{
 "ocl_version": "0.1.0",
 "name": "Chemin de l'Aspic",
 "slug": "chemin-de-l-aspic",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 24.895430255799056,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 244.0,
   "end_distance_m": 246.0,
   "start_elevation_m": 108.29912724155663,
   "end_elevation_m": 108.79703584667261,
   "min_gradient_pct": -7.64884146768452
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.39856779791872,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 245.0,
   "end_distance_m": 248.0,
   "start_elevation_m": 108.54886478579093,
   "end_elevation_m": 109.28082181972849,
   "min_gradient_pct": -6.988165356684324
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.466974855703256,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 244.0,
   "end_distance_m": 249.0,
   "start_elevation_m": 108.29912724155663,
   "end_elevation_m": 109.5224759843418,
   "min_gradient_pct": -6.192318161571961
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.910716067996276,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 242.0,
   "end_distance_m": 252.0,
   "start_elevation_m": 107.83137247736241,
   "end_elevation_m": 110.22244408416203,
   "min_gradient_pct": -5.404255115121259
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.67294113841139,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 239.0,
   "end_distance_m": 259.0,
   "start_elevation_m": 107.19082070130335,
   "end_elevation_m": 111.72540892898563,
   "min_gradient_pct": -5.047938042390712
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.12264460289811,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 238.0,
   "end_distance_m": 263.0,
   "start_elevation_m": 106.97598738121692,
   "end_elevation_m": 112.50664853194145,
   "min_gradient_pct": -4.690500506889748
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.431796237716725,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 287.0,
   "end_distance_m": 337.0,
   "start_elevation_m": 116.59672589195817,
   "end_elevation_m": 126.81262401081653,
   "min_gradient_pct": -3.665493624453802
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.01874052323255,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 237.0,
   "end_distance_m": 337.0,
   "start_elevation_m": 106.79388348758398,
   "end_elevation_m": 126.81262401081653,
   "min_gradient_pct": -2.970268271346015
  }
 ],
 "shape": {
  "ascent_concentration": 0.559,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 162.0,
  "shape_class": "stepped"
 },
 "length_m": 525.6602728927883,
 "start_elevation_m": 91.39602676391166,
 "end_elevation_m": 132.826984587447,
 "endpoint_gain_m": 41.43095782353532,
 "overall_gradient_pct": 7.881698496166444,
 "accumulated_ascent_m": 44.593078408118544,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.466974855703256,
   "start_distance_m": 244.0,
   "end_distance_m": 249.0,
   "midpoint_distance_m": 246.5,
   "start_elevation_m": 108.29912724155663,
   "end_elevation_m": 109.5224759843418,
   "start_xy": [
    802048.3201670743,
    6303068.445454649
   ],
   "end_xy": [
    802053.1826528297,
    6303069.610028511
   ]
  },
  "max_10m": {
   "gradient_pct": 23.910716067996276,
   "start_distance_m": 242.0,
   "end_distance_m": 252.0,
   "midpoint_distance_m": 247.0,
   "start_elevation_m": 107.83137247736241,
   "end_elevation_m": 110.22244408416203,
   "start_xy": [
    802046.3751727722,
    6303067.979625104
   ],
   "end_xy": [
    802056.1001442829,
    6303070.3087728275
   ]
  },
  "max_20m": {
   "gradient_pct": 22.67294113841139,
   "start_distance_m": 239.0,
   "end_distance_m": 259.0,
   "midpoint_distance_m": 249.0,
   "start_elevation_m": 107.19082070130335,
   "end_elevation_m": 111.72540892898563,
   "start_xy": [
    802043.457681319,
    6303067.280880787
   ],
   "end_xy": [
    802062.9076243404,
    6303071.9391762335
   ]
  },
  "max_25m": {
   "gradient_pct": 22.12264460289811,
   "start_distance_m": 238.0,
   "end_distance_m": 263.0,
   "midpoint_distance_m": 250.5,
   "start_elevation_m": 106.97598738121692,
   "end_elevation_m": 112.50664853194145,
   "start_xy": [
    802042.4851841679,
    6303067.0479660155
   ],
   "end_xy": [
    802066.8024483527,
    6303072.850377347
   ]
  },
  "max_50m": {
   "gradient_pct": 20.431796237716725,
   "start_distance_m": 287.0,
   "end_distance_m": 337.0,
   "midpoint_distance_m": 312.0,
   "start_elevation_m": 116.59672589195817,
   "end_elevation_m": 126.81262401081653,
   "start_xy": [
    802090.1752294559,
    6303078.301350058
   ],
   "end_xy": [
    802139.1904515347,
    6303088.057722265
   ]
  },
  "max_100m": {
   "gradient_pct": 20.01874052323255,
   "start_distance_m": 237.0,
   "end_distance_m": 337.0,
   "midpoint_distance_m": 287.0,
   "start_elevation_m": 106.79388348758398,
   "end_elevation_m": 126.81262401081653,
   "start_xy": [
    802041.5126870169,
    6303066.815051243
   ],
   "end_xy": [
    802139.1904515347,
    6303088.057722265
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -6.192318161571961,
   "start_distance_m": 509.0,
   "end_distance_m": 514.0,
   "midpoint_distance_m": 511.5,
   "start_elevation_m": 133.3422577684097,
   "end_elevation_m": 133.0326418603311,
   "start_xy": [
    802295.8320566682,
    6303115.772037357
   ],
   "end_xy": [
    802299.4771705503,
    6303119.1944845505
   ]
  },
  "min_10m": {
   "gradient_pct": -5.404255115121259,
   "start_distance_m": 507.0,
   "end_distance_m": 517.0,
   "midpoint_distance_m": 512.0,
   "start_elevation_m": 133.4293104522478,
   "end_elevation_m": 132.88888494073566,
   "start_xy": [
    802294.4879269776,
    6303114.291252311
   ],
   "end_xy": [
    802301.6642388795,
    6303121.247952866
   ]
  },
  "min_20m": {
   "gradient_pct": -5.047938042390712,
   "start_distance_m": 497.0,
   "end_distance_m": 517.0,
   "midpoint_distance_m": 507.0,
   "start_elevation_m": 133.8984725492138,
   "end_elevation_m": 132.88888494073566,
   "start_xy": [
    802287.4799606119,
    6303107.308481081
   ],
   "end_xy": [
    802301.6642388795,
    6303121.247952866
   ]
  },
  "min_25m": {
   "gradient_pct": -4.690500506889748,
   "start_distance_m": 492.0,
   "end_distance_m": 517.0,
   "midpoint_distance_m": 504.5,
   "start_elevation_m": 134.0615100674581,
   "end_elevation_m": 132.88888494073566,
   "start_xy": [
    802282.8282584761,
    6303105.4749960825
   ],
   "end_xy": [
    802301.6642388795,
    6303121.247952866
   ]
  },
  "min_50m": {
   "gradient_pct": -3.665493624453802,
   "start_distance_m": 466.0,
   "end_distance_m": 516.0,
   "midpoint_distance_m": 491.0,
   "start_elevation_m": 134.76801226755765,
   "end_elevation_m": 132.93526545533075,
   "start_xy": [
    802258.6394073697,
    6303095.940874091
   ],
   "end_xy": [
    802300.935216103,
    6303120.563463427
   ]
  },
  "min_100m": {
   "gradient_pct": -2.970268271346015,
   "start_distance_m": 425.0,
   "end_distance_m": 525.0,
   "midpoint_distance_m": 475.0,
   "start_elevation_m": 135.79634486946202,
   "end_elevation_m": 132.826076598116,
   "start_xy": [
    802220.8281304998,
    6303080.1139670005
   ],
   "end_xy": [
    802309.0998124761,
    6303124.146042076
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 24.895430255799056,
   "start_distance_m": 244.0,
   "end_distance_m": 246.0,
   "midpoint_distance_m": 245.0,
   "start_elevation_m": 108.29912724155663,
   "end_elevation_m": 108.79703584667261,
   "start_xy": [
    802048.3201670743,
    6303068.445454649
   ],
   "end_xy": [
    802050.2651613764,
    6303068.911284193
   ]
  },
  "max_3m": {
   "gradient_pct": 24.39856779791872,
   "start_distance_m": 245.0,
   "end_distance_m": 248.0,
   "midpoint_distance_m": 246.5,
   "start_elevation_m": 108.54886478579093,
   "end_elevation_m": 109.28082181972849,
   "start_xy": [
    802049.2926642254,
    6303068.6783694215
   ],
   "end_xy": [
    802052.2101556787,
    6303069.377113738
   ]
  }
 },
 "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": 0.199,
   "obstruction_max_height_m": 16.9,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "descends_at_end"
  ]
 },
 "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_E801-N6303_0m5@21LHD7NP-2024-12-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E802-N6303_0m5@21LHD7NP-2024-12-19.tif"
  ],
  "calculated_at": "2026-09-22T14:31:16+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": [
   "E801-N6303",
   "E802-N6303"
  ],
  "elevation_blocks": [
   "21LHD7NP@2024-12-19"
  ],
  "ign_dalles": [
   "LHD_FXX_0801_6304_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0802_6304_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD7NP"
  ],
  "ign_editions": [
   "2024-12-19"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0801_6304_MNT_O_0M50_LAMB93_IGN69": "2024-12-19",
   "LHD_FXX_0802_6304_MNT_O_0M50_LAMB93_IGN69": "2024-12-19"
  },
  "climb_origin": "discovered",
  "structure_own_ways": 2,
  "carriageway": {
   "stations": 28,
   "stations_resolved": 28,
   "width_median_m": 7.12,
   "width_p10_m": 4.42,
   "width_min_m": 3.75,
   "width_max_m": 12.0,
   "bounded_share": 0.107,
   "unbounded_share": 0.893,
   "confidence_median": 0.0,
   "width_median_bounded_m": 5.75,
   "window_m": [
    238.0,
    263.0
   ],
   "width_at_max25_m": 5.0,
   "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": 28,
    "stations_resolved": 28,
    "width_median_m": 4.38,
    "width_p10_m": 1.18,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.714,
    "unbounded_share": 0.286,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.25,
    "window_m": [
     238.0,
     263.0
    ],
    "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": "Caveirac",
  "county": "Gard",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}