{
 "ocl_version": "0.1.0",
 "name": "Chemin de Sequi",
 "slug": "chemin-de-sequi",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 34.12257251220865,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 413.0,
   "end_distance_m": 415.0,
   "start_elevation_m": 234.76615706235276,
   "end_elevation_m": 235.44860851259693,
   "min_gradient_pct": -6.833677638587687
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.47084589538167,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 412.0,
   "end_distance_m": 415.0,
   "start_elevation_m": 234.50448313573548,
   "end_elevation_m": 235.44860851259693,
   "min_gradient_pct": -6.3402834213690085
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 29.448948727358584,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 410.0,
   "end_distance_m": 415.0,
   "start_elevation_m": 233.976161076229,
   "end_elevation_m": 235.44860851259693,
   "min_gradient_pct": -6.068688619614022
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.72955115944751,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 406.0,
   "end_distance_m": 416.0,
   "start_elevation_m": 233.12973962107856,
   "end_elevation_m": 235.7026947370233,
   "min_gradient_pct": -5.496421776093712
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.96658594006084,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 396.0,
   "end_distance_m": 416.0,
   "start_elevation_m": 230.90937754901114,
   "end_elevation_m": 235.7026947370233,
   "min_gradient_pct": -3.9502689338871733
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.535850319796964,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 391.0,
   "end_distance_m": 416.0,
   "start_elevation_m": 229.81873215707407,
   "end_elevation_m": 235.7026947370233,
   "min_gradient_pct": -3.280662429026961
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.09973973369898,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 366.0,
   "end_distance_m": 416.0,
   "start_elevation_m": 225.15282487017382,
   "end_elevation_m": 235.7026947370233,
   "min_gradient_pct": -1.4302836071379375
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.288158401997265,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 340.0,
   "end_distance_m": 440.0,
   "start_elevation_m": 221.0897569074536,
   "end_elevation_m": 239.37791530945086,
   "min_gradient_pct": 0.2863914696789891
  }
 ],
 "shape": {
  "ascent_concentration": 0.484,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 179.0,
  "shape_class": "stepped"
 },
 "length_m": 644.621330386165,
 "start_elevation_m": 199.93022311584576,
 "end_elevation_m": 252.05124848994842,
 "endpoint_gain_m": 52.12102537410266,
 "overall_gradient_pct": 8.085526016161952,
 "accumulated_ascent_m": 53.6705674262424,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 29.448948727358584,
   "start_distance_m": 410.0,
   "end_distance_m": 415.0,
   "midpoint_distance_m": 412.5,
   "start_elevation_m": 233.976161076229,
   "end_elevation_m": 235.44860851259693,
   "start_xy": [
    910525.8271766787,
    6257347.005121234
   ],
   "end_xy": [
    910520.9607293694,
    6257348.15302828
   ]
  },
  "max_10m": {
   "gradient_pct": 25.72955115944751,
   "start_distance_m": 406.0,
   "end_distance_m": 416.0,
   "midpoint_distance_m": 411.0,
   "start_elevation_m": 233.12973962107856,
   "end_elevation_m": 235.7026947370233,
   "start_xy": [
    910529.3479426504,
    6257345.112423727
   ],
   "end_xy": [
    910519.9874399075,
    6257348.38260969
   ]
  },
  "max_20m": {
   "gradient_pct": 23.96658594006084,
   "start_distance_m": 396.0,
   "end_distance_m": 416.0,
   "midpoint_distance_m": 406.0,
   "start_elevation_m": 230.90937754901114,
   "end_elevation_m": 235.7026947370233,
   "start_xy": [
    910538.1311168348,
    6257340.331644372
   ],
   "end_xy": [
    910519.9874399075,
    6257348.38260969
   ]
  },
  "max_25m": {
   "gradient_pct": 23.535850319796964,
   "start_distance_m": 391.0,
   "end_distance_m": 416.0,
   "midpoint_distance_m": 403.5,
   "start_elevation_m": 229.81873215707407,
   "end_elevation_m": 235.7026947370233,
   "start_xy": [
    910542.5235524675,
    6257337.942814659
   ],
   "end_xy": [
    910519.9874399075,
    6257348.38260969
   ]
  },
  "max_50m": {
   "gradient_pct": 21.09973973369898,
   "start_distance_m": 366.0,
   "end_distance_m": 416.0,
   "midpoint_distance_m": 391.0,
   "start_elevation_m": 225.15282487017382,
   "end_elevation_m": 235.7026947370233,
   "start_xy": [
    910554.697194717,
    6257316.413560906
   ],
   "end_xy": [
    910519.9874399075,
    6257348.38260969
   ]
  },
  "max_100m": {
   "gradient_pct": 18.288158401997265,
   "start_distance_m": 340.0,
   "end_distance_m": 440.0,
   "midpoint_distance_m": 390.0,
   "start_elevation_m": 221.0897569074536,
   "end_elevation_m": 239.37791530945086,
   "start_xy": [
    910574.0675919161,
    6257299.0703284405
   ],
   "end_xy": [
    910496.6276122568,
    6257353.88882743
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.068688619614022,
   "start_distance_m": 555.0,
   "end_distance_m": 560.0,
   "midpoint_distance_m": 557.5,
   "start_elevation_m": 250.63188302430214,
   "end_elevation_m": 250.32844859332144,
   "start_xy": [
    910392.3559656169,
    6257383.492068109
   ],
   "end_xy": [
    910387.4042847662,
    6257384.18535261
   ]
  },
  "min_10m": {
   "gradient_pct": -5.496421776093712,
   "start_distance_m": 551.0,
   "end_distance_m": 561.0,
   "midpoint_distance_m": 556.0,
   "start_elevation_m": 250.83373520143732,
   "end_elevation_m": 250.28409302382795,
   "start_xy": [
    910396.3143593397,
    6257382.916638587
   ],
   "end_xy": [
    910386.4137203913,
    6257384.3224008465
   ]
  },
  "min_20m": {
   "gradient_pct": -3.9502689338871733,
   "start_distance_m": 548.0,
   "end_distance_m": 568.0,
   "midpoint_distance_m": 558.0,
   "start_elevation_m": 250.91322743665643,
   "end_elevation_m": 250.123173649879,
   "start_xy": [
    910399.1587521068,
    6257382.1196533395
   ],
   "end_xy": [
    910379.4797697668,
    6257385.281738502
   ]
  },
  "min_25m": {
   "gradient_pct": -3.280662429026961,
   "start_distance_m": 547.0,
   "end_distance_m": 572.0,
   "midpoint_distance_m": 559.5,
   "start_elevation_m": 250.90584147360715,
   "end_elevation_m": 250.0856758663504,
   "start_xy": [
    910400.0305607488,
    6257381.629806739
   ],
   "end_xy": [
    910375.5175122671,
    6257385.829931448
   ]
  },
  "min_50m": {
   "gradient_pct": -1.4302836071379375,
   "start_distance_m": 543.0,
   "end_distance_m": 593.0,
   "midpoint_distance_m": 568.0,
   "start_elevation_m": 250.8501105490288,
   "end_elevation_m": 250.13496874545984,
   "start_xy": [
    910403.5177953163,
    6257379.6704203375
   ],
   "end_xy": [
    910354.7156603936,
    6257388.707944414
   ]
  },
  "min_100m": {
   "gradient_pct": 0.2863914696789891,
   "start_distance_m": 118.0,
   "end_distance_m": 218.0,
   "midpoint_distance_m": 168.0,
   "start_elevation_m": 213.25566116074592,
   "end_elevation_m": 213.5420526304249,
   "start_xy": [
    910775.0196467228,
    6257218.40740569
   ],
   "end_xy": [
    910683.1935273146,
    6257244.693749508
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 34.12257251220865,
   "start_distance_m": 413.0,
   "end_distance_m": 415.0,
   "midpoint_distance_m": 414.0,
   "start_elevation_m": 234.76615706235276,
   "end_elevation_m": 235.44860851259693,
   "start_xy": [
    910522.907308293,
    6257347.693865461
   ],
   "end_xy": [
    910520.9607293694,
    6257348.15302828
   ]
  },
  "max_3m": {
   "gradient_pct": 31.47084589538167,
   "start_distance_m": 412.0,
   "end_distance_m": 415.0,
   "midpoint_distance_m": 413.5,
   "start_elevation_m": 234.50448313573548,
   "end_elevation_m": 235.44860851259693,
   "start_xy": [
    910523.880597755,
    6257347.464284052
   ],
   "end_xy": [
    910520.9607293694,
    6257348.15302828
   ]
  }
 },
 "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": 0.153,
   "obstruction_max_height_m": 15.65,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "41205ec4649bb0a4093af76ff34281a5d9a13832",
   "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-pr4",
   "road_pbf": "block-batch-fr-pr4.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:ba95a0bf562c86eb"
  },
  "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_E910-N6257_0m5@21LHD7PQ-2025-03-14.tif"
  ],
  "calculated_at": "2026-09-25T09:29:04+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-pr4.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-pr4",
  "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": [
   "E910-N6257"
  ],
  "elevation_blocks": [
   "21LHD7PQ@2025-03-14"
  ],
  "ign_dalles": [
   "LHD_FXX_0910_6258_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD7PQ"
  ],
  "ign_editions": [
   "2025-03-14"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0910_6258_MNT_O_0M50_LAMB93_IGN69": "2025-03-14"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 1,
  "carriageway": {
   "stations": 32,
   "stations_resolved": 32,
   "width_median_m": 5.5,
   "width_p10_m": 3.05,
   "width_min_m": 1.25,
   "width_max_m": 12.0,
   "bounded_share": 0.312,
   "unbounded_share": 0.688,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.12,
   "window_m": [
    391.0,
    416.0
   ],
   "width_at_max25_m": 4.0,
   "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": 32,
    "stations_resolved": 32,
    "width_median_m": 4.25,
    "width_p10_m": 1.25,
    "width_min_m": 1.0,
    "width_max_m": 12.0,
    "bounded_share": 0.844,
    "unbounded_share": 0.156,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.75,
    "window_m": [
     391.0,
     416.0
    ],
    "width_at_max25_m": 6.25,
    "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": "La Destrousse",
  "county": "Bouches-du-Rh\u00f4ne",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}