{
 "ocl_version": "0.1.0",
 "name": "Chemin Rural de Montreynaud",
 "slug": "chemin-rural-de-montreynaud",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 33.566542234143526,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 311.0,
   "end_distance_m": 313.0,
   "start_elevation_m": 539.4343842314576,
   "end_elevation_m": 540.1057150761404,
   "min_gradient_pct": -2.120878423141903
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.352724319493518,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 306.0,
   "end_distance_m": 309.0,
   "start_elevation_m": 538.3543920809011,
   "end_elevation_m": 539.2649738104859,
   "min_gradient_pct": 0.10234808416574499
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.3355082553212,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 304.0,
   "end_distance_m": 309.0,
   "start_elevation_m": 537.8981983977199,
   "end_elevation_m": 539.2649738104859,
   "min_gradient_pct": 0.9689258581715876
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.435510190295417,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 299.0,
   "end_distance_m": 309.0,
   "start_elevation_m": 536.8214227914564,
   "end_elevation_m": 539.2649738104859,
   "min_gradient_pct": 2.1354509879643047
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.17224646781574,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 293.0,
   "end_distance_m": 313.0,
   "start_elevation_m": 535.6712657825773,
   "end_elevation_m": 540.1057150761404,
   "min_gradient_pct": 2.8503806820111777
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.199919886863427,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 288.0,
   "end_distance_m": 313.0,
   "start_elevation_m": 534.8057351044246,
   "end_elevation_m": 540.1057150761404,
   "min_gradient_pct": 3.2718768727822862
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.225294864721945,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 286.0,
   "end_distance_m": 336.0,
   "start_elevation_m": 534.5808916435733,
   "end_elevation_m": 542.6935390759343,
   "min_gradient_pct": 3.7449895350523548
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 12.610511521860076,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 235.0,
   "end_distance_m": 335.0,
   "start_elevation_m": 529.9546122243479,
   "end_elevation_m": 542.565123746208,
   "min_gradient_pct": 4.244899161573926
  }
 ],
 "shape": {
  "ascent_concentration": 0.392,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 61.0,
  "shape_class": "sustained"
 },
 "length_m": 364.9767897854819,
 "start_elevation_m": 513.6933860131451,
 "end_elevation_m": 543.8457278574613,
 "endpoint_gain_m": 30.152341844316197,
 "overall_gradient_pct": 8.261440915746583,
 "accumulated_ascent_m": 30.38081591509649,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.3355082553212,
   "start_distance_m": 304.0,
   "end_distance_m": 309.0,
   "midpoint_distance_m": 306.5,
   "start_elevation_m": 537.8981983977199,
   "end_elevation_m": 539.2649738104859,
   "start_xy": [
    809815.9208533587,
    6486147.149128595
   ],
   "end_xy": [
    809814.612226448,
    6486151.974840524
   ]
  },
  "max_10m": {
   "gradient_pct": 24.435510190295417,
   "start_distance_m": 299.0,
   "end_distance_m": 309.0,
   "midpoint_distance_m": 304.0,
   "start_elevation_m": 536.8214227914564,
   "end_elevation_m": 539.2649738104859,
   "start_xy": [
    809817.2294802694,
    6486142.323416668
   ],
   "end_xy": [
    809814.612226448,
    6486151.974840524
   ]
  },
  "max_20m": {
   "gradient_pct": 22.17224646781574,
   "start_distance_m": 293.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 303.0,
   "start_elevation_m": 535.6712657825773,
   "end_elevation_m": 540.1057150761404,
   "start_xy": [
    809817.8239421258,
    6486136.537042365
   ],
   "end_xy": [
    809813.5653249194,
    6486155.835410066
   ]
  },
  "max_25m": {
   "gradient_pct": 21.199919886863427,
   "start_distance_m": 288.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 300.5,
   "start_elevation_m": 534.8057351044246,
   "end_elevation_m": 540.1057150761404,
   "start_xy": [
    809816.471064613,
    6486131.723548578
   ],
   "end_xy": [
    809813.5653249194,
    6486155.835410066
   ]
  },
  "max_50m": {
   "gradient_pct": 16.225294864721945,
   "start_distance_m": 286.0,
   "end_distance_m": 336.0,
   "midpoint_distance_m": 311.0,
   "start_elevation_m": 534.5808916435733,
   "end_elevation_m": 542.6935390759343,
   "start_xy": [
    809817.2339928445,
    6486129.912215893
   ],
   "end_xy": [
    809800.8165555518,
    6486174.938706241
   ]
  },
  "max_100m": {
   "gradient_pct": 12.610511521860076,
   "start_distance_m": 235.0,
   "end_distance_m": 335.0,
   "midpoint_distance_m": 285.0,
   "start_elevation_m": 529.9546122243479,
   "end_elevation_m": 542.565123746208,
   "start_xy": [
    809839.347504584,
    6486083.955795248
   ],
   "end_xy": [
    809801.3610446914,
    6486174.099938349
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 0.9689258581715876,
   "start_distance_m": 343.0,
   "end_distance_m": 348.0,
   "midpoint_distance_m": 345.5,
   "start_elevation_m": 543.14668152228,
   "end_elevation_m": 543.1951278151886,
   "start_xy": [
    809796.223471943,
    6486180.213390215
   ],
   "end_xy": [
    809792.8957630089,
    6486183.945193164
   ]
  },
  "min_10m": {
   "gradient_pct": 2.1354509879643047,
   "start_distance_m": 343.0,
   "end_distance_m": 353.0,
   "midpoint_distance_m": 348.0,
   "start_elevation_m": 543.14668152228,
   "end_elevation_m": 543.3602266210764,
   "start_xy": [
    809796.223471943,
    6486180.213390215
   ],
   "end_xy": [
    809789.5680540745,
    6486187.676996113
   ]
  },
  "min_20m": {
   "gradient_pct": 2.8503806820111777,
   "start_distance_m": 341.0,
   "end_distance_m": 361.0,
   "midpoint_distance_m": 351.0,
   "start_elevation_m": 543.0707852573125,
   "end_elevation_m": 543.6408613937148,
   "start_xy": [
    809797.5545555168,
    6486178.720669036
   ],
   "end_xy": [
    809784.2437197798,
    6486193.647880831
   ]
  },
  "min_25m": {
   "gradient_pct": 3.2718768727822862,
   "start_distance_m": 339.0,
   "end_distance_m": 364.0,
   "midpoint_distance_m": 351.5,
   "start_elevation_m": 542.9591756404229,
   "end_elevation_m": 543.7771448586185,
   "start_xy": [
    809798.8856390906,
    6486177.227947856
   ],
   "end_xy": [
    809782.2470944192,
    6486195.8869626
   ]
  },
  "min_50m": {
   "gradient_pct": 3.7449895350523548,
   "start_distance_m": 38.0,
   "end_distance_m": 88.0,
   "midpoint_distance_m": 63.0,
   "start_elevation_m": 515.6146464588583,
   "end_elevation_m": 517.4871412263844,
   "start_xy": [
    809868.277700209,
    6485890.877297411
   ],
   "end_xy": [
    809866.4453967286,
    6485940.832371151
   ]
  },
  "min_100m": {
   "gradient_pct": 4.244899161573926,
   "start_distance_m": 6.0,
   "end_distance_m": 106.0,
   "midpoint_distance_m": 56.0,
   "start_elevation_m": 514.0720707805267,
   "end_elevation_m": 518.3169699421006,
   "start_xy": [
    809870.8783737172,
    6485858.983152223
   ],
   "end_xy": [
    809865.9680832501,
    6485958.826041479
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 33.566542234143526,
   "start_distance_m": 311.0,
   "end_distance_m": 313.0,
   "midpoint_distance_m": 312.0,
   "start_elevation_m": 539.4343842314576,
   "end_elevation_m": 540.1057150761404,
   "start_xy": [
    809814.0887756837,
    6486153.905125295
   ],
   "end_xy": [
    809813.5653249194,
    6486155.835410066
   ]
  },
  "max_3m": {
   "gradient_pct": 30.352724319493518,
   "start_distance_m": 306.0,
   "end_distance_m": 309.0,
   "midpoint_distance_m": 307.5,
   "start_elevation_m": 538.3543920809011,
   "end_elevation_m": 539.2649738104859,
   "start_xy": [
    809815.3974025944,
    6486149.0794133665
   ],
   "end_xy": [
    809814.612226448,
    6486151.974840524
   ]
  }
 },
 "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": 0.342,
   "obstruction_max_height_m": 15.07,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": []
 },
 "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-mc7",
   "road_pbf": "block-batch-fr-mc7.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_E809-N6485_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E809-N6486_0m5@22LHD4NL-2025-08-06.tif"
  ],
  "calculated_at": "2026-09-22T14:56:57+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc7.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc7",
  "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": [
   "E809-N6485",
   "E809-N6486"
  ],
  "elevation_blocks": [
   "22LHD4NL@2025-08-06"
  ],
  "ign_dalles": [
   "LHD_FXX_0809_6486_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0809_6487_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD4NL"
  ],
  "ign_editions": [
   "2025-08-06"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0809_6486_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0809_6487_MNT_O_0M50_LAMB93_IGN69": "2025-08-06"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 21,
   "stations_resolved": 21,
   "width_median_m": 3.75,
   "width_p10_m": 2.5,
   "width_min_m": 1.25,
   "width_max_m": 10.5,
   "bounded_share": 0.381,
   "unbounded_share": 0.619,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.12,
   "window_m": [
    288.0,
    313.0
   ],
   "width_at_max25_m": 3.25,
   "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": 3.75,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 11.25,
    "bounded_share": 0.762,
    "unbounded_share": 0.238,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.25,
    "window_m": [
     288.0,
     313.0
    ],
    "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": "Saint-\u00c9tienne",
  "county": "Loire",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}