{
 "ocl_version": "0.1.0",
 "name": "Lane near Les Courroies",
 "slug": "discovered-lane-45-1581-0-5287",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.935783396667176,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 6.0,
   "end_distance_m": 8.0,
   "start_elevation_m": 66.65000391091002,
   "end_elevation_m": 67.12871957884336,
   "min_gradient_pct": -7.84958924884549
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.00180984826928,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 864.0,
   "end_distance_m": 867.0,
   "start_elevation_m": 142.6359591654434,
   "end_elevation_m": 143.3260134608915,
   "min_gradient_pct": -7.372459647056455
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.344756687929248,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 862.0,
   "end_distance_m": 867.0,
   "start_elevation_m": 142.20877562649503,
   "end_elevation_m": 143.3260134608915,
   "min_gradient_pct": -7.189489668791396
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.98947965535325,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 862.0,
   "end_distance_m": 872.0,
   "start_elevation_m": 142.20877562649503,
   "end_elevation_m": 144.40772359203035,
   "min_gradient_pct": -7.01385766136525
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.54865728246989,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 853.0,
   "end_distance_m": 873.0,
   "start_elevation_m": 140.31767032760416,
   "end_elevation_m": 144.62740178409814,
   "min_gradient_pct": -6.280477624997118
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.403586650542366,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 860.0,
   "end_distance_m": 885.0,
   "start_elevation_m": 141.77390186023874,
   "end_elevation_m": 147.12479852287433,
   "min_gradient_pct": -5.825835652939929
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.890550077078615,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 851.0,
   "end_distance_m": 901.0,
   "start_elevation_m": 139.9044497632372,
   "end_elevation_m": 150.34972480177652,
   "min_gradient_pct": -3.037014032093765
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.013527367667905,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 849.0,
   "end_distance_m": 949.0,
   "start_elevation_m": 139.53529390518258,
   "end_elevation_m": 159.5488212728505,
   "min_gradient_pct": 1.8045843826952819
  }
 ],
 "shape": {
  "ascent_concentration": 0.395,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 285.0,
  "shape_class": "sustained"
 },
 "length_m": 1029.379984440009,
 "start_elevation_m": 66.39928075352219,
 "end_elevation_m": 167.41821733691162,
 "endpoint_gain_m": 101.01893658338943,
 "overall_gradient_pct": 9.81357109234493,
 "accumulated_ascent_m": 103.74892596883855,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.344756687929248,
   "start_distance_m": 862.0,
   "end_distance_m": 867.0,
   "midpoint_distance_m": 864.5,
   "start_elevation_m": 142.20877562649503,
   "end_elevation_m": 143.3260134608915,
   "start_xy": [
    505708.27399437636,
    6454233.617126523
   ],
   "end_xy": [
    505705.53873923304,
    6454237.802622826
   ]
  },
  "max_10m": {
   "gradient_pct": 21.98947965535325,
   "start_distance_m": 862.0,
   "end_distance_m": 872.0,
   "midpoint_distance_m": 867.0,
   "start_elevation_m": 142.20877562649503,
   "end_elevation_m": 144.40772359203035,
   "start_xy": [
    505708.27399437636,
    6454233.617126523
   ],
   "end_xy": [
    505702.80348408973,
    6454241.988119128
   ]
  },
  "max_20m": {
   "gradient_pct": 21.54865728246989,
   "start_distance_m": 853.0,
   "end_distance_m": 873.0,
   "midpoint_distance_m": 863.0,
