{ "ocl_version": "0.1.0", "name": "Route du Chenavier", "slug": "route-du-chenavier", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 20.478905527699, "diagnostic": true, "flags": [ "structure_excluded", "texture_excluded", "texture_excluded", "canopy_or_structure" ], "start_distance_m": 3590.0, "end_distance_m": 3592.0, "start_elevation_m": 834.5631175906465, "end_elevation_m": 834.9726957012005, "min_gradient_pct": -11.956339966178575, "suppressed_max_gradient_pct": 106.75325653331811, "suppressed_location_m": [ 0.0, 2.0 ] }, { "window_m": 3.0, "max_gradient_pct": 17.04893693664644, "diagnostic": true, "flags": [ "structure_excluded", "texture_excluded", "texture_excluded", "canopy_or_structure" ], "start_distance_m": 3589.0, "end_distance_m": 3592.0, "start_elevation_m": 834.4612275931011, "end_elevation_m": 834.9726957012005, "min_gradient_pct": -11.635520202529884, "suppressed_max_gradient_pct": 74.99439224440039, "suppressed_location_m": [ 0.0, 3.0 ] }, { "window_m": 5.0, "max_gradient_pct": 12.675474510444928, "diagnostic": false, "flags": [ "structure_excluded", "texture_excluded", "texture_excluded", "canopy_or_structure" ], "start_distance_m": 3588.0, "end_distance_m": 3593.0, "start_elevation_m": 834.3996154746568, "end_elevation_m": 835.033389200179, "min_gradient_pct": -11.268395155686903, "suppressed_max_gradient_pct": 47.15871145464462, "suppressed_location_m": [ 0.0, 5.0 ] }, { "window_m": 10.0, "max_gradient_pct": 12.211701853705108, "diagnostic": false, "flags": [ "texture_excluded", "texture_excluded" ], "start_distance_m": 1316.0, "end_distance_m": 1326.0, "start_elevation_m": 654.4753381664989, "end_elevation_m": 655.6965083518694, "min_gradient_pct": -10.604484643889691, "suppressed_max_gradient_pct": 28.4593673009158, "suppressed_location_m": [ 5988.0, 5998.0 ] }, { "window_m": 20.0, "max_gradient_pct": 11.861695468143125, "diagnostic": false, "flags": [ "texture_excluded", "texture_excluded" ], "start_distance_m": 1311.0, "end_distance_m": 1331.0, "start_elevation_m": 653.8934505890453, "end_elevation_m": 656.2657896826739, "min_gradient_pct": -9.773864410279316, "suppressed_max_gradient_pct": 24.437911371258565, "suppressed_location_m": [ 5978.0, 5998.0 ] }, { "window_m": 25.0, "max_gradient_pct": 11.82654919690458, "diagnostic": false, "flags": [ "texture_excluded", "texture_excluded" ], "start_distance_m": 1307.0, "end_distance_m": 1332.0, "start_elevation_m": 653.4433693477273, "end_elevation_m": 656.4000066469534, "min_gradient_pct": -9.489957537694409, "suppressed_max_gradient_pct": 22.280430770676958, "suppressed_location_m": [ 5973.0, 5998.0 ] }, { "window_m": 50.0, "max_gradient_pct": 11.140086041509676, "diagnostic": false, "flags": [ "texture_excluded" ], "start_distance_m": 1289.0, "end_distance_m": 1339.0, "start_elevation_m": 651.5821188817304, "end_elevation_m": 657.1521619024852, "min_gradient_pct": -8.32301225210108, "suppressed_max_gradient_pct": 20.240110758072433, "suppressed_location_m": [ 5948.0, 5998.0 ] }, { "window_m": 100.0, "max_gradient_pct": 10.541036684301957, "diagnostic": false, "flags": [ "texture_excluded" ], "start_distance_m": 1256.0, "end_distance_m": 1356.0, "start_elevation_m": 648.2479236990943, "end_elevation_m": 658.7889603833962, "min_gradient_pct": -1.034859227605466, "suppressed_max_gradient_pct": 13.568227673190677, "suppressed_location_m": [ 5946.0, 6046.0 ] } ], "shape": { "ascent_concentration": 0.287, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 62.0, "shape_class": "sustained" }, "length_m": 8585.345871441863, "start_elevation_m": 536.7202898432128, "end_elevation_m": 1187.960845863274, "endpoint_gain_m": 651.2405560200613, "overall_gradient_pct": 7.585490040492555, "accumulated_ascent_m": 655.9163742314697, "window_maxima": { "max_5m": { "gradient_pct": 12.675474510444928, "start_distance_m": 3588.0, "end_distance_m": 3593.0, "midpoint_distance_m": 3590.5, "start_elevation_m": 834.3996154746568, "end_elevation_m": 835.033389200179, "start_xy": [ 971993.7920327896, 6498322.825800084 ], "end_xy": [ 971993.2950567832, 6498327.480195924 ] }, "max_10m": { "gradient_pct": 12.211701853705108, "start_distance_m": 1316.0, "end_distance_m": 1326.0, "midpoint_distance_m": 1321.0, "start_elevation_m": 654.4753381664989, "end_elevation_m": 655.6965083518694, "start_xy": [ 972213.3725643317, 6497965.913932293 ], "end_xy": [ 972203.5700346753, 6497964.165156666 ] }, "max_20m": { "gradient_pct": 11.861695468143125, "start_distance_m": 1311.0, "end_distance_m": 1331.0, "midpoint_distance_m": 1321.0, "start_elevation_m": 653.8934505890453, "end_elevation_m": 656.2657896826739, "start_xy": [ 972217.9861039576, 6497967.841431221 ], "end_xy": [ 972198.6057191272, 6497964.472195536 ] }, "max_25m": { "gradient_pct": 11.82654919690458, "start_distance_m": 1307.0, "end_distance_m": 1332.0, "midpoint_distance_m": 1319.5, "start_elevation_m": 653.4433693477273, "end_elevation_m": 656.4000066469534, "start_xy": [ 972221.643988454, 6497969.458599514 ], "end_xy": [ 972197.61723271, 6497964.623505162 ] }, "max_50m": { "gradient_pct": 11.140086041509676, "start_distance_m": 1289.0, "end_distance_m": 1339.0, "midpoint_distance_m": 1314.0, "start_elevation_m": 651.5821188817304, "end_elevation_m": 657.1521619024852, "start_xy": [ 972238.0914141473, 6497976.753803481 ], "end_xy": [ 972190.9529850769, 6497966.765286015 ] }, "max_100m": { "gradient_pct": 10.541036684301957, "start_distance_m": 1256.0, "end_distance_m": 1356.0, "midpoint_distance_m": 1306.0, "start_elevation_m": 648.2479236990943, "end_elevation_m": 658.7889603833962, "start_xy": [ 972269.8839590345, 6497985.429136515 ], "end_xy": [ 972174.1486881333, 6497967.075628817 ] } }, "window_minima": { "min_5m": { "gradient_pct": -11.268395155686903, "start_distance_m": 5901.0, "end_distance_m": 5906.0, "midpoint_distance_m": 5903.5, "start_elevation_m": 995.8426563301235, "end_elevation_m": 995.2792365723392, "start_xy": [ 972619.5871533973, 6499354.048164046 ], "end_xy": [ 972622.4767688344, 6499358.128620225 ] }, "min_10m": { "gradient_pct": -10.604484643889691, "start_distance_m": 5901.0, "end_distance_m": 5911.0, "midpoint_distance_m": 5906.0, "start_elevation_m": 995.8426563301235, "end_elevation_m": 994.7822078657346, "start_xy": [ 972619.5871533973, 6499354.048164046 ], "end_xy": [ 972625.3663842716, 6499362.209076404 ] }, "min_20m": { "gradient_pct": -9.773864410279316, "start_distance_m": 5901.0, "end_distance_m": 5921.0, "midpoint_distance_m": 5911.0, "start_elevation_m": 995.8426563301235, "end_elevation_m": 993.8878834480677, "start_xy": [ 972619.5871533973, 6499354.048164046 ], "end_xy": [ 972631.145615146, 6499370.36998876 ] }, "min_25m": { "gradient_pct": -9.489957537694409, "start_distance_m": 5901.0, "end_distance_m": 5926.0, "midpoint_distance_m": 5913.5, "start_elevation_m": 995.8426563301235, "end_elevation_m": 993.4701669456999, "start_xy": [ 972619.5871533973, 6499354.048164046 ], "end_xy": [ 972634.0293842267, 6499374.454483079 ] }, "min_50m": { "gradient_pct": -8.32301225210108, "start_distance_m": 5895.0, "end_distance_m": 5945.0, "midpoint_distance_m": 5920.0, "start_elevation_m": 996.2081615708051, "end_elevation_m": 992.0466554447546, "start_xy": [ 972616.1196148726, 6499349.151616632 ], "end_xy": [ 972642.8760470123, 6499390.953921131 ] }, "min_100m": { "gradient_pct": -1.034859227605466, "start_distance_m": 5846.0, "end_distance_m": 5946.0, "midpoint_distance_m": 5896.0, "start_elevation_m": 993.1036137543135, "end_elevation_m": 992.0687545267081, "start_xy": [ 972588.8946200755, 6499311.673668638 ], "end_xy": [ 972642.8261969063, 6499391.937878147 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 20.478905527699, "start_distance_m": 3590.0, "end_distance_m": 3592.0, "midpoint_distance_m": 3591.0, "start_elevation_m": 834.5631175906465, "end_elevation_m": 834.9726957012005, "start_xy": [ 971992.820193186, 6498324.5738068875 ], "end_xy": [ 971993.0814954176, 6498326.503266273 ] }, "max_3m": { "gradient_pct": 17.04893693664644, "start_distance_m": 3589.0, "end_distance_m": 3592.0, "midpoint_distance_m": 3590.5, "start_elevation_m": 834.4612275931011, "end_elevation_m": 834.9726957012005, "start_xy": [ 971993.3061129878, 6498323.699803486 ], "end_xy": [ 971993.0814954176, 6498326.503266273 ] } }, "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": 0.001, "windows_resited": [ 2.0, 3.0, 5.0 ], "windows_unresolved": [] }, "texture_suppression": { "masked_fraction": 0.007, "windows_resited": [ 2.0, 3.0, 5.0, 10.0, 20.0, 25.0 ], "windows_unresolved": [] }, "texture_windows": { "rounds": 2, "windows_masked": [ { "window_m": 25.0, "start_m": 5973.0, "end_m": 5998.0, "raw_pct": 22.28, "reason": "hump" }, { "window_m": 20.0, "start_m": 5978.0, "end_m": 5998.0, "raw_pct": 24.44, "reason": "hump" }, { "window_m": 10.0, "start_m": 5988.0, "end_m": 5998.0, "raw_pct": 28.46, "reason": "hump" }, { "window_m": 5.0, "start_m": 5993.0, "end_m": 5998.0, "raw_pct": 33.71, "reason": "hump" }, { "window_m": 25.0, "start_m": 5945.0, "end_m": 5970.0, "raw_pct": 18.02, "reason": "hump" }, { "window_m": 20.0, "start_m": 5946.0, "end_m": 5966.0, "raw_pct": 20.84, "reason": "hump" }, { "window_m": 10.0, "start_m": 5950.0, "end_m": 5960.0, "raw_pct": 25.25, "reason": "hump" } ], "advisory": [], "unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.055, "obstruction_max_height_m": 19.76, "flagged_windows_m": [ 2, 3, 5 ] }, "excluded_ranges_m": [ [ 0.0, 4.0 ], [ 5943.0, 6000.0 ] ], "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_E971-N6497_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E971-N6498_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E972-N6497_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E972-N6498_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E972-N6499_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E972-N6500_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E973-N6499_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E973-N6500_0m5.tif" ], "calculated_at": "2026-09-17T01:53:08+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": [ "E971-N6497", "E971-N6498", "E972-N6497", "E972-N6498", "E972-N6499", "E972-N6500", "E973-N6499", "E973-N6500" ], "elevation_blocks": [ "21LHD5QL2@2025-03-26" ], "ign_dalles": [ "LHD_FXX_0971_6498_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0971_6499_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0972_6498_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0972_6499_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0972_6500_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0972_6501_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0973_6500_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0973_6501_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD5QL2" ], "ign_editions": [ "2025-03-26" ], "ign_dsm_edition": { "LHD_FXX_0971_6498_MNT_O_0M50_LAMB93_IGN69": "2025-03-26", "LHD_FXX_0971_6499_MNT_O_0M50_LAMB93_IGN69": "2025-03-26", "LHD_FXX_0972_6498_MNT_O_0M50_LAMB93_IGN69": "2025-03-26", "LHD_FXX_0972_6499_MNT_O_0M50_LAMB93_IGN69": "2025-03-26", "LHD_FXX_0972_6500_MNT_O_0M50_LAMB93_IGN69": "2025-03-26", "LHD_FXX_0972_6501_MNT_O_0M50_LAMB93_IGN69": "2025-03-26", "LHD_FXX_0973_6500_MNT_O_0M50_LAMB93_IGN69": "2025-03-26", "LHD_FXX_0973_6501_MNT_O_0M50_LAMB93_IGN69": "2025-03-26" }, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 350, "stations_resolved": 350, "width_median_m": 6.5, "width_p10_m": 4.25, "width_min_m": 1.0, "width_max_m": 11.0, "bounded_share": 0.7, "unbounded_share": 0.3, "confidence_median": 0.931, "width_median_bounded_m": 6.25, "window_m": [ 1307.0, 1332.0 ], "width_at_max25_m": 7.5, "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": 350, "stations_resolved": 350, "width_median_m": 7.0, "width_p10_m": 1.5, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.869, "unbounded_share": 0.131, "confidence_median": 1.0, "width_median_bounded_m": 6.75, "window_m": [ 1307.0, 1332.0 ], "width_at_max25_m": 8.25, "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": "La L\u00e9ch\u00e8re", "county": "Savoie", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }