{
 "ocl_version": "0.1.0",
 "name": "Col de Bratte from Bratte",
 "slug": "col-de-bratte-from-bratte",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 11.924226320525122,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 622.0,
   "end_distance_m": 624.0,
   "start_elevation_m": 331.52850127392685,
   "end_elevation_m": 331.76698580033735,
   "min_gradient_pct": -6.627938893169016
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 11.542552740199122,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 622.0,
   "end_distance_m": 625.0,
   "start_elevation_m": 331.52850127392685,
   "end_elevation_m": 331.8747778561328,
   "min_gradient_pct": -6.42367093449252
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 11.348280269817224,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 618.0,
   "end_distance_m": 623.0,
   "start_elevation_m": 331.0979343799715,
   "end_elevation_m": 331.66534839346235,
   "min_gradient_pct": -6.099426633751364
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 10.49276300502811,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 618.0,
   "end_distance_m": 628.0,
   "start_elevation_m": 331.0979343799715,
   "end_elevation_m": 332.1472106804743,
   "min_gradient_pct": -6.049488414338953
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 9.808057951603928,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 613.0,
   "end_distance_m": 633.0,
   "start_elevation_m": 330.6705822516016,
   "end_elevation_m": 332.6321938419224,
   "min_gradient_pct": -5.398313956625316
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 9.47833521865482,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 614.0,
   "end_distance_m": 639.0,
   "start_elevation_m": 330.7566320157566,
   "end_elevation_m": 333.1262158204203,
   "min_gradient_pct": -5.174836670724289
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 8.616758915849118,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 618.0,
   "end_distance_m": 668.0,
   "start_elevation_m": 331.0979343799715,
   "end_elevation_m": 335.40631383789605,
   "min_gradient_pct": -4.039522810027961
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 8.525737962500159,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 610.0,
   "end_distance_m": 710.0,
   "start_elevation_m": 330.4503357092799,
   "end_elevation_m": 338.97607367178006,
   "min_gradient_pct": -2.2679990356938333
  }
 ],
 "shape": {
  "ascent_concentration": 0.467,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 16.0,
  "shape_class": "stepped"
 },
 "length_m": 1026.0794103894304,
 "start_elevation_m": 319.9620622826624,
 "end_elevation_m": 345.78787615771034,
 "endpoint_gain_m": 25.82581387504797,
 "overall_gradient_pct": 2.5169410489628903,
 "accumulated_ascent_m": 31.405508942791585,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 11.348280269817224,
   "start_distance_m": 618.0,
   "end_distance_m": 623.0,
   "midpoint_distance_m": 620.5,
   "start_elevation_m": 331.0979343799715,
   "end_elevation_m": 331.66534839346235,
   "start_xy": [
    935579.5636265136,
    6861933.969134526
   ],
   "end_xy": [
    935575.5048264645,
    6861931.061007577
   ]
  },
  "max_10m": {
   "gradient_pct": 10.49276300502811,
   "start_distance_m": 618.0,
   "end_distance_m": 628.0,
   "midpoint_distance_m": 623.0,
   "start_elevation_m": 331.0979343799715,
   "end_elevation_m": 332.1472106804743,
   "start_xy": [
    935579.5636265136,
    6861933.969134526
   ],
   "end_xy": [
    935571.6603236798,
    6861927.898810342
   ]
  },
  "max_20m": {
   "gradient_pct": 9.808057951603928,
   "start_distance_m": 613.0,
   "end_distance_m": 633.0,
   "midpoint_distance_m": 623.0,
   "start_elevation_m": 330.6705822516016,
   "end_elevation_m": 332.6321938419224,
   "start_xy": [
    935584.0775855271,
    6861936.119523004
   ],
   "end_xy": [
    935568.4025560148,
    6861924.105797049
   ]
  },
  "max_25m": {
   "gradient_pct": 9.47833521865482,
   "start_distance_m": 614.0,
   "end_distance_m": 639.0,
   "midpoint_distance_m": 626.5,
   "start_elevation_m": 330.7566320157566,
   "end_elevation_m": 333.1262158204203,
   "start_xy": [
    935583.1749663573,
    6861935.6890835175
   ],
   "end_xy": [
    935564.6304532877,
    6861919.45916619
   ]
  },
  "max_50m": {
   "gradient_pct": 8.616758915849118,
   "start_distance_m": 618.0,
   "end_distance_m": 668.0,
   "midpoint_distance_m": 643.0,
   "start_elevation_m": 331.0979343799715,
   "end_elevation_m": 335.40631383789605,
   "start_xy": [
    935579.5636265136,
    6861933.969134526
   ],
   "end_xy": [
    935550.6856157169,
    6861894.0319857495
   ]
  },
  "max_100m": {
   "gradient_pct": 8.525737962500159,
   "start_distance_m": 610.0,
   "end_distance_m": 710.0,
   "midpoint_distance_m": 660.0,
   "start_elevation_m": 330.4503357092799,
   "end_elevation_m": 338.97607367178006,
   "start_xy": [
    935586.7841976996,
    6861937.413451344
   ],
   "end_xy": [
    935527.0847423401,
    6861859.4095784
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.099426633751364,
   "start_distance_m": 216.0,
   "end_distance_m": 221.0,
