{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.0083, 7.3147)",
 "slug": "discovered-lane-44-0083-7-3147",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 51.57612616959568,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 224.0,
   "end_distance_m": 226.0,
   "start_elevation_m": 614.7284055472106,
   "end_elevation_m": 615.7599280706025,
   "min_gradient_pct": -21.264498900501394
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 43.45836613754651,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 223.0,
   "end_distance_m": 226.0,
   "start_elevation_m": 614.4561770864761,
   "end_elevation_m": 615.7599280706025,
   "min_gradient_pct": -19.33336563413377
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 32.467032501119775,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 5.0,
   "end_distance_m": 10.0,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 594.5115410569846,
   "min_gradient_pct": -16.969046070826153
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.018697218032912,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 5.0,
   "end_distance_m": 15.0,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 595.5900591537319,
   "min_gradient_pct": -13.151329704252248
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.31209188036064,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 5.0,
   "end_distance_m": 25.0,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 597.7506078080007,
   "min_gradient_pct": -7.399434708229364
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.775051538073058,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 5.0,
   "end_distance_m": 30.0,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 598.8319523164469,
   "min_gradient_pct": -5.196363328402185
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.241717628491642,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 5.0,
   "end_distance_m": 55.0,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 603.5090482461744,
   "min_gradient_pct": 0.40684942542634417
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.265943454888884,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 5.0,
   "end_distance_m": 105.0,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 608.1541328868175,
   "min_gradient_pct": 4.2955810316922225
  }
 ],
 "shape": {
  "ascent_concentration": 0.452,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 64.0,
  "shape_class": "stepped"
 },
 "length_m": 227.30009548058345,
 "start_elevation_m": 592.7750026347626,
 "end_elevation_m": 615.9790651484105,
 "endpoint_gain_m": 23.204062513647955,
 "overall_gradient_pct": 10.208558190258264,
 "accumulated_ascent_m": 25.0383617218489,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 32.467032501119775,
   "start_distance_m": 5.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 7.5,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 594.5115410569846,
   "start_xy": [
    1045803.0804342111,
    6332613.349137618
   ],
   "end_xy": [
    1045802.5071420547,
    6332618.3060956225
   ]
  },
  "max_10m": {
   "gradient_pct": 27.018697218032912,
   "start_distance_m": 5.0,
   "end_distance_m": 15.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 595.5900591537319,
   "start_xy": [
    1045803.0804342111,
    6332613.349137618
   ],
   "end_xy": [
    1045802.3249310964,
    6332623.278234315
   ]
  },
  "max_20m": {
   "gradient_pct": 24.31209188036064,
   "start_distance_m": 5.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 15.0,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 597.7506078080007,
   "start_xy": [
    1045803.0804342111,
    6332613.349137618
   ],
   "end_xy": [
    1045805.8415996756,
    6332632.4671803545
   ]
  },
  "max_25m": {
   "gradient_pct": 23.775051538073058,
   "start_distance_m": 5.0,
   "end_distance_m": 30.0,
   "midpoint_distance_m": 17.5,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 598.8319523164469,
   "start_xy": [
    1045803.0804342111,
    6332613.349137618
   ],
   "end_xy": [
    1045808.6023143822,
    6332636.635927686
   ]
  },
  "max_50m": {
   "gradient_pct": 21.241717628491642,
   "start_distance_m": 5.0,
   "end_distance_m": 55.0,
   "midpoint_distance_m": 30.0,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 603.5090482461744,
   "start_xy": [
    1045803.0804342111,
    6332613.349137618
   ],
   "end_xy": [
    1045820.6970603601,
    6332658.504348055
   ]
  },
  "max_100m": {
   "gradient_pct": 15.265943454888884,
   "start_distance_m": 5.0,
   "end_distance_m": 105.0,
   "midpoint_distance_m": 55.0,
   "start_elevation_m": 592.8881894319286,
