{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (42.2574, 8.7445)",
 "slug": "discovered-lane-42-2574-8-7445",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.092953575076308,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 81.0,
   "end_distance_m": 83.0,
   "start_elevation_m": 313.2883110608296,
   "end_elevation_m": 313.8701701323311,
   "min_gradient_pct": -5.442256650445643
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.57282107922947,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 87.0,
   "end_distance_m": 90.0,
   "start_elevation_m": 314.9037650706818,
   "end_elevation_m": 315.7309497030587,
   "min_gradient_pct": -3.4818298229235247
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.32916320705158,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 85.0,
   "end_distance_m": 90.0,
   "start_elevation_m": 314.3644915427061,
   "end_elevation_m": 315.7309497030587,
   "min_gradient_pct": -1.4159076311443641
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.963698901032558,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 81.0,
   "end_distance_m": 91.0,
   "start_elevation_m": 313.2883110608296,
   "end_elevation_m": 315.98468095093284,
   "min_gradient_pct": -0.6477404604436288
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.699202256870933,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 81.0,
   "end_distance_m": 101.0,
   "start_elevation_m": 313.2883110608296,
   "end_elevation_m": 318.6281515122038,
   "min_gradient_pct": 0.24285728550722752
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 26.562074699414325,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 81.0,
   "end_distance_m": 106.0,
   "start_elevation_m": 313.2883110608296,
   "end_elevation_m": 319.92882973568317,
   "min_gradient_pct": 0.8252116145301898
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 24.83876311248855,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 80.0,
   "end_distance_m": 130.0,
   "start_elevation_m": 313.08158694815546,
   "end_elevation_m": 325.50096850439974,
   "min_gradient_pct": 2.976202613640112
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.457549393057377,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 47.0,
   "end_distance_m": 147.0,
   "start_elevation_m": 307.6225753759675,
   "end_elevation_m": 328.08012476902485,
   "min_gradient_pct": 6.7212335291424665
  }
 ],
 "shape": {
  "ascent_concentration": 0.444,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 110.0,
  "shape_class": "sustained"
 },
 "length_m": 345.2482312658314,
 "start_elevation_m": 301.8158159546018,
 "end_elevation_m": 343.0415657851517,
 "endpoint_gain_m": 41.22574983054989,
 "overall_gradient_pct": 11.940901095828416,
 "accumulated_ascent_m": 41.49192572620262,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.32916320705158,
   "start_distance_m": 85.0,
   "end_distance_m": 90.0,
   "midpoint_distance_m": 87.5,
   "start_elevation_m": 314.3644915427061,
   "end_elevation_m": 315.7309497030587,
   "start_xy": [
    1174423.0777039465,
    6145806.244494939
   ],
   "end_xy": [
    1174423.191080398,
    6145811.243209353
   ]
  },
  "max_10m": {
   "gradient_pct": 26.963698901032558,
   "start_distance_m": 81.0,
   "end_distance_m": 91.0,
   "midpoint_distance_m": 86.0,
   "start_elevation_m": 313.2883110608296,
   "end_elevation_m": 315.98468095093284,
   "start_xy": [
    1174422.9870027853,
    6145802.24552341
   ],
   "end_xy": [
    1174423.2137556882,
    6145812.242952235
   ]
  },
  "max_20m": {
   "gradient_pct": 26.699202256870933,
   "start_distance_m": 81.0,
   "end_distance_m": 101.0,
   "midpoint_distance_m": 91.0,
   "start_elevation_m": 313.2883110608296,
   "end_elevation_m": 318.6281515122038,
   "start_xy": [
    1174422.9870027853,
    6145802.24552341
   ],
   "end_xy": [
    1174423.4405085912,
    6145822.24038106
   ]
  },
  "max_25m": {
   "gradient_pct": 26.562074699414325,
   "start_distance_m": 81.0,
   "end_distance_m": 106.0,
   "midpoint_distance_m": 93.5,
   "start_elevation_m": 313.2883110608296,
   "end_elevation_m": 319.92882973568317,
   "start_xy": [
    1174422.9870027853,
    6145802.24552341
   ],
   "end_xy": [
    1174423.5458202392,
    6145827.239221133
   ]
  },
  "max_50m": {
   "gradient_pct": 24.83876311248855,
   "start_distance_m": 80.0,
   "end_distance_m": 130.0,
   "midpoint_distance_m": 105.0,
   "start_elevation_m": 313.08158694815546,
   "end_elevation_m": 325.50096850439974,
   "start_xy": [
    1174422.964327495,
    6145801.245780527
   ],
   "end_xy": [
    1174424.2710691225,
    6145851.1789626675
   ]
  },
  "max_100m": {
   "gradient_pct": 20.457549393057377,
   "start_distance_m": 47.0,
   "end_distance_m": 147.0,
   "midpoint_distance_m": 97.0,
   "start_elevation_m": 307.6225753759675,
   "end_elevation_m": 328.08012476902485,
   "start_xy": [
    1174431.92556233,
    6145769.6945389025
   ],
   "end_xy": [
    1174417.0316680137,
    6145864.69154929
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.4159076311443641,
   "start_distance_m": 198.0,
   "end_distance_m": 203.0,
   "midpoint_distance_m": 200.5,
   "start_elevation_m": 334.67678648104646,
   "end_elevation_m": 334.60599109948924,
   "start_xy": [
    1174372.2043849418,
    6145881.379636982
   ],
   "end_xy": [
    1174367.2321565712,
    6145881.064529606
   ]
  },
  "min_10m": {
   "gradient_pct": -0.6477404604436288,
   "start_distance_m": 199.0,
   "end_distance_m": 209.0,
   "midpoint_distance_m": 204.0,
   "start_elevation_m": 334.68768854899133,
   "end_elevation_m": 334.62291450294697,
   "start_xy": [
    1174371.2089470213,
    6145881.2842255235
   ],
   "end_xy": [
    1174361.416366414,
    6145882.380700544
   ]
  },
  "min_20m": {
   "gradient_pct": 0.24285728550722752,
   "start_distance_m": 198.0,
   "end_distance_m": 218.0,
   "midpoint_distance_m": 208.0,
   "start_elevation_m": 334.67678648104646,
   "end_elevation_m": 334.7253579381479,
   "start_xy": [
    1174372.2043849418,
    6145881.379636982
   ],
   "end_xy": [
    1174353.1651029212,
    6145885.974674776
   ]
  },
  "min_25m": {
   "gradient_pct": 0.8252116145301898,
   "start_distance_m": 198.0,
   "end_distance_m": 223.0,
   "midpoint_distance_m": 210.5,
   "start_elevation_m": 334.67678648104646,
   "end_elevation_m": 334.883089384679,
   "start_xy": [
    1174372.2043849418,
    6145881.379636982
   ],
   "end_xy": [
    1174348.5810676476,
    6145887.971327127
   ]
  },
  "min_50m": {
   "gradient_pct": 2.976202613640112,
   "start_distance_m": 275.0,
   "end_distance_m": 325.0,
   "midpoint_distance_m": 300.0,
   "start_elevation_m": 340.7668260227387,
   "end_elevation_m": 342.25492732955877,
   "start_xy": [
    1174302.0113472717,
    6145910.816036329
   ],
   "end_xy": [
    1174347.8582127308,
    6145905.830171491
   ]
  },
  "min_100m": {
   "gradient_pct": 6.7212335291424665,
   "start_distance_m": 198.0,
   "end_distance_m": 298.0,
   "midpoint_distance_m": 248.0,
   "start_elevation_m": 334.67678648104646,
   "end_elevation_m": 341.39802001018893,
   "start_xy": [
    1174372.2043849418,
    6145881.379636982
   ],
   "end_xy": [
    1174320.9608559923,
    6145908.158473053
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.092953575076308,
   "start_distance_m": 81.0,
   "end_distance_m": 83.0,
   "midpoint_distance_m": 82.0,
   "start_elevation_m": 313.2883110608296,
   "end_elevation_m": 313.8701701323311,
   "start_xy": [
    1174422.9870027853,
    6145802.24552341
   ],
   "end_xy": [
    1174423.0323533658,
    6145804.245009175
   ]
  },
  "max_3m": {
   "gradient_pct": 27.57282107922947,
   "start_distance_m": 87.0,
   "end_distance_m": 90.0,
   "midpoint_distance_m": 88.5,
   "start_elevation_m": 314.9037650706818,
   "end_elevation_m": 315.7309497030587,
   "start_xy": [
    1174423.123054527,
    6145808.243980705
   ],
   "end_xy": [
    1174423.191080398,
    6145811.243209353
   ]
  }
 },
 "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": 0.095,
   "obstruction_max_height_m": 11.73,
   "flagged_windows_m": [
    2,
    10
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "33abfff569d4360542e616d0d42c1b94d0a711fa",
   "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-co1",
   "road_pbf": "block-batch-fr-co1.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": "sha256:2a717d675f2607cc"
  },
  "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_E1174-N6145_0m5@21LHDCorseUS-2025-04-02.tif"
  ],
  "calculated_at": "2026-09-25T00:20:34+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-co1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-co1",
  "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": [
   "E1174-N6145"
  ],
  "elevation_blocks": [
   "21LHDCorseUS@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_1174_6146_MNT_O_0M50_LAMB93_IGN78"
  ],
  "ign_missions": [
   "21LHDCorseUS"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1174_6146_MNT_O_0M50_LAMB93_IGN78": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 3,
  "carriageway": {
   "stations": 20,
   "stations_resolved": 20,
   "width_median_m": 3.38,
   "width_p10_m": 2.73,
   "width_min_m": 2.5,
   "width_max_m": 7.75,
   "bounded_share": 0.45,
   "unbounded_share": 0.55,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.0,
   "window_m": [
    81.0,
    106.0
   ],
   "width_at_max25_m": 3.0,
   "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": 20,
    "stations_resolved": 20,
    "width_median_m": 2.88,
    "width_p10_m": 0.98,
    "width_min_m": 0.5,
    "width_max_m": 6.75,
    "bounded_share": 1.0,
    "unbounded_share": 0.0,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.88,
    "window_m": [
     81.0,
     106.0
    ],
    "width_at_max25_m": 1.25,
    "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": "Ota",
  "county": "Corse-du-Sud",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}