   "midpoint_distance_m": 218.5,
   "start_elevation_m": 325.5155555650836,
   "end_elevation_m": 325.21058423339605,
   "start_xy": [
    935969.5288357326,
    6861852.777433025
   ],
   "end_xy": [
    935964.7002082028,
    6861854.075260509
   ]
  },
  "min_10m": {
   "gradient_pct": -6.049488414338953,
   "start_distance_m": 213.0,
   "end_distance_m": 223.0,
   "midpoint_distance_m": 218.0,
   "start_elevation_m": 325.70771381632807,
   "end_elevation_m": 325.10276497489417,
   "start_xy": [
    935972.4260122504,
    6861851.998736533
   ],
   "end_xy": [
    935962.768757191,
    6861854.594391502
   ]
  },
  "min_20m": {
   "gradient_pct": -5.398313956625316,
   "start_distance_m": 208.0,
   "end_distance_m": 228.0,
   "midpoint_distance_m": 218.0,
   "start_elevation_m": 325.96330973270585,
   "end_elevation_m": 324.8836469413808,
   "start_xy": [
    935977.2546397801,
    6861850.700909049
   ],
   "end_xy": [
    935957.9401296612,
    6861855.892218987
   ]
  },
  "min_25m": {
   "gradient_pct": -5.174836670724289,
   "start_distance_m": 204.0,
   "end_distance_m": 229.0,
   "midpoint_distance_m": 216.5,
   "start_elevation_m": 326.124101846026,
   "end_elevation_m": 324.83039267834494,
   "start_xy": [
    935981.1175418039,
    6861849.662647062
   ],
   "end_xy": [
    935956.9744041553,
    6861856.151784484
   ]
  },
  "min_50m": {
   "gradient_pct": -4.039522810027961,
   "start_distance_m": 200.0,
   "end_distance_m": 250.0,
   "midpoint_distance_m": 225.0,
   "start_elevation_m": 326.29165004725246,
   "end_elevation_m": 324.2718886422385,
   "start_xy": [
    935984.9987855785,
    6861848.753955637
   ],
   "end_xy": [
    935936.6941685305,
    6861861.602659918
   ]
  },
  "min_100m": {
   "gradient_pct": -2.2679990356938333,
   "start_distance_m": 183.0,
   "end_distance_m": 283.0,
   "midpoint_distance_m": 233.0,
   "start_elevation_m": 326.48799709371815,
   "end_elevation_m": 324.2199980580243,
   "start_xy": [
    936001.9958212125,
    6861848.43649752
   ],
   "end_xy": [
    935904.8252268344,
    6861870.168321316
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 11.924226320525122,
   "start_distance_m": 622.0,
   "end_distance_m": 624.0,
   "midpoint_distance_m": 623.0,
   "start_elevation_m": 331.52850127392685,
   "end_elevation_m": 331.76698580033735,
   "start_xy": [
    935576.3085597106,
    6861931.6559973825
   ],
   "end_xy": [
    935574.7010932184,
    6861930.4660177715
   ]
  },
  "max_3m": {
   "gradient_pct": 11.542552740199122,
   "start_distance_m": 622.0,
   "end_distance_m": 625.0,
   "midpoint_distance_m": 623.5,
   "start_elevation_m": 331.52850127392685,
   "end_elevation_m": 331.8747778561328,
   "start_xy": [
    935576.3085597106,
    6861931.6559973825
   ],
   "end_xy": [
    935573.8973599722,
    6861929.871027965
   ]
  }
 },
 "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": 0.035,
   "obstruction_max_height_m": 13.62,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "descends_at_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "16bcc1553fe58b280e0c4a66a3ab0980530490a6",
   "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-ne7",
   "road_pbf": "block-batch-fr-ne7.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": "sha256:18f786cf9fa98070"
  },
  "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_E935-N6861_0m5@23LHD1PE-2025-01-29.tif",
   "data/cache/fr/ign-lidarhd_dtm_E936-N6861_0m5@23LHD1QE-2024-12-16.tif"
  ],
  "calculated_at": "2026-09-26T17:46:09+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-ne7.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-ne7",
  "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": [
   "E935-N6861",
   "E936-N6861"
  ],
  "elevation_blocks": [
   "23LHD1PE@2025-01-29",
   "23LHD1QE@2024-12-16"
  ],
  "ign_dalles": [
   "LHD_FXX_0935_6862_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0936_6862_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "23LHD1PE",
   "23LHD1QE"
  ],
  "ign_editions": [
   "2024-12-16",
   "2025-01-29"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0935_6862_MNT_O_0M50_LAMB93_IGN69": "2025-01-29",
   "LHD_FXX_0936_6862_MNT_O_0M50_LAMB93_IGN69": "2024-12-16"
  },
  "climb_origin": "named-pass",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 48,
   "stations_resolved": 48,
   "width_median_m": 6.0,
   "width_p10_m": 4.92,
   "width_min_m": 4.0,
   "width_max_m": 11.0,
   "bounded_share": 0.125,
   "unbounded_share": 0.875,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.62,
   "window_m": [
    614.0,
    639.0
   ],
   "width_at_max25_m": 9.25,
   "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": 48,
    "stations_resolved": 48,
    "width_median_m": 9.38,
    "width_p10_m": 4.5,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.625,
    "unbounded_share": 0.375,
    "confidence_median": 0.96,
    "width_median_bounded_m": 8.0,
    "window_m": [
     614.0,
     639.0
    ],
    "width_at_max25_m": 11.5,
    "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": "Bratte",
  "county": "Meurthe-et-Moselle",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}