{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (41.5579, 9.3157)",
 "slug": "discovered-lane-41-5579-9-3157",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.491562788307686,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 91.0,
   "end_distance_m": 93.0,
   "start_elevation_m": 12.295063191733645,
   "end_elevation_m": 12.784894447499799,
   "min_gradient_pct": -10.878989733468991
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.66140547241938,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 90.0,
   "end_distance_m": 93.0,
   "start_elevation_m": 12.075052283327217,
   "end_elevation_m": 12.784894447499799,
   "min_gradient_pct": -10.614706852747583
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.880188055699975,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 90.0,
   "end_distance_m": 95.0,
   "start_elevation_m": 12.075052283327217,
   "end_elevation_m": 13.219061686112216,
   "min_gradient_pct": -6.954354198237382
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.498729918911824,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 83.0,
   "end_distance_m": 93.0,
   "start_elevation_m": 10.535021455608616,
   "end_elevation_m": 12.784894447499799,
   "min_gradient_pct": -0.9296230317028176
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.8374380400891,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 75.0,
   "end_distance_m": 95.0,
   "start_elevation_m": 8.851574078094396,
   "end_elevation_m": 13.219061686112216,
   "min_gradient_pct": -0.274233287593999
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.54912844681175,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 68.0,
   "end_distance_m": 93.0,
   "start_elevation_m": 7.397612335796861,
   "end_elevation_m": 12.784894447499799,
   "min_gradient_pct": 0.14783505647439732
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.91774168838262,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 64.0,
   "end_distance_m": 114.0,
   "start_elevation_m": 6.6071376972229245,
   "end_elevation_m": 16.566008541414234,
   "min_gradient_pct": 2.3677535848822107
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.187157632733978,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 53.0,
   "end_distance_m": 153.0,
   "start_elevation_m": 4.976490516510962,
   "end_elevation_m": 22.163648149244942,
   "min_gradient_pct": 6.219292956975579
  }
 ],
 "shape": {
  "ascent_concentration": 0.322,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 109.0,
  "shape_class": "sustained"
 },
 "length_m": 789.7661515292856,
 "start_elevation_m": 3.4926997611875104,
 "end_elevation_m": 86.21543460391413,
 "endpoint_gain_m": 82.72273484272662,
 "overall_gradient_pct": 10.474332773384141,
 "accumulated_ascent_m": 83.49692780997248,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.880188055699975,
   "start_distance_m": 90.0,
   "end_distance_m": 95.0,
   "midpoint_distance_m": 92.5,
   "start_elevation_m": 12.075052283327217,
   "end_elevation_m": 13.219061686112216,
   "start_xy": [
    1227863.2805278592,
    6071583.422913511
   ],
   "end_xy": [
    1227861.3562534782,
    6071588.0377990035
   ]
  },
  "max_10m": {
   "gradient_pct": 22.498729918911824,
   "start_distance_m": 83.0,
   "end_distance_m": 93.0,
   "midpoint_distance_m": 88.0,
   "start_elevation_m": 10.535021455608616,
   "end_elevation_m": 12.784894447499799,
   "start_xy": [
    1227865.974511993,
    6071576.9620738225
   ],
   "end_xy": [
    1227862.1259632306,
    6071586.191844807
   ]
  },
  "max_20m": {
   "gradient_pct": 21.8374380400891,
   "start_distance_m": 75.0,
   "end_distance_m": 95.0,
   "midpoint_distance_m": 85.0,
   "start_elevation_m": 8.851574078094396,
   "end_elevation_m": 13.219061686112216,
   "start_xy": [
    1227869.053351003,
    6071569.578257035
   ],
   "end_xy": [
    1227861.3562534782,
    6071588.0377990035
   ]
  },
  "max_25m": {
   "gradient_pct": 21.54912844681175,
   "start_distance_m": 68.0,
   "end_distance_m": 93.0,
   "midpoint_distance_m": 80.5,
   "start_elevation_m": 7.397612335796861,
   "end_elevation_m": 12.784894447499799,
   "start_xy": [
    1227871.7473351366,
    6071563.117417346
   ],
   "end_xy": [
    1227862.1259632306,
    6071586.191844807
   ]
  },
  "max_50m": {
   "gradient_pct": 19.91774168838262,
   "start_distance_m": 64.0,
   "end_distance_m": 114.0,
   "midpoint_distance_m": 89.0,
   "start_elevation_m": 6.6071376972229245,
   "end_elevation_m": 16.566008541414234,
   "start_xy": [
    1227873.2867546414,
    6071559.425508953
   ],
   "end_xy": [
    1227854.0440108296,
    6071605.574363874
   ]
  },
  "max_100m": {
   "gradient_pct": 17.187157632733978,
   "start_distance_m": 53.0,
   "end_distance_m": 153.0,
   "midpoint_distance_m": 103.0,
   "start_elevation_m": 4.976490516510962,
   "end_elevation_m": 22.163648149244942,
   "start_xy": [
    1227877.5201582802,
    6071549.27276087
   ],
   "end_xy": [
    1227839.3163470747,
    6071641.682606436
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.954354198237382,
   "start_distance_m": 186.0,
   "end_distance_m": 191.0,
   "midpoint_distance_m": 188.5,
   "start_elevation_m": 25.243140307121795,
   "end_elevation_m": 24.895422597209926,
   "start_xy": [
    1227826.477831904,
    6071671.94452045
   ],
   "end_xy": [
    1227823.277930656,
    6071675.78192211
   ]
  },
  "min_10m": {
   "gradient_pct": -0.9296230317028176,
   "start_distance_m": 653.0,
   "end_distance_m": 663.0,
   "midpoint_distance_m": 658.0,
   "start_elevation_m": 68.57867522575583,
   "end_elevation_m": 68.48571292258555,
   "start_xy": [
    1227830.8683384818,
    6071907.592996084
   ],
   "end_xy": [
    1227834.2513885105,
    6071916.948789286
   ]
  },
  "min_20m": {
   "gradient_pct": -0.274233287593999,
   "start_distance_m": 1.0,
   "end_distance_m": 21.0,
   "midpoint_distance_m": 11.0,
   "start_elevation_m": 3.498691863511922,
   "end_elevation_m": 3.443845205993122,
   "start_xy": [
    1227873.1822719967,
    6071499.799232894
   ],
   "end_xy": [
    1227880.367711932,
    6071518.463890751
   ]
  },
  "min_25m": {
   "gradient_pct": 0.14783505647439732,
   "start_distance_m": 1.0,
   "end_distance_m": 26.0,
   "midpoint_distance_m": 13.5,
   "start_elevation_m": 3.498691863511922,
   "end_elevation_m": 3.5356506276305213,
   "start_xy": [
    1227873.1822719967,
    6071499.799232894
   ],
   "end_xy": [
    1227881.834944997,
    6071523.2093260065
   ]
  },
  "min_50m": {
   "gradient_pct": 2.3677535848822107,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 3.4926997611875104,
   "end_elevation_m": 4.676576553628616,
   "start_xy": [
    1227872.823,
    6071498.866
   ],
   "end_xy": [
    1227878.6747229088,
    6071546.503829574
   ]
  },
  "min_100m": {
   "gradient_pct": 6.219292956975579,
   "start_distance_m": 567.0,
   "end_distance_m": 667.0,
   "midpoint_distance_m": 617.0,
   "start_elevation_m": 62.430172119087246,
   "end_elevation_m": 68.64946507606282,
   "start_xy": [
    1227794.4164992662,
    6071841.599171156
   ],
   "end_xy": [
    1227833.4232484328,
    6071920.862123416
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.491562788307686,
   "start_distance_m": 91.0,
   "end_distance_m": 93.0,
   "midpoint_distance_m": 92.0,
   "start_elevation_m": 12.295063191733645,
   "end_elevation_m": 12.784894447499799,
   "start_xy": [
    1227862.895672983,
    6071584.3458906105
   ],
   "end_xy": [
    1227862.1259632306,
    6071586.191844807
   ]
  },
  "max_3m": {
   "gradient_pct": 23.66140547241938,
   "start_distance_m": 90.0,
   "end_distance_m": 93.0,
   "midpoint_distance_m": 91.5,
   "start_elevation_m": 12.075052283327217,
   "end_elevation_m": 12.784894447499799,
   "start_xy": [
    1227863.2805278592,
    6071583.422913511
   ],
   "end_xy": [
    1227862.1259632306,
    6071586.191844807
   ]
  }
 },
 "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": 0.155,
   "obstruction_max_height_m": 10.58,
   "flagged_windows_m": []
  },
  "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_E1227-N6071_0m5@21LHDCorseVU-2025-04-02.tif"
  ],
  "calculated_at": "2026-09-25T00:51:08+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": [
   "E1227-N6071"
  ],
  "elevation_blocks": [
   "21LHDCorseVU@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_1227_6072_MNT_O_0M50_LAMB93_IGN78"
  ],
  "ign_missions": [
   "21LHDCorseVU"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1227_6072_MNT_O_0M50_LAMB93_IGN78": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 38,
   "stations_resolved": 38,
   "width_median_m": 5.0,
   "width_p10_m": 3.75,
   "width_min_m": 2.75,
   "width_max_m": 11.75,
   "bounded_share": 0.289,
   "unbounded_share": 0.711,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.0,
   "window_m": [
    68.0,
    93.0
   ],
   "width_at_max25_m": 5.5,
   "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": 38,
    "stations_resolved": 38,
    "width_median_m": 4.62,
    "width_p10_m": 1.6,
    "width_min_m": 0.5,
    "width_max_m": 9.5,
    "bounded_share": 1.0,
    "unbounded_share": 0.0,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.62,
    "window_m": [
     68.0,
     93.0
    ],
    "width_at_max25_m": 6.75,
    "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": "Porto-Vecchio",
  "county": "Corse-du-Sud",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}