   "end_elevation_m": 608.1541328868175,
   "start_xy": [
    1045803.0804342111,
    6332613.349137618
   ],
   "end_xy": [
    1045838.2587189539,
    6332705.065895901
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -16.969046070826153,
   "start_distance_m": 157.0,
   "end_distance_m": 162.0,
   "midpoint_distance_m": 159.5,
   "start_elevation_m": 612.3560149046741,
   "end_elevation_m": 611.5075626011328,
   "start_xy": [
    1045846.887257487,
    6332755.497473867
   ],
   "end_xy": [
    1045846.400161507,
    6332760.47351534
   ]
  },
  "min_10m": {
   "gradient_pct": -13.151329704252248,
   "start_distance_m": 156.0,
   "end_distance_m": 166.0,
   "midpoint_distance_m": 161.0,
   "start_elevation_m": 612.4427756850712,
   "end_elevation_m": 611.127642714646,
   "start_xy": [
    1045847.0266541748,
    6332754.507237247
   ],
   "end_xy": [
    1045846.0170580391,
    6332764.455127041
   ]
  },
  "min_20m": {
   "gradient_pct": -7.399434708229364,
   "start_distance_m": 151.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 161.0,
   "start_elevation_m": 612.5980904131534,
   "end_elevation_m": 611.1182034715075,
   "start_xy": [
    1045847.7236376136,
    6332749.556054147
   ],
   "end_xy": [
    1045846.8079544492,
    6332769.345859533
   ]
  },
  "min_25m": {
   "gradient_pct": -5.196363328402185,
   "start_distance_m": 149.0,
   "end_distance_m": 174.0,
   "midpoint_distance_m": 161.5,
   "start_elevation_m": 612.5027981123505,
   "end_elevation_m": 611.20370728025,
   "start_xy": [
    1045848.002430989,
    6332747.575580907
   ],
   "end_xy": [
    1045847.4966055381,
    6332772.265749887
   ]
  },
  "min_50m": {
   "gradient_pct": 0.40684942542634417,
   "start_distance_m": 136.0,
   "end_distance_m": 186.0,
   "midpoint_distance_m": 161.0,
   "start_elevation_m": 611.571505339184,
   "end_elevation_m": 611.7749300518972,
   "start_xy": [
    1045846.5358214977,
    6332734.71525381
   ],
   "end_xy": [
    1045850.4748073884,
    6332783.88841958
   ]
  },
  "min_100m": {
   "gradient_pct": 4.2955810316922225,
   "start_distance_m": 122.0,
   "end_distance_m": 222.0,
   "midpoint_distance_m": 172.0,
   "start_elevation_m": 610.0647487949207,
   "end_elevation_m": 614.3603298266129,
   "start_xy": [
    1045843.9267641079,
    6332720.961102941
   ],
   "end_xy": [
    1045859.7932959459,
    6332817.942936931
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 51.57612616959568,
   "start_distance_m": 224.0,
   "end_distance_m": 226.0,
   "midpoint_distance_m": 225.0,
   "start_elevation_m": 614.7284055472106,
   "end_elevation_m": 615.7599280706025,
   "start_xy": [
    1045858.7181092983,
    6332819.629345443
   ],
   "end_xy": [
    1045857.6429226507,
    6332821.315753956
   ]
  },
  "max_3m": {
   "gradient_pct": 43.45836613754651,
   "start_distance_m": 223.0,
   "end_distance_m": 226.0,
   "midpoint_distance_m": 224.5,
   "start_elevation_m": 614.4561770864761,
   "end_elevation_m": 615.7599280706025,
   "start_xy": [
    1045859.2557026221,
    6332818.786141187
   ],
   "end_xy": [
    1045857.6429226507,
    6332821.315753956
   ]
  }
 },
 "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": 0.288,
   "obstruction_max_height_m": 20.31,
   "flagged_windows_m": []
  },
  "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_E1045-N6332_0m5.tif"
  ],
  "calculated_at": "2026-09-17T02:16:29+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": [
   "E1045-N6332"
  ],
  "elevation_blocks": [
   "21LHD8SP@2025-06-20"
  ],
  "ign_dalles": [
   "LHD_FXX_1045_6333_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD8SP"
  ],
  "ign_editions": [
   "2025-06-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1045_6333_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": 15,
   "stations_resolved": 15,
   "width_median_m": 3.75,
   "width_p10_m": 1.3,
   "width_min_m": 1.0,
   "width_max_m": 8.75,
   "bounded_share": 0.4,
   "unbounded_share": 0.6,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.38,
   "window_m": [
    5.0,
    30.0
   ],
   "width_at_max25_m": 3.5,
   "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": 15,
    "stations_resolved": 15,
    "width_median_m": 4.0,
    "width_p10_m": 1.95,
    "width_min_m": 1.5,
    "width_max_m": 9.75,
    "bounded_share": 0.933,
    "unbounded_share": 0.067,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.0,
    "window_m": [
     5.0,
     30.0
    ],
    "width_at_max25_m": 4.62,
    "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": "Roquebilli\u00e8re",
  "county": "Alpes-Maritimes",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}