{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (45.1798, 5.8858)",
 "slug": "discovered-lane-45-1798-5-8858",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.074829825422285,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 149.0,
   "end_distance_m": 151.0,
   "start_elevation_m": 771.808499706073,
   "end_elevation_m": 772.3099963025815,
   "min_gradient_pct": -0.5566173674424135
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.158476021178405,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 149.0,
   "end_distance_m": 152.0,
   "start_elevation_m": 771.808499706073,
   "end_elevation_m": 772.5332539867084,
   "min_gradient_pct": 0.060673266985607675
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.547868672909317,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 148.0,
   "end_distance_m": 153.0,
   "start_elevation_m": 771.630803049258,
   "end_elevation_m": 772.7581964829035,
   "min_gradient_pct": 0.18637042255932101
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.601959031986553,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 157.0,
   "end_distance_m": 167.0,
   "start_elevation_m": 773.5036118961987,
   "end_elevation_m": 775.6638077993973,
   "min_gradient_pct": 1.0514781920198857
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.391516724647204,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 149.0,
   "end_distance_m": 169.0,
   "start_elevation_m": 771.808499706073,
   "end_elevation_m": 776.0868030510024,
   "min_gradient_pct": 1.9075723710585635
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.78900901779525,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 144.0,
   "end_distance_m": 169.0,
   "start_elevation_m": 770.8895507965536,
   "end_elevation_m": 776.0868030510024,
   "min_gradient_pct": 2.0321595415935008
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.79602659447437,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 121.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 766.4940081099309,
   "end_elevation_m": 776.392021407168,
   "min_gradient_pct": 2.455878287833457
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.34907932090573,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 94.0,
   "end_distance_m": 194.0,
   "start_elevation_m": 761.8748743500225,
   "end_elevation_m": 780.2239536709283,
   "min_gradient_pct": 5.066031763572255
  }
 ],
 "shape": {
  "ascent_concentration": 0.413,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 164.0,
  "shape_class": "sustained"
 },
 "length_m": 253.8978832028151,
 "start_elevation_m": 757.8727535400395,
 "end_elevation_m": 787.7418159166936,
 "endpoint_gain_m": 29.86906237665403,
 "overall_gradient_pct": 11.764202993687208,
 "accumulated_ascent_m": 29.88531194667678,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.547868672909317,
   "start_distance_m": 148.0,
   "end_distance_m": 153.0,
   "midpoint_distance_m": 150.5,
   "start_elevation_m": 771.630803049258,
   "end_elevation_m": 772.7581964829035,
   "start_xy": [
    926597.618675835,
    6457510.45419852
   ],
   "end_xy": [
    926602.3448508531,
    6457512.086151245
   ]
  },
  "max_10m": {
   "gradient_pct": 21.601959031986553,
   "start_distance_m": 157.0,
   "end_distance_m": 167.0,
   "midpoint_distance_m": 162.0,
   "start_elevation_m": 773.5036118961987,
   "end_elevation_m": 775.6638077993973,
   "start_xy": [
    926606.0116183351,
    6457513.669336236
   ],
   "end_xy": [
    926614.9132035844,
    6457518.175975963
   ]
  },
  "max_20m": {
   "gradient_pct": 21.391516724647204,
   "start_distance_m": 149.0,
   "end_distance_m": 169.0,
   "midpoint_distance_m": 159.0,
   "start_elevation_m": 771.808499706073,
   "end_elevation_m": 776.0868030510024,
   "start_xy": [
    926598.5639108387,
    6457510.780589065
   ],
   "end_xy": [
    926616.4613301499,
    6457519.442192428
   ]
  },
  "max_25m": {
   "gradient_pct": 20.78900901779525,
   "start_distance_m": 144.0,
   "end_distance_m": 169.0,
   "midpoint_distance_m": 156.5,
   "start_elevation_m": 770.8895507965536,
   "end_elevation_m": 776.0868030510024,
   "start_xy": [
    926593.8377358206,
    6457509.148636339
   ],
   "end_xy": [
    926616.4613301499,
    6457519.442192428
   ]
  },
  "max_50m": {
   "gradient_pct": 19.79602659447437,
   "start_distance_m": 121.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 146.0,
   "start_elevation_m": 766.4940081099309,
   "end_elevation_m": 776.392021407168,
