{
 "ocl_version": "0.1.0",
 "name": "Chemin de Bahuque",
 "slug": "chemin-de-bahuque",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 28.142421637866022,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 103.0,
   "end_distance_m": 105.0,
   "start_elevation_m": 59.258867871278625,
   "end_elevation_m": 59.821716304035945,
   "min_gradient_pct": -4.360668288182978
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.63985779470346,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 103.0,
   "end_distance_m": 106.0,
   "start_elevation_m": 59.258867871278625,
   "end_elevation_m": 60.08806360511973,
   "min_gradient_pct": -3.802480119905738
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.059840068057554,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 115.0,
   "end_distance_m": 120.0,
   "start_elevation_m": 62.16044885256893,
   "end_elevation_m": 63.46344085597181,
   "min_gradient_pct": -3.741444372191438
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.874456247839376,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 88.0,
   "end_distance_m": 98.0,
   "start_elevation_m": 55.73896430979131,
   "end_elevation_m": 58.226409934575244,
   "min_gradient_pct": -3.436848393399856
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.420190695260047,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 102.0,
   "end_distance_m": 122.0,
   "start_elevation_m": 59.020092495441965,
   "end_elevation_m": 63.904130634493974,
   "min_gradient_pct": -1.7066167921947084
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.01106794093434,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 83.0,
   "end_distance_m": 108.0,
   "start_elevation_m": 54.55844523945113,
   "end_elevation_m": 60.561212224684716,
   "min_gradient_pct": -0.750168448666443
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 23.50062222888818,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 83.0,
   "end_distance_m": 133.0,
   "start_elevation_m": 54.55844523945113,
   "end_elevation_m": 66.30875635389522,
   "min_gradient_pct": 5.16330814687808
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 21.195949040560485,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 58.0,
   "end_distance_m": 158.0,
   "start_elevation_m": 49.877832386216745,
   "end_elevation_m": 71.07378142677723,
   "min_gradient_pct": 6.864422736857904
  }
 ],
 "shape": {
  "ascent_concentration": 0.418,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 142.0,
  "shape_class": "sustained"
 },
 "length_m": 528.1842180463456,
 "start_elevation_m": 45.48051274663074,
 "end_elevation_m": 106.24749871374888,
 "endpoint_gain_m": 60.766985967118146,
 "overall_gradient_pct": 11.504884828229786,
 "accumulated_ascent_m": 61.36530035489837,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.059840068057554,
   "start_distance_m": 115.0,
   "end_distance_m": 120.0,
   "midpoint_distance_m": 117.5,
   "start_elevation_m": 62.16044885256893,
   "end_elevation_m": 63.46344085597181,
   "start_xy": [
    382067.208606897,
    6270579.920585852
   ],
   "end_xy": [
    382066.40418003907,
    6270574.985720359
   ]
  },
  "max_10m": {
   "gradient_pct": 24.874456247839376,
   "start_distance_m": 88.0,
   "end_distance_m": 98.0,
   "midpoint_distance_m": 93.0,
   "start_elevation_m": 55.73896430979131,
   "end_elevation_m": 58.226409934575244,
   "start_xy": [
    382076.2475961579,
    6270604.924001706
   ],
   "end_xy": [
    382071.3452327773,
    6270596.208106268
   ]
  },
  "max_20m": {
   "gradient_pct": 24.420190695260047,
   "start_distance_m": 102.0,
   "end_distance_m": 122.0,
   "midpoint_distance_m": 112.0,
   "start_elevation_m": 59.020092495441965,
   "end_elevation_m": 63.904130634493974,
   "start_xy": [
    382069.384287425,
    6270592.721748093
   ],
   "end_xy": [
    382066.0824092959,
    6270573.011774162
   ]
  },
  "max_25m": {
   "gradient_pct": 24.01106794093434,
   "start_distance_m": 83.0,
   "end_distance_m": 108.0,
   "midpoint_distance_m": 95.5,
   "start_elevation_m": 54.55844523945113,
   "end_elevation_m": 60.561212224684716,
   "start_xy": [
    382078.75323834666,
    6270609.235898744
   ],
   "end_xy": [
    382068.33480449807,
    6270586.8293975415
   ]
  },
  "max_50m": {
   "gradient_pct": 23.50062222888818,
   "start_distance_m": 83.0,
   "end_distance_m": 133.0,
   "midpoint_distance_m": 108.0,
   "start_elevation_m": 54.55844523945113,
   "end_elevation_m": 66.30875635389522,
   "start_xy": [
    382078.75323834666,
    6270609.235898744
   ],
   "end_xy": [
    382066.32160806714,
    6270562.124985841
   ]
  },
  "max_100m": {
   "gradient_pct": 21.195949040560485,
   "start_distance_m": 58.0,
   "end_distance_m": 158.0,
   "midpoint_distance_m": 108.0,
   "start_elevation_m": 49.877832386216745,
   "end_elevation_m": 71.07378142677723,
   "start_xy": [
    382096.6362996533,
    6270626.052196655
   ],
   "end_xy": [
    382077.5942528053,
    6270540.697548156
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.741444372191438,
   "start_distance_m": 521.0,
   "end_distance_m": 526.0,
   "midpoint_distance_m": 523.5,
   "start_elevation_m": 106.51437015277187,
   "end_elevation_m": 106.3272979341623,
   "start_xy": [
    382021.75394396036,
    6270298.492280762
   ],
   "end_xy": [
    382016.9963322647,
    6270300.030178988
   ]
  },
  "min_10m": {
   "gradient_pct": -3.436848393399856,
   "start_distance_m": 518.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 523.0,
   "start_elevation_m": 106.59817168369294,
   "end_elevation_m": 106.25448684435295,
   "start_xy": [
    382024.6080450254,
    6270297.56852756
   ],
   "end_xy": [
    382015.09328758635,
    6270300.645338278
   ]
  },
  "min_20m": {
   "gradient_pct": -1.7066167921947084,
   "start_distance_m": 508.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 518.0,
   "start_elevation_m": 106.5958102027919,
   "end_elevation_m": 106.25448684435295,
   "start_xy": [
    382033.0105807912,
    6270292.168365287
   ],
   "end_xy": [
    382015.09328758635,
    6270300.645338278
   ]
  },
  "min_25m": {
   "gradient_pct": -0.750168448666443,
   "start_distance_m": 503.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 515.5,
   "start_elevation_m": 106.44202895651956,
   "end_elevation_m": 106.25448684435295,
   "start_xy": [
    382036.9122250595,
    6270289.041518312
   ],
   "end_xy": [
    382015.09328758635,
    6270300.645338278
   ]
  },
  "min_50m": {
   "gradient_pct": 5.16330814687808,
   "start_distance_m": 478.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 503.0,
   "start_elevation_m": 103.67283277091391,
   "end_elevation_m": 106.25448684435295,
   "start_xy": [
    382056.70980784425,
    6270273.804150308
   ],
   "end_xy": [
    382015.09328758635,
    6270300.645338278
   ]
  },
  "min_100m": {
   "gradient_pct": 6.864422736857904,
   "start_distance_m": 428.0,
   "end_distance_m": 528.0,
   "midpoint_distance_m": 478.0,
   "start_elevation_m": 99.39006410749505,
   "end_elevation_m": 106.25448684435295,
   "start_xy": [
    382091.3481534878,
    6270305.660728323
   ],
   "end_xy": [
    382015.09328758635,
    6270300.645338278
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 28.142421637866022,
   "start_distance_m": 103.0,
   "end_distance_m": 105.0,
   "midpoint_distance_m": 104.0,
   "start_elevation_m": 59.258867871278625,
   "end_elevation_m": 59.821716304035945,
   "start_xy": [
    382069.139231356,
    6270591.764263034
   ],
   "end_xy": [
    382068.8174606128,
    6270589.790316837
   ]
  },
  "max_3m": {
   "gradient_pct": 27.63985779470346,
   "start_distance_m": 103.0,
   "end_distance_m": 106.0,
   "midpoint_distance_m": 104.5,
   "start_elevation_m": 59.258867871278625,
   "end_elevation_m": 60.08806360511973,
   "start_xy": [
    382069.139231356,
    6270591.764263034
   ],
   "end_xy": [
    382068.6565752412,
    6270588.803343738
   ]
  }
 },
 "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": 0.23,
   "obstruction_max_height_m": 21.02,
   "flagged_windows_m": [
    2,
    3,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "06fa4c370391597f015858e97dcf01ca2f5b3640",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:0048c2bbb24ab95e",
   "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-pyr1",
   "road_pbf": "block-batch-fr-pyr1.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:c54ac68b3f57b41b"
  },
  "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_E381-N6270_0m5@21LHD1EQ-2025-09-26.tif",
   "data/cache/fr/ign-lidarhd_dtm_E382-N6270_0m5@21LHD1EQ-2025-09-26.tif"
  ],
  "calculated_at": "2026-09-20T05:57:09+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pyr1",
  "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": [
   "E381-N6270",
   "E382-N6270"
  ],
  "elevation_blocks": [
   "21LHD1EQ@2025-09-26"
  ],
  "ign_dalles": [
   "LHD_FXX_0381_6271_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0382_6271_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD1EQ"
  ],
  "ign_editions": [
   "2025-09-26"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0381_6271_MNT_O_0M50_LAMB93_IGN69": "2025-09-26",
   "LHD_FXX_0382_6271_MNT_O_0M50_LAMB93_IGN69": "2025-09-26"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 28,
   "stations_resolved": 28,
   "width_median_m": 4.62,
   "width_p10_m": 2.25,
   "width_min_m": 1.5,
   "width_max_m": 12.0,
   "bounded_share": 0.429,
   "unbounded_share": 0.571,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.5,
   "window_m": [
    83.0,
    108.0
   ],
   "width_at_max25_m": 2.75,
   "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": 28,
    "stations_resolved": 28,
    "width_median_m": 2.38,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.857,
    "unbounded_share": 0.143,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.12,
    "window_m": [
     83.0,
     108.0
    ],
    "width_at_max25_m": 1.75,
    "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": "Salies-de-B\u00e9arn",
  "county": "Pyr\u00e9n\u00e9es-Atlantiques",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}