{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.0640, 6.2114)",
 "slug": "discovered-lane-44-0640-6-2114",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.130634621509444,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 124.0,
   "end_distance_m": 126.0,
   "start_elevation_m": 666.0459810376601,
   "end_elevation_m": 666.6285937300903,
   "min_gradient_pct": -8.02144413855217
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.512654323788865,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 124.0,
   "end_distance_m": 127.0,
   "start_elevation_m": 666.0459810376601,
   "end_elevation_m": 666.8713606673738,
   "min_gradient_pct": -5.218377999123429
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.812332295587566,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 124.0,
   "end_distance_m": 129.0,
   "start_elevation_m": 666.0459810376601,
   "end_elevation_m": 667.3865976524395,
   "min_gradient_pct": -2.1648942328329213
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.985231412667872,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 123.0,
   "end_distance_m": 133.0,
   "start_elevation_m": 665.8580916242046,
   "end_elevation_m": 668.3566147654714,
   "min_gradient_pct": -1.2031402807429004
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.57949393084516,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 116.0,
   "end_distance_m": 136.0,
   "start_elevation_m": 664.4443761330147,
   "end_elevation_m": 668.9602749191837,
   "min_gradient_pct": 0.2989643053444979
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.76315108252993,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 113.0,
   "end_distance_m": 138.0,
   "start_elevation_m": 663.8569386979511,
   "end_elevation_m": 669.2977264685836,
   "min_gradient_pct": 1.5179105155993966
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.417381490611206,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 113.0,
   "end_distance_m": 163.0,
   "start_elevation_m": 663.8569386979511,
   "end_elevation_m": 673.5656294432567,
   "min_gradient_pct": 5.533357154345595
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.444716325714467,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 90.0,
   "end_distance_m": 190.0,
   "start_elevation_m": 660.3220635705502,
   "end_elevation_m": 677.7667798962647,
   "min_gradient_pct": 8.090999899299277
  }
 ],
 "shape": {
  "ascent_concentration": 0.406,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 144.0,
  "shape_class": "sustained"
 },
 "length_m": 263.8837784580833,
 "start_elevation_m": 653.765197128886,
 "end_elevation_m": 684.4376070073292,
 "endpoint_gain_m": 30.672409878443204,
 "overall_gradient_pct": 11.62345410455587,
 "accumulated_ascent_m": 31.07678018617048,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.812332295587566,
   "start_distance_m": 124.0,
   "end_distance_m": 129.0,
   "midpoint_distance_m": 126.5,
   "start_elevation_m": 666.0459810376601,
   "end_elevation_m": 667.3865976524395,
   "start_xy": [
    957168.9891817827,
    6334711.506711516
   ],
   "end_xy": [
    957173.2067123577,
    6334708.821113659
   ]
  },
  "max_10m": {
   "gradient_pct": 24.985231412667872,
   "start_distance_m": 123.0,
   "end_distance_m": 133.0,
   "midpoint_distance_m": 128.0,
   "start_elevation_m": 665.8580916242046,
   "end_elevation_m": 668.3566147654714,
   "start_xy": [
    957168.1456756677,
    6334712.043831087
   ],
   "end_xy": [
    957176.3485950723,
    6334706.388757095
   ]
  },
  "max_20m": {
   "gradient_pct": 22.57949393084516,
   "start_distance_m": 116.0,
   "end_distance_m": 136.0,
   "midpoint_distance_m": 126.0,
   "start_elevation_m": 664.4443761330147,
   "end_elevation_m": 668.9602749191837,
   "start_xy": [
    957161.5383970357,
    6334714.18750758
   ],
   "end_xy": [
    957178.4302539234,
    6334704.228503307
   ]
  },
  "max_25m": {
   "gradient_pct": 21.76315108252993,
   "start_distance_m": 113.0,
   "end_distance_m": 138.0,
   "midpoint_distance_m": 125.5,
   "start_elevation_m": 663.8569386979511,
   "end_elevation_m": 669.2977264685836,
   "start_xy": [
    957158.849579822,
    6334715.471810328
   ],
   "end_xy": [
    957179.8180264907,
    6334702.788334115
   ]
  },
  "max_50m": {
   "gradient_pct": 19.417381490611206,
   "start_distance_m": 113.0,
   "end_distance_m": 163.0,
   "midpoint_distance_m": 138.0,
   "start_elevation_m": 663.8569386979511,
   "end_elevation_m": 673.5656294432567,
   "start_xy": [
    957158.849579822,
    6334715.471810328
   ],
   "end_xy": [
    957199.1501261967,
    6334687.490583399
   ]
  },
  "max_100m": {
   "gradient_pct": 17.444716325714467,
   "start_distance_m": 90.0,
   "end_distance_m": 190.0,
