{
 "ocl_version": "0.1.0",
 "name": "A Costa di Brancuciu",
 "slug": "a-costa-di-brancuciu",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 50.06020052751676,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 276.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 28.025735413856623,
   "end_elevation_m": 29.026939424406958,
   "min_gradient_pct": -11.548235574257681
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 47.10802703880491,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 275.0,
   "end_distance_m": 278.0,
   "start_elevation_m": 27.61369861324281,
   "end_elevation_m": 29.026939424406958,
   "min_gradient_pct": -8.845192503656563
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 40.502548131933125,
   "diagnostic": false,
   "flags": [
    "suppression_unstable",
    "canopy_or_structure"
   ],
   "start_distance_m": 274.0,
   "end_distance_m": 279.0,
   "start_elevation_m": 27.222856900146986,
   "end_elevation_m": 29.247984306743643,
   "min_gradient_pct": -7.931667041579544
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 34.87586347590586,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 274.0,
   "end_distance_m": 284.0,
   "start_elevation_m": 27.222856900146986,
   "end_elevation_m": 30.710443247737572,
   "min_gradient_pct": -7.420837004010252
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 26.473708504794153,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 274.0,
   "end_distance_m": 294.0,
   "start_elevation_m": 27.222856900146986,
   "end_elevation_m": 32.51759860110582,
   "min_gradient_pct": -6.297526879221422
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.533829084724204,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 356.0,
   "end_distance_m": 381.0,
   "start_elevation_m": 45.01329353753603,
   "end_elevation_m": 51.39675080871708,
   "min_gradient_pct": -6.064983089765633
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 23.68712016860684,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 339.0,
   "end_distance_m": 389.0,
   "start_elevation_m": 41.20346517149831,
   "end_elevation_m": 53.04702525580173,
   "min_gradient_pct": -4.275095767891145
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.454145757592528,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 274.0,
   "end_distance_m": 374.0,
   "start_elevation_m": 27.222856900146986,
   "end_elevation_m": 49.677002657739514,
   "min_gradient_pct": -0.7485021036251993
  }
 ],
 "shape": {
  "ascent_concentration": 0.567,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 149.0,
  "shape_class": "stepped"
 },
 "length_m": 979.3834301664896,
 "start_elevation_m": 2.7446432424954703,
 "end_elevation_m": 81.58656555175756,
 "endpoint_gain_m": 78.84192230926209,
 "overall_gradient_pct": 8.050158893933851,
 "accumulated_ascent_m": 81.58953439433574,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 40.502548131933125,
   "start_distance_m": 274.0,
   "end_distance_m": 279.0,
   "midpoint_distance_m": 276.5,
   "start_elevation_m": 27.222856900146986,
   "end_elevation_m": 29.247984306743643,
   "start_xy": [
    1217050.9187233734,
    6052256.500562892
   ],
   "end_xy": [
    1217054.031400636,
    6052260.413520886
   ]
  },
  "max_10m": {
   "gradient_pct": 34.87586347590586,
   "start_distance_m": 274.0,
   "end_distance_m": 284.0,
   "midpoint_distance_m": 279.0,
   "start_elevation_m": 27.222856900146986,
   "end_elevation_m": 30.710443247737572,
   "start_xy": [
    1217050.9187233734,
    6052256.500562892
   ],
   "end_xy": [
    1217057.1440778987,
    6052264.326478879
   ]
  },
  "max_20m": {
   "gradient_pct": 26.473708504794153,
   "start_distance_m": 274.0,
   "end_distance_m": 294.0,
   "midpoint_distance_m": 284.0,
   "start_elevation_m": 27.222856900146986,
   "end_elevation_m": 32.51759860110582,
   "start_xy": [
    1217050.9187233734,
    6052256.500562892
   ],
   "end_xy": [
    1217063.3694324242,
    6052272.152394866
   ]
  },
  "max_25m": {
   "gradient_pct": 25.533829084724204,
   "start_distance_m": 356.0,
   "end_distance_m": 381.0,
   "midpoint_distance_m": 368.5,
   "start_elevation_m": 45.01329353753603,
   "end_elevation_m": 51.39675080871708,
   "start_xy": [
    1217105.8335684377,
    6052316.359795499
   ],
   "end_xy": [
    1217130.422110366,
    6052320.0243644975
   ]
  },
  "max_50m": {
   "gradient_pct": 23.68712016860684,
   "start_distance_m": 339.0,
   "end_distance_m": 389.0,
   "midpoint_distance_m": 364.0,
   "start_elevation_m": 41.20346517149831,
   "end_elevation_m": 53.04702525580173,
   "start_xy": [
    1217092.0260029046,
    6052306.839616469
   ],
   "end_xy": [
    1217138.4033500126,
    6052320.571916963
   ]
  },
  "max_100m": {
   "gradient_pct": 22.454145757592528,
   "start_distance_m": 274.0,
   "end_distance_m": 374.0,
   "midpoint_distance_m": 324.0,
   "start_elevation_m": 27.222856900146986,
   "end_elevation_m": 49.677002657739514,
   "start_xy": [
    1217050.9187233734,
    6052256.500562892
   ],
   "end_xy": [
    1217123.438525675,
    6052319.545256089
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.931667041579544,
   "start_distance_m": 686.0,
   "end_distance_m": 691.0,
   "midpoint_distance_m": 688.5,
   "start_elevation_m": 68.36468500852745,
   "end_elevation_m": 67.96810165644847,
   "start_xy": [
    1217301.2846296865,
    6052556.535495727
   ],
   "end_xy": [
    1217305.061724991,
    6052559.811705589
   ]
  },
  "min_10m": {
   "gradient_pct": -7.420837004010252,
   "start_distance_m": 681.0,
   "end_distance_m": 691.0,
   "midpoint_distance_m": 686.0,
   "start_elevation_m": 68.7101853568495,
   "end_elevation_m": 67.96810165644847,
   "start_xy": [
    1217297.9655011531,
    6052552.909232307
   ],
   "end_xy": [
    1217305.061724991,
    6052559.811705589
   ]
  },
  "min_20m": {
   "gradient_pct": -6.297526879221422,
   "start_distance_m": 675.0,
   "end_distance_m": 695.0,
   "midpoint_distance_m": 685.0,
   "start_elevation_m": 69.10071504804068,
   "end_elevation_m": 67.8412096721964,
   "start_xy": [
    1217295.3612796515,
    6052547.503861795
   ],
   "end_xy": [
    1217308.0834012348,
    6052562.4326734785
   ]
  },
  "min_25m": {
   "gradient_pct": -6.064983089765633,
   "start_distance_m": 675.0,
   "end_distance_m": 700.0,
   "midpoint_distance_m": 687.5,
   "start_elevation_m": 69.10071504804068,
   "end_elevation_m": 67.58446927559928,
   "start_xy": [
    1217295.3612796515,
    6052547.503861795
   ],
   "end_xy": [
    1217311.8604965394,
    6052565.708883341
   ]
  },
  "min_50m": {
   "gradient_pct": -4.275095767891145,
   "start_distance_m": 668.0,
   "end_distance_m": 718.0,
   "midpoint_distance_m": 693.0,
   "start_elevation_m": 69.22096308931054,
   "end_elevation_m": 67.08341520536497,
   "start_xy": [
    1217293.2949367876,
    6052540.827168532
   ],
   "end_xy": [
    1217324.0314588735,
    6052578.675587808
   ]
  },
  "min_100m": {
   "gradient_pct": -0.7485021036251993,
   "start_distance_m": 632.0,
   "end_distance_m": 732.0,
   "midpoint_distance_m": 682.0,
   "start_elevation_m": 67.98859067852015,
   "end_elevation_m": 67.24008857489495,
   "start_xy": [
    1217280.4224924946,
    6052507.236503945
   ],
   "end_xy": [
    1217327.314355323,
    6052592.022243716
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 50.06020052751676,
   "start_distance_m": 276.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 277.0,
   "start_elevation_m": 28.025735413856623,
   "end_elevation_m": 29.026939424406958,
   "start_xy": [
    1217052.1637942784,
    6052258.065746089
   ],
   "end_xy": [
    1217053.4088651836,
    6052259.630929287
   ]
  },
  "max_3m": {
   "gradient_pct": 47.10802703880491,
   "start_distance_m": 275.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 276.5,
   "start_elevation_m": 27.61369861324281,
   "end_elevation_m": 29.026939424406958,
   "start_xy": [
    1217051.541258826,
    6052257.283154491
   ],
   "end_xy": [
    1217053.4088651836,
    6052259.630929287
   ]
  }
 },
 "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": {
  "texture_windows": {
   "rounds": 0,
   "windows_masked": [],
   "advisory": [],
   "unresolved": [],
   "unstable": [
    {
     "window_m": 5.0,
     "start_m": 274.0,
     "end_m": 279.0,
     "raw_pct": 40.5,
     "reason": "short-step",
     "perturbations": [
      "phase+0.000/mask+0",
      "phase+0.333/mask+1",
      "phase+0.667/mask-1"
     ],
     "perturbation_reasons": [
      "short-step",
      "",
      "short-step"
     ]
    }
   ]
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.048,
   "obstruction_max_height_m": 7.02,
   "flagged_windows_m": [
    2,
    3,
    5.0,
    10,
    20
   ]
  },
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "33abfff569d4360542e616d0d42c1b94d0a711fa",
   "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-co3",
   "road_pbf": "block-batch-fr-co3.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": "sha256:2a717d675f2607cc"
  },
  "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_E1216-N6052_0m5@21LHDCorseVU-2025-04-02.tif",
   "data/cache/fr/ign-lidarhd_dtm_E1217-N6052_0m5@21LHDCorseVU-2025-04-02.tif"
  ],
  "calculated_at": "2026-09-25T00:48:27+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-co3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-co3",
  "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": [
   "E1216-N6052",
   "E1217-N6052"
  ],
  "elevation_blocks": [
   "21LHDCorseVU@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_1216_6053_MNT_O_0M50_LAMB93_IGN78",
   "LHD_FXX_1217_6053_MNT_O_0M50_LAMB93_IGN78"
  ],
  "ign_missions": [
   "21LHDCorseVU"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_1216_6053_MNT_O_0M50_LAMB93_IGN78": "2025-04-02",
   "LHD_FXX_1217_6053_MNT_O_0M50_LAMB93_IGN78": "2025-04-02"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "suppression_unstable": [
   5.0
  ],
  "carriageway": {
   "stations": 46,
   "stations_resolved": 46,
   "width_median_m": 4.75,
   "width_p10_m": 3.12,
   "width_min_m": 1.25,
   "width_max_m": 12.0,
   "bounded_share": 0.283,
   "unbounded_share": 0.717,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.25,
   "window_m": [
    356.0,
    381.0
   ],
   "width_at_max25_m": 4.25,
   "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": 46,
    "stations_resolved": 46,
    "width_median_m": 4.12,
    "width_p10_m": 2.12,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.848,
    "unbounded_share": 0.152,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.0,
    "window_m": [
     356.0,
     381.0
    ],
    "width_at_max25_m": 3.25,
    "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": "Bonifacio / Bunifaziu",
  "county": "Corse-du-Sud",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}