{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (45.8444, 2.6171)",
 "slug": "discovered-lane-45-8444-2-6171",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.7776309146127,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 61.0,
   "end_distance_m": 63.0,
   "start_elevation_m": 604.6555193442258,
   "end_elevation_m": 605.3510719625181,
   "min_gradient_pct": -9.795155012290024,
   "suppressed_max_gradient_pct": 146.38093143454967,
   "suppressed_location_m": [
    1.0,
    3.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.071266875706744,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 60.0,
   "end_distance_m": 63.0,
   "start_elevation_m": 604.4189339562469,
   "end_elevation_m": 605.3510719625181,
   "min_gradient_pct": -8.389689124942379,
   "suppressed_max_gradient_pct": 144.54035983400217,
   "suppressed_location_m": [
    0.0,
    3.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.33795470872019,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 58.0,
   "end_distance_m": 63.0,
   "start_elevation_m": 603.934174227082,
   "end_elevation_m": 605.3510719625181,
   "min_gradient_pct": -8.14734113761233,
   "suppressed_max_gradient_pct": 91.14414820614911,
   "suppressed_location_m": [
    0.0,
    5.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.198032477304423,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 154.0,
   "end_distance_m": 164.0,
   "start_elevation_m": 621.9303461220077,
   "end_elevation_m": 624.3501493697381,
   "min_gradient_pct": -7.90182006249438,
   "suppressed_max_gradient_pct": 45.87956694498871,
   "suppressed_location_m": [
    0.0,
    10.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.43482764754185,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 151.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 621.2538262534458,
   "end_elevation_m": 625.9407917829542,
   "min_gradient_pct": -7.572899194889828,
   "suppressed_max_gradient_pct": 25.44429596220141,
   "suppressed_location_m": [
    0.0,
    20.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.85000736256552,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 146.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 620.2282899423128,
   "end_elevation_m": 625.9407917829542,
   "min_gradient_pct": -7.413129114139338
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.605612378828027,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 247.0,
   "end_distance_m": 297.0,
   "start_elevation_m": 639.0562216265253,
   "end_elevation_m": 649.3590278159393,
   "min_gradient_pct": -6.844021328381132
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.74628803662665,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 71.0,
   "end_distance_m": 171.0,
   "start_elevation_m": 606.1945037463275,
   "end_elevation_m": 625.9407917829542,
   "min_gradient_pct": -5.450501178818627
  }
 ],
 "shape": {
  "ascent_concentration": 0.516,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 282.0,
  "shape_class": "stepped"
 },
 "length_m": 1244.630298418047,
 "start_elevation_m": 595.2420495605495,
 "end_elevation_m": 696.1396177551223,
 "endpoint_gain_m": 100.89756819457284,
 "overall_gradient_pct": 8.106629601000066,
 "accumulated_ascent_m": 109.32363820275884,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.33795470872019,
   "start_distance_m": 58.0,
   "end_distance_m": 63.0,
   "midpoint_distance_m": 60.5,
   "start_elevation_m": 603.934174227082,
   "end_elevation_m": 605.3510719625181,
   "start_xy": [
    670347.8865775196,
    6527207.980829354
   ],
   "end_xy": [
    670348.0452320989,
    6527202.983347116
   ]
  },
  "max_10m": {
   "gradient_pct": 24.198032477304423,
   "start_distance_m": 154.0,
   "end_distance_m": 164.0,
   "midpoint_distance_m": 159.0,
   "start_elevation_m": 621.9303461220077,
   "end_elevation_m": 624.3501493697381,
   "start_xy": [
    670282.1022623086,
    6527167.657119443
   ],
   "end_xy": [
    670272.1927018273,
    6527168.998987941
   ]
  },
  "max_20m": {
   "gradient_pct": 23.43482764754185,
   "start_distance_m": 151.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 161.0,
   "start_elevation_m": 621.2538262534458,
   "end_elevation_m": 625.9407917829542,
   "start_xy": [
    670285.075130453,
    6527167.254558893
   ],
   "end_xy": [
    670265.4794975463,
    6527170.8863124335
   ]
  },
  "max_25m": {
   "gradient_pct": 22.85000736256552,
   "start_distance_m": 146.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 158.5,
   "start_elevation_m": 620.2282899423128,
   "end_elevation_m": 625.9407917829542,
   "start_xy": [
    670290.0299106935,
    6527166.583624643
   ],
   "end_xy": [
    670265.4794975463,
    6527170.8863124335
   ]
  },
  "max_50m": {
   "gradient_pct": 20.605612378828027,
   "start_distance_m": 247.0,
   "end_distance_m": 297.0,
   "midpoint_distance_m": 272.0,
   "start_elevation_m": 639.0562216265253,
   "end_elevation_m": 649.3590278159393,
   "start_xy": [
    670289.750039938,
    6527237.60644909
   ],
   "end_xy": [
    670278.4905823627,
    6527286.204259547
   ]
  },
  "max_100m": {
   "gradient_pct": 19.74628803662665,
   "start_distance_m": 71.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 121.0,
   "start_elevation_m": 606.1945037463275,
   "end_elevation_m": 625.9407917829542,
   "start_xy": [
    670348.2990794256,