   "midpoint_distance_m": 140.0,
   "start_elevation_m": 660.3220635705502,
   "end_elevation_m": 677.7667798962647,
   "start_xy": [
    957137.5568142034,
    6334719.959116433
   ],
   "end_xy": [
    957212.9716965439,
    6334668.0258544525
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.1648942328329213,
   "start_distance_m": 258.0,
   "end_distance_m": 263.0,
   "midpoint_distance_m": 260.5,
   "start_elevation_m": 684.5731334054592,
   "end_elevation_m": 684.4648886938176,
   "start_xy": [
    957255.4724092684,
    6334660.334211057
   ],
   "end_xy": [
    957255.884211595,
    6334665.317224085
   ]
  },
  "min_10m": {
   "gradient_pct": -1.2031402807429004,
   "start_distance_m": 253.0,
   "end_distance_m": 263.0,
   "midpoint_distance_m": 258.0,
   "start_elevation_m": 684.5852027218918,
   "end_elevation_m": 684.4648886938176,
   "start_xy": [
    957255.0606069418,
    6334655.351198029
   ],
   "end_xy": [
    957255.884211595,
    6334665.317224085
   ]
  },
  "min_20m": {
   "gradient_pct": 0.2989643053444979,
   "start_distance_m": 243.0,
   "end_distance_m": 263.0,
   "midpoint_distance_m": 253.0,
   "start_elevation_m": 684.4050958327487,
   "end_elevation_m": 684.4648886938176,
   "start_xy": [
    957248.7796545184,
    6334647.932288605
   ],
   "end_xy": [
    957255.884211595,
    6334665.317224085
   ]
  },
  "min_25m": {
   "gradient_pct": 1.5179105155993966,
   "start_distance_m": 238.0,
   "end_distance_m": 263.0,
   "midpoint_distance_m": 250.5,
   "start_elevation_m": 684.0854110649177,
   "end_elevation_m": 684.4648886938176,
   "start_xy": [
    957243.8421935468,
    6334647.4707935
   ],
   "end_xy": [
    957255.884211595,
    6334665.317224085
   ]
  },
  "min_50m": {
   "gradient_pct": 5.533357154345595,
   "start_distance_m": 18.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 43.0,
   "start_elevation_m": 655.2540619492765,
   "end_elevation_m": 658.0207405264493,
   "start_xy": [
    957110.8484329119,
    6334687.154874188
   ],
   "end_xy": [
    957122.3083031334,
    6334735.445140572
   ]
  },
  "min_100m": {
   "gradient_pct": 8.090999899299277,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 653.765197128886,
   "end_elevation_m": 661.8561970281853,
   "start_xy": [
    957095.479,
    6334684.155
   ],
   "end_xy": [
    957146.6565169389,
    6334716.178900762
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.130634621509444,
   "start_distance_m": 124.0,
   "end_distance_m": 126.0,
   "midpoint_distance_m": 125.0,
   "start_elevation_m": 666.0459810376601,
   "end_elevation_m": 666.6285937300903,
   "start_xy": [
    957168.9891817827,
    6334711.506711516
   ],
   "end_xy": [
    957170.6761940127,
    6334710.432472373
   ]
  },
  "max_3m": {
   "gradient_pct": 27.512654323788865,
   "start_distance_m": 124.0,
   "end_distance_m": 127.0,
   "midpoint_distance_m": 125.5,
   "start_elevation_m": 666.0459810376601,
   "end_elevation_m": 666.8713606673738,
   "start_xy": [
    957168.9891817827,
    6334711.506711516
   ],
   "end_xy": [
    957171.5197001278,
    6334709.895352801
   ]
  }
 },
 "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": 0.03,
   "obstruction_max_height_m": 8.27,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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_E957-N6334_0m5.tif"
  ],
  "calculated_at": "2026-09-17T03:49:35+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-alps3",
  "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": [
   "E957-N6334"
  ],
  "elevation_blocks": [
   "21LHD8QO@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_0957_6335_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8QO"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0957_6335_MNT_O_0M50_LAMB93_IGN69": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 17,
   "stations_resolved": 17,
   "width_median_m": 5.5,
   "width_p10_m": 3.15,
   "width_min_m": 2.0,
   "width_max_m": 9.75,
   "bounded_share": 0.235,
   "unbounded_share": 0.765,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.25,
   "window_m": [
    113.0,
    138.0
   ],
   "width_at_max25_m": 5.0,
   "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": 17,
    "stations_resolved": 17,
    "width_median_m": 7.25,
    "width_p10_m": 2.0,
    "width_min_m": 0.5,
    "width_max_m": 9.5,
    "bounded_share": 0.588,
    "unbounded_share": 0.412,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.88,
    "window_m": [
     113.0,
     138.0
    ],
    "width_at_max25_m": 7.75,
    "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": "Digne-les-Bains",
  "county": "Alpes-de-Haute-Provence",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}