{ "ocl_version": "0.1.0", "name": "Col d'Albanne from Montricher", "slug": "col-d-albanne-from-montricher", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 29.1507056334126, "diagnostic": true, "flags": [ "structure_excluded", "placement_excluded", "canopy_or_structure" ], "start_distance_m": 1742.0, "end_distance_m": 1744.0, "start_elevation_m": 1417.7037043025603, "end_elevation_m": 1418.2867184152285, "min_gradient_pct": -62.48409369758292, "suppressed_max_gradient_pct": 101.49643616033472, "suppressed_location_m": [ 1753.0, 1755.0 ] }, { "window_m": 3.0, "max_gradient_pct": 21.99396566190141, "diagnostic": true, "flags": [ "structure_excluded", "placement_excluded", "canopy_or_structure" ], "start_distance_m": 1741.0, "end_distance_m": 1744.0, "start_elevation_m": 1417.6268994453715, "end_elevation_m": 1418.2867184152285, "min_gradient_pct": -57.63456688058189, "suppressed_max_gradient_pct": 92.27427930480492, "suppressed_location_m": [ 1752.0, 1755.0 ] }, { "window_m": 5.0, "max_gradient_pct": 14.897666249735266, "diagnostic": false, "flags": [ "structure_excluded", "placement_excluded", "texture_excluded", "canopy_or_structure" ], "start_distance_m": 1739.0, "end_distance_m": 1744.0, "start_elevation_m": 1417.5418351027417, "end_elevation_m": 1418.2867184152285, "min_gradient_pct": -39.2142409683629, "suppressed_max_gradient_pct": 74.29714359356694, "suppressed_location_m": [ 1751.0, 1756.0 ] }, { "window_m": 10.0, "max_gradient_pct": 12.754014619326881, "diagnostic": false, "flags": [ "structure_excluded", "texture_excluded", "canopy_or_structure" ], "start_distance_m": 3245.0, "end_distance_m": 3255.0, "start_elevation_m": 1534.811196444753, "end_elevation_m": 1536.0865979066857, "min_gradient_pct": -8.055403333228242, "suppressed_max_gradient_pct": 41.701406936135754, "suppressed_location_m": [ 1747.0, 1757.0 ] }, { "window_m": 20.0, "max_gradient_pct": 12.517579725795258, "diagnostic": false, "flags": [ "structure_excluded", "texture_excluded" ], "start_distance_m": 4532.0, "end_distance_m": 4552.0, "start_elevation_m": 1637.8976964121707, "end_elevation_m": 1640.4012123573298, "min_gradient_pct": -3.7840398614571313, "suppressed_max_gradient_pct": 23.34034712336461, "suppressed_location_m": [ 1737.0, 1757.0 ] }, { "window_m": 25.0, "max_gradient_pct": 12.350214899549428, "diagnostic": false, "flags": [ "structure_excluded", "texture_excluded" ], "start_distance_m": 4528.0, "end_distance_m": 4553.0, "start_elevation_m": 1637.4213725989468, "end_elevation_m": 1640.5089263238342, "min_gradient_pct": -2.1164565404569657, "suppressed_max_gradient_pct": 19.854471003516664, "suppressed_location_m": [ 1732.0, 1757.0 ] }, { "window_m": 50.0, "max_gradient_pct": 11.626871064203442, "diagnostic": false, "flags": [ "structure_excluded" ], "start_distance_m": 4512.0, "end_distance_m": 4562.0, "start_elevation_m": 1635.7051712045804, "end_elevation_m": 1641.5186067366822, "min_gradient_pct": 0.08801783081935355, "suppressed_max_gradient_pct": 13.023978207328128, "suppressed_location_m": [ 1707.0, 1757.0 ] }, { "window_m": 100.0, "max_gradient_pct": 10.645418161116822, "diagnostic": false, "flags": [], "start_distance_m": 4483.0, "end_distance_m": 4583.0, "start_elevation_m": 1633.0218821206802, "end_elevation_m": 1643.667300281797, "min_gradient_pct": 1.8185692447550537 } ], "shape": { "ascent_concentration": 0.282, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 60.0, "shape_class": "sustained" }, "length_m": 4830.548161512564, "start_elevation_m": 1292.8437526035425, "end_elevation_m": 1653.317255996077, "endpoint_gain_m": 360.47350339253444, "overall_gradient_pct": 7.462372619832474, "accumulated_ascent_m": 369.0922967154886, "window_maxima": { "max_5m": { "gradient_pct": 14.897666249735266, "start_distance_m": 1739.0, "end_distance_m": 1744.0, "midpoint_distance_m": 1741.5, "start_elevation_m": 1417.5418351027417, "end_elevation_m": 1418.2867184152285, "start_xy": [ 968665.5975044314, 6464197.2839463325 ], "end_xy": [ 968663.380649318, 6464192.839261547 ] }, "max_10m": { "gradient_pct": 12.754014619326881, "start_distance_m": 3245.0, "end_distance_m": 3255.0, "midpoint_distance_m": 3250.0, "start_elevation_m": 1534.811196444753, "end_elevation_m": 1536.0865979066857, "start_xy": [ 968781.3684377718, 6463977.560167286 ], "end_xy": [ 968777.022605704, 6463968.553850411 ] }, "max_20m": { "gradient_pct": 12.517579725795258, "start_distance_m": 4532.0, "end_distance_m": 4552.0, "midpoint_distance_m": 4542.0, "start_elevation_m": 1637.8976964121707, "end_elevation_m": 1640.4012123573298, "start_xy": [ 968654.035894653, 6463067.845208101 ], "end_xy": [ 968635.7305630705, 6463060.55794902 ] }, "max_25m": { "gradient_pct": 12.350214899549428, "start_distance_m": 4528.0, "end_distance_m": 4553.0, "midpoint_distance_m": 4540.5, "start_elevation_m": 1637.4213725989468, "end_elevation_m": 1640.5089263238342, "start_xy": [ 968656.8539718076, 6463070.6421161825 ], "end_xy": [ 968634.7334151104, 6463060.482477531 ] }, "max_50m": { "gradient_pct": 11.626871064203442, "start_distance_m": 4512.0, "end_distance_m": 4562.0, "midpoint_distance_m": 4537.0, "start_elevation_m": 1635.7051712045804, "end_elevation_m": 1641.5186067366822, "start_xy": [ 968664.104385254, 6463084.782858296 ], "end_xy": [ 968625.7590834697, 6463059.803234126 ] }, "max_100m": { "gradient_pct": 10.645418161116822, "start_distance_m": 4483.0, "end_distance_m": 4583.0, "midpoint_distance_m": 4533.0, "start_elevation_m": 1633.0218821206802, "end_elevation_m": 1643.667300281797, "start_xy": [ 968671.0157609796, 6463112.929764206 ], "end_xy": [ 968604.9271697985, 6463057.448187583 ] } }, "window_minima": { "min_5m": { "gradient_pct": -39.2142409683629, "start_distance_m": 1757.0, "end_distance_m": 1762.0, "midpoint_distance_m": 1759.5, "start_elevation_m": 1422.0991722068386, "end_elevation_m": 1420.1384601584205, "start_xy": [ 968651.689530724, 6464187.400873808 ], "end_xy": [ 968646.695932773, 6464187.1479321085 ] }, "min_10m": { "gradient_pct": -8.055403333228242, "start_distance_m": 1792.0, "end_distance_m": 1802.0, "midpoint_distance_m": 1797.0, "start_elevation_m": 1422.6221601696147, "end_elevation_m": 1421.816619836292, "start_xy": [ 968616.7343450667, 6464185.630281911 ], "end_xy": [ 968606.7471491646, 6464185.124398512 ] }, "min_20m": { "gradient_pct": -3.7840398614571313, "start_distance_m": 1767.0, "end_distance_m": 1787.0, "midpoint_distance_m": 1777.0, "start_elevation_m": 1422.451090260653, "end_elevation_m": 1421.6942822883616, "start_xy": [ 968641.7023348219, 6464186.894990409 ], "end_xy": [ 968621.7279430177, 6464185.883223611 ] }, "min_25m": { "gradient_pct": -2.1164565404569657, "start_distance_m": 1779.0, "end_distance_m": 1804.0, "midpoint_distance_m": 1791.5, "start_elevation_m": 1422.504793593456, "end_elevation_m": 1421.9756794583418, "start_xy": [ 968629.7176997394, 6464186.28793033 ], "end_xy": [ 968604.7497099842, 6464185.023221833 ] }, "min_50m": { "gradient_pct": 0.08801783081935355, "start_distance_m": 1757.0, "end_distance_m": 1807.0, "midpoint_distance_m": 1782.0, "start_elevation_m": 1422.0991722068386, "end_elevation_m": 1422.1431811222483, "start_xy": [ 968651.689530724, 6464187.400873808 ], "end_xy": [ 968601.7535512135, 6464184.871456813 ] }, "min_100m": { "gradient_pct": 1.8185692447550537, "start_distance_m": 4730.0, "end_distance_m": 4830.0, "midpoint_distance_m": 4780.0, "start_elevation_m": 1651.5098945716497, "end_elevation_m": 1653.3284638164048, "start_xy": [ 968526.6577453185, 6462937.857433847 ], "end_xy": [ 968539.2201874574, 6462840.792067212 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 29.1507056334126, "start_distance_m": 1742.0, "end_distance_m": 1744.0, "midpoint_distance_m": 1743.0, "start_elevation_m": 1417.7037043025603, "end_elevation_m": 1418.2867184152285, "start_xy": [ 968664.3135104419, 6464194.5726072835 ], "end_xy": [ 968663.380649318, 6464192.839261547 ] }, "max_3m": { "gradient_pct": 21.99396566190141, "start_distance_m": 1741.0, "end_distance_m": 1744.0, "midpoint_distance_m": 1742.5, "start_elevation_m": 1417.6268994453715, "end_elevation_m": 1418.2867184152285, "start_xy": [ 968664.7415084384, 6464195.476386966 ], "end_xy": [ 968663.380649318, 6464192.839261547 ] } }, "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": 0.01, "windows_resited": [ 2.0, 3.0, 5.0, 10.0, 20.0, 25.0, 50.0 ], "windows_unresolved": [] }, "placement_suppression": { "masked_fraction": 0.016, "windows_resited": [ 2.0, 3.0, 5.0 ], "windows_unresolved": [] }, "texture_suppression": { "masked_fraction": 0.021, "windows_resited": [ 5.0, 10.0, 20.0, 25.0 ], "windows_unresolved": [] }, "texture_windows": { "rounds": 1, "windows_masked": [ { "window_m": 20.0, "start_m": 3117.0, "end_m": 3137.0, "raw_pct": 16.09, "reason": "hump" } ], "advisory": [], "unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.156, "obstruction_max_height_m": 33.09, "flagged_windows_m": [ 2, 3, 5, 10 ] }, "excluded_ranges_m": [ [ 551.0, 576.0 ], [ 1749.0, 1800.0 ], [ 3115.0, 3139.0 ] ], "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_E967-N6464_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E968-N6462_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E968-N6463_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E968-N6464_0m5.tif" ], "calculated_at": "2026-09-17T03:56:54+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps3.osm.pbf", "osm_snapshot": "", "run_id": "fr-alps3", "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": [ "E967-N6464", "E968-N6462", "E968-N6463", "E968-N6464" ], "elevation_blocks": [ "21LHD6QM@2025-02-20" ], "ign_dalles": [ "LHD_FXX_0967_6465_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0968_6463_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0968_6464_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0968_6465_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD6QM" ], "ign_editions": [ "2025-02-20" ], "ign_dsm_edition": { "LHD_FXX_0967_6465_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0968_6463_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0968_6464_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0968_6465_MNT_O_0M50_LAMB93_IGN69": "2025-02-20" }, "climb_origin": "named-pass", "structure_own_ways": 17, "structure_mask_ranges_m": [ [ 556.1, 571.4 ] ], "carriageway": { "stations": 200, "stations_resolved": 200, "width_median_m": 7.12, "width_p10_m": 4.48, "width_min_m": 1.0, "width_max_m": 11.75, "bounded_share": 0.43, "unbounded_share": 0.57, "confidence_median": 0.0, "width_median_bounded_m": 7.0, "window_m": [ 4528.0, 4553.0 ], "width_at_max25_m": 7.0, "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": 200, "stations_resolved": 200, "width_median_m": 6.88, "width_p10_m": 1.0, "width_min_m": 0.0, "width_max_m": 12.0, "bounded_share": 0.67, "unbounded_share": 0.33, "confidence_median": 1.0, "width_median_bounded_m": 4.25, "window_m": [ 4528.0, 4553.0 ], "width_at_max25_m": 10.0, "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": "Montricher-Albanne", "county": "Savoie", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }