{
 "ocl_version": "0.1.0",
 "name": "Col de Fontfroide from Cambon",
 "slug": "col-de-fontfroide-from-cambon",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 10.2648260122578,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 3392.0,
   "end_distance_m": 3394.0,
   "start_elevation_m": 972.2904222211457,
   "end_elevation_m": 972.4957187413909,
   "min_gradient_pct": -5.606590887794027,
   "suppressed_max_gradient_pct": 145.38908899191938,
   "suppressed_location_m": [
    2547.0,
    2549.0
   ],
   "suppressed_min_gradient_pct": -145.2739807553428,
   "suppressed_min_location_m": [
    2542.0,
    2544.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 8.21589672045775,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "structure_excluded_min",
    "canopy_or_structure"
   ],
   "start_distance_m": 3392.0,
   "end_distance_m": 3395.0,
   "start_elevation_m": 972.2904222211457,
   "end_elevation_m": 972.5368991227595,
   "min_gradient_pct": -4.12600149481553,
   "suppressed_max_gradient_pct": 122.73045341060349,
   "suppressed_location_m": [
    2546.0,
    2549.0
   ],
   "suppressed_min_gradient_pct": -114.07738068347346,
   "suppressed_min_location_m": [
    2541.0,
    2544.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 6.830364120141894,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 430.0,
   "end_distance_m": 435.0,
   "start_elevation_m": 888.3623108586116,
   "end_elevation_m": 888.7038290646187,
   "min_gradient_pct": -3.44358365584867,
   "suppressed_max_gradient_pct": 76.49264411805234,
   "suppressed_location_m": [
    2546.0,
    2551.0
   ],
   "suppressed_min_gradient_pct": -71.14931285088687,
   "suppressed_min_location_m": [
    2541.0,
    2546.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 6.469392072970095,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 425.0,
   "end_distance_m": 435.0,
   "start_elevation_m": 888.0568898573217,
   "end_elevation_m": 888.7038290646187,
   "min_gradient_pct": -3.1701146891543885,
   "suppressed_max_gradient_pct": 39.611345334068346,
   "suppressed_location_m": [
    2546.0,
    2556.0
   ],
   "suppressed_min_gradient_pct": -35.14002465581598,
   "suppressed_min_location_m": [
    2536.0,
    2546.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 6.177548791485492,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 415.0,
   "end_distance_m": 435.0,
   "start_elevation_m": 887.4683193063216,
   "end_elevation_m": 888.7038290646187,
   "min_gradient_pct": -2.8932824393808687,
   "suppressed_max_gradient_pct": 21.85112704375797,
   "suppressed_location_m": [
    2546.0,
    2566.0
   ],
   "suppressed_min_gradient_pct": -16.615959954432924,
   "suppressed_min_location_m": [
    2526.0,
    2546.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 6.112489701003142,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 412.0,
   "end_distance_m": 437.0,
   "start_elevation_m": 887.2891540512433,
   "end_elevation_m": 888.817276476494,
   "min_gradient_pct": -2.8045266182462,
   "suppressed_max_gradient_pct": 18.301282300775256,
   "suppressed_location_m": [
    2546.0,
    2571.0
   ],
   "suppressed_min_gradient_pct": -12.779520104608764,
   "suppressed_min_location_m": [
    2521.0,
    2546.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 5.374734744706984,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "structure_excluded_min"
   ],
   "start_distance_m": 2810.0,
   "end_distance_m": 2860.0,
   "start_elevation_m": 952.4605360593835,
   "end_elevation_m": 955.147903431737,
   "min_gradient_pct": -2.3386980804830273,
   "suppressed_max_gradient_pct": 10.365349411307307,
   "suppressed_location_m": [
    2546.0,
    2596.0
   ],
   "suppressed_min_gradient_pct": -4.97249709461903,
   "suppressed_min_location_m": [
    2496.0,
    2546.0
   ]
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 4.7531341076129365,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 2803.0,
   "end_distance_m": 2903.0,
   "start_elevation_m": 952.1594935517193,
   "end_elevation_m": 956.9126276593322,
   "min_gradient_pct": -1.9091272157183994,
   "suppressed_max_gradient_pct": 5.738579274205108,
   "suppressed_location_m": [
    2546.0,
    2646.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.338,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 15.0,
  "shape_class": "sustained"
 },
 "length_m": 3660.9875091309095,
 "start_elevation_m": 884.8121961425721,
 "end_elevation_m": 972.652374138678,
 "endpoint_gain_m": 87.84017799610592,
 "overall_gradient_pct": 2.3993574896670027,
 "accumulated_ascent_m": 99.28037307846284,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 6.830364120141894,
   "start_distance_m": 430.0,
   "end_distance_m": 435.0,
   "midpoint_distance_m": 432.5,
   "start_elevation_m": 888.3623108586116,
   "end_elevation_m": 888.7038290646187,
   "start_xy": [
    688134.3891446698,
    6279601.066228714
   ],
   "end_xy": [
    688129.4009922191,
    6279600.72222998
   ]
  },
  "max_10m": {
   "gradient_pct": 6.469392072970095,
   "start_distance_m": 425.0,
   "end_distance_m": 435.0,
   "midpoint_distance_m": 430.0,
   "start_elevation_m": 888.0568898573217,
   "end_elevation_m": 888.7038290646187,
   "start_xy": [
    688139.3772971204,
    6279601.410227448
   ],
   "end_xy": [
    688129.4009922191,
    6279600.72222998
   ]
  },
  "max_20m": {
   "gradient_pct": 6.177548791485492,
   "start_distance_m": 415.0,
   "end_distance_m": 435.0,
   "midpoint_distance_m": 425.0,
   "start_elevation_m": 887.4683193063216,
   "end_elevation_m": 888.7038290646187,
   "start_xy": [
    688149.0113477231,
    6279603.93023274
   ],
   "end_xy": [
    688129.4009922191,
    6279600.72222998
   ]
  },
  "max_25m": {
   "gradient_pct": 6.112489701003142,
   "start_distance_m": 412.0,
   "end_distance_m": 437.0,
   "midpoint_distance_m": 424.5,
   "start_elevation_m": 887.2891540512433,
   "end_elevation_m": 888.817276476494,
   "start_xy": [
    688151.7636877481,
    6279605.123809041
   ],
   "end_xy": [
    688127.4057312389,
    6279600.584630487
   ]
  },
  "max_50m": {
   "gradient_pct": 5.374734744706984,
   "start_distance_m": 2810.0,
   "end_distance_m": 2860.0,
   "midpoint_distance_m": 2835.0,
   "start_elevation_m": 952.4605360593835,
   "end_elevation_m": 955.147903431737,
   "start_xy": [
    687495.2939224591,
    6278331.295012409
   ],
   "end_xy": [
    687484.0712390764,
    6278282.643572959
   ]
  },
  "max_100m": {
   "gradient_pct": 4.7531341076129365,
   "start_distance_m": 2803.0,
   "end_distance_m": 2903.0,
   "midpoint_distance_m": 2853.0,
   "start_elevation_m": 952.1594935517193,
   "end_elevation_m": 956.9126276593322,
   "start_xy": [
    687496.6478918766,
    6278338.16281896
   ],
   "end_xy": [
    687452.1525253396,
    6278256.792757542
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.44358365584867,
   "start_distance_m": 3573.0,
   "end_distance_m": 3578.0,
   "midpoint_distance_m": 3575.5,
   "start_elevation_m": 974.1149780535211,
   "end_elevation_m": 973.9427988707287,
   "start_xy": [
    687088.0238348689,
    6277864.197504701
   ],
   "end_xy": [
    687085.4255598481,
    6277859.925623743
   ]
  },
  "min_10m": {
   "gradient_pct": -3.1701146891543885,
   "start_distance_m": 3565.0,
   "end_distance_m": 3575.0,
   "midpoint_distance_m": 3570.0,
   "start_elevation_m": 974.3403958520839,
   "end_elevation_m": 974.0233843831685,
   "start_xy": [
    687092.8069057503,
    6277870.609469098
   ],
   "end_xy": [
    687086.9845248606,
    6277862.488752318
   ]
  },
  "min_20m": {
   "gradient_pct": -2.8932824393808687,
   "start_distance_m": 3566.0,
   "end_distance_m": 3586.0,
   "midpoint_distance_m": 3576.0,
   "start_elevation_m": 974.3207256035604,
   "end_elevation_m": 973.7420691156842,
   "start_xy": [
    687092.2077955346,
    6277869.808802533
   ],
   "end_xy": [
    687081.2683198146,
    6277853.090614211
   ]
  },
  "min_25m": {
   "gradient_pct": -2.8045266182462,
   "start_distance_m": 3563.0,
   "end_distance_m": 3588.0,
   "midpoint_distance_m": 3575.5,
   "start_elevation_m": 974.3893206033199,
   "end_elevation_m": 973.6881889487584,
   "start_xy": [
    687094.0051261815,
    6277872.21080223
   ],
   "end_xy": [
    687080.2290098063,
    6277851.381861828
   ]
  },
  "min_50m": {
   "gradient_pct": -2.3386980804830273,
   "start_distance_m": 3542.0,
   "end_distance_m": 3592.0,
   "midpoint_distance_m": 3567.0,
   "start_elevation_m": 974.7944936607241,
   "end_elevation_m": 973.6251446204826,
   "start_xy": [
    687107.1559532152,
    6277888.52961407
   ],
   "end_xy": [
    687078.1503897895,
    6277847.964357062
   ]
  },
  "min_100m": {
   "gradient_pct": -1.9091272157183994,
   "start_distance_m": 3543.0,
   "end_distance_m": 3643.0,
   "midpoint_distance_m": 3593.0,
   "start_elevation_m": 974.7840977956098,
   "end_elevation_m": 972.8749705798914,
   "start_xy": [
    687106.446294704,
    6277887.825068261
   ],
   "end_xy": [
    687052.9588370774,
    6277803.682299176
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 10.2648260122578,
   "start_distance_m": 3392.0,
   "end_distance_m": 3394.0,
   "midpoint_distance_m": 3393.0,
   "start_elevation_m": 972.2904222211457,
   "end_elevation_m": 972.4957187413909,
   "start_xy": [
    687241.2696011123,
    6277943.915124839
   ],
   "end_xy": [
    687240.0780068141,
    6277942.308854927
   ]
  },
  "max_3m": {
   "gradient_pct": 8.21589672045775,
   "start_distance_m": 3392.0,
   "end_distance_m": 3395.0,
   "midpoint_distance_m": 3393.5,
   "start_elevation_m": 972.2904222211457,
   "end_elevation_m": 972.5368991227595,
   "start_xy": [
    687241.2696011123,
    6277943.915124839
   ],
   "end_xy": [
    687239.482209665,
    6277941.505719972
   ]
  }
 },
 "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": 0.008,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0,
    100.0
   ],
   "windows_unresolved": [],
   "minima_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    50.0
   ],
   "minima_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.187,
   "obstruction_max_height_m": 19.37,
   "flagged_windows_m": [
    2,
    3
   ]
  },
  "excluded_ranges_m": [
   [
    1483.0,
    1492.0
   ],
   [
    2536.0,
    2554.0
   ]
  ],
  "review": [],
  "extent": []
 },
 "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-mc-cols",
   "road_pbf": "block-batch-fr-mc-cols.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_E687-N6277_0m5@21LHD3LQ-2025-05-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E687-N6278_0m5@21LHD3LQ-2025-05-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E687-N6279_0m5@21LHD3LQ-2025-05-19.tif",
   "data/cache/fr/ign-lidarhd_dtm_E688-N6279_0m5@21LHD3LQ-2025-05-19.tif"
  ],
  "calculated_at": "2026-09-22T22:19:51+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc-cols.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-mc-cols",
  "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": [
   "E687-N6277",
   "E687-N6278",
   "E687-N6279",
   "E688-N6279"
  ],
  "elevation_blocks": [
   "21LHD3LQ@2025-05-19"
  ],
  "ign_dalles": [
   "LHD_FXX_0687_6278_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0687_6279_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0687_6280_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0688_6280_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD3LQ"
  ],
  "ign_editions": [
   "2025-05-19"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0687_6278_MNT_O_0M50_LAMB93_IGN69": "2025-05-19",
   "LHD_FXX_0687_6279_MNT_O_0M50_LAMB93_IGN69": "2025-05-19",
   "LHD_FXX_0687_6280_MNT_O_0M50_LAMB93_IGN69": "2025-05-19",
   "LHD_FXX_0688_6280_MNT_O_0M50_LAMB93_IGN69": "2025-05-19"
  },
  "climb_origin": "named-pass",
  "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked",
  "carriageway": {
   "stations": 153,
   "stations_resolved": 153,
   "width_median_m": 7.75,
   "width_p10_m": 6.0,
   "width_min_m": 3.0,
   "width_max_m": 11.25,
   "bounded_share": 0.235,
   "unbounded_share": 0.765,
   "confidence_median": 0.0,
   "width_median_bounded_m": 7.88,
   "window_m": [
    412.0,
    437.0
   ],
   "width_at_max25_m": 9.0,
   "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": 153,
    "stations_resolved": 153,
    "width_median_m": 8.0,
    "width_p10_m": 1.0,
    "width_min_m": 0.0,
    "width_max_m": 12.0,
    "bounded_share": 0.66,
    "unbounded_share": 0.34,
    "confidence_median": 1.0,
    "width_median_bounded_m": 5.25,
    "window_m": [
     412.0,
     437.0
    ],
    "width_at_max25_m": 12.0,
    "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": "Cambon-et-Salvergues",
  "county": "H\u00e9rault",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}