{
 "ocl_version": "0.1.0",
 "name": "Chemin de Versailles",
 "slug": "chemin-de-versailles",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.71417289321016,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 64.0,
   "end_distance_m": 66.0,
   "start_elevation_m": 262.5330843728399,
   "end_elevation_m": 263.0073678307041,
   "min_gradient_pct": -3.826106961111009
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 23.33992520509014,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 64.0,
   "end_distance_m": 67.0,
   "start_elevation_m": 262.5330843728399,
   "end_elevation_m": 263.2332821289926,
   "min_gradient_pct": -2.76514703622297
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.774619854294542,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 61.0,
   "end_distance_m": 66.0,
   "start_elevation_m": 261.86863683798936,
   "end_elevation_m": 263.0073678307041,
   "min_gradient_pct": -1.1690984769916213
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.362699406109527,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 60.0,
   "end_distance_m": 70.0,
   "start_elevation_m": 261.63861988717446,
   "end_elevation_m": 263.8748898277854,
   "min_gradient_pct": 0.10131910511859132
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.76658747312075,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 60.0,
   "end_distance_m": 80.0,
   "start_elevation_m": 261.63861988717446,
   "end_elevation_m": 265.9919373817986,
   "min_gradient_pct": 1.7173759911628395
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.75942994123352,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 60.0,
   "end_distance_m": 85.0,
   "start_elevation_m": 261.63861988717446,
   "end_elevation_m": 267.07847737248284,
   "min_gradient_pct": 2.1947151056581333
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.186293107985875,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 52.0,
   "end_distance_m": 102.0,
   "start_elevation_m": 260.1450519195446,
   "end_elevation_m": 270.2381984735375,
   "min_gradient_pct": 3.2610318416109294
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.767682634529137,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 34.0,
   "end_distance_m": 134.0,
   "start_elevation_m": 258.1301086604168,
   "end_elevation_m": 274.89779129494593,
   "min_gradient_pct": 6.23947878289988
  }
 ],
 "shape": {
  "ascent_concentration": 0.403,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 100.0,
  "shape_class": "sustained"
 },
 "length_m": 328.31342872307,
 "start_elevation_m": 255.48114766506382,
 "end_elevation_m": 292.46668467871774,
 "endpoint_gain_m": 36.985537013653925,
 "overall_gradient_pct": 11.265313501645087,
 "accumulated_ascent_m": 37.07683617255623,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.774619854294542,
   "start_distance_m": 61.0,
   "end_distance_m": 66.0,
   "midpoint_distance_m": 63.5,
   "start_elevation_m": 261.86863683798936,
   "end_elevation_m": 263.0073678307041,
   "start_xy": [
    825982.7189027524,
    6493004.182118821
   ],
   "end_xy": [
    825986.2388338636,
    6493000.631050675
   ]
  },
  "max_10m": {
   "gradient_pct": 22.362699406109527,
   "start_distance_m": 60.0,
   "end_distance_m": 70.0,
   "midpoint_distance_m": 65.0,
   "start_elevation_m": 261.63861988717446,
   "end_elevation_m": 263.8748898277854,
   "start_xy": [
    825982.0149165302,
    6493004.89233245
   ],
   "end_xy": [
    825989.0547787525,
    6492997.790196159
   ]
  },
  "max_20m": {
   "gradient_pct": 21.76658747312075,
   "start_distance_m": 60.0,
   "end_distance_m": 80.0,
   "midpoint_distance_m": 70.0,
   "start_elevation_m": 261.63861988717446,
   "end_elevation_m": 265.9919373817986,
   "start_xy": [
    825982.0149165302,
    6493004.89233245
   ],
   "end_xy": [
    825996.0946409749,
    6492990.688059868
   ]
  },
  "max_25m": {
   "gradient_pct": 21.75942994123352,
   "start_distance_m": 60.0,
   "end_distance_m": 85.0,
   "midpoint_distance_m": 72.5,
   "start_elevation_m": 261.63861988717446,
   "end_elevation_m": 267.07847737248284,
   "start_xy": [
    825982.0149165302,
    6493004.89233245
   ],
   "end_xy": [
    825999.614572086,
    6492987.136991723
   ]
  },
  "max_50m": {
   "gradient_pct": 20.186293107985875,
   "start_distance_m": 52.0,
   "end_distance_m": 102.0,
   "midpoint_distance_m": 77.0,
   "start_elevation_m": 260.1450519195446,
   "end_elevation_m": 270.2381984735375,
   "start_xy": [
    825976.3830267523,
    6493010.574041482
   ],
   "end_xy": [
    826011.534622056,
    6492975.020274611
   ]
  },
  "max_100m": {
   "gradient_pct": 16.767682634529137,
   "start_distance_m": 34.0,
   "end_distance_m": 134.0,
   "midpoint_distance_m": 84.0,
   "start_elevation_m": 258.1301086604168,
   "end_elevation_m": 274.89779129494593,
   "start_xy": [
    825965.9366761044,
    6493024.947077275
   ],
   "end_xy": [
    826031.6773116847,
    6492950.1556876935
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -1.1690984769916213,
   "start_distance_m": 273.0,
   "end_distance_m": 278.0,
   "midpoint_distance_m": 275.5,
   "start_elevation_m": 287.01782970516865,
   "end_elevation_m": 286.95937478131907,
   "start_xy": [
    826154.1271342533,
    6492892.026568124
   ],
   "end_xy": [
    826158.8046138695,
    6492890.259880705
   ]
  },
  "min_10m": {
   "gradient_pct": 0.10131910511859132,
   "start_distance_m": 269.0,
   "end_distance_m": 279.0,
   "midpoint_distance_m": 274.0,
   "start_elevation_m": 286.94281059894274,
   "end_elevation_m": 286.9529425094546,
   "start_xy": [
    826150.3851505602,
    6492893.43991806
   ],
   "end_xy": [
    826159.7401097928,
    6492889.90654322
   ]
  },
  "min_20m": {
   "gradient_pct": 1.7173759911628395,
   "start_distance_m": 259.0,
   "end_distance_m": 279.0,
   "midpoint_distance_m": 269.0,
   "start_elevation_m": 286.60946731122203,
   "end_elevation_m": 286.9529425094546,
   "start_xy": [
    826141.0301913276,
    6492896.973292899
   ],
   "end_xy": [
    826159.7401097928,
    6492889.90654322
   ]
  },
  "min_25m": {
   "gradient_pct": 2.1947151056581333,
   "start_distance_m": 254.0,
   "end_distance_m": 279.0,
   "midpoint_distance_m": 266.5,
   "start_elevation_m": 286.40426373304007,
   "end_elevation_m": 286.9529425094546,
   "start_xy": [
    826136.3527117113,
    6492898.7399803195
   ],
   "end_xy": [
    826159.7401097928,
    6492889.90654322
   ]
  },
  "min_50m": {
   "gradient_pct": 3.2610318416109294,
   "start_distance_m": 229.0,
   "end_distance_m": 279.0,
   "midpoint_distance_m": 254.0,
   "start_elevation_m": 285.32242658864914,
   "end_elevation_m": 286.9529425094546,
   "start_xy": [
    826112.9653136298,
    6492907.573417418
   ],
   "end_xy": [
    826159.7401097928,
    6492889.90654322
   ]
  },
  "min_100m": {
   "gradient_pct": 6.23947878289988,
   "start_distance_m": 207.0,
   "end_distance_m": 307.0,
   "midpoint_distance_m": 257.0,
   "start_elevation_m": 283.7249178459699,
   "end_elevation_m": 289.9643966288698,
   "start_xy": [
    826092.2738390127,
    6492915.026768222
   ],
   "end_xy": [
    826167.7689969958,
    6492865.958417918
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.71417289321016,
   "start_distance_m": 64.0,
   "end_distance_m": 66.0,
   "midpoint_distance_m": 65.0,
   "start_elevation_m": 262.5330843728399,
   "end_elevation_m": 263.0073678307041,
   "start_xy": [
    825984.8308614191,
    6493002.051477933
   ],
   "end_xy": [
    825986.2388338636,
    6493000.631050675
   ]
  },
  "max_3m": {
   "gradient_pct": 23.33992520509014,
   "start_distance_m": 64.0,
   "end_distance_m": 67.0,
   "midpoint_distance_m": 65.5,
   "start_elevation_m": 262.5330843728399,
   "end_elevation_m": 263.2332821289926,
   "start_xy": [
    825984.8308614191,
    6493002.051477933
   ],
   "end_xy": [
    825986.9428200858,
    6492999.920837047
   ]
  }
 },
 "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": 0.1,
   "obstruction_max_height_m": 15.47,
   "flagged_windows_m": []
  },
  "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_E825-N6492_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E825-N6493_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E826-N6492_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E826-N6493_0m5@22LHD4NL-2025-08-06.tif"
  ],
  "calculated_at": "2026-09-22T15:42:22+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": [
   "E825-N6492",
   "E825-N6493",
   "E826-N6492",
   "E826-N6493"
  ],
  "elevation_blocks": [
   "22LHD4NL@2025-08-06"
  ],
  "ign_dalles": [
   "LHD_FXX_0825_6493_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0825_6494_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0826_6493_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0826_6494_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD4NL"
  ],
  "ign_editions": [
   "2025-08-06"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0825_6493_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0825_6494_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0826_6493_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0826_6494_MNT_O_0M50_LAMB93_IGN69": "2025-08-06"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 19,
   "stations_resolved": 19,
   "width_median_m": 4.5,
   "width_p10_m": 3.5,
   "width_min_m": 3.25,
   "width_max_m": 11.5,
   "bounded_share": 0.263,
   "unbounded_share": 0.737,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.75,
   "window_m": [
    60.0,
    85.0
   ],
   "width_at_max25_m": 5.5,
   "window_stations": 6,
   "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": 19,
    "stations_resolved": 19,
    "width_median_m": 5.25,
    "width_p10_m": 0.95,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.842,
    "unbounded_share": 0.158,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.88,
    "window_m": [
     60.0,
     85.0
    ],
    "width_at_max25_m": 6.38,
    "window_stations": 6,
    "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": "Rive-de-Gier",
  "county": "Loire",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}