{
 "ocl_version": "0.1.0",
 "name": "Chemin du Herre",
 "slug": "chemin-du-herre",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.89572528276119,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 626.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 306.3275171743745,
   "end_elevation_m": 307.00543168002974,
   "min_gradient_pct": -7.9946355794788815
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.541970289302373,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 625.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 306.0891725713507,
   "end_elevation_m": 307.00543168002974,
   "min_gradient_pct": -7.237994167185964
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.464220320569893,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 623.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 305.68222066400125,
   "end_elevation_m": 307.00543168002974,
   "min_gradient_pct": -5.739796520172149
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.578200150765383,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 618.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 304.8476116649532,
   "end_elevation_m": 307.00543168002974,
   "min_gradient_pct": -3.768283523307332
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.420755815107725,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 608.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 302.9212805170082,
   "end_elevation_m": 307.00543168002974,
   "min_gradient_pct": -2.988044154283216
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.175585275104368,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 603.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 301.96153536125365,
   "end_elevation_m": 307.00543168002974,
   "min_gradient_pct": -2.922463116568906
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.409486836921133,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 578.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 297.3006882615692,
   "end_elevation_m": 307.00543168002974,
   "min_gradient_pct": -2.5911296961359085
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.68334394730607,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 551.0,
   "end_distance_m": 651.0,
   "start_elevation_m": 292.8180509588201,
   "end_elevation_m": 310.50139490612617,
   "min_gradient_pct": -2.2767464296737785
  }
 ],
 "shape": {
  "ascent_concentration": 0.508,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 191.0,
  "shape_class": "stepped"
 },
 "length_m": 1455.8240151519515,
 "start_elevation_m": 237.64429894104126,
 "end_elevation_m": 327.56719717407583,
 "endpoint_gain_m": 89.92289823303457,
 "overall_gradient_pct": 6.176769808516236,
 "accumulated_ascent_m": 95.42913116193424,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.464220320569893,
   "start_distance_m": 623.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 625.5,
   "start_elevation_m": 305.68222066400125,
   "end_elevation_m": 307.00543168002974,
   "start_xy": [
    447814.07995121065,
    6263496.706924046
   ],
   "end_xy": [
    447809.1711455151,
    6263497.657516832
   ]
  },
  "max_10m": {
   "gradient_pct": 21.578200150765383,
   "start_distance_m": 618.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 623.0,
   "start_elevation_m": 304.8476116649532,
   "end_elevation_m": 307.00543168002974,
   "start_xy": [
    447818.9887569062,
    6263495.756331261
   ],
   "end_xy": [
    447809.1711455151,
    6263497.657516832
   ]
  },
  "max_20m": {
   "gradient_pct": 20.420755815107725,
   "start_distance_m": 608.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 618.0,
   "start_elevation_m": 302.9212805170082,
   "end_elevation_m": 307.00543168002974,
   "start_xy": [
    447828.80636829726,
    6263493.855145691
   ],
   "end_xy": [
    447809.1711455151,
    6263497.657516832
   ]
  },
  "max_25m": {
   "gradient_pct": 20.175585275104368,
   "start_distance_m": 603.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 615.5,
   "start_elevation_m": 301.96153536125365,
   "end_elevation_m": 307.00543168002974,
   "start_xy": [
    447833.7151739928,
    6263492.904552906
   ],
   "end_xy": [
    447809.1711455151,
    6263497.657516832
   ]
  },
  "max_50m": {
   "gradient_pct": 19.409486836921133,
   "start_distance_m": 578.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 603.0,
   "start_elevation_m": 297.3006882615692,
   "end_elevation_m": 307.00543168002974,
   "start_xy": [
    447858.27091783786,
    6263488.212539396
   ],
   "end_xy": [
    447809.1711455151,
    6263497.657516832
   ]
  },
  "max_100m": {
   "gradient_pct": 17.68334394730607,
   "start_distance_m": 551.0,
   "end_distance_m": 651.0,
   "midpoint_distance_m": 601.0,
   "start_elevation_m": 292.8180509588201,
   "end_elevation_m": 310.50139490612617,
   "start_xy": [
    447884.6090126577,
    6263482.521273553
   ],
   "end_xy": [
    447787.13924505265,
    6263504.074047459
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.739796520172149,
   "start_distance_m": 959.0,
   "end_distance_m": 964.0,
   "midpoint_distance_m": 961.5,
   "start_elevation_m": 317.9895088990702,
   "end_elevation_m": 317.7025190730616,
   "start_xy": [
    447493.89172169904,
    6263505.051689157
   ],
   "end_xy": [
    447489.00997988594,
    6263503.9706725655
   ]
  },
  "min_10m": {
   "gradient_pct": -3.768283523307332,
   "start_distance_m": 959.0,
   "end_distance_m": 969.0,
   "midpoint_distance_m": 964.0,
   "start_elevation_m": 317.9895088990702,
   "end_elevation_m": 317.61268054673945,
   "start_xy": [
    447493.89172169904,
    6263505.051689157
   ],
   "end_xy": [
    447484.1282380729,
    6263502.889655975
   ]
  },
  "min_20m": {
   "gradient_pct": -2.988044154283216,
   "start_distance_m": 959.0,
   "end_distance_m": 979.0,
   "midpoint_distance_m": 969.0,
   "start_elevation_m": 317.9895088990702,
   "end_elevation_m": 317.39190006821354,
   "start_xy": [
    447493.89172169904,
    6263505.051689157
   ],
   "end_xy": [
    447474.36475444684,
    6263500.727622792
   ]
  },
  "min_25m": {
   "gradient_pct": -2.922463116568906,
   "start_distance_m": 958.0,
   "end_distance_m": 983.0,
   "midpoint_distance_m": 970.5,
   "start_elevation_m": 318.00044776715225,
   "end_elevation_m": 317.26983198801,
   "start_xy": [
    447494.8680700616,
    6263505.267892475
   ],
   "end_xy": [
    447470.4593609964,
    6263499.862809518
   ]
  },
  "min_50m": {
   "gradient_pct": -2.5911296961359085,
   "start_distance_m": 959.0,
   "end_distance_m": 1009.0,
   "midpoint_distance_m": 984.0,
   "start_elevation_m": 317.9895088990702,
   "end_elevation_m": 316.69394405100223,
   "start_xy": [
    447493.89172169904,
    6263505.051689157
   ],
   "end_xy": [
    447445.07427453686,
    6263494.2416543495
   ]
  },
  "min_100m": {
   "gradient_pct": -2.2767464296737785,
   "start_distance_m": 935.0,
   "end_distance_m": 1035.0,
   "midpoint_distance_m": 985.0,
   "start_elevation_m": 318.3281226757439,
   "end_elevation_m": 316.0513762460701,
   "start_xy": [
    447517.3778146173,
    6263509.978313944
   ],
   "end_xy": [
    447419.67665540497,
    6263488.686342884
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.89572528276119,
   "start_distance_m": 626.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 627.0,
   "start_elevation_m": 306.3275171743745,
   "end_elevation_m": 307.00543168002974,
   "start_xy": [
    447811.1346677933,
    6263497.277279718
   ],
   "end_xy": [
    447809.1711455151,
    6263497.657516832
   ]
  },
  "max_3m": {
   "gradient_pct": 30.541970289302373,
   "start_distance_m": 625.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 626.5,
   "start_elevation_m": 306.0891725713507,
   "end_elevation_m": 307.00543168002974,
   "start_xy": [
    447812.1164289324,
    6263497.087161161
   ],
   "end_xy": [
    447809.1711455151,
    6263497.657516832
   ]
  }
 },
 "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": 0.281,
   "obstruction_max_height_m": 18.08,
   "flagged_windows_m": [
    2,
    3,
    5,
    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-pyr2",
   "road_pbf": "block-batch-fr-pyr2.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_E447-N6263_0m5@21LHD1GQ-2025-04-11.tif",
   "data/cache/fr/ign-lidarhd_dtm_E448-N6263_0m5@21LHD1GQ-2026-03-20.tif"
  ],
  "calculated_at": "2026-09-20T07:03:07+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pyr2",
  "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": [
   "E447-N6263",
   "E448-N6263"
  ],
  "elevation_blocks": [
   "21LHD1GQ@2025-04-11",
   "21LHD1GQ@2026-03-20"
  ],
  "ign_dalles": [
   "LHD_FXX_0447_6264_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0448_6264_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD1GQ"
  ],
  "ign_editions": [
   "2025-04-11",
   "2026-03-20"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0447_6264_MNT_O_0M50_LAMB93_IGN69": "2025-04-11",
   "LHD_FXX_0448_6264_MNT_O_0M50_LAMB93_IGN69": "2026-03-20"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 65,
   "stations_resolved": 65,
   "width_median_m": 5.75,
   "width_p10_m": 3.0,
   "width_min_m": 1.25,
   "width_max_m": 12.0,
   "bounded_share": 0.062,
   "unbounded_share": 0.938,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.12,
   "window_m": [
    603.0,
    628.0
   ],
   "width_at_max25_m": 5.25,
   "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": 65,
    "stations_resolved": 65,
    "width_median_m": 5.0,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.831,
    "unbounded_share": 0.169,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.38,
    "window_m": [
     603.0,
     628.0
    ],
    "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": "Peyrelongue-Abos",
  "county": "Pyr\u00e9n\u00e9es-Atlantiques",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}