{
 "ocl_version": "0.1.0",
 "name": "Chemin Marcelin Albert",
 "slug": "chemin-marcelin-albert",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.773896887624574,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 304.0,
   "end_distance_m": 306.0,
   "start_elevation_m": 132.57913500247096,
   "end_elevation_m": 133.17461294022345,
   "min_gradient_pct": -11.042889827417213
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.85200996394417,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 304.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 132.57913500247096,
   "end_elevation_m": 133.4446953013893,
   "min_gradient_pct": -4.587169201001018
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.334730982348333,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 302.0,
   "end_distance_m": 307.0,
   "start_elevation_m": 132.02795875227187,
   "end_elevation_m": 133.4446953013893,
   "min_gradient_pct": -1.0172730707932942
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.411440650546467,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 300.0,
   "end_distance_m": 310.0,
   "start_elevation_m": 131.55882510546994,
   "end_elevation_m": 134.19996917052458,
   "min_gradient_pct": 0.7725653839270308
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.65687623338829,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 298.0,
   "end_distance_m": 318.0,
   "start_elevation_m": 131.16189300289795,
   "end_elevation_m": 135.8932682495756,
   "min_gradient_pct": 4.623242528619187
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.60917033228111,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 298.0,
   "end_distance_m": 323.0,
   "start_elevation_m": 131.16189300289795,
   "end_elevation_m": 136.81418558596823,
   "min_gradient_pct": 5.330430753034591
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.018194518013274,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 295.0,
   "end_distance_m": 345.0,
   "start_elevation_m": 130.64180949945165,
   "end_elevation_m": 141.6509067584583,
   "min_gradient_pct": 6.465356030937073
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.969929154202816,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 290.0,
   "end_distance_m": 390.0,
   "start_elevation_m": 129.9257663697295,
   "end_elevation_m": 147.89569552393232,
   "min_gradient_pct": 7.129483935601129
  }
 ],
 "shape": {
  "ascent_concentration": 0.351,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 241.0,
  "shape_class": "sustained"
 },
 "length_m": 390.1308101743155,
 "start_elevation_m": 97.86839925610604,
 "end_elevation_m": 147.9128267656166,
 "endpoint_gain_m": 50.04442750951054,
 "overall_gradient_pct": 12.827601974617192,
 "accumulated_ascent_m": 50.43228568716226,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.334730982348333,
   "start_distance_m": 302.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 304.5,
   "start_elevation_m": 132.02795875227187,
   "end_elevation_m": 133.4446953013893,
   "start_xy": [
    832603.5007668013,
    6336428.13417184
   ],
   "end_xy": [
    832601.0908269872,
    6336432.432614527
   ]
  },
  "max_10m": {
   "gradient_pct": 26.411440650546467,
   "start_distance_m": 300.0,
   "end_distance_m": 310.0,
   "midpoint_distance_m": 305.0,
   "start_elevation_m": 131.55882510546994,
   "end_elevation_m": 134.19996917052458,
   "start_xy": [
    832603.9190711087,
    6336426.17840562
   ],
   "end_xy": [
    832598.9021815184,
    6336434.3610383095
   ]
  },
  "max_20m": {
   "gradient_pct": 23.65687623338829,
   "start_distance_m": 298.0,
   "end_distance_m": 318.0,
   "midpoint_distance_m": 308.0,
   "start_elevation_m": 131.16189300289795,
   "end_elevation_m": 135.8932682495756,
   "start_xy": [
    832604.337375416,
    6336424.2226394005
   ],
   "end_xy": [
    832591.4380817551,
    6336437.1276002
   ]
  },
  "max_25m": {
   "gradient_pct": 22.60917033228111,
   "start_distance_m": 298.0,
   "end_distance_m": 323.0,
   "midpoint_distance_m": 310.5,
   "start_elevation_m": 131.16189300289795,
   "end_elevation_m": 136.81418558596823,
   "start_xy": [
    832604.337375416,
    6336424.2226394005
   ],
   "end_xy": [
    832586.6365019118,
    6336438.52217218
   ]
  },
  "max_50m": {
   "gradient_pct": 22.018194518013274,
   "start_distance_m": 295.0,
   "end_distance_m": 345.0,
   "midpoint_distance_m": 320.0,
   "start_elevation_m": 130.64180949945165,
   "end_elevation_m": 141.6509067584583,
   "start_xy": [
    832604.9648318769,
    6336421.28899007
   ],
   "end_xy": [
    832566.9176505457,
    6336447.974557608
   ]
  },
  "max_100m": {
   "gradient_pct": 17.969929154202816,
   "start_distance_m": 290.0,
   "end_distance_m": 390.0,
   "midpoint_distance_m": 340.0,
   "start_elevation_m": 129.9257663697295,
   "end_elevation_m": 147.89569552393232,
   "start_xy": [
    832606.1391559917,
    6336416.435481171
   ],
   "end_xy": [
    832532.0378451957,
    6336476.346488234
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.0172730707932942,
   "start_distance_m": 125.0,
   "end_distance_m": 130.0,
   "midpoint_distance_m": 127.5,
   "start_elevation_m": 107.93560024545096,
   "end_elevation_m": 107.88473659191129,
   "start_xy": [
    832692.6065155853,
    6336277.156233828
   ],
   "end_xy": [
    832689.0906785126,
    6336280.711355439
   ]
  },
  "min_10m": {
   "gradient_pct": 0.7725653839270308,
   "start_distance_m": 125.0,
   "end_distance_m": 135.0,
   "midpoint_distance_m": 130.0,
   "start_elevation_m": 107.93560024545096,
   "end_elevation_m": 108.01285678384366,
   "start_xy": [
    832692.6065155853,
    6336277.156233828
   ],
   "end_xy": [
    832685.57484144,
    6336284.266477052
   ]
  },
  "min_20m": {
   "gradient_pct": 4.623242528619187,
   "start_distance_m": 122.0,
   "end_distance_m": 142.0,
   "midpoint_distance_m": 132.0,
   "start_elevation_m": 107.67210997654018,
   "end_elevation_m": 108.59675848226402,
   "start_xy": [
    832694.7160178289,
    6336275.02316086
   ],
   "end_xy": [
    832680.7608558866,
    6336289.337065291
   ]
  },
  "min_25m": {
   "gradient_pct": 5.330430753034591,
   "start_distance_m": 125.0,
   "end_distance_m": 150.0,
   "midpoint_distance_m": 137.5,
   "start_elevation_m": 107.93560024545096,
   "end_elevation_m": 109.2682079337096,
   "start_xy": [
    832692.6065155853,
    6336277.156233828
   ],
   "end_xy": [
    832675.953143889,
    6336295.7312740255
   ]
  },
  "min_50m": {
   "gradient_pct": 6.465356030937073,
   "start_distance_m": 18.0,
   "end_distance_m": 68.0,
   "midpoint_distance_m": 43.0,
   "start_elevation_m": 99.15329256814404,
   "end_elevation_m": 102.38597058361258,
   "start_xy": [
    832769.0891328076,
    6336202.466947314
   ],
   "end_xy": [
    832732.4402949394,
    6336236.3966719685
   ]
  },
  "min_100m": {
   "gradient_pct": 7.129483935601129,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 97.86839925610604,
   "end_elevation_m": 104.99788319170717,
   "start_xy": [
    832783.099,
    6336191.166
   ],
   "end_xy": [
    832710.20025454,
    6336259.395150709
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.773896887624574,
   "start_distance_m": 304.0,
   "end_distance_m": 306.0,
   "midpoint_distance_m": 305.0,
   "start_elevation_m": 132.57913500247096,
   "end_elevation_m": 133.17461294022345,
   "start_xy": [
    832602.8017891357,
    6336429.9683482
   ],
   "end_xy": [
    832601.6611477033,
    6336431.611192418
   ]
  },
  "max_3m": {
   "gradient_pct": 28.85200996394417,
   "start_distance_m": 304.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 305.5,
   "start_elevation_m": 132.57913500247096,
   "end_elevation_m": 133.4446953013893,
   "start_xy": [
    832602.8017891357,
    6336429.9683482
   ],
   "end_xy": [
    832601.0908269872,
    6336432.432614527
   ]
  }
 },
 "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": 0.482,
   "obstruction_max_height_m": 16.53,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "076a8e7f889cfb3c2cf6b3de65a6030c7155b1f0",
   "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-mc8",
   "road_pbf": "block-batch-fr-mc8.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_E832-N6336_0m5@22LHD5NO-2025-04-22.tif"
  ],
  "calculated_at": "2026-09-22T15:29:37+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc8.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc8",
  "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": [
   "E832-N6336"
  ],
  "elevation_blocks": [
   "22LHD5NO@2025-04-22"
  ],
  "ign_dalles": [
   "LHD_FXX_0832_6337_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD5NO"
  ],
  "ign_editions": [
   "2025-04-22"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0832_6337_MNT_O_0M50_LAMB93_IGN69": "2025-04-22"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 22,
   "stations_resolved": 22,
   "width_median_m": 4.5,
   "width_p10_m": 2.3,
   "width_min_m": 1.25,
   "width_max_m": 10.75,
   "bounded_share": 0.5,
   "unbounded_share": 0.5,
   "confidence_median": 0.255,
   "width_median_bounded_m": 5.75,
   "window_m": [
    298.0,
    323.0
   ],
   "width_at_max25_m": 6.0,
   "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": 22,
    "stations_resolved": 22,
    "width_median_m": 2.5,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 9.5,
    "bounded_share": 0.818,
    "unbounded_share": 0.182,
    "confidence_median": 1.0,
    "width_median_bounded_m": 1.25,
    "window_m": [
     298.0,
     323.0
    ],
    "width_at_max25_m": 1.25,
    "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": "Laudun-l'Ardoise",
  "county": "Gard",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}