{
 "ocl_version": "0.1.0",
 "name": "Discovered lane (44.7191, 2.4973)",
 "slug": "discovered-lane-44-7191-2-4973",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.050324483514032,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 12.0,
   "end_distance_m": 14.0,
   "start_elevation_m": 766.8858711928203,
   "end_elevation_m": 767.4268776824906,
   "min_gradient_pct": -10.718546778463178
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.750061150081212,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 11.0,
   "end_distance_m": 14.0,
   "start_elevation_m": 766.6243758479882,
   "end_elevation_m": 767.4268776824906,
   "min_gradient_pct": -8.994450981466192
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.820980978837724,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 9.0,
   "end_distance_m": 14.0,
   "start_elevation_m": 766.1358286335487,
   "end_elevation_m": 767.4268776824906,
   "min_gradient_pct": -6.101213493852811
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.38393360578857,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 4.0,
   "end_distance_m": 14.0,
   "start_elevation_m": 764.9884843219118,
   "end_elevation_m": 767.4268776824906,
   "min_gradient_pct": -0.5908851513402169
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.073693418809285,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 3.0,
   "end_distance_m": 23.0,
   "start_elevation_m": 764.7851464339717,
   "end_elevation_m": 769.3998851177336,
   "min_gradient_pct": 0.0703531010867664
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.757665171099234,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "start_elevation_m": 764.0850444594942,
   "end_elevation_m": 769.774460752269,
   "min_gradient_pct": 0.24393061344335365
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.106212169991977,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "start_elevation_m": 764.0850444594942,
   "end_elevation_m": 772.6381505444901,
   "min_gradient_pct": 2.98269351990848
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.496408088762564,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "start_elevation_m": 764.0850444594942,
   "end_elevation_m": 777.5814525482567,
   "min_gradient_pct": 6.1995578905589355
  }
 ],
 "shape": {
  "ascent_concentration": 0.406,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 51.0,
  "shape_class": "sustained"
 },
 "length_m": 221.69730528020716,
 "start_elevation_m": 764.0850444594942,
 "end_elevation_m": 786.3573708320394,
 "endpoint_gain_m": 22.272326372545194,
 "overall_gradient_pct": 10.046277443198873,
 "accumulated_ascent_m": 22.996666634177927,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.820980978837724,
   "start_distance_m": 9.0,
   "end_distance_m": 14.0,
   "midpoint_distance_m": 11.5,
   "start_elevation_m": 766.1358286335487,
   "end_elevation_m": 767.4268776824906,
   "start_xy": [
    660177.5327112941,
    6402200.364872981
   ],
   "end_xy": [
    660177.8831064574,
    6402205.3525801925
   ]
  },
  "max_10m": {
   "gradient_pct": 24.38393360578857,
   "start_distance_m": 4.0,
   "end_distance_m": 14.0,
   "midpoint_distance_m": 9.0,
   "start_elevation_m": 764.9884843219118,
   "end_elevation_m": 767.4268776824906,
   "start_xy": [
    660177.1823161307,
    6402195.377165769
   ],
   "end_xy": [
    660177.8831064574,
    6402205.3525801925
   ]
  },
  "max_20m": {
   "gradient_pct": 23.073693418809285,
   "start_distance_m": 3.0,
   "end_distance_m": 23.0,
   "midpoint_distance_m": 13.0,
   "start_elevation_m": 764.7851464339717,
   "end_elevation_m": 769.3998851177336,
   "start_xy": [
    660177.112237098,
    6402194.379624327
   ],
   "end_xy": [
    660178.5138177515,
    6402214.330453174
   ]
  },
  "max_25m": {
   "gradient_pct": 22.757665171099234,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 764.0850444594942,
   "end_elevation_m": 769.774460752269,
   "start_xy": [
    660176.902,
    6402191.387
   ],
   "end_xy": [
    660178.6539758169,
    6402216.325536058
   ]
  },
  "max_50m": {
   "gradient_pct": 17.106212169991977,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 764.0850444594942,
   "end_elevation_m": 772.6381505444901,
   "start_xy": [
    660176.902,
    6402191.387
   ],
   "end_xy": [
    660180.4059516337,
    6402241.264072117
   ]
  },
  "max_100m": {
   "gradient_pct": 13.496408088762564,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 764.0850444594942,
   "end_elevation_m": 777.5814525482567,
   "start_xy": [
    660176.902,
    6402191.387
   ],
   "end_xy": [
    660184.5127745621,
    6402291.07107894
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.101213493852811,
   "start_distance_m": 115.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 117.5,
   "start_elevation_m": 779.2807695757953,
   "end_elevation_m": 778.9757089011026,
   "start_xy": [
    660186.9212638052,
    6402305.876455652
   ],
   "end_xy": [
    660187.7240935529,
    6402310.811581221
   ]
  },
  "min_10m": {
   "gradient_pct": -0.5908851513402169,
   "start_distance_m": 134.0,
   "end_distance_m": 144.0,
   "midpoint_distance_m": 139.0,
   "start_elevation_m": 780.1843593317614,
   "end_elevation_m": 780.1252708166273,
   "start_xy": [
    660189.9720168465,
    6402324.629932819
   ],
   "end_xy": [
    660191.577676342,
    6402334.5001839595
   ]
  },
  "min_20m": {
   "gradient_pct": 0.0703531010867664,
   "start_distance_m": 129.0,
   "end_distance_m": 149.0,
   "midpoint_distance_m": 139.0,
   "start_elevation_m": 780.1504681250753,
   "end_elevation_m": 780.1645387452927,
   "start_xy": [
    660189.1691870989,
    6402319.694807248
   ],
   "end_xy": [
    660192.3805060897,
    6402339.43530953
   ]
  },
  "min_25m": {
   "gradient_pct": 0.24393061344335365,
   "start_distance_m": 129.0,
   "end_distance_m": 154.0,
   "midpoint_distance_m": 141.5,
   "start_elevation_m": 780.1504681250753,
   "end_elevation_m": 780.2114507784362,
   "start_xy": [
    660189.1691870989,
    6402319.694807248
   ],
   "end_xy": [
    660192.9180614325,
    6402344.400741576
   ]
  },
  "min_50m": {
   "gradient_pct": 2.98269351990848,
   "start_distance_m": 115.0,
   "end_distance_m": 165.0,
   "midpoint_distance_m": 140.0,
   "start_elevation_m": 779.2807695757953,
   "end_elevation_m": 780.7721163357495,
   "start_xy": [
    660186.9212638052,
    6402305.876455652
   ],
   "end_xy": [
    660193.6461809597,
    6402355.376617029
   ]
  },
  "min_100m": {
   "gradient_pct": 6.1995578905589355,
   "start_distance_m": 68.0,
   "end_distance_m": 168.0,
   "midpoint_distance_m": 118.0,
   "start_elevation_m": 774.8104580539837,
   "end_elevation_m": 781.0100159445426,
   "start_xy": [
    660181.6673742218,
    6402259.219818079
   ],
   "end_xy": [
    660193.8447590125,
    6402358.370037607
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.050324483514032,
   "start_distance_m": 12.0,
   "end_distance_m": 14.0,
   "midpoint_distance_m": 13.0,
   "start_elevation_m": 766.8858711928203,
   "end_elevation_m": 767.4268776824906,
   "start_xy": [
    660177.742948392,
    6402203.357497308
   ],
   "end_xy": [
    660177.8831064574,
    6402205.3525801925
   ]
  },
  "max_3m": {
   "gradient_pct": 26.750061150081212,
   "start_distance_m": 11.0,
   "end_distance_m": 14.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 766.6243758479882,
   "end_elevation_m": 767.4268776824906,
   "start_xy": [
    660177.6728693594,
    6402202.359955866
   ],
   "end_xy": [
    660177.8831064574,
    6402205.3525801925
   ]
  }
 },
 "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": 0.395,
   "obstruction_max_height_m": 19.66,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "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-mc3",
   "road_pbf": "block-batch-fr-mc3.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_E660-N6402_0m5@22LHD3KN-2025-01-29.tif"
  ],
  "calculated_at": "2026-09-22T16:06:24+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc3",
  "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": [
   "E660-N6402"
  ],
  "elevation_blocks": [
   "22LHD3KN@2025-01-29"
  ],
  "ign_dalles": [
   "LHD_FXX_0660_6403_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD3KN"
  ],
  "ign_editions": [
   "2025-01-29"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0660_6403_MNT_O_0M50_LAMB93_IGN69": "2025-01-29"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 13,
   "stations_resolved": 13,
   "width_median_m": 4.5,
   "width_p10_m": 3.0,
   "width_min_m": 2.75,
   "width_max_m": 6.25,
   "bounded_share": 0.231,
   "unbounded_share": 0.769,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.5,
   "window_m": [
    0.0,
    25.0
   ],
   "width_at_max25_m": 4.12,
   "window_stations": 6,
   "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": 13,
    "stations_resolved": 13,
    "width_median_m": 3.25,
    "width_p10_m": 0.6,
    "width_min_m": 0.5,
    "width_max_m": 9.25,
    "bounded_share": 0.923,
    "unbounded_share": 0.077,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.88,
    "window_m": [
     0.0,
     25.0
    ],
    "width_at_max25_m": 1.75,
    "window_stations": 6,
    "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": "Montsalvy",
  "county": "Cantal",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}