{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (41.6533, 9.3467)",
 "slug": "discovered-lane-41-6533-9-3467",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 26.612042413612613,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 275.0,
   "end_distance_m": 277.0,
   "start_elevation_m": 39.87170058094938,
   "end_elevation_m": 40.40394142922163,
   "min_gradient_pct": -13.767187841800421
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.4045457606007,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 275.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 39.87170058094938,
   "end_elevation_m": 40.6638369537674,
   "min_gradient_pct": -13.32377758009263
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.220813480566676,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 275.0,
   "end_distance_m": 280.0,
   "start_elevation_m": 39.87170058094938,
   "end_elevation_m": 41.182741254977714,
   "min_gradient_pct": -12.366514809414753
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.73582816139542,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 273.0,
   "end_distance_m": 283.0,
   "start_elevation_m": 39.358648985950445,
   "end_elevation_m": 41.93223180208999,
   "min_gradient_pct": -7.969616193671527
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.373733614247556,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 273.0,
   "end_distance_m": 293.0,
   "start_elevation_m": 39.358648985950445,
   "end_elevation_m": 44.43339570879996,
   "min_gradient_pct": -2.0071450285872316
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.081555009634485,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 269.0,
   "end_distance_m": 294.0,
   "start_elevation_m": 38.3949286303401,
   "end_elevation_m": 44.66531738274872,
   "min_gradient_pct": -0.7287599572347858
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 23.832271012785895,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 271.0,
   "end_distance_m": 321.0,
   "start_elevation_m": 38.878356287216846,
   "end_elevation_m": 50.794491793609794,
   "min_gradient_pct": 2.146195262577841
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.718208683352294,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 246.0,
   "end_distance_m": 346.0,
   "start_elevation_m": 34.127285158371144,
   "end_elevation_m": 55.84549384172344,
   "min_gradient_pct": 4.104647286386172
  }
 ],
 "shape": {
  "ascent_concentration": 0.481,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 128.0,
  "shape_class": "stepped"
 },
 "length_m": 553.7588240296726,
 "start_elevation_m": 20.546359185364768,
 "end_elevation_m": 72.51156650773136,
 "endpoint_gain_m": 51.965207322366595,
 "overall_gradient_pct": 9.384086549487128,
 "accumulated_ascent_m": 53.097535035705334,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.220813480566676,
   "start_distance_m": 275.0,
   "end_distance_m": 280.0,
   "midpoint_distance_m": 277.5,
   "start_elevation_m": 39.87170058094938,
   "end_elevation_m": 41.182741254977714,
   "start_xy": [
    1229367.85319975,
    6082550.344950592
   ],
   "end_xy": [
    1229366.1905311728,
    6082555.060407431
   ]
  },
  "max_10m": {
   "gradient_pct": 25.73582816139542,
   "start_distance_m": 273.0,
   "end_distance_m": 283.0,
   "midpoint_distance_m": 278.0,
   "start_elevation_m": 39.358648985950445,
   "end_elevation_m": 41.93223180208999,
   "start_xy": [
    1229368.5182671808,
    6082548.4587678565
   ],
   "end_xy": [
    1229365.1929300262,
    6082557.889681535
   ]
  },
  "max_20m": {
   "gradient_pct": 25.373733614247556,
   "start_distance_m": 273.0,
   "end_distance_m": 293.0,
   "midpoint_distance_m": 283.0,
   "start_elevation_m": 39.358648985950445,
   "end_elevation_m": 44.43339570879996,
   "start_xy": [
    1229368.5182671808,
    6082548.4587678565
   ],
   "end_xy": [
    1229364.728785713,
    6082567.759200409
   ]
  },
  "max_25m": {
   "gradient_pct": 25.081555009634485,
   "start_distance_m": 269.0,
   "end_distance_m": 294.0,
   "midpoint_distance_m": 281.5,
   "start_elevation_m": 38.3949286303401,
   "end_elevation_m": 44.66531738274872,
   "start_xy": [
    1229369.8484020426,
    6082544.686402385
   ],
   "end_xy": [
    1229364.7635468047,
    6082568.75859606
   ]
  },
  "max_50m": {
   "gradient_pct": 23.832271012785895,
   "start_distance_m": 271.0,
   "end_distance_m": 321.0,
   "midpoint_distance_m": 296.0,
   "start_elevation_m": 38.878356287216846,
   "end_elevation_m": 50.794491793609794,
   "start_xy": [
    1229369.1833346118,
    6082546.572585121
   ],
   "end_xy": [
    1229373.0959862724,
    6082593.894580749
   ]
  },
  "max_100m": {
   "gradient_pct": 21.718208683352294,
   "start_distance_m": 246.0,
   "end_distance_m": 346.0,
   "midpoint_distance_m": 296.0,
   "start_elevation_m": 34.127285158371144,
   "end_elevation_m": 55.84549384172344,
   "start_xy": [
    1229383.0072055883,
    6082525.84107339
   ],
   "end_xy": [
    1229390.3215080285,
    6082611.3824199755
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -12.366514809414753,
   "start_distance_m": 548.0,
   "end_distance_m": 553.0,
   "midpoint_distance_m": 550.5,
   "start_elevation_m": 73.22009817099637,
   "end_elevation_m": 72.60177243052563,
   "start_xy": [
    1229361.2411365835,
    6082642.43856293
   ],
   "end_xy": [
    1229356.6793227857,
    6082640.391649431
   ]
  },
  "min_10m": {
   "gradient_pct": -7.969616193671527,
   "start_distance_m": 543.0,
   "end_distance_m": 553.0,
   "midpoint_distance_m": 548.0,
   "start_elevation_m": 73.39873404989278,
   "end_elevation_m": 72.60177243052563,
   "start_xy": [
    1229365.8029503813,
    6082644.48547643
   ],
   "end_xy": [
    1229356.6793227857,
    6082640.391649431
   ]
  },
  "min_20m": {
   "gradient_pct": -2.0071450285872316,
   "start_distance_m": 533.0,
   "end_distance_m": 553.0,
   "midpoint_distance_m": 543.0,
   "start_elevation_m": 73.00320143624307,
   "end_elevation_m": 72.60177243052563,
   "start_xy": [
    1229375.3818576892,
    6082647.256465242
   ],
   "end_xy": [
    1229356.6793227857,
    6082640.391649431
   ]
  },
  "min_25m": {
   "gradient_pct": -0.7287599572347858,
   "start_distance_m": 528.0,
   "end_distance_m": 553.0,
   "midpoint_distance_m": 540.5,
   "start_elevation_m": 72.78396241983432,
   "end_elevation_m": 72.60177243052563,
   "start_xy": [
    1229380.2371609788,
    6082648.450630208
   ],
   "end_xy": [
    1229356.6793227857,
    6082640.391649431
   ]
  },
  "min_50m": {
   "gradient_pct": 2.146195262577841,
   "start_distance_m": 1.0,
   "end_distance_m": 51.0,
   "midpoint_distance_m": 26.0,
   "start_elevation_m": 20.594462474754057,
   "end_elevation_m": 21.667560106042977,
   "start_xy": [
    1229528.0231417539,
    6082383.417616621
   ],
   "end_xy": [
    1229493.6992709602,
    6082410.445235609
   ]
  },
  "min_100m": {
   "gradient_pct": 4.104647286386172,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 20.546359185364768,
   "end_elevation_m": 24.65100647175094,
   "start_xy": [
    1229528.529,
    6082382.555
   ],
   "end_xy": [
    1229477.639521385,
    6082455.757098927
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 26.612042413612613,
   "start_distance_m": 275.0,
   "end_distance_m": 277.0,
   "midpoint_distance_m": 276.0,
   "start_elevation_m": 39.87170058094938,
   "end_elevation_m": 40.40394142922163,
   "start_xy": [
    1229367.85319975,
    6082550.344950592
   ],
   "end_xy": [
    1229367.1881323191,
    6082552.231133328
   ]
  },
  "max_3m": {
   "gradient_pct": 26.4045457606007,
   "start_distance_m": 275.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 276.5,
   "start_elevation_m": 39.87170058094938,
   "end_elevation_m": 40.6638369537674,
   "start_xy": [
    1229367.85319975,
    6082550.344950592
   ],
   "end_xy": [
    1229366.8555986036,
    6082553.174224695
   ]
  }
 },
 "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": 0.067,
   "obstruction_max_height_m": 8.74,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": []
 },
 "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-co3",
   "road_pbf": "block-batch-fr-co3.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_E1229-N6082_0m5@21LHDCorseVU-2025-04-02.tif"
  ],
  "calculated_at": "2026-09-25T00:53:15+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-co3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-co3",
  "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": [
   "E1229-N6082"
  ],
  "elevation_blocks": [
   "21LHDCorseVU@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_1229_6083_MNT_O_0M50_LAMB93_IGN78"
  ],
  "ign_missions": [
   "21LHDCorseVU"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1229_6083_MNT_O_0M50_LAMB93_IGN78": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 29,
   "stations_resolved": 29,
   "width_median_m": 7.25,
   "width_p10_m": 4.75,
   "width_min_m": 3.75,
   "width_max_m": 12.0,
   "bounded_share": 0.448,
   "unbounded_share": 0.552,
   "confidence_median": 0.0,
   "width_median_bounded_m": 7.0,
   "window_m": [
    269.0,
    294.0
   ],
   "width_at_max25_m": 7.0,
   "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": 29,
    "stations_resolved": 29,
    "width_median_m": 7.5,
    "width_p10_m": 2.5,
    "width_min_m": 1.0,
    "width_max_m": 12.0,
    "bounded_share": 0.793,
    "unbounded_share": 0.207,
    "confidence_median": 1.0,
    "width_median_bounded_m": 7.25,
    "window_m": [
     269.0,
     294.0
    ],
    "width_at_max25_m": 8.5,
    "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": "Zonza",
  "county": "Corse-du-Sud",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}