{
 "ocl_version": "0.1.0",
 "name": "Chemin des Barthes",
 "slug": "chemin-des-barthes",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 37.66077879001131,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 391.0,
   "end_distance_m": 393.0,
   "start_elevation_m": 184.48855900154444,
   "end_elevation_m": 185.24177457734467,
   "min_gradient_pct": -12.020542259234901
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.51030953402975,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 391.0,
   "end_distance_m": 394.0,
   "start_elevation_m": 184.48855900154444,
   "end_elevation_m": 185.58386828756534,
   "min_gradient_pct": -9.425242228542174
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 33.928296669707834,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 391.0,
   "end_distance_m": 396.0,
   "start_elevation_m": 184.48855900154444,
   "end_elevation_m": 186.18497383502984,
   "min_gradient_pct": -4.799590992391813
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 27.285440991388725,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 390.0,
   "end_distance_m": 400.0,
   "start_elevation_m": 184.26273720146474,
   "end_elevation_m": 186.99128130060362,
   "min_gradient_pct": 0.18655537791829602
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.446537096778286,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 390.0,
   "end_distance_m": 410.0,
   "start_elevation_m": 184.26273720146474,
   "end_elevation_m": 188.9520446208204,
   "min_gradient_pct": 0.9205188157510236
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.268833032669136,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 389.0,
   "end_distance_m": 414.0,
   "start_elevation_m": 184.1001362676099,
   "end_elevation_m": 189.6673445257772,
   "min_gradient_pct": 1.2248718707778607
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.476795960715606,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 364.0,
   "end_distance_m": 414.0,
   "start_elevation_m": 179.4289465454194,
   "end_elevation_m": 189.6673445257772,
   "min_gradient_pct": 2.0477636351366186
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.995181899479405,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 304.0,
   "end_distance_m": 404.0,
   "start_elevation_m": 168.7697930692048,
   "end_elevation_m": 187.76497496868421,
   "min_gradient_pct": 4.538116208974088
  }
 ],
 "shape": {
  "ascent_concentration": 0.37,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 322.0,
  "shape_class": "sustained"
 },
 "length_m": 470.00000000004127,
 "start_elevation_m": 136.20007961204888,
 "end_elevation_m": 195.9260629778498,
 "endpoint_gain_m": 59.725983365800914,
 "overall_gradient_pct": 12.707656035275674,
 "accumulated_ascent_m": 60.19042096368358,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 33.928296669707834,
   "start_distance_m": 391.0,
   "end_distance_m": 396.0,
   "midpoint_distance_m": 393.5,
   "start_elevation_m": 184.48855900154444,
   "end_elevation_m": 186.18497383502984,
   "start_xy": [
    557531.8242232692,
    6382080.086993595
   ],
   "end_xy": [
    557536.3184063354,
    6382077.89557429
   ]
  },
  "max_10m": {
   "gradient_pct": 27.285440991388725,
   "start_distance_m": 390.0,
   "end_distance_m": 400.0,
   "midpoint_distance_m": 395.0,
   "start_elevation_m": 184.26273720146474,
   "end_elevation_m": 186.99128130060362,
   "start_xy": [
    557530.9253866561,
    6382080.525277456
   ],
   "end_xy": [
    557539.9137527883,
    6382076.142438847
   ]
  },
  "max_20m": {
   "gradient_pct": 23.446537096778286,
   "start_distance_m": 390.0,
   "end_distance_m": 410.0,
   "midpoint_distance_m": 400.0,
   "start_elevation_m": 184.26273720146474,
   "end_elevation_m": 188.9520446208204,
   "start_xy": [
    557530.9253866561,
    6382080.525277456
   ],
   "end_xy": [
    557548.9021189206,
    6382071.759600238
   ]
  },
  "max_25m": {
   "gradient_pct": 22.268833032669136,
   "start_distance_m": 389.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 401.5,
   "start_elevation_m": 184.1001362676099,
   "end_elevation_m": 189.6673445257772,
   "start_xy": [
    557530.0265500428,
    6382080.963561317
   ],
   "end_xy": [
    557551.9655550966,
    6382069.438718755
   ]
  },
  "max_50m": {
   "gradient_pct": 20.476795960715606,
   "start_distance_m": 364.0,
   "end_distance_m": 414.0,
   "midpoint_distance_m": 389.0,
   "start_elevation_m": 179.4289465454194,
   "end_elevation_m": 189.6673445257772,
   "start_xy": [
    557507.559267988,
    6382091.926858801
   ],
   "end_xy": [
    557551.9655550966,
    6382069.438718755
   ]
  },
  "max_100m": {
   "gradient_pct": 18.995181899479405,
   "start_distance_m": 304.0,
   "end_distance_m": 404.0,
   "midpoint_distance_m": 354.0,
   "start_elevation_m": 168.7697930692048,
   "end_elevation_m": 187.76497496868421,
   "start_xy": [
    557458.2541615644,
    6382126.117595566
   ],
   "end_xy": [
    557543.5090992412,
    6382074.389303404
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.799590992391813,
   "start_distance_m": 113.0,
   "end_distance_m": 118.0,
   "midpoint_distance_m": 115.5,
   "start_elevation_m": 142.9646267513692,
   "end_elevation_m": 142.7246472017496,
   "start_xy": [
    557349.4815455982,
    6382265.056066292
   ],
   "end_xy": [
    557349.5395287678,
    6382260.056402508
   ]
  },
  "min_10m": {
   "gradient_pct": 0.18655537791829602,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 136.20007961204888,
   "end_elevation_m": 136.2187351498407,
   "start_xy": [
    557270.003,
    6382342.492
   ],
   "end_xy": [
    557277.9013833075,
    6382336.358849005
   ]
  },
  "min_20m": {
   "gradient_pct": 0.9205188157510236,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 136.20007961204888,
   "end_elevation_m": 136.3841833751991,
   "start_xy": [
    557270.003,
    6382342.492
   ],
   "end_xy": [
    557285.799766615,
    6382330.225698009
   ]
  },
  "min_25m": {
   "gradient_pct": 1.2248718707778607,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 136.20007961204888,
   "end_elevation_m": 136.50629757974335,
   "start_xy": [
    557270.003,
    6382342.492
   ],
   "end_xy": [
    557289.7489582688,
    6382327.159122512
   ]
  },
  "min_50m": {
   "gradient_pct": 2.0477636351366186,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 136.20007961204888,
   "end_elevation_m": 137.2239614296172,
   "start_xy": [
    557270.003,
    6382342.492
   ],
   "end_xy": [
    557309.4949165375,
    6382311.826245025
   ]
  },
  "min_100m": {
   "gradient_pct": 4.538116208974088,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 136.20007961204888,
   "end_elevation_m": 140.73819582102297,
   "start_xy": [
    557270.003,
    6382342.492
   ],
   "end_xy": [
    557344.1848953761,
    6382276.113648308
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 37.66077879001131,
   "start_distance_m": 391.0,
   "end_distance_m": 393.0,
   "midpoint_distance_m": 392.0,
   "start_elevation_m": 184.48855900154444,
   "end_elevation_m": 185.24177457734467,
   "start_xy": [
    557531.8242232692,
    6382080.086993595
   ],
   "end_xy": [
    557533.6218964957,
    6382079.210425873
   ]
  },
  "max_3m": {
   "gradient_pct": 36.51030953402975,
   "start_distance_m": 391.0,
   "end_distance_m": 394.0,
   "midpoint_distance_m": 392.5,
   "start_elevation_m": 184.48855900154444,
   "end_elevation_m": 185.58386828756534,
   "start_xy": [
    557531.8242232692,
    6382080.086993595
   ],
   "end_xy": [
    557534.520733109,
    6382078.772142013
   ]
  }
 },
 "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": 0.399,
   "obstruction_max_height_m": 16.34,
   "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": "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-mc1",
   "road_pbf": "block-batch-fr-mc1.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_E557-N6381_0m5@21LHD2IO-2025-04-02.tif",
   "data/cache/fr/ign-lidarhd_dtm_E557-N6382_0m5@21LHD2IO-2025-04-02.tif"
  ],
  "calculated_at": "2026-09-22T17:10:04+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc1",
  "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": [
   "E557-N6381",
   "E557-N6382"
  ],
  "elevation_blocks": [
   "21LHD2IO@2025-04-02"
  ],
  "ign_dalles": [
   "LHD_FXX_0557_6382_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0557_6383_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD2IO"
  ],
  "ign_editions": [
   "2025-04-02"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0557_6382_MNT_O_0M50_LAMB93_IGN69": "2025-04-02",
   "LHD_FXX_0557_6383_MNT_O_0M50_LAMB93_IGN69": "2025-04-02"
  },
  "route_summit_trim_m": 71.4,
  "route_summit_trim_loss_m": 5.8,
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 25,
   "stations_resolved": 25,
   "width_median_m": 2.75,
   "width_p10_m": 2.1,
   "width_min_m": 1.75,
   "width_max_m": 12.0,
   "bounded_share": 0.52,
   "unbounded_share": 0.48,
   "confidence_median": 0.502,
   "width_median_bounded_m": 2.75,
   "window_m": [
    389.0,
    414.0
   ],
   "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": 25,
    "stations_resolved": 25,
    "width_median_m": 2.5,
    "width_p10_m": 0.75,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.96,
    "unbounded_share": 0.04,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.5,
    "window_m": [
     389.0,
     414.0
    ],
    "width_at_max25_m": 1.5,
    "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": "Prayssac",
  "county": "Lot",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}