    6527194.987375534
   ],
   "end_xy": [
    670265.4794975463,
    6527170.8863124335
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -8.14734113761233,
   "start_distance_m": 721.0,
   "end_distance_m": 726.0,
   "midpoint_distance_m": 723.5,
   "start_elevation_m": 671.6635652385214,
   "end_elevation_m": 671.2561981816408,
   "start_xy": [
    670086.3352904506,
    6527618.009444565
   ],
   "end_xy": [
    670085.9292001773,
    6527622.992926349
   ]
  },
  "min_10m": {
   "gradient_pct": -7.90182006249438,
   "start_distance_m": 724.0,
   "end_distance_m": 734.0,
   "midpoint_distance_m": 729.0,
   "start_elevation_m": 671.4340730724133,
   "end_elevation_m": 670.6438910661639,
   "start_xy": [
    670086.0916362867,
    6527620.999533636
   ],
   "end_xy": [
    670085.763158265,
    6527630.960413009
   ]
  },
  "min_20m": {
   "gradient_pct": -7.572899194889828,
   "start_distance_m": 717.0,
   "end_distance_m": 737.0,
   "midpoint_distance_m": 727.0,
   "start_elevation_m": 671.9339833061699,
   "end_elevation_m": 670.419403467192,
   "start_xy": [
    670086.6601626693,
    6527614.022659138
   ],
   "end_xy": [
    670086.0819443911,
    6527633.943427492
   ]
  },
  "min_25m": {
   "gradient_pct": -7.413129114139338,
   "start_distance_m": 712.0,
   "end_distance_m": 737.0,
   "midpoint_distance_m": 724.5,
   "start_elevation_m": 672.2726857457268,
   "end_elevation_m": 670.419403467192,
   "start_xy": [
    670087.0964890544,
    6527609.045429529
   ],
   "end_xy": [
    670086.0819443911,
    6527633.943427492
   ]
  },
  "min_50m": {
   "gradient_pct": -6.844021328381132,
   "start_distance_m": 687.0,
   "end_distance_m": 737.0,
   "midpoint_distance_m": 712.0,
   "start_elevation_m": 673.8414141313825,
   "end_elevation_m": 670.419403467192,
   "start_xy": [
    670095.1147779323,
    6527585.366176089
   ],
   "end_xy": [
    670086.0819443911,
    6527633.943427492
   ]
  },
  "min_100m": {
   "gradient_pct": -5.450501178818627,
   "start_distance_m": 652.0,
   "end_distance_m": 752.0,
   "midpoint_distance_m": 702.0,
   "start_elevation_m": 675.2339946275264,
   "end_elevation_m": 669.7834934487078,
   "start_xy": [
    670106.3704579247,
    6527552.2254283205
   ],
   "end_xy": [
    670087.1955705548,
    6527648.779108645
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.7776309146127,
   "start_distance_m": 61.0,
   "end_distance_m": 63.0,
   "midpoint_distance_m": 62.0,
   "start_elevation_m": 604.6555193442258,
   "end_elevation_m": 605.3510719625181,
   "start_xy": [
    670347.9817702671,
    6527204.982340012
   ],
   "end_xy": [
    670348.0452320989,
    6527202.983347116
   ]
  },
  "max_3m": {
   "gradient_pct": 31.071266875706744,
   "start_distance_m": 60.0,
   "end_distance_m": 63.0,
   "midpoint_distance_m": 61.5,
   "start_elevation_m": 604.4189339562469,
   "end_elevation_m": 605.3510719625181,
   "start_xy": [
    670347.9500393514,
    6527205.98183646
   ],
   "end_xy": [
    670348.0452320989,
    6527202.983347116
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.017,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.284,
   "obstruction_max_height_m": 25.63,
   "flagged_windows_m": [
    5,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    0.0,
    20.0
   ]
  ],
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "1cc9fdcd6556a02163cb21acb2293cad3067d2a1",
   "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-mc4",
   "road_pbf": "block-batch-fr-mc4.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:af4eae1f5df9e232"
  },
  "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_E670-N6527_0m5@22LHD3KL-2025-09-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E670-N6528_0m5@22LHD3KL-2025-09-19.tif"
  ],
  "calculated_at": "2026-09-22T17:52:00+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc4",
  "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": [
   "E670-N6527",
   "E670-N6528"
  ],
  "elevation_blocks": [
   "22LHD3KL@2025-09-19"
  ],
  "ign_dalles": [
   "LHD_FXX_0670_6528_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0670_6529_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD3KL"
  ],
  "ign_editions": [
   "2025-09-19"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0670_6528_MNT_O_0M50_LAMB93_IGN69": "2025-09-19",
   "LHD_FXX_0670_6529_MNT_O_0M50_LAMB93_IGN69": "2025-09-19"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 3,
  "structure_mask_ranges_m": [
   [
    0.0,
    15.0
   ]
  ],
  "carriageway": {
   "stations": 56,
   "stations_resolved": 56,
   "width_median_m": 6.12,
   "width_p10_m": 4.12,
   "width_min_m": 1.25,
   "width_max_m": 12.0,
   "bounded_share": 0.232,
   "unbounded_share": 0.768,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.75,
   "window_m": [
    146.0,
    171.0
   ],
   "width_at_max25_m": 6.5,
   "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": 56,
    "stations_resolved": 56,
    "width_median_m": 4.5,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.732,
    "unbounded_share": 0.268,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.5,
    "window_m": [
     146.0,
     171.0
    ],
    "width_at_max25_m": 4.5,
    "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": "Combrailles",
  "county": "Puy-de-D\u00f4me",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}