{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (41.4094, 9.2141)",
 "slug": "discovered-lane-41-4094-9-2141",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 41.0402778877728,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 397.0,
   "end_distance_m": 399.0,
   "start_elevation_m": 37.67252803207368,
   "end_elevation_m": 38.493333589829135,
   "min_gradient_pct": -5.725042300226524
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 35.089977177193056,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 396.0,
   "end_distance_m": 399.0,
   "start_elevation_m": 37.44063427451334,
   "end_elevation_m": 38.493333589829135,
   "min_gradient_pct": -3.859117802841953
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 31.74297945622172,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 394.0,
   "end_distance_m": 399.0,
   "start_elevation_m": 36.90618461701805,
   "end_elevation_m": 38.493333589829135,
   "min_gradient_pct": -1.9515459042784666
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.58457416293651,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 394.0,
   "end_distance_m": 404.0,
   "start_elevation_m": 36.90618461701805,
   "end_elevation_m": 39.5646420333117,
   "min_gradient_pct": -0.29055060262879184
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.630578919793145,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 394.0,
   "end_distance_m": 414.0,
   "start_elevation_m": 36.90618461701805,
   "end_elevation_m": 41.83230040097668,
   "min_gradient_pct": 0.15968334384707905
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.185964195017135,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 389.0,
   "end_distance_m": 414.0,
   "start_elevation_m": 36.035809352222394,
   "end_elevation_m": 41.83230040097668,
   "min_gradient_pct": 0.4088086744616035
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.569980627578275,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 364.0,
   "end_distance_m": 414.0,
   "start_elevation_m": 32.04731008718754,
   "end_elevation_m": 41.83230040097668,
   "min_gradient_pct": 0.4334357750730283
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.530459979157797,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 314.0,
   "end_distance_m": 414.0,
   "start_elevation_m": 25.30184042181888,
   "end_elevation_m": 41.83230040097668,
   "min_gradient_pct": 1.5527243197962073
  }
 ],
 "shape": {
  "ascent_concentration": 0.417,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 89.0,
  "shape_class": "sustained"
 },
 "length_m": 414.35171077829364,
 "start_elevation_m": 2.1252343015569535,
 "end_elevation_m": 41.90652475978077,
 "endpoint_gain_m": 39.78129045822382,
 "overall_gradient_pct": 9.600851021829017,
 "accumulated_ascent_m": 40.48383202862613,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 31.74297945622172,
   "start_distance_m": 394.0,
   "end_distance_m": 399.0,
   "midpoint_distance_m": 396.5,
   "start_elevation_m": 36.90618461701805,
   "end_elevation_m": 38.493333589829135,
   "start_xy": [
    1220464.3696018565,
    6054719.984574274
   ],
   "end_xy": [
    1220466.280732408,
    6054724.604918418
   ]
  },
  "max_10m": {
   "gradient_pct": 26.58457416293651,
   "start_distance_m": 394.0,
   "end_distance_m": 404.0,
   "midpoint_distance_m": 399.0,
   "start_elevation_m": 36.90618461701805,
   "end_elevation_m": 39.5646420333117,
   "start_xy": [
    1220464.3696018565,
    6054719.984574274
   ],
   "end_xy": [
    1220468.1918629594,
    6054729.225262564
   ]
  },
  "max_20m": {
   "gradient_pct": 24.630578919793145,
   "start_distance_m": 394.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 404.0,
   "start_elevation_m": 36.90618461701805,
   "end_elevation_m": 41.83230040097668,
   "start_xy": [
    1220464.3696018565,
    6054719.984574274
   ],
   "end_xy": [
    1220466.3901150953,
    6054738.690318663
   ]
  },
  "max_25m": {
   "gradient_pct": 23.185964195017135,
   "start_distance_m": 389.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 401.5,
   "start_elevation_m": 36.035809352222394,
   "end_elevation_m": 41.83230040097668,
   "start_xy": [
    1220462.458471305,
    6054715.364230129
   ],
   "end_xy": [
    1220466.3901150953,
    6054738.690318663
   ]
  },
  "max_50m": {
   "gradient_pct": 19.569980627578275,
   "start_distance_m": 364.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 389.0,
   "start_elevation_m": 32.04731008718754,
   "end_elevation_m": 41.83230040097668,
   "start_xy": [
    1220447.8299720355,
    6054695.26452668
   ],
   "end_xy": [
    1220466.3901150953,
    6054738.690318663
   ]
  },
  "max_100m": {
   "gradient_pct": 16.530459979157797,
   "start_distance_m": 314.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 364.0,
   "start_elevation_m": 25.30184042181888,
   "end_elevation_m": 41.83230040097668,
   "start_xy": [
    1220464.2751580442,
    6054686.110954567
   ],
   "end_xy": [
    1220466.3901150953,
    6054738.690318663
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.9515459042784666,
   "start_distance_m": 57.0,
   "end_distance_m": 62.0,
   "midpoint_distance_m": 59.5,
   "start_elevation_m": 2.897309002153598,
   "end_elevation_m": 2.7997317069396748,
   "start_xy": [
    1220656.5520630018,
    6054595.92178127
   ],
   "end_xy": [
    1220656.077253476,
    6054600.899185806
   ]
  },
  "min_10m": {
   "gradient_pct": -0.29055060262879184,
   "start_distance_m": 57.0,
   "end_distance_m": 67.0,
   "midpoint_distance_m": 62.0,
   "start_elevation_m": 2.897309002153598,
   "end_elevation_m": 2.868253941890719,
   "start_xy": [
    1220656.5520630018,
    6054595.92178127
   ],
   "end_xy": [
    1220655.5319475655,
    6054605.8515216615
   ]
  },
  "min_20m": {
   "gradient_pct": 0.15968334384707905,
   "start_distance_m": 57.0,
   "end_distance_m": 77.0,
   "midpoint_distance_m": 67.0,
   "start_elevation_m": 2.897309002153598,
   "end_elevation_m": 2.929245670923014,
   "start_xy": [
    1220656.5520630018,
    6054595.92178127
   ],
   "end_xy": [
    1220648.6475983462,
    6054612.4459256185
   ]
  },
  "min_25m": {
   "gradient_pct": 0.4088086744616035,
   "start_distance_m": 49.0,
   "end_distance_m": 74.0,
   "midpoint_distance_m": 61.5,
   "start_elevation_m": 2.741425729411732,
   "end_elevation_m": 2.843627898027133,
   "start_xy": [
    1220656.2004369586,
    6054587.987825702
   ],
   "end_xy": [
    1220651.4806745127,
    6054611.459173656
   ]
  },
  "min_50m": {
   "gradient_pct": 0.4334357750730283,
   "start_distance_m": 25.0,
   "end_distance_m": 75.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 2.649857382301123,
   "end_elevation_m": 2.866575269837637,
   "start_xy": [
    1220652.6403334206,
    6054564.253343133
   ],
   "end_xy": [
    1220650.5363157904,
    6054611.788090977
   ]
  },
  "min_100m": {
   "gradient_pct": 1.5527243197962073,
   "start_distance_m": 2.0,
   "end_distance_m": 102.0,
   "midpoint_distance_m": 52.0,
   "start_elevation_m": 2.149003641201296,
   "end_elevation_m": 3.7017279609975033,
   "start_xy": [
    1220655.536587653,
    6054541.767755794
   ],
   "end_xy": [
    1220624.5164920609,
    6054609.95875864
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 41.0402778877728,
   "start_distance_m": 397.0,
   "end_distance_m": 399.0,
   "midpoint_distance_m": 398.0,
   "start_elevation_m": 37.67252803207368,
   "end_elevation_m": 38.493333589829135,
   "start_xy": [
    1220465.5162801873,
    6054722.756780761
   ],
   "end_xy": [
    1220466.280732408,
    6054724.604918418
   ]
  },
  "max_3m": {
   "gradient_pct": 35.089977177193056,
   "start_distance_m": 396.0,
   "end_distance_m": 399.0,
   "midpoint_distance_m": 397.5,
   "start_elevation_m": 37.44063427451334,
   "end_elevation_m": 38.493333589829135,
   "start_xy": [
    1220465.134054077,
    6054721.832711932
   ],
   "end_xy": [
    1220466.280732408,
    6054724.604918418
   ]
  }
 },
 "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": 11.39,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "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_E1220-N6054_0m5@21LHDCorseVU-2025-04-02.tif"
  ],
  "calculated_at": "2026-09-25T00:51:31+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": [
   "E1220-N6054"
  ],
  "elevation_blocks": [
   "21LHDCorseVU@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_1220_6055_MNT_O_0M50_LAMB93_IGN78"
  ],
  "ign_missions": [
   "21LHDCorseVU"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1220_6055_MNT_O_0M50_LAMB93_IGN78": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 23,
   "stations_resolved": 23,
   "width_median_m": 4.0,
   "width_p10_m": 1.3,
   "width_min_m": 1.0,
   "width_max_m": 8.75,
   "bounded_share": 0.261,
   "unbounded_share": 0.739,
   "confidence_median": 0.0,
   "width_median_bounded_m": 1.75,
   "window_m": [
    389.0,
    414.0
   ],
   "width_at_max25_m": 2.5,
   "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": 23,
    "stations_resolved": 23,
    "width_median_m": 2.25,
    "width_p10_m": 1.3,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.957,
    "unbounded_share": 0.043,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.12,
    "window_m": [
     389.0,
     414.0
    ],
    "width_at_max25_m": 2.0,
    "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": "Bonifacio / Bunifaziu",
  "county": "Corse-du-Sud",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}