   "start_elevation_m": 140.31767032760416,
   "end_elevation_m": 144.62740178409814,
   "start_xy": [
    505712.67069401697,
    6454225.780357124
   ],
   "end_xy": [
    505702.25643306103,
    6454242.825218389
   ]
  },
  "max_25m": {
   "gradient_pct": 21.403586650542366,
   "start_distance_m": 860.0,
   "end_distance_m": 885.0,
   "midpoint_distance_m": 872.5,
   "start_elevation_m": 141.77390186023874,
   "end_elevation_m": 147.12479852287433,
   "start_xy": [
    505709.3680964337,
    6454231.942928002
   ],
   "end_xy": [
    505695.691820717,
    6454252.870409516
   ]
  },
  "max_50m": {
   "gradient_pct": 20.890550077078615,
   "start_distance_m": 851.0,
   "end_distance_m": 901.0,
   "midpoint_distance_m": 876.0,
   "start_elevation_m": 139.9044497632372,
   "end_elevation_m": 150.34972480177652,
   "start_xy": [
    505713.45553148864,
    6454223.940997475
   ],
   "end_xy": [
    505685.4724586099,
    6454265.106476179
   ]
  },
  "max_100m": {
   "gradient_pct": 20.013527367667905,
   "start_distance_m": 849.0,
   "end_distance_m": 949.0,
   "midpoint_distance_m": 899.0,
   "start_elevation_m": 139.53529390518258,
   "end_elevation_m": 159.5488212728505,
   "start_xy": [
    505714.23456405953,
    6454222.098958319
   ],
   "end_xy": [
    505656.7025585651,
    6454303.014899511
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.189489668791396,
   "start_distance_m": 209.0,
   "end_distance_m": 214.0,
   "midpoint_distance_m": 211.5,
   "start_elevation_m": 90.99493061307236,
   "end_elevation_m": 90.63545612963279,
   "start_xy": [
    506091.51103186427,
    6453769.975642649
   ],
   "end_xy": [
    506086.5544810231,
    6453770.6333688535
   ]
  },
  "min_10m": {
   "gradient_pct": -7.01385766136525,
   "start_distance_m": 208.0,
   "end_distance_m": 218.0,
   "midpoint_distance_m": 213.0,
   "start_elevation_m": 91.07367754716863,
   "end_elevation_m": 90.3722917810321,
   "start_xy": [
    506092.5023420325,
    6453769.8440974085
   ],
   "end_xy": [
    506082.5892403502,
    6453771.1595498165
   ]
  },
  "min_20m": {
   "gradient_pct": -6.280477624997118,
   "start_distance_m": 206.0,
   "end_distance_m": 226.0,
   "midpoint_distance_m": 216.0,
   "start_elevation_m": 91.19703459802558,
   "end_elevation_m": 89.94093907302616,
   "start_xy": [
    506094.48496236897,
    6453769.581006927
   ],
   "end_xy": [
    506074.8763035231,
    6453773.164017412
   ]
  },
  "min_25m": {
   "gradient_pct": -5.825835652939929,
   "start_distance_m": 206.0,
   "end_distance_m": 231.0,
   "midpoint_distance_m": 218.5,
   "start_elevation_m": 91.19703459802558,
   "end_elevation_m": 89.7405756847906,
   "start_xy": [
    506094.48496236897,
    6453769.581006927
   ],
   "end_xy": [
    506070.1259528682,
    6453774.724199663
   ]
  },
  "min_50m": {
   "gradient_pct": -3.037014032093765,
   "start_distance_m": 198.0,
   "end_distance_m": 248.0,
   "midpoint_distance_m": 223.0,
   "start_elevation_m": 91.3106085750514,
   "end_elevation_m": 89.79210155900452,
   "start_xy": [
    506102.41544371477,
    6453768.528645001
   ],
   "end_xy": [
    506054.4484563783,
    6453781.015331759
   ]
  },
  "min_100m": {
   "gradient_pct": 1.8045843826952819,
   "start_distance_m": 192.0,
   "end_distance_m": 292.0,
   "midpoint_distance_m": 242.0,
   "start_elevation_m": 91.10558999703049,
   "end_elevation_m": 92.91017437972577,
   "start_xy": [
    506108.15149751905,
    6453767.373527109
   ],
   "end_xy": [
    506022.970321923,
    6453811.265367416
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.935783396667176,
   "start_distance_m": 6.0,
   "end_distance_m": 8.0,
   "midpoint_distance_m": 7.0,
   "start_elevation_m": 66.65000391091002,
   "end_elevation_m": 67.12871957884336,
   "start_xy": [
    506257.262460068,
    6453657.118338969
   ],
   "end_xy": [
    506255.653613424,
    6453658.306451958
   ]
  },
  "max_3m": {
   "gradient_pct": 23.00180984826928,
   "start_distance_m": 864.0,
   "end_distance_m": 867.0,
   "midpoint_distance_m": 865.5,
   "start_elevation_m": 142.6359591654434,
   "end_elevation_m": 143.3260134608915,
   "start_xy": [
    505707.1798923191,
    6454235.291325044
   ],
   "end_xy": [
    505705.53873923304,
    6454237.802622826
   ]
  }
 },
 "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": 0.113,
   "obstruction_max_height_m": 26.28,
   "flagged_windows_m": [
    2
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "16bcc1553fe58b280e0c4a66a3ab0980530490a6",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:8c94015b54267da4",
   "python": "3.14.4",
   "numpy": "2.5.3",
   "rasterio": "1.5.1",
   "pyproj": "3.8.0",
   "laspy": "2.7.0",
   "shapely": "2.1.2",
   "pyosmium": "4.3.1",
   "libosmium": "2.23.1",
   "gdal": "3.12.4",
   "proj": "9.8.1",
   "run_id": "fr-so4",
   "road_pbf": "block-batch-fr-so4.osm.pbf",
   "region_key": "france",
   "crs": "EPSG:2154",
   "elevation_provider_key": "ign-lidarhd",
   "tile_index": "wms-grid",
   "authority": "bdtopo",
   "registry_pbf": "france-vosges-2026-09-16.osm.pbf",
   "tile_index_snapshot": "sha256:18f786cf9fa98070"
  },
  "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_E505-N6453_0m5@21LHD2HM-2025-06-26.tif",
   "data/cache/fr/ign-lidarhd_dtm_E505-N6454_0m5@21LHD2HM-2025-06-26.tif",
   "data/cache/fr/ign-lidarhd_dtm_E506-N6453_0m5@21LHD2HM-2025-06-26.tif",
   "data/cache/fr/ign-lidarhd_dtm_E506-N6454_0m5@21LHD2HM-2025-06-26.tif"
  ],
  "calculated_at": "2026-09-27T04:24:28+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-so4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-so4",
  "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": [
   "E505-N6453",
   "E505-N6454",
   "E506-N6453",
   "E506-N6454"
  ],
  "elevation_blocks": [
   "21LHD2HM@2025-06-26"
  ],
  "ign_dalles": [
   "LHD_FXX_0505_6454_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0505_6455_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0506_6454_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0506_6455_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD2HM"
  ],
  "ign_editions": [
   "2025-06-26"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0505_6454_MNT_O_0M50_LAMB93_IGN69": "2025-06-26",
   "LHD_FXX_0505_6455_MNT_O_0M50_LAMB93_IGN69": "2025-06-26",
   "LHD_FXX_0506_6454_MNT_O_0M50_LAMB93_IGN69": "2025-06-26",
   "LHD_FXX_0506_6455_MNT_O_0M50_LAMB93_IGN69": "2025-06-26"
  },
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked",
  "carriageway": {
   "stations": 47,
   "stations_resolved": 47,
   "width_median_m": 7.75,
   "width_p10_m": 5.9,
   "width_min_m": 3.25,
   "width_max_m": 12.0,
   "bounded_share": 0.064,
   "unbounded_share": 0.936,
   "confidence_median": 0.0,
   "width_median_bounded_m": 8.0,
   "window_m": [
    860.0,
    885.0
   ],
   "width_at_max25_m": 7.0,
   "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": 47,
    "stations_resolved": 47,
    "width_median_m": 9.75,
    "width_p10_m": 1.95,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.34,
    "unbounded_share": 0.66,
    "confidence_median": 0.0,
    "width_median_bounded_m": 5.38,
    "window_m": [
     860.0,
     885.0
    ],
    "width_at_max25_m": 7.62,
    "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": "Saint-Astier",
  "county": "Dordogne",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}