{ "ocl_version": "0.1.0", "name": "Col du Cucheron from Saint-Pierre-d'Entremont (Is\u00e8re)", "slug": "col-du-cucheron-from-saint-pierre-d-entremont-isere", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 26.97107371676566, "diagnostic": true, "flags": [ "structure_excluded" ], "start_distance_m": 425.0, "end_distance_m": 427.0, "start_elevation_m": 696.736990659678, "end_elevation_m": 697.2764121340133, "min_gradient_pct": -79.45416985923544, "suppressed_max_gradient_pct": 98.86045040174736, "suppressed_location_m": [ 4674.0, 4676.0 ] }, { "window_m": 3.0, "max_gradient_pct": 21.57317926742432, "diagnostic": true, "flags": [ "structure_excluded" ], "start_distance_m": 425.0, "end_distance_m": 428.0, "start_elevation_m": 696.736990659678, "end_elevation_m": 697.3841860377007, "min_gradient_pct": -77.61233326021208, "suppressed_max_gradient_pct": 96.87588351995373, "suppressed_location_m": [ 4674.0, 4677.0 ] }, { "window_m": 5.0, "max_gradient_pct": 18.854297283212418, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 475.0, "end_distance_m": 480.0, "start_elevation_m": 700.5099445361868, "end_elevation_m": 701.4526594003474, "min_gradient_pct": -69.41025373273987, "suppressed_max_gradient_pct": 85.55146078766484, "suppressed_location_m": [ 4674.0, 4679.0 ] }, { "window_m": 10.0, "max_gradient_pct": 15.357696495668733, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 475.0, "end_distance_m": 485.0, "start_elevation_m": 700.5099445361868, "end_elevation_m": 702.0457141857537, "min_gradient_pct": -58.53953961232719, "suppressed_max_gradient_pct": 57.12079305135717, "suppressed_location_m": [ 4673.0, 4683.0 ] }, { "window_m": 20.0, "max_gradient_pct": 13.58056423377434, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 474.0, "end_distance_m": 494.0, "start_elevation_m": 700.4171327957804, "end_elevation_m": 703.1332456425353, "min_gradient_pct": -30.936930544320944, "suppressed_max_gradient_pct": 29.49273237196337, "suppressed_location_m": [ 4673.0, 4693.0 ] }, { "window_m": 25.0, "max_gradient_pct": 13.31753996605994, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 475.0, "end_distance_m": 500.0, "start_elevation_m": 700.5099445361868, "end_elevation_m": 703.8393295277018, "min_gradient_pct": -25.407019571265664, "suppressed_max_gradient_pct": 24.149134985013916, "suppressed_location_m": [ 4673.0, 4698.0 ] }, { "window_m": 50.0, "max_gradient_pct": 11.377068144541454, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 384.0, "end_distance_m": 434.0, "start_elevation_m": 692.2237613926785, "end_elevation_m": 697.9122954649492, "min_gradient_pct": -15.158735794569566, "suppressed_max_gradient_pct": 14.493857707054758, "suppressed_location_m": [ 4673.0, 4723.0 ] }, { "window_m": 100.0, "max_gradient_pct": 10.584140405815788, "diagnostic": false, "flags": [], "start_distance_m": 334.0, "end_distance_m": 434.0, "start_elevation_m": 687.3281550591335, "end_elevation_m": 697.9122954649492, "min_gradient_pct": -10.661814270093828 } ], "shape": { "ascent_concentration": 0.336, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 46.0, "shape_class": "sustained" }, "length_m": 7709.582514965652, "start_elevation_m": 657.6747306342457, "end_elevation_m": 1139.8512720742217, "endpoint_gain_m": 482.17654143997595, "overall_gradient_pct": 6.25424970164061, "accumulated_ascent_m": 517.9817041021903, "window_maxima": { "max_5m": { "gradient_pct": 18.854297283212418, "start_distance_m": 475.0, "end_distance_m": 480.0, "midpoint_distance_m": 477.5, "start_elevation_m": 700.5099445361868, "end_elevation_m": 701.4526594003474, "start_xy": [ 923444.6154154368, 6483040.702347894 ], "end_xy": [ 923444.5233393982, 6483035.710727404 ] }, "max_10m": { "gradient_pct": 15.357696495668733, "start_distance_m": 475.0, "end_distance_m": 485.0, "midpoint_distance_m": 480.0, "start_elevation_m": 700.5099445361868, "end_elevation_m": 702.0457141857537, "start_xy": [ 923444.6154154368, 6483040.702347894 ], "end_xy": [ 923444.3619200725, 6483030.713333703 ] }, "max_20m": { "gradient_pct": 13.58056423377434, "start_distance_m": 474.0, "end_distance_m": 494.0, "midpoint_distance_m": 484.0, "start_elevation_m": 700.4171327957804, "end_elevation_m": 703.1332456425353, "start_xy": [ 923444.4182974489, 6483041.682727667 ], "end_xy": [ 923441.8782198346, 6483022.169687365 ] }, "max_25m": { "gradient_pct": 13.31753996605994, "start_distance_m": 475.0, "end_distance_m": 500.0, "midpoint_distance_m": 487.5, "start_elevation_m": 700.5099445361868, "end_elevation_m": 703.8393295277018, "start_xy": [ 923444.6154154368, 6483040.702347894 ], "end_xy": [ 923438.1200326787, 6483017.55794934 ] }, "max_50m": { "gradient_pct": 11.377068144541454, "start_distance_m": 384.0, "end_distance_m": 434.0, "midpoint_distance_m": 409.0, "start_elevation_m": 692.2237613926785, "end_elevation_m": 697.9122954649492, "start_xy": [ 923398.8160934871, 6483116.20778703 ], "end_xy": [ 923432.5270012354, 6483079.590083101 ] }, "max_100m": { "gradient_pct": 10.584140405815788, "start_distance_m": 334.0, "end_distance_m": 434.0, "midpoint_distance_m": 384.0, "start_elevation_m": 687.3281550591335, "end_elevation_m": 697.9122954649492, "start_xy": [ 923369.7697957285, 6483156.537277858 ], "end_xy": [ 923432.5270012354, 6483079.590083101 ] } }, "window_minima": { "min_5m": { "gradient_pct": -69.41025373273987, "start_distance_m": 4665.0, "end_distance_m": 4670.0, "midpoint_distance_m": 4667.5, "start_elevation_m": 904.646933621699, "end_elevation_m": 901.176420935062, "start_xy": [ 923473.6409764341, 6479520.851248711 ], "end_xy": [ 923469.7756646591, 6479517.828607466 ] }, "min_10m": { "gradient_pct": -58.53953961232719, "start_distance_m": 4661.0, "end_distance_m": 4671.0, "midpoint_distance_m": 4666.0, "start_elevation_m": 906.8696134359279, "end_elevation_m": 901.0156594746952, "start_xy": [ 923475.6578798201, 6479524.305536009 ], "end_xy": [ 923468.931388827, 6479517.292698594 ] }, "min_20m": { "gradient_pct": -30.936930544320944, "start_distance_m": 4653.0, "end_distance_m": 4673.0, "midpoint_distance_m": 4663.0, "start_elevation_m": 907.0446702133737, "end_elevation_m": 900.8572841045095, "start_xy": [ 923478.9552093381, 6479531.547948862 ], "end_xy": [ 923467.2428371629, 6479516.220880849 ] }, "min_25m": { "gradient_pct": -25.407019571265664, "start_distance_m": 4648.0, "end_distance_m": 4673.0, "midpoint_distance_m": 4660.5, "start_elevation_m": 907.2090389973259, "end_elevation_m": 900.8572841045095, "start_xy": [ 923480.1531622913, 6479536.325257187 ], "end_xy": [ 923467.2428371629, 6479516.220880849 ] }, "min_50m": { "gradient_pct": -15.158735794569566, "start_distance_m": 4623.0, "end_distance_m": 4673.0, "midpoint_distance_m": 4648.0, "start_elevation_m": 908.4366520017943, "end_elevation_m": 900.8572841045095, "start_xy": [ 923475.6224752299, 6479560.8340792665 ], "end_xy": [ 923467.2428371629, 6479516.220880849 ] }, "min_100m": { "gradient_pct": -10.661814270093828, "start_distance_m": 4573.0, "end_distance_m": 4673.0, "midpoint_distance_m": 4623.0, "start_elevation_m": 911.5190983746033, "end_elevation_m": 900.8572841045095, "start_xy": [ 923448.5009068628, 6479602.14654206 ], "end_xy": [ 923467.2428371629, 6479516.220880849 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 26.97107371676566, "start_distance_m": 425.0, "end_distance_m": 427.0, "midpoint_distance_m": 426.0, "start_elevation_m": 696.736990659678, "end_elevation_m": 697.2764121340133, "start_xy": [ 923427.7634289775, 6483087.218033498 ], "end_xy": [ 923428.8725133595, 6483085.560402888 ] }, "max_3m": { "gradient_pct": 21.57317926742432, "start_distance_m": 425.0, "end_distance_m": 428.0, "midpoint_distance_m": 426.5, "start_elevation_m": 696.736990659678, "end_elevation_m": 697.3841860377007, "start_xy": [ 923427.7634289775, 6483087.218033498 ], "end_xy": [ 923429.394583056, 6483084.707500061 ] } }, "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": 0.011, "windows_resited": [ 2.0, 3.0, 5.0, 10.0, 20.0, 25.0, 50.0 ], "windows_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.112, "obstruction_max_height_m": 33.46, "flagged_windows_m": [] }, "excluded_ranges_m": [ [ 0.0, 29.0 ], [ 4657.0, 4687.0 ], [ 6729.0, 6750.0 ] ], "review": [], "extent": [ "may_start_earlier", "may_continue_beyond_end" ] }, "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_E921-N6477_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E921-N6478_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E922-N6477_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E922-N6478_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E922-N6479_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E922-N6480_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E922-N6483_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E923-N6479_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E923-N6480_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E923-N6481_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E923-N6482_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E923-N6483_0m5.tif" ], "calculated_at": "2026-09-17T03:20:16+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps2.osm.pbf", "osm_snapshot": "", "run_id": "fr-alps2", "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": [ "E921-N6477", "E921-N6478", "E922-N6477", "E922-N6478", "E922-N6479", "E922-N6480", "E922-N6483", "E923-N6479", "E923-N6480", "E923-N6481", "E923-N6482", "E923-N6483" ], "elevation_blocks": [ "21LHD6PL@2025-03-07", "21LHD6PM@2025-03-25" ], "ign_dalles": [ "LHD_FXX_0921_6478_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0921_6479_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0922_6478_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0922_6479_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0922_6480_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0922_6481_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0922_6484_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0923_6480_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0923_6481_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0923_6482_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0923_6483_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0923_6484_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD6PL", "21LHD6PM" ], "ign_editions": [ "2025-03-07", "2025-03-25" ], "ign_dsm_edition": { "LHD_FXX_0921_6478_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0921_6479_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0922_6478_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0922_6479_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0922_6480_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0922_6481_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0922_6484_MNT_O_0M50_LAMB93_IGN69": "2025-03-07", "LHD_FXX_0923_6480_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0923_6481_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0923_6482_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0923_6483_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0923_6484_MNT_O_0M50_LAMB93_IGN69": "2025-03-07" }, "climb_origin": "named-pass", "structure_own_ways": 23, "structure_mask_ranges_m": [ [ 4666.0, 4677.9 ], [ 6734.3, 6745.3 ], [ 0.0, 15.0 ] ], "mask_basin_extension_m": 9.0, "carriageway": { "stations": 313, "stations_resolved": 313, "width_median_m": 6.0, "width_p10_m": 4.05, "width_min_m": 1.0, "width_max_m": 12.0, "bounded_share": 0.371, "unbounded_share": 0.629, "confidence_median": 0.0, "width_median_bounded_m": 6.0, "window_m": [ 475.0, 500.0 ], "width_at_max25_m": 2.12, "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": 313, "stations_resolved": 313, "width_median_m": 7.25, "width_p10_m": 1.0, "width_min_m": 0.0, "width_max_m": 12.0, "bounded_share": 0.706, "unbounded_share": 0.294, "confidence_median": 1.0, "width_median_bounded_m": 6.5, "window_m": [ 475.0, 500.0 ], "width_at_max25_m": 4.0, "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": "Saint-Pierre-d'Entremont", "county": "Is\u00e8re", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }