{
 "ocl_version": "0.1.0",
 "name": "Col de Belle Roche from Les Neyrolles",
 "slug": "col-de-belle-roche-from-les-neyrolles",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 21.431720910356944,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 733.0,
   "end_distance_m": 735.0,
   "start_elevation_m": 1012.0272057985617,
   "end_elevation_m": 1012.4558402167688,
   "min_gradient_pct": -14.632700791008801
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 20.236548007274752,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 732.0,
   "end_distance_m": 735.0,
   "start_elevation_m": 1011.8487437765506,
   "end_elevation_m": 1012.4558402167688,
   "min_gradient_pct": -8.072797711152665
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 13.778733348606238,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 745.0,
   "end_distance_m": 750.0,
   "start_elevation_m": 1012.5159774169235,
   "end_elevation_m": 1013.2049140843538,
   "min_gradient_pct": -5.112581335436062
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 9.453901557241124,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 740.0,
   "end_distance_m": 750.0,
   "start_elevation_m": 1012.2595239286297,
   "end_elevation_m": 1013.2049140843538,
   "min_gradient_pct": -2.1091843790668463
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 6.9908138149537535,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 730.0,
   "end_distance_m": 750.0,
   "start_elevation_m": 1011.8067513213631,
   "end_elevation_m": 1013.2049140843538,
   "min_gradient_pct": -1.6906922731800478
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 5.716579143061608,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 700.0,
   "end_distance_m": 725.0,
   "start_elevation_m": 1010.5900641123334,
   "end_elevation_m": 1012.0192088980988,
   "min_gradient_pct": -1.4762458264758607
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 5.229699944040931,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 700.0,
   "end_distance_m": 750.0,
   "start_elevation_m": 1010.5900641123334,
   "end_elevation_m": 1013.2049140843538,
   "min_gradient_pct": -0.5875395174912228
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 4.676794545486928,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 650.0,
   "end_distance_m": 750.0,
   "start_elevation_m": 1008.5281195388669,
   "end_elevation_m": 1013.2049140843538,
   "min_gradient_pct": 0.29376913053033604
  }
 ],
 "shape": {
  "ascent_concentration": 0.316,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 0.0,
  "shape_class": "sustained"
 },
 "length_m": 2173.2675509844134,
 "start_elevation_m": 981.758128063967,
 "end_elevation_m": 1057.4067230654346,
 "endpoint_gain_m": 75.64859500146758,
 "overall_gradient_pct": 3.480868932460775,
 "accumulated_ascent_m": 78.3392132026429,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 13.778733348606238,
   "start_distance_m": 745.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 747.5,
   "start_elevation_m": 1012.5159774169235,
   "end_elevation_m": 1013.2049140843538,
   "start_xy": [
    903814.3389465591,
    6561381.9445224535
   ],
   "end_xy": [
    903816.9159046647,
    6561377.659748605
   ]
  },
  "max_10m": {
   "gradient_pct": 9.453901557241124,
   "start_distance_m": 740.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 745.0,
   "start_elevation_m": 1012.2595239286297,
   "end_elevation_m": 1013.2049140843538,
   "start_xy": [
    903811.7619884537,
    6561386.229296301
   ],
   "end_xy": [
    903816.9159046647,
    6561377.659748605
   ]
  },
  "max_20m": {
   "gradient_pct": 6.9908138149537535,
   "start_distance_m": 730.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 740.0,
   "start_elevation_m": 1011.8067513213631,
   "end_elevation_m": 1013.2049140843538,
   "start_xy": [
    903806.6080722427,
    6561394.798843995
   ],
   "end_xy": [
    903816.9159046647,
    6561377.659748605
   ]
  },
  "max_25m": {
   "gradient_pct": 5.716579143061608,
   "start_distance_m": 700.0,
   "end_distance_m": 725.0,
   "midpoint_distance_m": 712.5,
   "start_elevation_m": 1010.5900641123334,
   "end_elevation_m": 1012.0192088980988,
   "start_xy": [
    903791.5949963751,
    6561420.771379332
   ],
   "end_xy": [
    903804.0576480778,
    6561399.099224097
   ]
  },
  "max_50m": {
   "gradient_pct": 5.229699944040931,
   "start_distance_m": 700.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 725.0,
   "start_elevation_m": 1010.5900641123334,
   "end_elevation_m": 1013.2049140843538,
   "start_xy": [
    903791.5949963751,
    6561420.771379332
   ],
   "end_xy": [
    903816.9159046647,
    6561377.659748605
   ]
  },
  "max_100m": {
   "gradient_pct": 4.676794545486928,
   "start_distance_m": 650.0,
   "end_distance_m": 750.0,
   "midpoint_distance_m": 700.0,
   "start_elevation_m": 1008.5281195388669,
   "end_elevation_m": 1013.2049140843538,
   "start_xy": [
    903769.0535588439,
    6561465.255483261
   ],
   "end_xy": [
    903816.9159046647,
    6561377.659748605
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -5.112581335436062,
   "start_distance_m": 750.0,
   "end_distance_m": 755.0,
   "midpoint_distance_m": 752.5,
   "start_elevation_m": 1013.2049140843538,
   "end_elevation_m": 1012.949285017582,
   "start_xy": [
    903816.9159046647,
    6561377.659748605
   ],
   "end_xy": [
    903819.4928627701,
    6561373.374974758
   ]
  },
  "min_10m": {
   "gradient_pct": -2.1091843790668463,
   "start_distance_m": 2042.0,
   "end_distance_m": 2052.0,
   "midpoint_distance_m": 2047.0,
   "start_elevation_m": 1056.6097922482913,
   "end_elevation_m": 1056.3988738103847,
   "start_xy": [
    904305.3242028408,
    6560297.451002945
   ],
   "end_xy": [
    904315.3185746354,
    6560297.786461485
   ]
  },
  "min_20m": {
   "gradient_pct": -1.6906922731800478,
   "start_distance_m": 2037.0,
   "end_distance_m": 2057.0,
   "midpoint_distance_m": 2047.0,
   "start_elevation_m": 1056.6844794678977,
   "end_elevation_m": 1056.3463410132617,
   "start_xy": [
    904300.3270169435,
    6560297.283273675
   ],
   "end_xy": [
    904320.2751346823,
    6560297.232579951
   ]
  },
  "min_25m": {
   "gradient_pct": -1.4762458264758607,
   "start_distance_m": 2032.0,
   "end_distance_m": 2057.0,
   "midpoint_distance_m": 2044.5,
   "start_elevation_m": 1056.7154024698807,
   "end_elevation_m": 1056.3463410132617,
   "start_xy": [
    904295.405927799,
    6560298.090383962
   ],
   "end_xy": [
    904320.2751346823,
    6560297.232579951
   ]
  },
  "min_50m": {
   "gradient_pct": -0.5875395174912228,
   "start_distance_m": 2011.0,
   "end_distance_m": 2061.0,
   "midpoint_distance_m": 2036.0,
   "start_elevation_m": 1056.6485132503003,
   "end_elevation_m": 1056.3547434915547,
   "start_xy": [
    904275.8337298514,
    6560305.440753579
   ],
   "end_xy": [
    904324.2325602628,
    6560296.65052946
   ]
  },
  "min_100m": {
   "gradient_pct": 0.29376913053033604,
   "start_distance_m": 2005.0,
   "end_distance_m": 2105.0,
   "midpoint_distance_m": 2055.0,
   "start_elevation_m": 1056.6106349213876,
   "end_elevation_m": 1056.904404051918,
   "start_xy": [
    904270.3343963285,
    6560307.840197432
   ],
   "end_xy": [
    904357.1116908276,
    6560269.235731028
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 21.431720910356944,
   "start_distance_m": 733.0,
   "end_distance_m": 735.0,
   "midpoint_distance_m": 734.0,
   "start_elevation_m": 1012.0272057985617,
   "end_elevation_m": 1012.4558402167688,
   "start_xy": [
    903808.1542471059,
    6561392.227979686
   ],
   "end_xy": [
    903809.1850303481,
    6561390.514070148
   ]
  },
  "max_3m": {
   "gradient_pct": 20.236548007274752,
   "start_distance_m": 732.0,
   "end_distance_m": 735.0,
   "midpoint_distance_m": 733.5,
   "start_elevation_m": 1011.8487437765506,
   "end_elevation_m": 1012.4558402167688,
   "start_xy": [
    903807.6388554849,
    6561393.084934456
   ],
   "end_xy": [
    903809.1850303481,
    6561390.514070148
   ]
  }
 },
 "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": 0.331,
   "obstruction_max_height_m": 29.78,
   "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": "c4fd6b4a89a9718922c7ed8acdf14e43dcf75a33",
   "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-ju2",
   "road_pbf": "block-batch-fr-ju2.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": "sha256:78945c7930496bfe"
  },
  "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_E903-N6560_0m5@21LHD5PK1-2024-12-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E903-N6561_0m5@21LHD5PK1-2024-12-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E903-N6562_0m5@21LHD5PK1-2024-12-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E904-N6560_0m5@21LHD5PK1-2024-12-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E904-N6561_0m5@21LHD5PK1-2024-12-19.tif"
  ],
  "calculated_at": "2026-09-24T10:57:25+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-ju2.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-ju2",
  "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": [
   "E903-N6560",
   "E903-N6561",
   "E903-N6562",
   "E904-N6560",
   "E904-N6561"
  ],
  "elevation_blocks": [
   "21LHD5PK1@2024-12-19"
  ],
  "ign_dalles": [
   "LHD_FXX_0903_6561_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0903_6562_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0903_6563_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0904_6561_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0904_6562_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD5PK1"
  ],
  "ign_editions": [
   "2024-12-19"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0903_6561_MNT_O_0M50_LAMB93_IGN69": "2024-12-19",
   "LHD_FXX_0903_6562_MNT_O_0M50_LAMB93_IGN69": "2024-12-19",
   "LHD_FXX_0903_6563_MNT_O_0M50_LAMB93_IGN69": "2024-12-19",
   "LHD_FXX_0904_6561_MNT_O_0M50_LAMB93_IGN69": "2024-12-19",
   "LHD_FXX_0904_6562_MNT_O_0M50_LAMB93_IGN69": "2024-12-19"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 91,
   "stations_resolved": 91,
   "width_median_m": 4.75,
   "width_p10_m": 4.0,
   "width_min_m": 1.25,
   "width_max_m": 8.75,
   "bounded_share": 0.67,
   "unbounded_share": 0.33,
   "confidence_median": 0.662,
   "width_median_bounded_m": 5.0,
   "window_m": [
    700.0,
    725.0
   ],
   "width_at_max25_m": 5.0,
   "window_stations": 6,
   "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": 91,
    "stations_resolved": 91,
    "width_median_m": 3.25,
    "width_p10_m": 0.5,
    "width_min_m": 0.5,
    "width_max_m": 10.0,
    "bounded_share": 0.934,
    "unbounded_share": 0.066,
    "confidence_median": 1.0,
    "width_median_bounded_m": 3.0,
    "window_m": [
     700.0,
     725.0
    ],
    "width_at_max25_m": 2.62,
    "window_stations": 6,
    "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": "Les Neyrolles",
  "county": "Ain",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}