{
 "ocl_version": "0.1.0",
 "name": "Chemin du Salet",
 "slug": "chemin-du-salet",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.047153889309868,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 287.0,
   "end_distance_m": 289.0,
   "start_elevation_m": 243.5382659993512,
   "end_elevation_m": 243.9992090771374,
   "min_gradient_pct": -10.175263087631947
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.399977720147035,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 287.0,
   "end_distance_m": 290.0,
   "start_elevation_m": 243.5382659993512,
   "end_elevation_m": 244.21026533095562,
   "min_gradient_pct": -9.713347709409467
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.26987156776147,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 284.0,
   "end_distance_m": 289.0,
   "start_elevation_m": 242.88571549874933,
   "end_elevation_m": 243.9992090771374,
   "min_gradient_pct": -9.428642582453222
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.931385554940164,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 283.0,
   "end_distance_m": 293.0,
   "start_elevation_m": 242.67258937346975,
   "end_elevation_m": 244.86572792896376,
   "min_gradient_pct": -8.08436500664925
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.330026268236253,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 280.0,
   "end_distance_m": 300.0,
   "start_elevation_m": 242.04611630804166,
   "end_elevation_m": 246.3121215616889,
   "min_gradient_pct": -7.16484014241928
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.134119595810148,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 279.0,
   "end_distance_m": 304.0,
   "start_elevation_m": 241.83727876437402,
   "end_elevation_m": 247.12080866332656,
   "min_gradient_pct": -6.578823202395597
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.639995462825254,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 273.0,
   "end_distance_m": 323.0,
   "start_elevation_m": 240.75598843494924,
   "end_elevation_m": 250.57598616636187,
   "min_gradient_pct": -4.199998312375044
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.13701425112123,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 252.0,
   "end_distance_m": 352.0,
   "start_elevation_m": 238.20571385953485,
   "end_elevation_m": 254.34272811065608,
   "min_gradient_pct": -2.174560474450601
  }
 ],
 "shape": {
  "ascent_concentration": 0.526,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 99.0,
  "shape_class": "stepped"
 },
 "length_m": 369.3385704765845,
 "start_elevation_m": 228.79001219543,
 "end_elevation_m": 255.80854442230836,
 "endpoint_gain_m": 27.018532226878364,
 "overall_gradient_pct": 7.315383332971257,
 "accumulated_ascent_m": 29.484055603539645,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.26987156776147,
   "start_distance_m": 284.0,
   "end_distance_m": 289.0,
   "midpoint_distance_m": 286.5,
   "start_elevation_m": 242.88571549874933,
   "end_elevation_m": 243.9992090771374,
   "start_xy": [
    820101.1727131119,
    6353069.007545076
   ],
   "end_xy": [
    820096.2359544714,
    6353068.278126861
   ]
  },
  "max_10m": {
   "gradient_pct": 21.931385554940164,
   "start_distance_m": 283.0,
   "end_distance_m": 293.0,
   "midpoint_distance_m": 288.0,
   "start_elevation_m": 242.67258937346975,
   "end_elevation_m": 244.86572792896376,
   "start_xy": [
    820102.1683682328,
    6353069.100662637
   ],
   "end_xy": [
    820092.3314173092,
    6353067.409455721
   ]
  },
  "max_20m": {
   "gradient_pct": 21.330026268236253,
   "start_distance_m": 280.0,
   "end_distance_m": 300.0,
   "midpoint_distance_m": 290.0,
   "start_elevation_m": 242.04611630804166,
   "end_elevation_m": 246.3121215616889,
   "start_xy": [
    820105.1548048009,
    6353069.385529948
   ],
   "end_xy": [
    820085.4984772756,
    6353065.889281226
   ]
  },
  "max_25m": {
   "gradient_pct": 21.134119595810148,
   "start_distance_m": 279.0,
   "end_distance_m": 304.0,
   "midpoint_distance_m": 291.5,
   "start_elevation_m": 241.83727876437402,
   "end_elevation_m": 247.12080866332656,
   "start_xy": [
    820106.150012347,
    6353069.483315121
   ],
   "end_xy": [
    820081.6802786451,
    6353064.752956982
   ]
  },
  "max_50m": {
   "gradient_pct": 19.639995462825254,
   "start_distance_m": 273.0,
   "end_distance_m": 323.0,
   "midpoint_distance_m": 298.0,
   "start_elevation_m": 240.75598843494924,
   "end_elevation_m": 250.57598616636187,
   "start_xy": [
    820112.1212576235,
    6353070.070026164
   ],
   "end_xy": [
    820064.2185625315,
    6353057.263733366
   ]
  },
  "max_100m": {
   "gradient_pct": 16.13701425112123,
   "start_distance_m": 252.0,
   "end_distance_m": 352.0,
   "midpoint_distance_m": 302.0,
   "start_elevation_m": 238.20571385953485,
   "end_elevation_m": 254.34272811065608,
   "start_xy": [
    820132.7587468331,
    6353073.907568248
   ],
   "end_xy": [
    820041.6667566798,
    6353039.171656473
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -9.428642582453222,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 228.79001219543,
   "end_elevation_m": 228.31858006630733,
   "start_xy": [
    820380.185,
    6353055.361
   ],
   "end_xy": [
    820375.1919157095,
    6353055.098113584
   ]
  },
  "min_10m": {
   "gradient_pct": -8.08436500664925,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 228.79001219543,
   "end_elevation_m": 227.98157569476507,
   "start_xy": [
    820380.185,
    6353055.361
   ],
   "end_xy": [
    820370.1988314189,
    6353054.835227169
   ]
  },
  "min_20m": {
   "gradient_pct": -7.16484014241928,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 228.79001219543,
   "end_elevation_m": 227.35704416694614,
   "start_xy": [
    820380.185,
    6353055.361
   ],
   "end_xy": [
    820360.2138765897,
    6353054.298874736
   ]
  },
  "min_25m": {
   "gradient_pct": -6.578823202395597,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 228.79001219543,
   "end_elevation_m": 227.1453063948311,
   "start_xy": [
    820380.185,
    6353055.361
   ],
   "end_xy": [
    820355.2909864738,
    6353053.424144545
   ]
  },
  "min_50m": {
   "gradient_pct": -4.199998312375044,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 228.79001219543,
   "end_elevation_m": 226.69001303924247,
   "start_xy": [
    820380.185,
    6353055.361
   ],
   "end_xy": [
    820330.4383595651,
    6353052.992185922
   ]
  },
  "min_100m": {
   "gradient_pct": -2.174560474450601,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 228.79001219543,
   "end_elevation_m": 226.6154517209794,
   "start_xy": [
    820380.185,
    6353055.361
   ],
   "end_xy": [
    820280.9052626598,
    6353059.324074421
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.047153889309868,
   "start_distance_m": 287.0,
   "end_distance_m": 289.0,
   "midpoint_distance_m": 288.0,
   "start_elevation_m": 243.5382659993512,
   "end_elevation_m": 243.9992090771374,
   "start_xy": [
    820098.1882230525,
    6353068.712462431
   ],
   "end_xy": [
    820096.2359544714,
    6353068.278126861
   ]
  },
  "max_3m": {
   "gradient_pct": 22.399977720147035,
   "start_distance_m": 287.0,
   "end_distance_m": 290.0,
   "midpoint_distance_m": 288.5,
   "start_elevation_m": 243.5382659993512,
   "end_elevation_m": 244.21026533095562,
   "start_xy": [
    820098.1882230525,
    6353068.712462431
   ],
   "end_xy": [
    820095.259820181,
    6353068.0609590765
   ]
  }
 },
 "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": 12.72,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    100
   ]
  },
  "review": [],
  "extent": [
   "descends_at_start",
   "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_E820-N6353_0m5@22LHD5NO-2025-04-22.tif"
  ],
  "calculated_at": "2026-09-22T14:49:19+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": [
   "E820-N6353"
  ],
  "elevation_blocks": [
   "22LHD5NO@2025-04-22"
  ],
  "ign_dalles": [
   "LHD_FXX_0820_6354_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD5NO"
  ],
  "ign_editions": [
   "2025-04-22"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0820_6354_MNT_O_0M50_LAMB93_IGN69": "2025-04-22"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 21,
   "stations_resolved": 21,
   "width_median_m": 4.25,
   "width_p10_m": 3.0,
   "width_min_m": 2.5,
   "width_max_m": 8.5,
   "bounded_share": 0.476,
   "unbounded_share": 0.524,
   "confidence_median": 0.0,
   "width_median_bounded_m": 4.12,
   "window_m": [
    279.0,
    304.0
   ],
   "width_at_max25_m": 5.25,
   "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": 21,
    "stations_resolved": 21,
    "width_median_m": 3.25,
    "width_p10_m": 0.75,
    "width_min_m": 0.5,
    "width_max_m": 7.75,
    "bounded_share": 0.952,
    "unbounded_share": 0.048,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.88,
    "window_m": [
     279.0,
     304.0
    ],
    "width_at_max25_m": 2.25,
    "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": "Saint-Christol-de-Rodi\u00e8res",
  "county": "Gard",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}