{ "ocl_version": "0.1.0", "name": "Col d'Izoard from Cervi\u00e8res", "slug": "col-d-izoard-from-cervieres", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 16.068296433195428, "diagnostic": true, "flags": [ "structure_excluded" ], "start_distance_m": 5853.0, "end_distance_m": 5855.0, "start_elevation_m": 2078.2937489830456, "end_elevation_m": 2078.6151149117095, "min_gradient_pct": -136.36615901709774, "suppressed_max_gradient_pct": 131.22183933110136, "suppressed_location_m": [ 2142.0, 2144.0 ] }, { "window_m": 3.0, "max_gradient_pct": 14.143965780097764, "diagnostic": true, "flags": [ "structure_excluded" ], "start_distance_m": 7108.0, "end_distance_m": 7111.0, "start_elevation_m": 2181.5778513920427, "end_elevation_m": 2182.0021703654456, "min_gradient_pct": -89.40232136621944, "suppressed_max_gradient_pct": 110.21866512389049, "suppressed_location_m": [ 4672.0, 4675.0 ] }, { "window_m": 5.0, "max_gradient_pct": 14.08344097002555, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 5850.0, "end_distance_m": 5855.0, "start_elevation_m": 2077.910942863208, "end_elevation_m": 2078.6151149117095, "min_gradient_pct": -63.32917628486939, "suppressed_max_gradient_pct": 71.09345063709952, "suppressed_location_m": [ 4672.0, 4677.0 ] }, { "window_m": 10.0, "max_gradient_pct": 12.462975983062279, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 5730.0, "end_distance_m": 5740.0, "start_elevation_m": 2064.6535082794603, "end_elevation_m": 2065.8998058777665, "min_gradient_pct": -35.3532340855827, "suppressed_max_gradient_pct": 46.117759548910726, "suppressed_location_m": [ 6893.0, 6903.0 ] }, { "window_m": 20.0, "max_gradient_pct": 12.148104999916995, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 5724.0, "end_distance_m": 5744.0, "start_elevation_m": 2063.936272515145, "end_elevation_m": 2066.3658935151284, "min_gradient_pct": -15.53351510093762, "suppressed_max_gradient_pct": 26.11773979030204, "suppressed_location_m": [ 6893.0, 6913.0 ] }, { "window_m": 25.0, "max_gradient_pct": 11.917298061949623, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 5718.0, "end_distance_m": 5743.0, "start_elevation_m": 2063.248062257048, "end_elevation_m": 2066.2273867725353, "min_gradient_pct": -11.447954737674081, "suppressed_max_gradient_pct": 22.007890777861576, "suppressed_location_m": [ 4672.0, 4697.0 ] }, { "window_m": 50.0, "max_gradient_pct": 11.502813254838657, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 5711.0, "end_distance_m": 5761.0, "start_elevation_m": 2062.5603088709013, "end_elevation_m": 2068.3117154983206, "min_gradient_pct": -2.8679950321829892, "suppressed_max_gradient_pct": 15.542220224265748, "suppressed_location_m": [ 4672.0, 4722.0 ] }, { "window_m": 100.0, "max_gradient_pct": 11.193026954485958, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 5718.0, "end_distance_m": 5818.0, "start_elevation_m": 2063.248062257048, "end_elevation_m": 2074.441089211534, "min_gradient_pct": 2.0835594612931345, "suppressed_max_gradient_pct": 12.693422430022338, "suppressed_location_m": [ 4672.0, 4772.0 ] } ], "shape": { "ascent_concentration": 0.274, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 75.0, "shape_class": "sustained" }, "length_m": 9465.870882190819, "start_elevation_m": 1637.7110327011692, "end_elevation_m": 2360.4248914062473, "endpoint_gain_m": 722.7138587050781, "overall_gradient_pct": 7.63494313095691, "accumulated_ascent_m": 738.8615375509185, "window_maxima": { "max_5m": { "gradient_pct": 14.08344097002555, "start_distance_m": 5850.0, "end_distance_m": 5855.0, "midpoint_distance_m": 5852.5, "start_elevation_m": 2077.910942863208, "end_elevation_m": 2078.6151149117095, "start_xy": [ 994139.7091417944, 6421698.190653325 ], "end_xy": [ 994143.5527721671, 6421695.01190187 ] }, "max_10m": { "gradient_pct": 12.462975983062279, "start_distance_m": 5730.0, "end_distance_m": 5740.0, "midpoint_distance_m": 5735.0, "start_elevation_m": 2064.6535082794603, "end_elevation_m": 2065.8998058777665, "start_xy": [ 994093.9131414724, 6421808.563216222 ], "end_xy": [ 994096.9291733121, 6421799.0288808 ] }, "max_20m": { "gradient_pct": 12.148104999916995, "start_distance_m": 5724.0, "end_distance_m": 5744.0, "midpoint_distance_m": 5734.0, "start_elevation_m": 2063.936272515145, "end_elevation_m": 2066.3658935151284, "start_xy": [ 994092.1035223686, 6421814.283817476 ], "end_xy": [ 994098.135586048, 6421795.215146631 ] }, "max_25m": { "gradient_pct": 11.917298061949623, "start_distance_m": 5718.0, "end_distance_m": 5743.0, "midpoint_distance_m": 5730.5, "start_elevation_m": 2063.248062257048, "end_elevation_m": 2066.2273867725353, "start_xy": [ 994090.3421481497, 6421820.019423062 ], "end_xy": [ 994097.833982864, 6421796.1685801735 ] }, "max_50m": { "gradient_pct": 11.502813254838657, "start_distance_m": 5711.0, "end_distance_m": 5761.0, "midpoint_distance_m": 5736.0, "start_elevation_m": 2062.5603088709013, "end_elevation_m": 2068.3117154983206, "start_xy": [ 994088.2957980919, 6421826.713633354 ], "end_xy": [ 994103.4356577914, 6421779.069932628 ] }, "max_100m": { "gradient_pct": 11.193026954485958, "start_distance_m": 5718.0, "end_distance_m": 5818.0, "midpoint_distance_m": 5768.0, "start_elevation_m": 2063.248062257048, "end_elevation_m": 2074.441089211534, "start_xy": [ 994090.3421481497, 6421820.019423062 ], "end_xy": [ 994124.9582775175, 6421726.291646004 ] } }, "window_minima": { "min_5m": { "gradient_pct": -63.32917628486939, "start_distance_m": 6886.0, "end_distance_m": 6891.0, "midpoint_distance_m": 6888.5, "start_elevation_m": 2163.307810819804, "end_elevation_m": 2160.1413520055607, "start_xy": [ 994402.3387623796, 6421165.724263085 ], "end_xy": [ 994406.7899590601, 6421167.99570058 ] }, "min_10m": { "gradient_pct": -35.3532340855827, "start_distance_m": 6883.0, "end_distance_m": 6893.0, "midpoint_distance_m": 6888.0, "start_elevation_m": 2163.1716269072567, "end_elevation_m": 2159.6363034986985, "start_xy": [ 994399.6214014416, 6421164.453063048 ], "end_xy": [ 994408.532866274, 6421168.975772368 ] }, "min_20m": { "gradient_pct": -15.53351510093762, "start_distance_m": 6873.0, "end_distance_m": 6893.0, "midpoint_distance_m": 6883.0, "start_elevation_m": 2162.743006518886, "end_elevation_m": 2159.6363034986985, "start_xy": [ 994389.9525320159, 6421162.153606225 ], "end_xy": [ 994408.532866274, 6421168.975772368 ] }, "min_25m": { "gradient_pct": -11.447954737674081, "start_distance_m": 6868.0, "end_distance_m": 6893.0, "midpoint_distance_m": 6880.5, "start_elevation_m": 2162.498292183117, "end_elevation_m": 2159.6363034986985, "start_xy": [ 994384.968290284, 6421162.246204224 ], "end_xy": [ 994408.532866274, 6421168.975772368 ] }, "min_50m": { "gradient_pct": -2.8679950321829892, "start_distance_m": 6843.0, "end_distance_m": 6893.0, "midpoint_distance_m": 6868.0, "start_elevation_m": 2161.07030101479, "end_elevation_m": 2159.6363034986985, "start_xy": [ 994363.2677332542, 6421173.638922841 ], "end_xy": [ 994408.532866274, 6421168.975772368 ] }, "min_100m": { "gradient_pct": 2.0835594612931345, "start_distance_m": 6793.0, "end_distance_m": 6893.0, "midpoint_distance_m": 6843.0, "start_elevation_m": 2157.5527440374053, "end_elevation_m": 2159.6363034986985, "start_xy": [ 994342.6104078199, 6421218.430666794 ], "end_xy": [ 994408.532866274, 6421168.975772368 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 16.068296433195428, "start_distance_m": 5853.0, "end_distance_m": 5855.0, "midpoint_distance_m": 5854.0, "start_elevation_m": 2078.2937489830456, "end_elevation_m": 2078.6151149117095, "start_xy": [ 994141.9431958251, 6421696.195060161 ], "end_xy": [ 994143.5527721671, 6421695.01190187 ] }, "max_3m": { "gradient_pct": 14.143965780097764, "start_distance_m": 7108.0, "end_distance_m": 7111.0, "midpoint_distance_m": 7109.5, "start_elevation_m": 2181.5778513920427, "end_elevation_m": 2182.0021703654456, "start_xy": [ 994516.3488006152, 6421329.472361273 ], "end_xy": [ 994519.3261511108, 6421329.106091453 ] } }, "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": 0.009, "windows_resited": [ 2.0, 3.0, 5.0, 10.0, 20.0, 25.0, 50.0, 100.0 ], "windows_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.003, "obstruction_max_height_m": 10.12, "flagged_windows_m": [] }, "excluded_ranges_m": [ [ 1468.0, 1479.0 ], [ 2136.0, 2146.0 ], [ 4667.0, 4677.0 ], [ 6881.0, 6904.0 ], [ 8066.0, 8088.0 ], [ 8180.0, 8185.0 ] ], "review": [], "extent": [] }, "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_E993-N6421_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E993-N6422_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E993-N6423_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E993-N6424_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E993-N6425_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E994-N6420_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E994-N6421_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E994-N6422_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E994-N6423_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E994-N6424_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E994-N6425_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E995-N6420_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E995-N6421_0m5.tif" ], "calculated_at": "2026-09-17T02:42:49+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": [ "E993-N6421", "E993-N6422", "E993-N6423", "E993-N6424", "E993-N6425", "E994-N6420", "E994-N6421", "E994-N6422", "E994-N6423", "E994-N6424", "E994-N6425", "E995-N6420", "E995-N6421" ], "elevation_blocks": [ "21LHD8RN@2025-03-15" ], "ign_dalles": [ "LHD_FXX_0993_6422_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0993_6423_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0993_6424_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0993_6425_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0993_6426_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0994_6421_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0994_6422_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0994_6423_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0994_6424_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0994_6425_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0994_6426_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0995_6421_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0995_6422_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD8RN" ], "ign_editions": [ "2025-03-15" ], "ign_dsm_edition": { "LHD_FXX_0993_6422_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0993_6423_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0993_6424_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0993_6425_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0993_6426_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0994_6421_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0994_6422_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0994_6423_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0994_6424_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0994_6425_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0994_6426_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0995_6421_MNT_O_0M50_LAMB93_IGN69": "2025-03-15", "LHD_FXX_0995_6422_MNT_O_0M50_LAMB93_IGN69": "2025-03-15" }, "climb_origin": "named-pass", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 385, "stations_resolved": 385, "width_median_m": 8.0, "width_p10_m": 6.0, "width_min_m": 1.25, "width_max_m": 12.0, "bounded_share": 0.288, "unbounded_share": 0.712, "confidence_median": 0.0, "width_median_bounded_m": 8.25, "window_m": [ 5718.0, 5743.0 ], "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": 385, "stations_resolved": 385, "width_median_m": 10.25, "width_p10_m": 8.0, "width_min_m": 1.0, "width_max_m": 12.0, "bounded_share": 0.501, "unbounded_share": 0.499, "confidence_median": 0.836, "width_median_bounded_m": 9.25, "window_m": [ 5718.0, 5743.0 ], "width_at_max25_m": 11.25, "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": "Cervi\u00e8res", "county": "Hautes-Alpes", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }