{ "ocl_version": "0.1.0", "name": "Col de l'Iseran from Bonneval-sur-Arc", "slug": "col-de-l-iseran-from-bonneval-sur-arc", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 15.843452886701925, "diagnostic": true, "flags": [ "structure_excluded" ], "start_distance_m": 7217.0, "end_distance_m": 7219.0, "start_elevation_m": 2390.2904105020516, "end_elevation_m": 2390.6072795597856, "min_gradient_pct": -666.9914257886603, "suppressed_max_gradient_pct": 535.9939262668604, "suppressed_location_m": [ 8707.0, 8709.0 ] }, { "window_m": 3.0, "max_gradient_pct": 16.11107944719758, "diagnostic": true, "flags": [ "structure_excluded" ], "start_distance_m": 7222.0, "end_distance_m": 7225.0, "start_elevation_m": 2391.036873217854, "end_elevation_m": 2391.52020560127, "min_gradient_pct": -522.0187947967285, "suppressed_max_gradient_pct": 451.4076738523727, "suppressed_location_m": [ 8706.0, 8709.0 ] }, { "window_m": 5.0, "max_gradient_pct": 15.545281048216566, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 7218.0, "end_distance_m": 7223.0, "start_elevation_m": 2390.4572393555113, "end_elevation_m": 2391.234503407922, "min_gradient_pct": -349.7261278331189, "suppressed_max_gradient_pct": 317.7331803604011, "suppressed_location_m": [ 8706.0, 8711.0 ] }, { "window_m": 10.0, "max_gradient_pct": 15.14665435679035, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 7215.0, "end_distance_m": 7225.0, "start_elevation_m": 2390.005540165591, "end_elevation_m": 2391.52020560127, "min_gradient_pct": -181.15404737096014, "suppressed_max_gradient_pct": 199.04810190036642, "suppressed_location_m": [ 8706.0, 8716.0 ] }, { "window_m": 20.0, "max_gradient_pct": 14.2133053361772, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 7210.0, "end_distance_m": 7230.0, "start_elevation_m": 2389.3270190458584, "end_elevation_m": 2392.169680113094, "min_gradient_pct": -92.18636062518499, "suppressed_max_gradient_pct": 111.43717266396834, "suppressed_location_m": [ 8701.0, 8721.0 ] }, { "window_m": 25.0, "max_gradient_pct": 13.836549100333286, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 7212.0, "end_distance_m": 7237.0, "start_elevation_m": 2389.6016584211284, "end_elevation_m": 2393.0607956962117, "min_gradient_pct": -76.03699908519957, "suppressed_max_gradient_pct": 90.05421079088774, "suppressed_location_m": [ 8696.0, 8721.0 ] }, { "window_m": 50.0, "max_gradient_pct": 12.018897294216004, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 10526.0, "end_distance_m": 10576.0, "start_elevation_m": 2605.254251775897, "end_elevation_m": 2611.263700423005, "min_gradient_pct": -40.88951358070881, "suppressed_max_gradient_pct": 47.53366538026512, "suppressed_location_m": [ 8671.0, 8721.0 ] }, { "window_m": 100.0, "max_gradient_pct": 11.849205001532482, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 10476.0, "end_distance_m": 10576.0, "start_elevation_m": 2599.4144954214726, "end_elevation_m": 2611.263700423005, "min_gradient_pct": -17.154114504123754, "suppressed_max_gradient_pct": 26.61639723079952, "suppressed_location_m": [ 8621.0, 8721.0 ] } ], "shape": { "ascent_concentration": 0.284, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 142.0, "shape_class": "sustained" }, "length_m": 12341.696378593599, "start_elevation_m": 1849.9745512441461, "end_elevation_m": 2764.0274678125293, "endpoint_gain_m": 914.0529165683831, "overall_gradient_pct": 7.40621782070241, "accumulated_ascent_m": 976.2733791686733, "window_maxima": { "max_5m": { "gradient_pct": 15.545281048216566, "start_distance_m": 7218.0, "end_distance_m": 7223.0, "midpoint_distance_m": 7220.5, "start_elevation_m": 2390.4572393555113, "end_elevation_m": 2391.234503407922, "start_xy": [ 1016460.0639366363, 6485036.396121121 ], "end_xy": [ 1016459.2389113229, 6485041.32758472 ] }, "max_10m": { "gradient_pct": 15.14665435679035, "start_distance_m": 7215.0, "end_distance_m": 7225.0, "midpoint_distance_m": 7220.0, "start_elevation_m": 2390.005540165591, "end_elevation_m": 2391.52020560127, "start_xy": [ 1016460.5589518243, 6485033.4372429615 ], "end_xy": [ 1016458.9541100637, 6485043.306579303 ] }, "max_20m": { "gradient_pct": 14.2133053361772, "start_distance_m": 7210.0, "end_distance_m": 7230.0, "midpoint_distance_m": 7220.0, "start_elevation_m": 2389.3270190458584, "end_elevation_m": 2392.169680113094, "start_xy": [ 1016461.3839771377, 6485028.505779362 ], "end_xy": [ 1016458.3759328945, 6485048.273037916 ] }, "max_25m": { "gradient_pct": 13.836549100333286, "start_distance_m": 7212.0, "end_distance_m": 7237.0, "midpoint_distance_m": 7224.5, "start_elevation_m": 2389.6016584211284, "end_elevation_m": 2393.0607956962117, "start_xy": [ 1016461.0539670123, 6485030.478364802 ], "end_xy": [ 1016457.5664848578, 6485055.226079975 ] }, "max_50m": { "gradient_pct": 12.018897294216004, "start_distance_m": 10526.0, "end_distance_m": 10576.0, "midpoint_distance_m": 10551.0, "start_elevation_m": 2605.254251775897, "end_elevation_m": 2611.263700423005, "start_xy": [ 1015091.1955723921, 6487324.918340128 ], "end_xy": [ 1015119.6125471734, 6487365.860674306 ] }, "max_100m": { "gradient_pct": 11.849205001532482, "start_distance_m": 10476.0, "end_distance_m": 10576.0, "midpoint_distance_m": 10526.0, "start_elevation_m": 2599.4144954214726, "end_elevation_m": 2611.263700423005, "start_xy": [ 1015069.47558189, 6487279.977540076 ], "end_xy": [ 1015119.6125471734, 6487365.860674306 ] } }, "window_minima": { "min_5m": { "gradient_pct": -349.7261278331189, "start_distance_m": 8750.0, "end_distance_m": 8755.0, "midpoint_distance_m": 8752.5, "start_elevation_m": 2511.1486664294207, "end_elevation_m": 2493.6623600377648, "start_xy": [ 1015704.6291144621, 6486085.154467246 ], "end_xy": [ 1015699.6302820132, 6486085.0464202715 ] }, "min_10m": { "gradient_pct": -181.15404737096014, "start_distance_m": 8746.0, "end_distance_m": 8756.0, "midpoint_distance_m": 8751.0, "start_elevation_m": 2511.696799668997, "end_elevation_m": 2493.581394931901, "start_xy": [ 1015708.6281804211, 6486085.240904824 ], "end_xy": [ 1015698.6305155234, 6486085.024810878 ] }, "min_20m": { "gradient_pct": -92.18636062518499, "start_distance_m": 8735.0, "end_distance_m": 8755.0, "midpoint_distance_m": 8745.0, "start_elevation_m": 2512.0996321628018, "end_elevation_m": 2493.6623600377648, "start_xy": [ 1015719.6256118086, 6486085.478608165 ], "end_xy": [ 1015699.6302820132, 6486085.0464202715 ] }, "min_25m": { "gradient_pct": -76.03699908519957, "start_distance_m": 8733.0, "end_distance_m": 8758.0, "midpoint_distance_m": 8745.5, "start_elevation_m": 2512.7021414975843, "end_elevation_m": 2493.6928917262844, "start_xy": [ 1015721.6251447881, 6486085.521826954 ], "end_xy": [ 1015696.631348858, 6486084.967116556 ] }, "min_50m": { "gradient_pct": -40.88951358070881, "start_distance_m": 8721.0, "end_distance_m": 8771.0, "midpoint_distance_m": 8746.0, "start_elevation_m": 2514.73661446931, "end_elevation_m": 2494.2918576789557, "start_xy": [ 1015733.6223426653, 6486085.7811396895 ], "end_xy": [ 1015683.6368110604, 6486084.590304367 ] }, "min_100m": { "gradient_pct": -17.154114504123754, "start_distance_m": 8721.0, "end_distance_m": 8821.0, "midpoint_distance_m": 8771.0, "start_elevation_m": 2514.73661446931, "end_elevation_m": 2497.5824999651863, "start_xy": [ 1015733.6223426653, 6486085.7811396895 ], "end_xy": [ 1015634.5310914612, 6486081.122754973 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 15.843452886701925, "start_distance_m": 7217.0, "end_distance_m": 7219.0, "midpoint_distance_m": 7218.0, "start_elevation_m": 2390.2904105020516, "end_elevation_m": 2390.6072795597856, "start_xy": [ 1016460.2289416989, 6485035.409828401 ], "end_xy": [ 1016459.8989315736, 6485037.382413841 ] }, "max_3m": { "gradient_pct": 16.11107944719758, "start_distance_m": 7222.0, "end_distance_m": 7225.0, "midpoint_distance_m": 7223.5, "start_elevation_m": 2391.036873217854, "end_elevation_m": 2391.52020560127, "start_xy": [ 1016459.4039163855, 6485040.341292 ], "end_xy": [ 1016458.9541100637, 6485043.306579303 ] } }, "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": 0.012, "windows_resited": [ 2.0, 3.0, 5.0, 10.0, 20.0, 25.0, 50.0, 100.0 ], "windows_unresolved": [] }, "placement_suppression": { "masked_fraction": 0.014, "windows_resited": [], "windows_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.004, "obstruction_max_height_m": 10.9, "flagged_windows_m": [] }, "excluded_ranges_m": [ [ 4137.0, 4171.0 ], [ 8160.0, 8180.0 ], [ 8549.0, 8567.0 ], [ 8700.0, 8760.0 ], [ 9636.0, 9666.0 ] ], "review": [], "extent": [ "may_start_earlier" ] }, "provenance": { "analysis_version": "0.1.0", "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_E1014-N6486_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1014-N6487_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1015-N6482_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1015-N6483_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1015-N6484_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1015-N6485_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1015-N6486_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1015-N6487_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1015-N6488_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1016-N6482_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1016-N6483_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1016-N6484_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1016-N6485_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1016-N6486_0m5.tif" ], "calculated_at": "2026-09-17T02:33:26+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps4.osm.pbf", "osm_snapshot": "", "run_id": "fr-alps4", "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": [ "E1014-N6486", "E1014-N6487", "E1015-N6482", "E1015-N6483", "E1015-N6484", "E1015-N6485", "E1015-N6486", "E1015-N6487", "E1015-N6488", "E1016-N6482", "E1016-N6483", "E1016-N6484", "E1016-N6485", "E1016-N6486" ], "elevation_blocks": [ "21LHD5RL@2025-06-04", "21LHD6RM@2025-06-06" ], "ign_dalles": [ "LHD_FXX_1014_6487_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1014_6488_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1015_6483_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1015_6484_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1015_6485_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1015_6486_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1015_6487_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1015_6488_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1015_6489_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1016_6483_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1016_6484_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1016_6485_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1016_6486_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1016_6487_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD5RL", "21LHD6RM" ], "ign_editions": [ "2025-06-04", "2025-06-06" ], "ign_dsm_edition": { "LHD_FXX_1014_6487_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1014_6488_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1015_6483_MNT_O_0M50_LAMB93_IGN69": "2025-06-06", "LHD_FXX_1015_6484_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1015_6485_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1015_6486_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1015_6487_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1015_6488_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1015_6489_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1016_6483_MNT_O_0M50_LAMB93_IGN69": "2025-06-06", "LHD_FXX_1016_6484_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1016_6485_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1016_6486_MNT_O_0M50_LAMB93_IGN69": "2025-06-04", "LHD_FXX_1016_6487_MNT_O_0M50_LAMB93_IGN69": "2025-06-04" }, "climb_origin": "named-pass", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 500, "stations_resolved": 500, "width_median_m": 6.75, "width_p10_m": 5.5, "width_min_m": 1.0, "width_max_m": 12.0, "bounded_share": 0.38, "unbounded_share": 0.62, "confidence_median": 0.0, "width_median_bounded_m": 6.75, "window_m": [ 7212.0, 7237.0 ], "width_at_max25_m": 6.5, "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": 500, "stations_resolved": 500, "width_median_m": 9.0, "width_p10_m": 7.25, "width_min_m": 1.5, "width_max_m": 12.0, "bounded_share": 0.704, "unbounded_share": 0.296, "confidence_median": 1.0, "width_median_bounded_m": 8.25, "window_m": [ 7212.0, 7237.0 ], "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 } }, "license": "ODbL-1.0", "license_url": "https://howsteep.org/licensing" }, "area": { "place": "Bonneval-sur-Arc", "county": "Savoie", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }