{
 "ocl_version": "0.1.0",
 "name": "Chemin du Pont",
 "slug": "chemin-du-pont",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 17.806185890231063,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 2336.0,
   "end_distance_m": 2338.0,
   "start_elevation_m": 782.5791008425733,
   "end_elevation_m": 782.935224560378,
   "min_gradient_pct": -11.97280249446635,
   "suppressed_max_gradient_pct": 223.2657092966008,
   "suppressed_location_m": [
    603.0,
    605.0
   ],
   "suppressed_min_gradient_pct": -218.47032956702606,
   "suppressed_min_location_m": [
    601.0,
    603.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 17.700790155508155,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 2332.0,
   "end_distance_m": 2335.0,
   "start_elevation_m": 781.8735291746791,
   "end_elevation_m": 782.4045528793444,
   "min_gradient_pct": -11.811700420268304,
   "suppressed_max_gradient_pct": 148.97648811664035,
   "suppressed_location_m": [
    603.0,
    606.0
   ],
   "suppressed_min_gradient_pct": -145.13816072217574,
   "suppressed_min_location_m": [
    600.0,
    603.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 17.70469898349802,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 2333.0,
   "end_distance_m": 2338.0,
   "start_elevation_m": 782.049989611203,
   "end_elevation_m": 782.935224560378,
   "min_gradient_pct": -11.219819093055321,
   "suppressed_max_gradient_pct": 89.78486602947441,
   "suppressed_location_m": [
    603.0,
    608.0
   ],
   "suppressed_min_gradient_pct": -86.39342456708164,
   "suppressed_min_location_m": [
    598.0,
    603.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 17.443741426775432,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 2331.0,
   "end_distance_m": 2341.0,
   "start_elevation_m": 781.7052136372199,
   "end_elevation_m": 783.4495877798975,
   "min_gradient_pct": -10.856954751081958,
   "suppressed_max_gradient_pct": 45.73375137390826,
   "suppressed_location_m": [
    603.0,
    613.0
   ],
   "suppressed_min_gradient_pct": -42.663267764442026,
   "suppressed_min_location_m": [
    593.0,
    603.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 16.40689268011556,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 2331.0,
   "end_distance_m": 2351.0,
   "start_elevation_m": 781.7052136372199,
   "end_elevation_m": 784.986592173243,
   "min_gradient_pct": -10.361363365366287,
   "suppressed_max_gradient_pct": 24.159184055986316,
   "suppressed_location_m": [
    603.0,
    623.0
   ],
   "suppressed_min_gradient_pct": -20.896180852828934,
   "suppressed_min_location_m": [
    583.0,
    603.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 16.277290448134863,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 2331.0,
   "end_distance_m": 2356.0,
   "start_elevation_m": 781.7052136372199,
   "end_elevation_m": 785.7745362492536,
   "min_gradient_pct": -10.076507927682087,
   "suppressed_max_gradient_pct": 19.880066603799605,
   "suppressed_location_m": [
    603.0,
    628.0
   ],
   "suppressed_min_gradient_pct": -16.63176652925904,
   "suppressed_min_location_m": [
    578.0,
    603.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 15.243676645287678,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2322.0,
   "end_distance_m": 2372.0,
   "start_elevation_m": 780.4123673788037,
   "end_elevation_m": 788.0342057014475,
   "min_gradient_pct": -8.67715564623154
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.139288697831375,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2060.0,
   "end_distance_m": 2160.0,
   "start_elevation_m": 748.6432980056809,
   "end_elevation_m": 762.7825867035123,
   "min_gradient_pct": -5.8766294119507165
  }
 ],
 "shape": {
  "ascent_concentration": 0.482,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 246.0,
  "shape_class": "stepped"
 },
 "length_m": 2424.270738571335,
 "start_elevation_m": 675.8428607736628,
 "end_elevation_m": 792.9373536804216,
 "endpoint_gain_m": 117.09449290675877,
 "overall_gradient_pct": 4.830091418574997,
 "accumulated_ascent_m": 131.82043899067185,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 17.70469898349802,
   "start_distance_m": 2333.0,
   "end_distance_m": 2338.0,
   "midpoint_distance_m": 2335.5,
   "start_elevation_m": 782.049989611203,
   "end_elevation_m": 782.935224560378,
   "start_xy": [
    815913.009159052,
    6494799.541656424
   ],
   "end_xy": [
    815914.1060439494,
    6494804.419857274
   ]
  },
  "max_10m": {
   "gradient_pct": 17.443741426775432,
   "start_distance_m": 2331.0,
   "end_distance_m": 2341.0,
   "midpoint_distance_m": 2336.0,
   "start_elevation_m": 781.7052136372199,
   "end_elevation_m": 783.4495877798975,
   "start_xy": [
    815912.570405093,
    6494797.590376085
   ],
   "end_xy": [
    815914.7637891485,
    6494807.346768813
   ]
  },
  "max_20m": {
   "gradient_pct": 16.40689268011556,
   "start_distance_m": 2331.0,
   "end_distance_m": 2351.0,
   "midpoint_distance_m": 2341.0,
   "start_elevation_m": 781.7052136372199,
   "end_elevation_m": 784.986592173243,
   "start_xy": [
    815912.570405093,
    6494797.590376085
   ],
   "end_xy": [
    815912.1188976195,
    6494816.990655416
   ]
  },
  "max_25m": {
   "gradient_pct": 16.277290448134863,
   "start_distance_m": 2331.0,
   "end_distance_m": 2356.0,
   "midpoint_distance_m": 2343.5,
   "start_elevation_m": 781.7052136372199,
   "end_elevation_m": 785.7745362492536,
   "start_xy": [
    815912.570405093,
    6494797.590376085
   ],
   "end_xy": [
    815910.796451855,
    6494821.8125987165
   ]
  },
  "max_50m": {
   "gradient_pct": 15.243676645287678,
   "start_distance_m": 2322.0,
   "end_distance_m": 2372.0,
   "midpoint_distance_m": 2347.0,
   "start_elevation_m": 780.4123673788037,
   "end_elevation_m": 788.0342057014475,
   "start_xy": [
    815909.587242616,
    6494789.218404816
   ],
   "end_xy": [
    815906.5646254085,
    6494837.24281728
   ]
  },
  "max_100m": {
   "gradient_pct": 14.139288697831375,
   "start_distance_m": 2060.0,
   "end_distance_m": 2160.0,
   "midpoint_distance_m": 2110.0,
   "start_elevation_m": 748.6432980056809,
   "end_elevation_m": 762.7825867035123,
   "start_xy": [
    815967.8371292198,
    6494545.399848744
   ],
   "end_xy": [
    815926.0563699674,
    6494634.747601422
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -11.219819093055321,
   "start_distance_m": 1627.0,
   "end_distance_m": 1632.0,
   "midpoint_distance_m": 1629.5,
   "start_elevation_m": 739.4444276315696,
   "end_elevation_m": 738.8834366769169,
   "start_xy": [
    816014.404871506,
    6494138.180592364
   ],
   "end_xy": [
    816015.0626411554,
    6494143.137137439
   ]
  },
  "min_10m": {
   "gradient_pct": -10.856954751081958,
   "start_distance_m": 1628.0,
   "end_distance_m": 1638.0,
   "midpoint_distance_m": 1633.0,
   "start_elevation_m": 739.3517655480525,
   "end_elevation_m": 738.2660700729443,
   "start_xy": [
    816014.5364254359,
    6494139.171901379
   ],
   "end_xy": [
    816015.8519647347,
    6494149.0849915305
   ]
  },
  "min_20m": {
   "gradient_pct": -10.361363365366287,
   "start_distance_m": 1628.0,
   "end_distance_m": 1648.0,
   "midpoint_distance_m": 1638.0,
   "start_elevation_m": 739.3517655480525,
   "end_elevation_m": 737.2794928749793,
   "start_xy": [
    816014.5364254359,
    6494139.171901379
   ],
   "end_xy": [
    816017.1675040334,
    6494158.998081682
   ]
  },
  "min_25m": {
   "gradient_pct": -10.076507927682087,
   "start_distance_m": 1627.0,
   "end_distance_m": 1652.0,
   "midpoint_distance_m": 1639.5,
   "start_elevation_m": 739.4444276315696,
   "end_elevation_m": 736.9253006496491,
   "start_xy": [
    816014.404871506,
    6494138.180592364
   ],
   "end_xy": [
    816017.6937197528,
    6494162.963317743
   ]
  },
  "min_50m": {
   "gradient_pct": -8.67715564623154,
   "start_distance_m": 1624.0,
   "end_distance_m": 1674.0,
   "midpoint_distance_m": 1649.0,
   "start_elevation_m": 739.6667309513274,
   "end_elevation_m": 735.3281531282116,
   "start_xy": [
    816014.0102097165,
    6494135.206665318
   ],
   "end_xy": [
    816023.600544355,
    6494184.053631937
   ]
  },
  "min_100m": {
   "gradient_pct": -5.8766294119507165,
   "start_distance_m": 1623.0,
   "end_distance_m": 1723.0,
   "midpoint_distance_m": 1673.0,
   "start_elevation_m": 739.6930373038579,
   "end_elevation_m": 733.8164078919071,
   "start_xy": [
    816013.8786557866,
    6494134.215356303
   ],
   "end_xy": [
    816037.8863465362,
    6494230.335246239
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 17.806185890231063,
   "start_distance_m": 2336.0,
   "end_distance_m": 2338.0,
   "midpoint_distance_m": 2337.0,
   "start_elevation_m": 782.5791008425733,
   "end_elevation_m": 782.935224560378,
   "start_xy": [
    815913.6672899905,
    6494802.468576934
   ],
   "end_xy": [
    815914.1060439494,
    6494804.419857274
   ]
  },
  "max_3m": {
   "gradient_pct": 17.700790155508155,
   "start_distance_m": 2332.0,
   "end_distance_m": 2335.0,
   "midpoint_distance_m": 2333.5,
   "start_elevation_m": 781.8735291746791,
   "end_elevation_m": 782.4045528793444,
   "start_xy": [
    815912.7897820725,
    6494798.566016255
   ],
   "end_xy": [
    815913.447913011,
    6494801.492936764
   ]
  }
 },
 "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": 0.006,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0
   ],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.007,
   "obstruction_max_height_m": 16.1,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    597.0,
    610.0
   ]
  ],
  "review": [],
  "extent": [
   "may_continue_beyond_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-mc8",
   "road_pbf": "block-batch-fr-mc8.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_E815-N6493_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E815-N6494_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E816-N6493_0m5@22LHD4NL-2025-08-06.tif",
   "data/cache/fr/ign-lidarhd_dtm_E816-N6494_0m5@22LHD4NL-2025-08-06.tif"
  ],
  "calculated_at": "2026-09-22T15:35:14+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc8.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc8",
  "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": [
   "E815-N6493",
   "E815-N6494",
   "E816-N6493",
   "E816-N6494"
  ],
  "elevation_blocks": [
   "22LHD4NL@2025-08-06"
  ],
  "ign_dalles": [
   "LHD_FXX_0815_6494_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0815_6495_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0816_6494_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0816_6495_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD4NL"
  ],
  "ign_editions": [
   "2025-08-06"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0815_6494_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0815_6495_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0816_6494_MNT_O_0M50_LAMB93_IGN69": "2025-08-06",
   "LHD_FXX_0816_6495_MNT_O_0M50_LAMB93_IGN69": "2025-08-06"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 103,
   "stations_resolved": 103,
   "width_median_m": 8.25,
   "width_p10_m": 5.55,
   "width_min_m": 3.25,
   "width_max_m": 12.0,
   "bounded_share": 0.262,
   "unbounded_share": 0.738,
   "confidence_median": 0.0,
   "width_median_bounded_m": 7.0,
   "window_m": [
    2331.0,
    2356.0
   ],
   "width_at_max25_m": 8.5,
   "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": 103,
    "stations_resolved": 103,
    "width_median_m": 10.75,
    "width_p10_m": 6.55,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.398,
    "unbounded_share": 0.602,
    "confidence_median": 0.0,
    "width_median_bounded_m": 8.5,
    "window_m": [
     2331.0,
     2356.0
    ],
    "width_at_max25_m": 10.25,
    "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": "Saint-Christo-en-Jarez",
  "county": "Loire",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}