{
 "ocl_version": "0.1.0",
 "name": "Chemin du Cayre",
 "slug": "chemin-du-cayre",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.06159715065013,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 293.0,
   "end_distance_m": 295.0,
   "start_elevation_m": 175.98885554720437,
   "end_elevation_m": 176.53008749021737,
   "min_gradient_pct": -43.41450801469762
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.957793997648082,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 292.0,
   "end_distance_m": 295.0,
   "start_elevation_m": 175.75135367028793,
   "end_elevation_m": 176.53008749021737,
   "min_gradient_pct": -35.925584200759886
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.074641353232096,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 291.0,
   "end_distance_m": 296.0,
   "start_elevation_m": 175.54297307034585,
   "end_elevation_m": 176.74670513800746,
   "min_gradient_pct": -24.285466598487346
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.536341166187412,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 244.0,
   "end_distance_m": 254.0,
   "start_elevation_m": 167.61023060633033,
   "end_elevation_m": 169.86386472294907,
   "min_gradient_pct": -11.057859045395446
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.15933117892874,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 236.0,
   "end_distance_m": 256.0,
   "start_elevation_m": 165.86930424145257,
   "end_elevation_m": 170.30117047723832,
   "min_gradient_pct": -4.427669126111908
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.054668129336505,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 232.0,
   "end_distance_m": 257.0,
   "start_elevation_m": 165.00953448979388,
   "end_elevation_m": 170.523201522128,
   "min_gradient_pct": -4.299337157495188
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.095177729519264,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 207.0,
   "end_distance_m": 257.0,
   "start_elevation_m": 159.97561265736837,
   "end_elevation_m": 170.523201522128,
   "min_gradient_pct": -3.5815955806925217
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.880450188185165,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 199.0,
   "end_distance_m": 299.0,
   "start_elevation_m": 158.4775185605776,
   "end_elevation_m": 177.35796874876277,
   "min_gradient_pct": 2.9231935831626856
  }
 ],
 "shape": {
  "ascent_concentration": 0.441,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 203.0,
  "shape_class": "sustained"
 },
 "length_m": 373.2401761625529,
 "start_elevation_m": 140.05528947601732,
 "end_elevation_m": 177.09977114791747,
 "endpoint_gain_m": 37.044481671900144,
 "overall_gradient_pct": 9.925105612362211,
 "accumulated_ascent_m": 40.37167877514287,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.074641353232096,
   "start_distance_m": 291.0,
   "end_distance_m": 296.0,
   "midpoint_distance_m": 293.5,
   "start_elevation_m": 175.54297307034585,
   "end_elevation_m": 176.74670513800746,
   "start_xy": [
    598925.3495019269,
    6375265.223317932
   ],
   "end_xy": [
    598921.9801705864,
    6375268.917584615
   ]
  },
  "max_10m": {
   "gradient_pct": 22.536341166187412,
   "start_distance_m": 244.0,
   "end_distance_m": 254.0,
   "midpoint_distance_m": 249.0,
   "start_elevation_m": 167.61023060633033,
   "end_elevation_m": 169.86386472294907,
   "start_xy": [
    598950.2814432983,
    6375227.215358086
   ],
   "end_xy": [
    598948.620593548,
    6375237.076472532
   ]
  },
  "max_20m": {
   "gradient_pct": 22.15933117892874,
   "start_distance_m": 236.0,
   "end_distance_m": 256.0,
   "midpoint_distance_m": 246.0,
   "start_elevation_m": 165.86930424145257,
   "end_elevation_m": 170.30117047723832,
   "start_xy": [
    598951.6101230986,
    6375219.32646653
   ],
   "end_xy": [
    598948.288423598,
    6375239.048695421
   ]
  },
  "max_25m": {
   "gradient_pct": 22.054668129336505,
   "start_distance_m": 232.0,
   "end_distance_m": 257.0,
   "midpoint_distance_m": 244.5,
   "start_elevation_m": 165.00953448979388,
   "end_elevation_m": 170.523201522128,
   "start_xy": [
    598952.2744629987,
    6375215.382020752
   ],
   "end_xy": [
    598948.122338623,
    6375240.034806865
   ]
  },
  "max_50m": {
   "gradient_pct": 21.095177729519264,
   "start_distance_m": 207.0,
   "end_distance_m": 257.0,
   "midpoint_distance_m": 232.0,
   "start_elevation_m": 159.97561265736837,
   "end_elevation_m": 170.523201522128,
   "start_xy": [
    598957.5072218622,
    6375190.982010652
   ],
   "end_xy": [
    598948.122338623,
    6375240.034806865
   ]
  },
  "max_100m": {
   "gradient_pct": 18.880450188185165,
   "start_distance_m": 199.0,
   "end_distance_m": 299.0,
   "midpoint_distance_m": 249.0,
   "start_elevation_m": 158.4775185605776,
   "end_elevation_m": 177.35796874876277,
   "start_xy": [
    598959.8155888789,
    6375183.322282085
   ],
   "end_xy": [
    598919.9585717821,
    6375271.134144624
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -24.285466598487346,
   "start_distance_m": 300.0,
   "end_distance_m": 305.0,
   "midpoint_distance_m": 302.5,
   "start_elevation_m": 177.49292113437724,
   "end_elevation_m": 176.27864780445287,
   "start_xy": [
    598919.2815603951,
    6375271.867862087
   ],
   "end_xy": [
    598914.4594951326,
    6375273.189863071
   ]
  },
  "min_10m": {
   "gradient_pct": -11.057859045395446,
   "start_distance_m": 300.0,
   "end_distance_m": 310.0,
   "midpoint_distance_m": 305.0,
   "start_elevation_m": 177.49292113437724,
   "end_elevation_m": 176.3871352298377,
   "start_xy": [
    598919.2815603951,
    6375271.867862087
   ],
   "end_xy": [
    598909.63742987,
    6375274.511864056
   ]
  },
  "min_20m": {
   "gradient_pct": -4.427669126111908,
   "start_distance_m": 300.0,
   "end_distance_m": 320.0,
   "midpoint_distance_m": 310.0,
   "start_elevation_m": 177.49292113437724,
   "end_elevation_m": 176.60738730915486,
   "start_xy": [
    598919.2815603951,
    6375271.867862087
   ],
   "end_xy": [
    598899.9932993447,
    6375277.155866024
   ]
  },
  "min_25m": {
   "gradient_pct": -4.299337157495188,
   "start_distance_m": 300.0,
   "end_distance_m": 325.0,
   "midpoint_distance_m": 312.5,
   "start_elevation_m": 177.49292113437724,
   "end_elevation_m": 176.41808684500344,
   "start_xy": [
    598919.2815603951,
    6375271.867862087
   ],
   "end_xy": [
    598895.171234082,
    6375278.477867009
   ]
  },
  "min_50m": {
   "gradient_pct": -3.5815955806925217,
   "start_distance_m": 300.0,
   "end_distance_m": 350.0,
   "midpoint_distance_m": 325.0,
   "start_elevation_m": 177.49292113437724,
   "end_elevation_m": 175.70212334403098,
   "start_xy": [
    598919.2815603951,
    6375271.867862087
   ],
   "end_xy": [
    598870.8072292164,
    6375284.075956017
   ]
  },
  "min_100m": {
   "gradient_pct": 2.9231935831626856,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 140.05528947601732,
   "end_elevation_m": 142.97848305918,
   "start_xy": [
    598908.721,
    6375096.507
   ],
   "end_xy": [
    598980.3196321673,
    6375105.187107688
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.06159715065013,
   "start_distance_m": 293.0,
   "end_distance_m": 295.0,
   "midpoint_distance_m": 294.0,
   "start_elevation_m": 175.98885554720437,
   "end_elevation_m": 176.53008749021737,
   "start_xy": [
    598924.0017693908,
    6375266.701024605
   ],
   "end_xy": [
    598922.6540368545,
    6375268.1787312785
   ]
  },
  "max_3m": {
   "gradient_pct": 25.957793997648082,
   "start_distance_m": 292.0,
   "end_distance_m": 295.0,
   "midpoint_distance_m": 293.5,
   "start_elevation_m": 175.75135367028793,
   "end_elevation_m": 176.53008749021737,
   "start_xy": [
    598924.6756356588,
    6375265.962171269
   ],
   "end_xy": [
    598922.6540368545,
    6375268.1787312785
   ]
  }
 },
 "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": 0.213,
   "obstruction_max_height_m": 12.53,
   "flagged_windows_m": [
    2,
    3,
    5,
    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-mc2",
   "road_pbf": "block-batch-fr-mc2.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_E598-N6375_0m5@22LHD2JO-2025-06-17.tif",
   "data/cache/fr/ign-lidarhd_dtm_E599-N6375_0m5@22LHD2JO-2025-06-17.tif"
  ],
  "calculated_at": "2026-09-22T15:45:46+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc2",
  "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": [
   "E598-N6375",
   "E599-N6375"
  ],
  "elevation_blocks": [
   "22LHD2JO@2025-06-17"
  ],
  "ign_dalles": [
   "LHD_FXX_0598_6376_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0599_6376_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD2JO"
  ],
  "ign_editions": [
   "2025-06-17"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0598_6376_MNT_O_0M50_LAMB93_IGN69": "2025-06-17",
   "LHD_FXX_0599_6376_MNT_O_0M50_LAMB93_IGN69": "2025-06-17"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 21,
   "stations_resolved": 21,
   "width_median_m": 3.75,
   "width_p10_m": 2.25,
   "width_min_m": 0.5,
   "width_max_m": 12.0,
   "bounded_share": 0.429,
   "unbounded_share": 0.571,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.75,
   "window_m": [
    232.0,
    257.0
   ],
   "width_at_max25_m": 3.75,
   "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": 21,
    "stations_resolved": 21,
    "width_median_m": 4.75,
    "width_p10_m": 1.25,
    "width_min_m": 1.0,
    "width_max_m": 12.0,
    "bounded_share": 0.81,
    "unbounded_share": 0.19,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.0,
    "window_m": [
     232.0,
     257.0
    ],
    "width_at_max25_m": 6.0,
    "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": "Saint-Martin-Labouval",
  "county": "Lot",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}