657,
   "start_xy": [
    1002339.927837642,
    6315249.962640787
   ],
   "end_xy": [
    1002315.3448174311,
    6315251.80601674
   ]
  },
  "max_50m": {
   "gradient_pct": 20.77301548070818,
   "start_distance_m": 249.0,
   "end_distance_m": 299.0,
   "midpoint_distance_m": 274.0,
   "start_elevation_m": 1052.6291207111656,
   "end_elevation_m": 1063.0156284515197,
   "start_xy": [
    1002360.6229772667,
    6315234.405519201
   ],
   "end_xy": [
    1002316.3442142623,
    6315251.840743873
   ]
  },
  "max_100m": {
   "gradient_pct": 16.903426028298327,
   "start_distance_m": 200.0,
   "end_distance_m": 300.0,
   "midpoint_distance_m": 250.0,
   "start_elevation_m": 1046.3029909111674,
   "end_elevation_m": 1063.2064169394657,
   "start_xy": [
    1002354.9468491487,
    6315189.800656041
   ],
   "end_xy": [
    1002315.3448174311,
    6315251.80601674
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.5851958059056415,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 1030.4491784121153,
   "end_elevation_m": 1030.36991862182,
   "start_xy": [
    1002369.119,
    6315133.401
   ],
   "end_xy": [
    1002373.809571106,
    6315135.13263007
   ]
  },
  "min_10m": {
   "gradient_pct": -0.833928622125768,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 1030.4491784121153,
   "end_elevation_m": 1030.3657855499027,
   "start_xy": [
    1002369.119,
    6315133.401
   ],
   "end_xy": [
    1002377.883715223,
    6315137.945789354
   ]
  },
  "min_20m": {
   "gradient_pct": 2.1356042437810174,
   "start_distance_m": 84.0,
   "end_distance_m": 104.0,
   "midpoint_distance_m": 94.0,
   "start_elevation_m": 1037.980545477289,
   "end_elevation_m": 1038.4076663260453,
   "start_xy": [
    1002368.4551666182,
    6315161.159936765
   ],
   "end_xy": [
    1002351.3804036232,
    6315151.583903293
   ]
  },
  "min_25m": {
   "gradient_pct": 2.9577958533154742,
   "start_distance_m": 84.0,
   "end_distance_m": 109.0,
   "midpoint_distance_m": 96.5,
   "start_elevation_m": 1037.980545477289,
   "end_elevation_m": 1038.719994440618,
   "start_xy": [
    1002368.4551666182,
    6315161.159936765
   ],
   "end_xy": [
    1002348.209972253,
    6315147.717591752
   ]
  },
  "min_50m": {
   "gradient_pct": 5.305560020517078,
   "start_distance_m": 63.0,
   "end_distance_m": 113.0,
   "midpoint_distance_m": 88.0,
   "start_elevation_m": 1036.4914260361911,
   "end_elevation_m": 1039.1442060464497,
   "start_xy": [
    1002385.3673690733,
    6315163.717251338
   ],
   "end_xy": [
    1002345.6736271569,
    6315144.62454252
   ]
  },
  "min_100m": {
   "gradient_pct": 6.389419674825376,
   "start_distance_m": 64.0,
   "end_distance_m": 164.0,
   "midpoint_distance_m": 114.0,
   "start_elevation_m": 1036.603265504906,
   "end_elevation_m": 1042.9926851797313,
   "start_xy": [
    1002385.6826157884,
    6315164.5155182
   ],
   "end_xy": [
    1002341.1801770644,
    6315156.536880854
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 28.070962179629078,
   "start_distance_m": 287.0,
   "end_distance_m": 289.0,
   "midpoint_distance_m": 288.0,
   "start_elevation_m": 1060.0743178826629,
   "end_elevation_m": 1060.6357371262554,
   "start_xy": [
    1002328.336976237,
    6315252.257469465
   ],
   "end_xy": [
    1002326.3381825746,
    6315252.188015199
   ]
  },
  "max_3m": {
   "gradient_pct": 26.534832906016465,
   "start_distance_m": 287.0,
   "end_distance_m": 290.0,
   "midpoint_distance_m": 288.5,
   "start_elevation_m": 1060.0743178826629,
   "end_elevation_m": 1060.8703628698433,
   "start_xy": [
    1002328.336976237,
    6315252.257469465
   ],
   "end_xy": [
    1002325.3387857433,
    6315252.153288066
   ]
  }
 },
 "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": 0.033,
   "obstruction_max_height_m": 11.68,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "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_E1002-N6315_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:27:32+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": [
   "E1002-N6315"
  ],
  "elevation_blocks": [
   "21LHD8RP@2025-03-06"
  ],
  "ign_dalles": [
   "LHD_FXX_1002_6316_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8RP"
  ],
  "ign_editions": [
   "2025-03-06"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1002_6316_MNT_O_0M50_LAMB93_IGN69": "2025-03-06"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 17,
   "stations_resolved": 17,
   "width_median_m": 5.0,
   "width_p10_m": 3.75,
   "width_min_m": 3.5,
   "width_max_m": 12.0,
   "bounded_share": 0.353,
   "unbounded_share": 0.647,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.12,
   "window_m": [
    275.0,
    300.0
   ],
   "width_at_max25_m": 8.0,
   "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": 17,
    "stations_resolved": 17,
    "width_median_m": 6.75,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 11.0,
    "bounded_share": 0.706,
    "unbounded_share": 0.294,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.62,
    "window_m": [
     275.0,
     300.0
    ],
    "width_at_max25_m": 7.38,
    "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": "Brian\u00e7onnet",
  "county": "Alpes-Maritimes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}