{
 "ocl_version": "0.1.0",
 "name": "Chemin de Martinon",
 "slug": "chemin-de-martinon",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 22.56808889788058,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 46.0,
   "end_distance_m": 48.0,
   "start_elevation_m": 12.420204016982785,
   "end_elevation_m": 12.871565794940397,
   "min_gradient_pct": -15.216811298216992
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.396583036950272,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 46.0,
   "end_distance_m": 49.0,
   "start_elevation_m": 12.420204016982785,
   "end_elevation_m": 13.092101508091293,
   "min_gradient_pct": -7.708983623072581
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.172006724797377,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 46.0,
   "end_distance_m": 51.0,
   "start_elevation_m": 12.420204016982785,
   "end_elevation_m": 13.528804353222654,
   "min_gradient_pct": -2.17181148079165
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.71915950922271,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 43.0,
   "end_distance_m": 53.0,
   "start_elevation_m": 11.788927295313972,
   "end_elevation_m": 13.960843246236243,
   "min_gradient_pct": 1.853757302400254
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 20.651646030786157,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 43.0,
   "end_distance_m": 63.0,
   "start_elevation_m": 11.788927295313972,
   "end_elevation_m": 15.919256501471203,
   "min_gradient_pct": 2.974495508250925
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.228738398809284,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 42.0,
   "end_distance_m": 67.0,
   "start_elevation_m": 11.595423498339123,
   "end_elevation_m": 16.652608098041444,
   "min_gradient_pct": 3.1932801267171556
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.976922925825235,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 110.0,
   "end_distance_m": 160.0,
   "start_elevation_m": 22.567122190226577,
   "end_elevation_m": 31.555583653139195,
   "min_gradient_pct": 4.625987628110437
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.903789742779985,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 40.0,
   "end_distance_m": 140.0,
   "start_elevation_m": 11.234947659767782,
   "end_elevation_m": 28.13873740254777,
   "min_gradient_pct": 8.909427790097702
  }
 ],
 "shape": {
  "ascent_concentration": 0.336,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 201.0,
  "shape_class": "sustained"
 },
 "length_m": 264.49785462694547,
 "start_elevation_m": 7.361819330732651,
 "end_elevation_m": 41.10955861247349,
 "endpoint_gain_m": 33.74773928174084,
 "overall_gradient_pct": 12.75917316204304,
 "accumulated_ascent_m": 34.05654974429197,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.172006724797377,
   "start_distance_m": 46.0,
   "end_distance_m": 51.0,
   "midpoint_distance_m": 48.5,
   "start_elevation_m": 12.420204016982785,
   "end_elevation_m": 13.528804353222654,
   "start_xy": [
    366808.6408738058,
    6272827.234187289
   ],
   "end_xy": [
    366803.71377982775,
    6272827.11407195
   ]
  },
  "max_10m": {
   "gradient_pct": 21.71915950922271,
   "start_distance_m": 43.0,
   "end_distance_m": 53.0,
   "midpoint_distance_m": 48.0,
   "start_elevation_m": 11.788927295313972,
   "end_elevation_m": 13.960843246236243,
   "start_xy": [
    366811.63221030857,
    6272827.006358566
   ],
   "end_xy": [
    366801.80844562565,
    6272826.506041048
   ]
  },
  "max_20m": {
   "gradient_pct": 20.651646030786157,
   "start_distance_m": 43.0,
   "end_distance_m": 63.0,
   "midpoint_distance_m": 53.0,
   "start_elevation_m": 11.788927295313972,
   "end_elevation_m": 15.919256501471203,
   "start_xy": [
    366811.63221030857,
    6272827.006358566
   ],
   "end_xy": [
    366793.3604962791,
    6272821.645043954
   ]
  },
  "max_25m": {
   "gradient_pct": 20.228738398809284,
   "start_distance_m": 42.0,
   "end_distance_m": 67.0,
   "midpoint_distance_m": 54.5,
   "start_elevation_m": 11.595423498339123,
   "end_elevation_m": 16.652608098041444,
   "start_xy": [
    366812.62932247616,
    6272826.930415658
   ],
   "end_xy": [
    366790.4632600277,
    6272818.887142196
   ]
  },
  "max_50m": {
   "gradient_pct": 17.976922925825235,
   "start_distance_m": 110.0,
   "end_distance_m": 160.0,
   "midpoint_distance_m": 135.0,
   "start_elevation_m": 22.567122190226577,
   "end_elevation_m": 31.555583653139195,
   "start_xy": [
    366783.9066301098,
    6272777.696669883
   ],
   "end_xy": [
    366740.22274751496,
    6272754.063579561
   ]
  },
  "max_100m": {
   "gradient_pct": 16.903789742779985,
   "start_distance_m": 40.0,
   "end_distance_m": 140.0,
   "midpoint_distance_m": 90.0,
   "start_elevation_m": 11.234947659767782,
   "end_elevation_m": 28.13873740254777,
   "start_xy": [
    366814.56743855705,
    6272826.613811552
   ],
   "end_xy": [
    366757.9819163552,
    6272763.262053462
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.17181148079165,
   "start_distance_m": 7.0,
   "end_distance_m": 12.0,
   "midpoint_distance_m": 9.5,
   "start_elevation_m": 7.9136108694188385,
   "end_elevation_m": 7.805020295379256,
   "start_xy": [
    366841.2098989002,
    6272807.214171528
   ],
   "end_xy": [
    366837.3307131996,
    6272810.368837643
   ]
  },
  "min_10m": {
   "gradient_pct": 1.853757302400254,
   "start_distance_m": 242.0,
   "end_distance_m": 252.0,
   "midpoint_distance_m": 247.0,
   "start_elevation_m": 40.248563932831644,
   "end_elevation_m": 40.43393966307167,
   "start_xy": [
    366741.36527573754,
    6272689.684721243
   ],
   "end_xy": [
    366747.1661507449,
    6272681.539179569
   ]
  },
  "min_20m": {
   "gradient_pct": 2.974495508250925,
   "start_distance_m": 233.0,
   "end_distance_m": 253.0,
   "midpoint_distance_m": 243.0,
   "start_elevation_m": 39.85841259822373,
   "end_elevation_m": 40.453311699873915,
   "start_xy": [
    366736.1444882309,
    6272697.015708748
   ],
   "end_xy": [
    366747.7462382456,
    6272680.724625402
   ]
  },
  "min_25m": {
   "gradient_pct": 3.1932801267171556,
   "start_distance_m": 228.0,
   "end_distance_m": 253.0,
   "midpoint_distance_m": 240.5,
   "start_elevation_m": 39.654991668194626,
   "end_elevation_m": 40.453311699873915,
   "start_xy": [
    366733.2440507272,
    6272701.088479585
   ],
   "end_xy": [
    366747.7462382456,
    6272680.724625402
   ]
  },
  "min_50m": {
   "gradient_pct": 4.625987628110437,
   "start_distance_m": 214.0,
   "end_distance_m": 264.0,
   "midpoint_distance_m": 239.0,
   "start_elevation_m": 38.774413049093106,
   "end_elevation_m": 41.087406863148324,
   "start_xy": [
    366725.7623457113,
    6272712.9207031345
   ],
   "end_xy": [
    366754.1272007538,
    6272671.764529562
   ]
  },
  "min_100m": {
   "gradient_pct": 8.909427790097702,
   "start_distance_m": 164.0,
   "end_distance_m": 264.0,
   "midpoint_distance_m": 214.0,
   "start_elevation_m": 32.17797907305062,
   "end_elevation_m": 41.087406863148324,
   "start_xy": [
    366736.6709137469,
    6272752.223884781
   ],
   "end_xy": [
    366754.1272007538,
    6272671.764529562
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 22.56808889788058,
   "start_distance_m": 46.0,
   "end_distance_m": 48.0,
   "midpoint_distance_m": 47.0,
   "start_elevation_m": 12.420204016982785,
   "end_elevation_m": 12.871565794940397,
   "start_xy": [
    366808.6408738058,
    6272827.234187289
   ],
   "end_xy": [
    366806.6466494706,
    6272827.386073104
   ]
  },
  "max_3m": {
   "gradient_pct": 22.396583036950272,
   "start_distance_m": 46.0,
   "end_distance_m": 49.0,
   "midpoint_distance_m": 47.5,
   "start_elevation_m": 12.420204016982785,
   "end_elevation_m": 13.092101508091293,
   "start_xy": [
    366808.6408738058,
    6272827.234187289
   ],
   "end_xy": [
    366805.649537303,
    6272827.462016012
   ]
  }
 },
 "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": 0.398,
   "obstruction_max_height_m": 23.19,
   "flagged_windows_m": [
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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-pyr1",
   "road_pbf": "block-batch-fr-pyr1.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:c54ac68b3f57b41b"
  },
  "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_E366-N6272_0m5@21LHD1EQ-2025-09-26.tif"
  ],
  "calculated_at": "2026-09-20T06:18:16+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr1.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pyr1",
  "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": [
   "E366-N6272"
  ],
  "elevation_blocks": [
   "21LHD1EQ@2025-09-26"
  ],
  "ign_dalles": [
   "LHD_FXX_0366_6273_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD1EQ"
  ],
  "ign_editions": [
   "2025-09-26"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0366_6273_MNT_O_0M50_LAMB93_IGN69": "2025-09-26"
  },
  "climb_origin": "discovered",
  "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked",
  "carriageway": {
   "stations": 17,
   "stations_resolved": 17,
   "width_median_m": 5.75,
   "width_p10_m": 4.4,
   "width_min_m": 3.75,
   "width_max_m": 12.0,
   "bounded_share": 0.0,
   "unbounded_share": 1.0,
   "confidence_median": 0.0,
   "window_m": [
    42.0,
    67.0
   ],
   "width_at_max25_m": 5.75,
   "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": 17,
    "stations_resolved": 17,
    "width_median_m": 6.75,
    "width_p10_m": 1.05,
    "width_min_m": 0.5,
    "width_max_m": 9.25,
    "bounded_share": 0.824,
    "unbounded_share": 0.176,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.12,
    "window_m": [
     42.0,
     67.0
    ],
    "width_at_max25_m": 7.5,
    "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": "Bidache",
  "county": "Pyr\u00e9n\u00e9es-Atlantiques",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}