   "start_xy": [
    926572.0254229462,
    6457501.859885692
   ],
   "end_xy": [
    926617.1888460886,
    6457521.2235127175
   ]
  },
  "max_100m": {
   "gradient_pct": 18.34907932090573,
   "start_distance_m": 94.0,
   "end_distance_m": 194.0,
   "midpoint_distance_m": 144.0,
   "start_elevation_m": 761.8748743500225,
   "end_elevation_m": 780.2239536709283,
   "start_xy": [
    926546.0025697221,
    6457497.629824981
   ],
   "end_xy": [
    926613.4433428629,
    6457543.163810453
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.18637042255932101,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 757.8727535400395,
   "end_elevation_m": 757.8820720611675,
   "start_xy": [
    926492.6,
    6457568.795
   ],
   "end_xy": [
    926495.2114112724,
    6457564.531136591
   ]
  },
  "min_10m": {
   "gradient_pct": 1.0514781920198857,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 757.8727535400395,
   "end_elevation_m": 757.9779013592415,
   "start_xy": [
    926492.6,
    6457568.795
   ],
   "end_xy": [
    926497.6191404673,
    6457560.152264145
   ]
  },
  "min_20m": {
   "gradient_pct": 1.9075723710585635,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 757.8727535400395,
   "end_elevation_m": 758.2542680142512,
   "start_xy": [
    926492.6,
    6457568.795
   ],
   "end_xy": [
    926502.165887548,
    6457551.245934884
   ]
  },
  "min_25m": {
   "gradient_pct": 2.0321595415935008,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 757.8727535400395,
   "end_elevation_m": 758.3807934254379,
   "start_xy": [
    926492.6,
    6457568.795
   ],
   "end_xy": [
    926504.4091763598,
    6457546.777416639
   ]
  },
  "min_50m": {
   "gradient_pct": 2.455878287833457,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 757.8727535400395,
   "end_elevation_m": 759.1006926839563,
   "start_xy": [
    926492.6,
    6457568.795
   ],
   "end_xy": [
    926515.7393471458,
    6457524.493019475
   ]
  },
  "min_100m": {
   "gradient_pct": 5.066031763572255,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 757.8727535400395,
   "end_elevation_m": 762.9387853036118,
   "start_xy": [
    926492.6,
    6457568.795
   ],
   "end_xy": [
    926551.941216064,
    6457496.847442654
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.074829825422285,
   "start_distance_m": 149.0,
   "end_distance_m": 151.0,
   "midpoint_distance_m": 150.0,
   "start_elevation_m": 771.808499706073,
   "end_elevation_m": 772.3099963025815,
   "start_xy": [
    926598.5639108387,
    6457510.780589065
   ],
   "end_xy": [
    926600.4543808459,
    6457511.433370155
   ]
  },
  "max_3m": {
   "gradient_pct": 24.158476021178405,
   "start_distance_m": 149.0,
   "end_distance_m": 152.0,
   "midpoint_distance_m": 150.5,
   "start_elevation_m": 771.808499706073,
   "end_elevation_m": 772.5332539867084,
   "start_xy": [
    926598.5639108387,
    6457510.780589065
   ],
   "end_xy": [
    926601.3996158495,
    6457511.7597607
   ]
  }
 },
 "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": 0.31,
   "obstruction_max_height_m": 21.12,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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_E926-N6457_0m5.tif"
  ],
  "calculated_at": "2026-09-17T05:03:11+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": [
   "E926-N6457"
  ],
  "elevation_blocks": [
   "21LHD6PM@2025-03-25"
  ],
  "ign_dalles": [
   "LHD_FXX_0926_6458_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD6PM"
  ],
  "ign_editions": [
   "2025-03-25"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0926_6458_MNT_O_0M50_LAMB93_IGN69": "2025-03-25"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 17,
   "stations_resolved": 17,
   "width_median_m": 6.75,
   "width_p10_m": 4.4,
   "width_min_m": 4.0,
   "width_max_m": 9.25,
   "bounded_share": 0.118,
   "unbounded_share": 0.882,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.88,
   "window_m": [
    144.0,
    169.0
   ],
   "width_at_max25_m": 7.25,
   "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": 4.25,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.824,
    "unbounded_share": 0.176,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.0,
    "window_m": [
     144.0,
     169.0
    ],
    "width_at_max25_m": 2.75,
    "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": "Revel",
  "county": "Is\u00e8re",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}