{ "ocl_version": "0.1.0", "name": "Chemin de l'Octroi", "slug": "chemin-de-l-octroi", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 34.9285344169175, "diagnostic": true, "flags": [], "start_distance_m": 187.0, "end_distance_m": 189.0, "start_elevation_m": 1092.5417729284604, "end_elevation_m": 1093.2403436167988, "min_gradient_pct": -6.055315935827821 }, { "window_m": 3.0, "max_gradient_pct": 34.21085914606768, "diagnostic": true, "flags": [], "start_distance_m": 186.0, "end_distance_m": 189.0, "start_elevation_m": 1092.2140178424168, "end_elevation_m": 1093.2403436167988, "min_gradient_pct": -6.133396650337393 }, { "window_m": 5.0, "max_gradient_pct": 32.826915183318306, "diagnostic": false, "flags": [], "start_distance_m": 186.0, "end_distance_m": 191.0, "start_elevation_m": 1092.2140178424168, "end_elevation_m": 1093.8553636015827, "min_gradient_pct": -4.935242076367103 }, { "window_m": 10.0, "max_gradient_pct": 29.006946857862204, "diagnostic": false, "flags": [], "start_distance_m": 182.0, "end_distance_m": 192.0, "start_elevation_m": 1091.2515721122031, "end_elevation_m": 1094.1522667979893, "min_gradient_pct": -2.7661582622477 }, { "window_m": 20.0, "max_gradient_pct": 23.559007556394818, "diagnostic": false, "flags": [], "start_distance_m": 173.0, "end_distance_m": 193.0, "start_elevation_m": 1089.6635635157963, "end_elevation_m": 1094.3753650270753, "min_gradient_pct": -0.3210182828934194 }, { "window_m": 25.0, "max_gradient_pct": 21.708741939807624, "diagnostic": false, "flags": [], "start_distance_m": 168.0, "end_distance_m": 193.0, "start_elevation_m": 1088.9481795421234, "end_elevation_m": 1094.3753650270753, "min_gradient_pct": 0.8359897890268257 }, { "window_m": 50.0, "max_gradient_pct": 19.24654838372271, "diagnostic": false, "flags": [], "start_distance_m": 143.0, "end_distance_m": 193.0, "start_elevation_m": 1084.752090835214, "end_elevation_m": 1094.3753650270753, "min_gradient_pct": 4.0945243823575765 }, { "window_m": 100.0, "max_gradient_pct": 17.372731529125303, "diagnostic": false, "flags": [], "start_distance_m": 98.0, "end_distance_m": 198.0, "start_elevation_m": 1077.1571124130214, "end_elevation_m": 1094.5298439421467, "min_gradient_pct": 4.961785296208063 } ], "shape": { "ascent_concentration": 0.395, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 105.0, "shape_class": "sustained" }, "length_m": 364.58049354588934, "start_elevation_m": 1072.2466165918088, "end_elevation_m": 1113.8436996093756, "endpoint_gain_m": 41.597083017566774, "overall_gradient_pct": 11.409574498349016, "accumulated_ascent_m": 42.181193822972546, "window_maxima": { "max_5m": { "gradient_pct": 32.826915183318306, "start_distance_m": 186.0, "end_distance_m": 191.0, "midpoint_distance_m": 188.5, "start_elevation_m": 1092.2140178424168, "end_elevation_m": 1093.8553636015827, "start_xy": [ 978026.4334401352, 6487811.035438821 ], "end_xy": [ 978023.2702094957, 6487807.163281361 ] }, "max_10m": { "gradient_pct": 29.006946857862204, "start_distance_m": 182.0, "end_distance_m": 192.0, "midpoint_distance_m": 187.0, "start_elevation_m": 1091.2515721122031, "end_elevation_m": 1094.1522667979893, "start_xy": [ 978028.944546081, 6487814.149013443 ], "end_xy": [ 978022.6357419967, 6487806.39033182 ] }, "max_20m": { "gradient_pct": 23.559007556394818, "start_distance_m": 173.0, "end_distance_m": 193.0, "midpoint_distance_m": 183.0, "start_elevation_m": 1089.6635635157963, "end_elevation_m": 1094.3753650270753, "start_xy": [ 978034.5945344588, 6487821.154556343 ], "end_xy": [ 978022.0012744977, 6487805.617382279 ] }, "max_25m": { "gradient_pct": 21.708741939807624, "start_distance_m": 168.0, "end_distance_m": 193.0, "midpoint_distance_m": 180.5, "start_elevation_m": 1088.9481795421234, "end_elevation_m": 1094.3753650270753, "start_xy": [ 978037.733416891, 6487825.046524622 ], "end_xy": [ 978022.0012744977, 6487805.617382279 ] }, "max_50m": { "gradient_pct": 19.24654838372271, "start_distance_m": 143.0, "end_distance_m": 193.0, "midpoint_distance_m": 168.0, "start_elevation_m": 1084.752090835214, "end_elevation_m": 1094.3753650270753, "start_xy": [ 978056.6886097222, 6487841.057211273 ], "end_xy": [ 978022.0012744977, 6487805.617382279 ] }, "max_100m": { "gradient_pct": 17.372731529125303, "start_distance_m": 98.0, "end_distance_m": 198.0, "midpoint_distance_m": 148.0, "start_elevation_m": 1077.1571124130214, "end_elevation_m": 1094.5298439421467, "start_xy": [ 978068.0526978247, 6487876.254529675 ], "end_xy": [ 978018.809846959, 6487801.768710819 ] } }, "window_minima": { "min_5m": { "gradient_pct": -4.935242076367103, "start_distance_m": 295.0, "end_distance_m": 300.0, "midpoint_distance_m": 297.5, "start_elevation_m": 1107.5788485559415, "end_elevation_m": 1107.3320864521231, "start_xy": [ 978002.3606422215, 6487709.538886827 ], "end_xy": [ 978005.4909261123, 6487705.639999452 ] }, "min_10m": { "gradient_pct": -2.7661582622477, "start_distance_m": 291.0, "end_distance_m": 301.0, "midpoint_distance_m": 296.0, "start_elevation_m": 1107.5980611134742, "end_elevation_m": 1107.3214452872494, "start_xy": [ 978000.1450694291, 6487712.684772779 ], "end_xy": [ 978005.895145906, 6487704.879173303 ] }, "min_20m": { "gradient_pct": -0.3210182828934194, "start_distance_m": 14.0, "end_distance_m": 34.0, "midpoint_distance_m": 24.0, "start_elevation_m": 1074.1778731409877, "end_elevation_m": 1074.113669484409, "start_xy": [ 978131.4852971807, 6487856.60274259 ], "end_xy": [ 978115.0033617058, 6487866.437227193 ] }, "min_25m": { "gradient_pct": 0.8359897890268257, "start_distance_m": 14.0, "end_distance_m": 39.0, "midpoint_distance_m": 26.5, "start_elevation_m": 1074.1778731409877, "end_elevation_m": 1074.3868705882444, "start_xy": [ 978131.4852971807, 6487856.60274259 ], "end_xy": [ 978110.0110548241, 6487866.712964934 ] }, "min_50m": { "gradient_pct": 4.0945243823575765, "start_distance_m": 50.0, "end_distance_m": 100.0, "midpoint_distance_m": 75.0, "start_elevation_m": 1075.2966839072244, "end_elevation_m": 1077.3439460984032, "start_xy": [ 978099.0274375541, 6487867.313091308 ], "end_xy": [ 978069.0282186598, 6487874.508574606 ] }, "min_100m": { "gradient_pct": 4.961785296208063, "start_distance_m": 5.0, "end_distance_m": 105.0, "midpoint_distance_m": 55.0, "start_elevation_m": 1073.220846858254, "end_elevation_m": 1078.182632154462, "start_xy": [ 978137.841181392, 6487853.460720191 ], "end_xy": [ 978071.4670207477, 6487870.143686936 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 34.9285344169175, "start_distance_m": 187.0, "end_distance_m": 189.0, "midpoint_distance_m": 188.0, "start_elevation_m": 1092.5417729284604, "end_elevation_m": 1093.2403436167988, "start_xy": [ 978025.8056636488, 6487810.257045165 ], "end_xy": [ 978024.5391444936, 6487808.709180443 ] }, "max_3m": { "gradient_pct": 34.21085914606768, "start_distance_m": 186.0, "end_distance_m": 189.0, "midpoint_distance_m": 187.5, "start_elevation_m": 1092.2140178424168, "end_elevation_m": 1093.2403436167988, "start_xy": [ 978026.4334401352, 6487811.035438821 ], "end_xy": [ 978024.5391444936, 6487808.709180443 ] } }, "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": { "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.098, "obstruction_max_height_m": 8.62, "flagged_windows_m": [] }, "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_E977-N6487_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E978-N6487_0m5.tif" ], "calculated_at": "2026-09-17T01:56:43+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": [ "E977-N6487", "E978-N6487" ], "elevation_blocks": [ "21LHD5QL2@2025-03-26" ], "ign_dalles": [ "LHD_FXX_0977_6488_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0978_6488_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD5QL2" ], "ign_editions": [ "2025-03-26" ], "ign_dsm_edition": { "LHD_FXX_0977_6488_MNT_O_0M50_LAMB93_IGN69": "2025-03-26", "LHD_FXX_0978_6488_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": 21, "stations_resolved": 21, "width_median_m": 6.25, "width_p10_m": 3.75, "width_min_m": 2.5, "width_max_m": 12.0, "bounded_share": 0.095, "unbounded_share": 0.905, "confidence_median": 0.0, "width_median_bounded_m": 4.5, "window_m": [ 168.0, 193.0 ], "width_at_max25_m": 4.25, "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": 21, "stations_resolved": 21, "width_median_m": 3.5, "width_p10_m": 1.25, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.667, "unbounded_share": 0.333, "confidence_median": 1.0, "width_median_bounded_m": 2.12, "window_m": [ 168.0, 193.0 ], "width_at_max25_m": 3.0, "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": "Les Allues", "county": "Savoie", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }