{
 "ocl_version": "0.1.0",
 "name": "Col de Chemintrand",
 "slug": "route-de-viverols-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 8.27396446255193,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1128.0,
   "end_distance_m": 1130.0,
   "start_elevation_m": 993.4994113729991,
   "end_elevation_m": 993.6648906622502,
   "min_gradient_pct": 1.1297631761635785
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 7.226835889802412,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1121.0,
   "end_distance_m": 1124.0,
   "start_elevation_m": 993.1245966494761,
   "end_elevation_m": 993.3414017261701,
   "min_gradient_pct": 1.2900937517467053
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 6.326787940377017,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 675.0,
   "end_distance_m": 680.0,
   "start_elevation_m": 971.6240109309929,
   "end_elevation_m": 971.9403503280117,
   "min_gradient_pct": 1.6107838979496591
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 5.9837174345921085,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 627.0,
   "end_distance_m": 637.0,
   "start_elevation_m": 969.1640375979111,
   "end_elevation_m": 969.7624093413704,
   "min_gradient_pct": 2.170606527554355
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 5.605730635563191,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 621.0,
   "end_distance_m": 641.0,
   "start_elevation_m": 968.8365928791206,
   "end_elevation_m": 969.9577390062333,
   "min_gradient_pct": 2.756822890054309
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 5.563919022988557,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1109.0,
   "end_distance_m": 1134.0,
   "start_elevation_m": 992.4749008544243,
   "end_elevation_m": 993.8658806101714,
   "min_gradient_pct": 3.0431018171329924
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 5.299478657856753,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 594.0,
   "end_distance_m": 644.0,
   "start_elevation_m": 967.4718836170443,
   "end_elevation_m": 970.1216229459727,
   "min_gradient_pct": 3.623728816793573
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 5.13940570841271,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 587.0,
   "end_distance_m": 687.0,
   "start_elevation_m": 967.1250543110085,
   "end_elevation_m": 972.2644600194212,
   "min_gradient_pct": 4.16099700880477
  }
 ],
 "shape": {
  "ascent_concentration": 0.259,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 0.0,
  "shape_class": "sustained"
 },
 "length_m": 1902.7140039044677,
 "start_elevation_m": 939.0264200449194,
 "end_elevation_m": 1028.9417049853612,
 "endpoint_gain_m": 89.91528494044178,
 "overall_gradient_pct": 4.7256332142366615,
 "accumulated_ascent_m": 89.97099450142912,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 6.326787940377017,
   "start_distance_m": 675.0,
   "end_distance_m": 680.0,
   "midpoint_distance_m": 677.5,
   "start_elevation_m": 971.6240109309929,
   "end_elevation_m": 971.9403503280117,
   "start_xy": [
    765412.3381482221,
    6485678.703062705
   ],
   "end_xy": [
    765411.1095418747,
    6485673.8563600695
   ]
  },
  "max_10m": {
   "gradient_pct": 5.9837174345921085,
   "start_distance_m": 627.0,
   "end_distance_m": 637.0,
   "midpoint_distance_m": 632.0,
   "start_elevation_m": 969.1640375979111,
   "end_elevation_m": 969.7624093413704,
   "start_xy": [
    765412.6969683319,
    6485726.219873725
   ],
   "end_xy": [
    765414.6586525051,
    6485716.414171548
   ]
  },
  "max_20m": {
   "gradient_pct": 5.605730635563191,
   "start_distance_m": 621.0,
   "end_distance_m": 641.0,
   "midpoint_distance_m": 631.0,
   "start_elevation_m": 968.8365928791206,
   "end_elevation_m": 969.9577390062333,
   "start_xy": [
    765411.5199578281,
    6485732.103295033
   ],
   "end_xy": [
    765415.0762010831,
    6485712.454638977
   ]
  },
  "max_25m": {
   "gradient_pct": 5.563919022988557,
   "start_distance_m": 1109.0,
   "end_distance_m": 1134.0,
   "midpoint_distance_m": 1121.5,
   "start_elevation_m": 992.4749008544243,
   "end_elevation_m": 993.8658806101714,
   "start_xy": [
    765576.1147231295,
    6485314.199823304
   ],
   "end_xy": [
    765592.0824963383,
    6485294.963653759
   ]
  },
  "max_50m": {
   "gradient_pct": 5.299478657856753,
   "start_distance_m": 594.0,
   "end_distance_m": 644.0,
   "midpoint_distance_m": 619.0,
   "start_elevation_m": 967.4718836170443,
   "end_elevation_m": 970.1216229459727,
   "start_xy": [
    765403.5157286843,
    6485757.691363493
   ],
   "end_xy": [
    765415.0905898928,
    6485709.454673483
   ]
  },
  "max_100m": {
   "gradient_pct": 5.13940570841271,
   "start_distance_m": 587.0,
   "end_distance_m": 687.0,
   "midpoint_distance_m": 637.0,
   "start_elevation_m": 967.1250543110085,
   "end_elevation_m": 972.2644600194212,
   "start_xy": [
    765400.560089604,
    6485764.036771094
   ],
   "end_xy": [
    765409.3894929884,
    6485667.070976378
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 1.6107838979496591,
   "start_distance_m": 1894.0,
   "end_distance_m": 1899.0,
   "midpoint_distance_m": 1896.5,
   "start_elevation_m": 1028.7671795308079,
   "end_elevation_m": 1028.8477187257054,
   "start_xy": [
    765988.6337048411,
    6484660.811875625
   ],
   "end_xy": [
    765992.8724538937,
    6484658.159894013
   ]
  },
  "min_10m": {
   "gradient_pct": 2.170606527554355,
   "start_distance_m": 1892.0,
   "end_distance_m": 1902.0,
   "midpoint_distance_m": 1897.0,
   "start_elevation_m": 1028.6950981504262,
   "end_elevation_m": 1028.9121588031817,
   "start_xy": [
    765986.93820522,
    6484661.872668269
   ],
   "end_xy": [
    765995.4157033252,
    6484656.568705046
   ]
  },
  "min_20m": {
   "gradient_pct": 2.756822890054309,
   "start_distance_m": 1882.0,
   "end_distance_m": 1902.0,
   "midpoint_distance_m": 1892.0,
   "start_elevation_m": 1028.3607942251708,
   "end_elevation_m": 1028.9121588031817,
   "start_xy": [
    765978.6694104425,
    6484667.482454728
   ],
   "end_xy": [
    765995.4157033252,
    6484656.568705046
   ]
  },
  "min_25m": {
   "gradient_pct": 3.0431018171329924,
   "start_distance_m": 1877.0,
   "end_distance_m": 1902.0,
   "midpoint_distance_m": 1889.5,
   "start_elevation_m": 1028.1513833488984,
   "end_elevation_m": 1028.9121588031817,
   "start_xy": [
    765974.6547747399,
    6484670.462840639
   ],
   "end_xy": [
    765995.4157033252,
    6484656.568705046
   ]
  },
  "min_50m": {
   "gradient_pct": 3.623728816793573,
   "start_distance_m": 1852.0,
   "end_distance_m": 1902.0,
   "midpoint_distance_m": 1877.0,
   "start_elevation_m": 1027.100294394785,
   "end_elevation_m": 1028.9121588031817,
   "start_xy": [
    765954.5815962269,
    6484685.364770192
   ],
   "end_xy": [
    765995.4157033252,
    6484656.568705046
   ]
  },
  "min_100m": {
   "gradient_pct": 4.16099700880477,
   "start_distance_m": 1802.0,
   "end_distance_m": 1902.0,
   "midpoint_distance_m": 1852.0,
   "start_elevation_m": 1024.751161794377,
   "end_elevation_m": 1028.9121588031817,
   "start_xy": [
    765916.4612335167,
    6484717.594548302
   ],
   "end_xy": [
    765995.4157033252,
    6484656.568705046
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 8.27396446255193,
   "start_distance_m": 1128.0,
   "end_distance_m": 1130.0,
   "midpoint_distance_m": 1129.0,
   "start_elevation_m": 993.4994113729991,
   "end_elevation_m": 993.6648906622502,
   "start_xy": [
    765588.2502307682,
    6485299.58033445
   ],
   "end_xy": [
    765589.5276526249,
    6485298.041440886
   ]
  },
  "max_3m": {
   "gradient_pct": 7.226835889802412,
   "start_distance_m": 1121.0,
   "end_distance_m": 1124.0,
   "midpoint_distance_m": 1122.5,
   "start_elevation_m": 993.1245966494761,
   "end_elevation_m": 993.3414017261701,
   "start_xy": [
    765583.7792542698,
    6485304.966461923
   ],
   "end_xy": [
    765585.6953870548,
    6485302.658121577
   ]
  }
 },
 "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": 0.0,
   "obstruction_max_height_m": 0.0,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "1cc9fdcd6556a02163cb21acb2293cad3067d2a1",
   "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-mc6",
   "road_pbf": "block-batch-fr-mc6.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_E764-N6485_0m5@22LHD4ML-2025-09-15.tif",
   "data/cache/fr/ign-lidarhd_dtm_E764-N6486_0m5@22LHD4ML-2025-09-15.tif",
   "data/cache/fr/ign-lidarhd_dtm_E765-N6484_0m5@22LHD4ML-2025-09-15.tif",
   "data/cache/fr/ign-lidarhd_dtm_E765-N6485_0m5@22LHD4ML-2025-09-15.tif",
   "data/cache/fr/ign-lidarhd_dtm_E765-N6486_0m5@22LHD4ML-2025-09-15.tif",
   "data/cache/fr/ign-lidarhd_dtm_E766-N6484_0m5@22LHD4ML-2025-09-15.tif"
  ],
  "calculated_at": "2026-09-22T15:19:51+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc6.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc6",
  "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": [
   "E764-N6485",
   "E764-N6486",
   "E765-N6484",
   "E765-N6485",
   "E765-N6486",
   "E766-N6484"
  ],
  "elevation_blocks": [
   "22LHD4ML@2025-09-15"
  ],
  "ign_dalles": [
   "LHD_FXX_0764_6486_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0764_6487_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0765_6485_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0765_6486_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0765_6487_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0766_6485_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "22LHD4ML"
  ],
  "ign_editions": [
   "2025-09-15"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0764_6486_MNT_O_0M50_LAMB93_IGN69": "2025-09-15",
   "LHD_FXX_0764_6487_MNT_O_0M50_LAMB93_IGN69": "2025-09-15",
   "LHD_FXX_0765_6485_MNT_O_0M50_LAMB93_IGN69": "2025-09-15",
   "LHD_FXX_0765_6486_MNT_O_0M50_LAMB93_IGN69": "2025-09-15",
   "LHD_FXX_0765_6487_MNT_O_0M50_LAMB93_IGN69": "2025-09-15",
   "LHD_FXX_0766_6485_MNT_O_0M50_LAMB93_IGN69": "2025-09-15"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": 4,
  "carriageway": {
   "stations": 83,
   "stations_resolved": 83,
   "width_median_m": 9.25,
   "width_p10_m": 7.25,
   "width_min_m": 6.25,
   "width_max_m": 11.25,
   "bounded_share": 0.06,
   "unbounded_share": 0.94,
   "confidence_median": 0.0,
   "width_median_bounded_m": 9.75,
   "window_m": [
    1109.0,
    1134.0
   ],
   "width_at_max25_m": 8.25,
   "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": 83,
    "stations_resolved": 83,
    "width_median_m": 11.5,
    "width_p10_m": 9.5,
    "width_min_m": 6.0,
    "width_max_m": 12.0,
    "bounded_share": 0.181,
    "unbounded_share": 0.819,
    "confidence_median": 0.0,
    "width_median_bounded_m": 9.75,
    "window_m": [
     1109.0,
     1134.0
    ],
    "width_at_max25_m": 9.75,
    "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
   }
  },
  "named_from": {
   "col": "Col de Chemintrand",
   "source": "climbs/fr-passes-massif-central.yaml",
   "pass_node_distance_m": 0.0,
   "was": "Route de Viverols",
   "reason_code": "named-from-pass-list"
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Baffie",
  "county": "Puy-de-D\u00f4me",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}