{ "ocl_version": "0.1.0", "name": "Chemin de Font Taboureno", "slug": "chemin-de-font-taboureno", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 34.651116479405175, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 416.0, "end_distance_m": 418.0, "start_elevation_m": 246.00085510839395, "end_elevation_m": 246.69387743798205, "min_gradient_pct": -35.820688499208586 }, { "window_m": 3.0, "max_gradient_pct": 31.656974168693825, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 402.0, "end_distance_m": 405.0, "start_elevation_m": 242.57269625865013, "end_elevation_m": 243.52240548371094, "min_gradient_pct": -36.36951077851052 }, { "window_m": 5.0, "max_gradient_pct": 31.291184927131894, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 402.0, "end_distance_m": 407.0, "start_elevation_m": 242.57269625865013, "end_elevation_m": 244.13725550500672, "min_gradient_pct": -28.740323783991357 }, { "window_m": 10.0, "max_gradient_pct": 28.17574824579026, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 397.0, "end_distance_m": 407.0, "start_elevation_m": 241.3196806804277, "end_elevation_m": 244.13725550500672, "min_gradient_pct": -17.64552307114883 }, { "window_m": 20.0, "max_gradient_pct": 26.30567717219037, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 391.0, "end_distance_m": 411.0, "start_elevation_m": 239.83308481697412, "end_elevation_m": 245.0942202514122, "min_gradient_pct": -9.785872834389835 }, { "window_m": 25.0, "max_gradient_pct": 25.506935487651617, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 393.0, "end_distance_m": 418.0, "start_elevation_m": 240.31714356606915, "end_elevation_m": 246.69387743798205, "min_gradient_pct": -10.235043467187893 }, { "window_m": 50.0, "max_gradient_pct": 22.79692684069124, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 370.0, "end_distance_m": 420.0, "start_elevation_m": 235.7690149208361, "end_elevation_m": 247.16747834118172, "min_gradient_pct": -2.244797272200344 }, { "window_m": 100.0, "max_gradient_pct": 19.202629544252034, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 326.0, "end_distance_m": 426.0, "start_elevation_m": 228.68970135408182, "end_elevation_m": 247.89233089833385, "min_gradient_pct": 2.185750260664321 } ], "shape": { "ascent_concentration": 0.448, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 116.0, "shape_class": "sustained" }, "length_m": 487.09999999969165, "start_elevation_m": 207.46405132354099, "end_elevation_m": 254.20692968724163, "endpoint_gain_m": 46.74287836370064, "overall_gradient_pct": 9.596156510722691, "accumulated_ascent_m": 50.31010042011803, "window_maxima": { "max_5m": { "gradient_pct": 31.291184927131894, "start_distance_m": 402.0, "end_distance_m": 407.0, "midpoint_distance_m": 404.5, "start_elevation_m": 242.57269625865013, "end_elevation_m": 244.13725550500672, "start_xy": [ 1005988.677587925, 6285872.413356635 ], "end_xy": [ 1005993.0289313556, 6285869.950470046 ] }, "max_10m": { "gradient_pct": 28.17574824579026, "start_distance_m": 397.0, "end_distance_m": 407.0, "midpoint_distance_m": 402.0, "start_elevation_m": 241.3196806804277, "end_elevation_m": 244.13725550500672, "start_xy": [ 1005984.3262444945, 6285874.876243223 ], "end_xy": [ 1005993.0289313556, 6285869.950470046 ] }, "max_20m": { "gradient_pct": 26.30567717219037, "start_distance_m": 391.0, "end_distance_m": 411.0, "midpoint_distance_m": 401.0, "start_elevation_m": 239.83308481697412, "end_elevation_m": 245.0942202514122, "start_xy": [ 1005981.0723331689, 6285879.7915308215 ], "end_xy": [ 1005996.5100060999, 6285867.980160775 ] }, "max_25m": { "gradient_pct": 25.506935487651617, "start_distance_m": 393.0, "end_distance_m": 418.0, "midpoint_distance_m": 405.5, "start_elevation_m": 240.31714356606915, "end_elevation_m": 246.69387743798205, "start_xy": [ 1005982.0504982127, 6285878.0470557865 ], "end_xy": [ 1006003.1560530725, 6285865.938129641 ] }, "max_50m": { "gradient_pct": 22.79692684069124, "start_distance_m": 370.0, "end_distance_m": 420.0, "midpoint_distance_m": 395.0, "start_elevation_m": 235.7690149208361, "end_elevation_m": 247.16747834118172, "start_xy": [ 1005979.2513044652, 6285899.587975051 ], "end_xy": [ 1006005.1006890507, 6285865.4708065055 ] }, "max_100m": { "gradient_pct": 19.202629544252034, "start_distance_m": 326.0, "end_distance_m": 426.0, "midpoint_distance_m": 376.0, "start_elevation_m": 228.68970135408182, "end_elevation_m": 247.89233089833385, "start_xy": [ 1006000.9284859948, 6285934.354782328 ], "end_xy": [ 1006010.9345969853, 6285864.068837102 ] } }, "window_minima": { "min_5m": { "gradient_pct": -28.740323783991357, "start_distance_m": 194.0, "end_distance_m": 199.0, "midpoint_distance_m": 196.5, "start_elevation_m": 219.42637128065277, "end_elevation_m": 217.9893550914532, "start_xy": [ 1005905.0573072325, 6285898.862999965 ], "end_xy": [ 1005907.233655213, 6285903.364500768 ] }, "min_10m": { "gradient_pct": -17.64552307114883, "start_distance_m": 193.0, "end_distance_m": 203.0, "midpoint_distance_m": 198.0, "start_elevation_m": 219.55836373438515, "end_elevation_m": 217.79381142727027, "start_xy": [ 1005904.6220376365, 6285897.962699805 ], "end_xy": [ 1005908.9747335974, 6285906.965701409 ] }, "min_20m": { "gradient_pct": -9.785872834389835, "start_distance_m": 194.0, "end_distance_m": 214.0, "midpoint_distance_m": 204.0, "start_elevation_m": 219.42637128065277, "end_elevation_m": 217.4691967137748, "start_xy": [ 1005905.0573072325, 6285898.862999965 ], "end_xy": [ 1005916.5766164393, 6285914.300593773 ] }, "min_25m": { "gradient_pct": -10.235043467187893, "start_distance_m": 193.0, "end_distance_m": 218.0, "midpoint_distance_m": 205.5, "start_elevation_m": 219.55836373438515, "end_elevation_m": 216.99960286758818, "start_xy": [ 1005904.6220376365, 6285897.962699805 ], "end_xy": [ 1005920.004358502, 6285916.3622883065 ] }, "min_50m": { "gradient_pct": -2.244797272200344, "start_distance_m": 193.0, "end_distance_m": 243.0, "midpoint_distance_m": 218.0, "start_elevation_m": 219.55836373438515, "end_elevation_m": 218.43596509828498, "start_xy": [ 1005904.6220376365, 6285897.962699805 ], "end_xy": [ 1005942.1278678504, 6285927.82299872 ] }, "min_100m": { "gradient_pct": 2.185750260664321, "start_distance_m": 181.0, "end_distance_m": 281.0, "midpoint_distance_m": 231.0, "start_elevation_m": 218.97571917421274, "end_elevation_m": 221.16146943487706, "start_xy": [ 1005899.3988024835, 6285887.159097881 ], "end_xy": [ 1005976.7261587424, 6285943.492221645 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 34.651116479405175, "start_distance_m": 416.0, "end_distance_m": 418.0, "midpoint_distance_m": 417.0, "start_elevation_m": 246.00085510839395, "end_elevation_m": 246.69387743798205, "start_xy": [ 1006001.2114170942, 6285866.405452776 ], "end_xy": [ 1006003.1560530725, 6285865.938129641 ] }, "max_3m": { "gradient_pct": 31.656974168693825, "start_distance_m": 402.0, "end_distance_m": 405.0, "midpoint_distance_m": 403.5, "start_elevation_m": 242.57269625865013, "end_elevation_m": 243.52240548371094, "start_xy": [ 1005988.677587925, 6285872.413356635 ], "end_xy": [ 1005991.2883939834, 6285870.935624681 ] } }, "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": 0.607, "obstruction_max_height_m": 20.87, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50, 100 ] }, "review": [], "extent": [ "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_E1005-N6285_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1006-N6285_0m5.tif" ], "calculated_at": "2026-09-17T03:09:04+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": [ "E1005-N6285", "E1006-N6285" ], "elevation_blocks": [ "22LHD6RQ@2025-03-13" ], "ign_dalles": [ "LHD_FXX_1005_6286_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1006_6286_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD6RQ" ], "ign_editions": [ "2025-03-13" ], "ign_dsm_edition": { "LHD_FXX_1005_6286_MNT_O_0M50_LAMB93_IGN69": "2025-03-13", "LHD_FXX_1006_6286_MNT_O_0M50_LAMB93_IGN69": "2025-03-13" }, "route_cut_m": 487.1, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 26, "stations_resolved": 26, "width_median_m": 4.25, "width_p10_m": 1.5, "width_min_m": 1.25, "width_max_m": 8.5, "bounded_share": 0.654, "unbounded_share": 0.346, "confidence_median": 0.575, "width_median_bounded_m": 4.25, "window_m": [ 393.0, 418.0 ], "width_at_max25_m": 3.25, "window_stations": 7, "single_track": true, "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": 26, "stations_resolved": 26, "width_median_m": 2.0, "width_p10_m": 1.0, "width_min_m": 0.5, "width_max_m": 6.75, "bounded_share": 1.0, "unbounded_share": 0.0, "confidence_median": 1.0, "width_median_bounded_m": 2.0, "window_m": [ 393.0, 418.0 ], "width_at_max25_m": 2.0, "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": "Montauroux", "county": "Var", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }