{
 "ocl_version": "0.1.0",
 "name": "Chemin du Col de Farran",
 "slug": "chemin-du-col-de-farran",
 "confidence": "U",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 45.886286948928046,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 254.0,
   "end_distance_m": 256.0,
   "start_elevation_m": 232.41941143076616,
   "end_elevation_m": 233.33713716974472,
   "min_gradient_pct": -12.490092941591513
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 45.516126145008684,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 253.0,
   "end_distance_m": 256.0,
   "start_elevation_m": 231.97165338539446,
   "end_elevation_m": 233.33713716974472,
   "min_gradient_pct": -8.03910204412072
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 42.36366414644408,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 252.0,
   "end_distance_m": 257.0,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 233.6726894521629,
   "min_gradient_pct": -4.902686366294802
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 31.131331210787323,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 252.0,
   "end_distance_m": 262.0,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 234.66763936591943,
   "min_gradient_pct": -4.548942896114738
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.604806109907514,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 252.0,
   "end_distance_m": 272.0,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 236.6754674668222,
   "min_gradient_pct": -3.3528632100266975
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.03089715303952,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 252.0,
   "end_distance_m": 277.0,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 237.56223053310057,
   "min_gradient_pct": -2.971875367754592
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.774793137259508,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 252.0,
   "end_distance_m": 302.0,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 241.44190281347045,
   "min_gradient_pct": -2.6293049062284126
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.124158044498756,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 252.0,
   "end_distance_m": 352.0,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 247.67866428933945,
   "min_gradient_pct": 0.11941482240607115
  }
 ],
 "shape": {
  "ascent_concentration": 0.476,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 143.0,
  "shape_class": "stepped"
 },
 "length_m": 556.6112354443269,
 "start_elevation_m": 223.24488684961014,
 "end_elevation_m": 264.4625699157966,
 "endpoint_gain_m": 41.21768306618648,
 "overall_gradient_pct": 7.405111582644138,
 "accumulated_ascent_m": 43.798040364091435,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 42.36366414644408,
   "start_distance_m": 252.0,
   "end_distance_m": 257.0,
   "midpoint_distance_m": 254.5,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 233.6726894521629,
   "start_xy": [
    713309.363270746,
    6278516.970120298
   ],
   "end_xy": [
    713304.427222826,
    6278516.172981081
   ]
  },
  "max_10m": {
   "gradient_pct": 31.131331210787323,
   "start_distance_m": 252.0,
   "end_distance_m": 262.0,
   "midpoint_distance_m": 257.0,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 234.66763936591943,
   "start_xy": [
    713309.363270746,
    6278516.970120298
   ],
   "end_xy": [
    713301.0904170753,
    6278512.563364226
   ]
  },
  "max_20m": {
   "gradient_pct": 25.604806109907514,
   "start_distance_m": 252.0,
   "end_distance_m": 272.0,
   "midpoint_distance_m": 262.0,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 236.6754674668222,
   "start_xy": [
    713309.363270746,
    6278516.970120298
   ],
   "end_xy": [
    713294.6723741998,
    6278504.894679486
   ]
  },
  "max_25m": {
   "gradient_pct": 24.03089715303952,
   "start_distance_m": 252.0,
   "end_distance_m": 277.0,
   "midpoint_distance_m": 264.5,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 237.56223053310057,
   "start_xy": [
    713309.363270746,
    6278516.970120298
   ],
   "end_xy": [
    713292.245743186,
    6278500.538375359
   ]
  },
  "max_50m": {
   "gradient_pct": 19.774793137259508,
   "start_distance_m": 252.0,
   "end_distance_m": 302.0,
   "midpoint_distance_m": 277.0,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 241.44190281347045,
   "start_xy": [
    713309.363270746,
    6278516.970120298
   ],
   "end_xy": [
    713281.3814629118,
    6278478.047233081
   ]
  },
  "max_100m": {
   "gradient_pct": 16.124158044498756,
   "start_distance_m": 252.0,
   "end_distance_m": 352.0,
   "midpoint_distance_m": 302.0,
   "start_elevation_m": 231.5545062448407,
   "end_elevation_m": 247.67866428933945,
   "start_xy": [
    713309.363270746,
    6278516.970120298
   ],
   "end_xy": [
    713260.2853767591,
    6278433.25184486
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -4.902686366294802,
   "start_distance_m": 4.0,
   "end_distance_m": 9.0,
   "midpoint_distance_m": 6.5,
   "start_elevation_m": 223.08931022953988,
   "end_elevation_m": 222.84417591122514,
   "start_xy": [
    713390.8945310499,
    6278521.317991034
   ],
   "end_xy": [
    713390.2691192334,
    6278526.179002866
   ]
  },
  "min_10m": {
   "gradient_pct": -4.548942896114738,
   "start_distance_m": 2.0,
   "end_distance_m": 12.0,
   "midpoint_distance_m": 7.0,
   "start_elevation_m": 223.1732552723724,
   "end_elevation_m": 222.7183609827609,
   "start_xy": [
    713390.898765525,
    6278519.3179955175
   ],
   "end_xy": [
    713388.9845287566,
    6278528.890059359
   ]
  },
  "min_20m": {
   "gradient_pct": -3.3528632100266975,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 223.24488684961014,
   "end_elevation_m": 222.5743142076048,
   "start_xy": [
    713390.903,
    6278517.318
   ],
   "end_xy": [
    713383.7039919342,
    6278534.808501757
   ]
  },
  "min_25m": {
   "gradient_pct": -2.971875367754592,
   "start_distance_m": 531.0,
   "end_distance_m": 556.0,
   "midpoint_distance_m": 543.5,
   "start_elevation_m": 265.2323016604046,
   "end_elevation_m": 264.4893328184659,
   "start_xy": [
    713153.1057107328,
    6278291.212649605
   ],
   "end_xy": [
    713134.3534810966,
    6278274.679232424
   ]
  },
  "min_50m": {
   "gradient_pct": -2.6293049062284126,
   "start_distance_m": 506.0,
   "end_distance_m": 556.0,
   "midpoint_distance_m": 531.0,
   "start_elevation_m": 265.80398527158013,
   "end_elevation_m": 264.4893328184659,
   "start_xy": [
    713167.59260178,
    6278311.585951056
   ],
   "end_xy": [
    713134.3534810966,
    6278274.679232424
   ]
  },
  "min_100m": {
   "gradient_pct": 0.11941482240607115,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 223.24488684961014,
   "end_elevation_m": 223.3643016720162,
   "start_xy": [
    713390.903,
    6278517.318
   ],
   "end_xy": [
    713330.3160760886,
    6278593.91322483
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 45.886286948928046,
   "start_distance_m": 254.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 255.0,
   "start_elevation_m": 232.41941143076616,
   "end_elevation_m": 233.33713716974472,
   "start_xy": [
    713307.388851578,
    6278516.651264611
   ],
   "end_xy": [
    713305.41443241,
    6278516.332408924
   ]
  },
  "max_3m": {
   "gradient_pct": 45.516126145008684,
   "start_distance_m": 253.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 254.5,
   "start_elevation_m": 231.97165338539446,
   "end_elevation_m": 233.33713716974472,
   "start_xy": [
    713308.376061162,
    6278516.810692455
   ],
   "end_xy": [
    713305.41443241,
    6278516.332408924
   ]
  }
 },
 "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": 0.039,
   "obstruction_max_height_m": 8.92,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20
   ]
  },
  "review": [
   "short_window_divergence"
  ],
  "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-mc5",
   "road_pbf": "block-batch-fr-mc5.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_E713-N6278_0m5@21LHD3LQ-2025-05-19.tif"
  ],
  "calculated_at": "2026-09-22T15:54:52+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc5.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc5",
  "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": [
   "E713-N6278"
  ],
  "elevation_blocks": [
   "21LHD3LQ@2025-05-19"
  ],
  "ign_dalles": [
   "LHD_FXX_0713_6279_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD3LQ"
  ],
  "ign_editions": [
   "2025-05-19"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0713_6279_MNT_O_0M50_LAMB93_IGN69": "2025-05-19"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 29,
   "stations_resolved": 29,
   "width_median_m": 5.5,
   "width_p10_m": 3.1,
   "width_min_m": 1.5,
   "width_max_m": 12.0,
   "bounded_share": 0.172,
   "unbounded_share": 0.828,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.5,
   "window_m": [
    252.0,
    277.0
   ],
   "width_at_max25_m": 4.0,
   "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": 29,
    "stations_resolved": 29,
    "width_median_m": 6.25,
    "width_p10_m": 1.7,
    "width_min_m": 1.0,
    "width_max_m": 12.0,
    "bounded_share": 0.655,
    "unbounded_share": 0.345,
    "confidence_median": 1.0,
    "width_median_bounded_m": 4.0,
    "window_m": [
     252.0,
     277.0
    ],
    "width_at_max25_m": 3.0,
    "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": "B\u00e9darieux",
  "county": "H\u00e9rault",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}