{
 "ocl_version": "0.1.0",
 "name": "Chemin de Lazeraud",
 "slug": "chemin-de-lazeraud",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 41.24859286910976,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 569.0,
   "end_distance_m": 571.0,
   "start_elevation_m": 230.29421106705433,
   "end_elevation_m": 231.11918292443653,
   "min_gradient_pct": -1.9727824370121994,
   "suppressed_max_gradient_pct": 54.60054246460402,
   "suppressed_location_m": [
    564.0,
    566.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 36.067812237998474,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 581.0,
   "end_distance_m": 584.0,
   "start_elevation_m": 233.6568487388652,
   "end_elevation_m": 234.73888310600515,
   "min_gradient_pct": 0.03392510298472947,
   "suppressed_max_gradient_pct": 42.80233552170122,
   "suppressed_location_m": [
    564.0,
    567.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 34.665713535785585,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 579.0,
   "end_distance_m": 584.0,
   "start_elevation_m": 233.00559742921587,
   "end_elevation_m": 234.73888310600515,
   "min_gradient_pct": 0.9173893274714828,
   "suppressed_max_gradient_pct": 35.036946827801216,
   "suppressed_location_m": [
    562.0,
    567.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 32.17157986362366,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 577.0,
   "end_distance_m": 587.0,
   "start_elevation_m": 232.43625667340328,
   "end_elevation_m": 235.65341465976564,
   "min_gradient_pct": 1.285048554993864
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 30.60818113681904,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 579.0,
   "end_distance_m": 599.0,
   "start_elevation_m": 233.00559742921587,
   "end_elevation_m": 239.12723365657968,
   "min_gradient_pct": 1.5277639354196992
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 30.32450677413135,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 579.0,
   "end_distance_m": 604.0,
   "start_elevation_m": 233.00559742921587,
   "end_elevation_m": 240.5867241227487,
   "min_gradient_pct": 1.5900520422800355
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 26.259108223086688,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 569.0,
   "end_distance_m": 619.0,
   "start_elevation_m": 230.29421106705433,
   "end_elevation_m": 243.42376517859768,
   "min_gradient_pct": 1.8165851177317904,
   "suppressed_max_gradient_pct": 27.425476228489114,
   "suppressed_location_m": [
    560.0,
    610.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.075746730598212,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 569.0,
   "end_distance_m": 669.0,
   "start_elevation_m": 230.29421106705433,
   "end_elevation_m": 249.36995779765255,
   "min_gradient_pct": 2.3018304295215444,
   "suppressed_max_gradient_pct": 22.21588769073381,
   "suppressed_location_m": [
    525.0,
    625.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.521,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 212.0,
  "shape_class": "stepped"
 },
 "length_m": 724.7369699589008,
 "start_elevation_m": 192.49026297898868,
 "end_elevation_m": 256.124175364127,
 "endpoint_gain_m": 63.6339123851383,
 "overall_gradient_pct": 8.780276848405695,
 "accumulated_ascent_m": 63.787216579123594,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 34.665713535785585,
   "start_distance_m": 579.0,
   "end_distance_m": 584.0,
   "midpoint_distance_m": 581.5,
   "start_elevation_m": 233.00559742921587,
   "end_elevation_m": 234.73888310600515,
   "start_xy": [
    614840.6573182534,
    6268580.429512861
   ],
   "end_xy": [
    614836.5679004507,
    6268583.306431705
   ]
  },
  "max_10m": {
   "gradient_pct": 32.17157986362366,
   "start_distance_m": 577.0,
   "end_distance_m": 587.0,
   "midpoint_distance_m": 582.0,
   "start_elevation_m": 232.43625667340328,
   "end_elevation_m": 235.65341465976564,
   "start_xy": [
    614842.2930853745,
    6268579.278745323
   ],
   "end_xy": [
    614834.1142497691,
    6268585.032583012
   ]
  },
  "max_20m": {
   "gradient_pct": 30.60818113681904,
   "start_distance_m": 579.0,
   "end_distance_m": 599.0,
   "midpoint_distance_m": 589.0,
   "start_elevation_m": 233.00559742921587,
   "end_elevation_m": 239.12723365657968,
   "start_xy": [
    614840.6573182534,
    6268580.429512861
   ],
   "end_xy": [
    614825.0758554622,
    6268592.823682861
   ]
  },
  "max_25m": {
   "gradient_pct": 30.32450677413135,
   "start_distance_m": 579.0,
   "end_distance_m": 604.0,
   "midpoint_distance_m": 591.5,
   "start_elevation_m": 233.00559742921587,
   "end_elevation_m": 240.5867241227487,
   "start_xy": [
    614840.6573182534,
    6268580.429512861
   ],
   "end_xy": [
    614822.9727030891,
    6268597.351677625
   ]
  },
  "max_50m": {
   "gradient_pct": 26.259108223086688,
   "start_distance_m": 569.0,
   "end_distance_m": 619.0,
   "midpoint_distance_m": 594.0,
   "start_elevation_m": 230.29421106705433,
   "end_elevation_m": 243.42376517859768,
   "start_xy": [
    614848.8361538588,
    6268574.675675173
   ],
   "end_xy": [
    614823.4401365384,
    6268612.184991563
   ]
  },
  "max_100m": {
   "gradient_pct": 19.075746730598212,
   "start_distance_m": 569.0,
   "end_distance_m": 669.0,
   "midpoint_distance_m": 619.0,
   "start_elevation_m": 230.29421106705433,
   "end_elevation_m": 249.36995779765255,
   "start_xy": [
    614848.8361538588,
    6268574.675675173
   ],
   "end_xy": [
    614803.608657357,
    6268657.269495302
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.9173893274714828,
   "start_distance_m": 233.0,
   "end_distance_m": 238.0,
   "midpoint_distance_m": 235.5,
   "start_elevation_m": 199.411450880365,
   "end_elevation_m": 199.45732034673858,
   "start_xy": [
    614960.0746626451,
    6268333.969169004
   ],
   "end_xy": [
    614955.5787219182,
    6268336.156980006
   ]
  },
  "min_10m": {
   "gradient_pct": 1.285048554993864,
   "start_distance_m": 228.0,
   "end_distance_m": 238.0,
   "midpoint_distance_m": 233.0,
   "start_elevation_m": 199.3288154912392,
   "end_elevation_m": 199.45732034673858,
   "start_xy": [
    614964.5706033722,
    6268331.781358003
   ],
   "end_xy": [
    614955.5787219182,
    6268336.156980006
   ]
  },
  "min_20m": {
   "gradient_pct": 1.5277639354196992,
   "start_distance_m": 219.0,
   "end_distance_m": 239.0,
   "midpoint_distance_m": 229.0,
   "start_elevation_m": 199.17498927687583,
   "end_elevation_m": 199.48054206395977,
   "start_xy": [
    614972.6632966808,
    6268327.8432982
   ],
   "end_xy": [
    614954.6795337728,
    6268336.594542206
   ]
  },
  "min_25m": {
   "gradient_pct": 1.5900520422800355,
   "start_distance_m": 219.0,
   "end_distance_m": 244.0,
   "midpoint_distance_m": 231.5,
   "start_elevation_m": 199.17498927687583,
   "end_elevation_m": 199.57250228744584,
   "start_xy": [
    614972.6632966808,
    6268327.8432982
   ],
   "end_xy": [
    614950.1835930458,
    6268338.7823532075
   ]
  },
  "min_50m": {
   "gradient_pct": 1.8165851177317904,
   "start_distance_m": 208.0,
   "end_distance_m": 258.0,
   "midpoint_distance_m": 233.0,
   "start_elevation_m": 198.95377204629585,
   "end_elevation_m": 199.86206460516175,
   "start_xy": [
    614982.5984411222,
    6268323.123490523
   ],
   "end_xy": [
    614937.5949590101,
    6268344.908224013
   ]
  },
  "min_100m": {
   "gradient_pct": 2.3018304295215444,
   "start_distance_m": 186.0,
   "end_distance_m": 286.0,
   "midpoint_distance_m": 236.0,
   "start_elevation_m": 198.27342595320454,
   "end_elevation_m": 200.57525638272608,
   "start_xy": [
    615003.5347090879,
    6268316.684773145
   ],
   "end_xy": [
    614914.974194355,
    6268360.037058994
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 41.24859286910976,
   "start_distance_m": 569.0,
   "end_distance_m": 571.0,
   "midpoint_distance_m": 570.0,
   "start_elevation_m": 230.29421106705433,
   "end_elevation_m": 231.11918292443653,
   "start_xy": [
    614848.8361538588,
    6268574.675675173
   ],
   "end_xy": [
    614847.2003867377,
    6268575.826442711
   ]
  },
  "max_3m": {
   "gradient_pct": 36.067812237998474,
   "start_distance_m": 581.0,
   "end_distance_m": 584.0,
   "midpoint_distance_m": 582.5,
   "start_elevation_m": 233.6568487388652,
   "end_elevation_m": 234.73888310600515,
   "start_xy": [
    614839.0215511323,
    6268581.580280399
   ],
   "end_xy": [
    614836.5679004507,
    6268583.306431705
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.008,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    50.0,
    100.0
   ],
   "windows_unresolved": [],
   "minima_resited": [],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.32,
   "obstruction_max_height_m": 12.06,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    562.0,
    567.0
   ]
  ],
  "review": [],
  "extent": [
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "06fa4c370391597f015858e97dcf01ca2f5b3640",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:0048c2bbb24ab95e",
   "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-pyr3",
   "road_pbf": "block-batch-fr-pyr3.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": "sha256:79dd257545ed11dc"
  },
  "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_E614-N6268_0m5@21LHD3JQ-2025-03-14.tif",
   "data/cache/fr/ign-lidarhd_dtm_E615-N6268_0m5@21LHD3JQ-2025-03-14.tif"
  ],
  "calculated_at": "2026-09-20T07:51:35+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pyr3",
  "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": [
   "E614-N6268",
   "E615-N6268"
  ],
  "elevation_blocks": [
   "21LHD3JQ@2025-03-14"
  ],
  "ign_dalles": [
   "LHD_FXX_0614_6269_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0615_6269_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD3JQ"
  ],
  "ign_editions": [
   "2025-03-14"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0614_6269_MNT_O_0M50_LAMB93_IGN69": "2025-03-14",
   "LHD_FXX_0615_6269_MNT_O_0M50_LAMB93_IGN69": "2025-03-14"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 35,
   "stations_resolved": 35,
   "width_median_m": 5.0,
   "width_p10_m": 2.35,
   "width_min_m": 1.75,
   "width_max_m": 12.0,
   "bounded_share": 0.257,
   "unbounded_share": 0.743,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.75,
   "window_m": [
    579.0,
    604.0
   ],
   "width_at_max25_m": 3.5,
   "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": 35,
    "stations_resolved": 35,
    "width_median_m": 3.0,
    "width_p10_m": 0.7,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.914,
    "unbounded_share": 0.086,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.88,
    "window_m": [
     579.0,
     604.0
    ],
    "width_at_max25_m": 2.0,
    "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": "Montgey",
  "county": "Tarn",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}