{ "ocl_version": "0.1.0", "name": "Chemin de Vignefranquet", "slug": "chemin-de-vignefranquet", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 27.81325189410211, "diagnostic": true, "flags": [], "start_distance_m": 813.0, "end_distance_m": 815.0, "start_elevation_m": 259.6274398032218, "end_elevation_m": 260.18370484110386, "min_gradient_pct": -7.188481941935265 }, { "window_m": 3.0, "max_gradient_pct": 27.073647325433587, "diagnostic": true, "flags": [], "start_distance_m": 812.0, "end_distance_m": 815.0, "start_elevation_m": 259.37149542134085, "end_elevation_m": 260.18370484110386, "min_gradient_pct": -6.877858633345113 }, { "window_m": 5.0, "max_gradient_pct": 26.761496004803575, "diagnostic": false, "flags": [], "start_distance_m": 812.0, "end_distance_m": 817.0, "start_elevation_m": 259.37149542134085, "end_elevation_m": 260.70957022158103, "min_gradient_pct": -6.560178584809364 }, { "window_m": 10.0, "max_gradient_pct": 26.50156659075435, "diagnostic": false, "flags": [], "start_distance_m": 812.0, "end_distance_m": 822.0, "start_elevation_m": 259.37149542134085, "end_elevation_m": 262.0216520804163, "min_gradient_pct": -6.027789269160735 }, { "window_m": 20.0, "max_gradient_pct": 25.661377002007555, "diagnostic": false, "flags": [], "start_distance_m": 806.0, "end_distance_m": 826.0, "start_elevation_m": 257.89679759789755, "end_elevation_m": 263.02907299829906, "min_gradient_pct": -5.288913373371713 }, { "window_m": 25.0, "max_gradient_pct": 25.178307086390078, "diagnostic": false, "flags": [], "start_distance_m": 806.0, "end_distance_m": 831.0, "start_elevation_m": 257.89679759789755, "end_elevation_m": 264.19137436949507, "min_gradient_pct": -5.061885818572364 }, { "window_m": 50.0, "max_gradient_pct": 23.780074921396476, "diagnostic": false, "flags": [], "start_distance_m": 796.0, "end_distance_m": 846.0, "start_elevation_m": 255.70548703720198, "end_elevation_m": 267.5955244979002, "min_gradient_pct": -3.4388957126024025 }, { "window_m": 100.0, "max_gradient_pct": 22.63901780986245, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 749.0, "end_distance_m": 849.0, "start_elevation_m": 245.56221923718059, "end_elevation_m": 268.20123704704304, "min_gradient_pct": 1.9763484602721633 } ], "shape": { "ascent_concentration": 0.446, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 325.0, "shape_class": "sustained" }, "length_m": 1178.906865115287, "start_elevation_m": 178.3311308886699, "end_elevation_m": 301.36875605854937, "endpoint_gain_m": 123.03762516987948, "overall_gradient_pct": 10.43658568888285, "accumulated_ascent_m": 124.82013106910071, "window_maxima": { "max_5m": { "gradient_pct": 26.761496004803575, "start_distance_m": 812.0, "end_distance_m": 817.0, "midpoint_distance_m": 814.5, "start_elevation_m": 259.37149542134085, "end_elevation_m": 260.70957022158103, "start_xy": [ 1026837.6324965367, 6296115.151148645 ], "end_xy": [ 1026833.8038475092, 6296118.366960615 ] }, "max_10m": { "gradient_pct": 26.50156659075435, "start_distance_m": 812.0, "end_distance_m": 822.0, "midpoint_distance_m": 817.0, "start_elevation_m": 259.37149542134085, "end_elevation_m": 262.0216520804163, "start_xy": [ 1026837.6324965367, 6296115.151148645 ], "end_xy": [ 1026829.9751984817, 6296121.582772585 ] }, "max_20m": { "gradient_pct": 25.661377002007555, "start_distance_m": 806.0, "end_distance_m": 826.0, "midpoint_distance_m": 816.0, "start_elevation_m": 257.89679759789755, "end_elevation_m": 263.02907299829906, "start_xy": [ 1026842.5656588468, 6296111.791288926 ], "end_xy": [ 1026826.9122792596, 6296124.15542216 ] }, "max_25m": { "gradient_pct": 25.178307086390078, "start_distance_m": 806.0, "end_distance_m": 831.0, "midpoint_distance_m": 818.5, "start_elevation_m": 257.89679759789755, "end_elevation_m": 264.19137436949507, "start_xy": [ 1026842.5656588468, 6296111.791288926 ], "end_xy": [ 1026823.0836302321, 6296127.37123413 ] }, "max_50m": { "gradient_pct": 23.780074921396476, "start_distance_m": 796.0, "end_distance_m": 846.0, "midpoint_distance_m": 821.0, "start_elevation_m": 255.70548703720198, "end_elevation_m": 267.5955244979002, "start_xy": [ 1026851.3698662735, 6296107.049355609 ], "end_xy": [ 1026811.5976831496, 6296137.018670039 ] }, "max_100m": { "gradient_pct": 22.63901780986245, "start_distance_m": 749.0, "end_distance_m": 849.0, "midpoint_distance_m": 799.0, "start_elevation_m": 245.56221923718059, "end_elevation_m": 268.20123704704304, "start_xy": [ 1026892.9714163288, 6296085.1924636625 ], "end_xy": [ 1026809.300493733, 6296138.948157221 ] } }, "window_minima": { "min_5m": { "gradient_pct": -6.560178584809364, "start_distance_m": 1013.0, "end_distance_m": 1018.0, "midpoint_distance_m": 1015.5, "start_elevation_m": 286.97852799981945, "end_elevation_m": 286.650519070579, "start_xy": [ 1026780.7083879871, 6296259.360112751 ], "end_xy": [ 1026783.0896160791, 6296263.756674223 ] }, "min_10m": { "gradient_pct": -6.027789269160735, "start_distance_m": 1012.0, "end_distance_m": 1022.0, "midpoint_distance_m": 1017.0, "start_elevation_m": 287.0296197062529, "end_elevation_m": 286.4268407793368, "start_xy": [ 1026780.2321423687, 6296258.480800457 ], "end_xy": [ 1026784.9945985527, 6296267.2739234 ] }, "min_20m": { "gradient_pct": -5.288913373371713, "start_distance_m": 1008.0, "end_distance_m": 1028.0, "midpoint_distance_m": 1018.0, "start_elevation_m": 287.1899074438274, "end_elevation_m": 286.13212476915305, "start_xy": [ 1026778.327159895, 6296254.96355128 ], "end_xy": [ 1026787.8520722633, 6296272.549797166 ] }, "min_25m": { "gradient_pct": -5.061885818572364, "start_distance_m": 1010.0, "end_distance_m": 1035.0, "midpoint_distance_m": 1022.5, "start_elevation_m": 287.11655028881165, "end_elevation_m": 285.85107883416856, "start_xy": [ 1026779.2796511318, 6296256.722175868 ], "end_xy": [ 1026791.1857915921, 6296278.704983226 ] }, "min_50m": { "gradient_pct": -3.4388957126024025, "start_distance_m": 986.0, "end_distance_m": 1036.0, "midpoint_distance_m": 1011.0, "start_elevation_m": 287.5216173219859, "end_elevation_m": 285.8021694656847, "start_xy": [ 1026767.84975629, 6296235.618680805 ], "end_xy": [ 1026791.6620372104, 6296279.584295521 ] }, "min_100m": { "gradient_pct": 1.9763484602721633, "start_distance_m": 946.0, "end_distance_m": 1046.0, "midpoint_distance_m": 996.0, "start_elevation_m": 284.7432347214854, "end_elevation_m": 286.71958318175757, "start_xy": [ 1026752.2850704965, 6296198.804976265 ], "end_xy": [ 1026784.109336369, 6296286.0841434505 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 27.81325189410211, "start_distance_m": 813.0, "end_distance_m": 815.0, "midpoint_distance_m": 814.0, "start_elevation_m": 259.6274398032218, "end_elevation_m": 260.18370484110386, "start_xy": [ 1026836.8667667313, 6296115.794311039 ], "end_xy": [ 1026835.3353071202, 6296117.080635827 ] }, "max_3m": { "gradient_pct": 27.073647325433587, "start_distance_m": 812.0, "end_distance_m": 815.0, "midpoint_distance_m": 813.5, "start_elevation_m": 259.37149542134085, "end_elevation_m": 260.18370484110386, "start_xy": [ 1026837.6324965367, 6296115.151148645 ], "end_xy": [ 1026835.3353071202, 6296117.080635827 ] } }, "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": 0.136, "obstruction_max_height_m": 18.72, "flagged_windows_m": [ 100 ] }, "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_E1026-N6295_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1026-N6296_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1027-N6295_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1027-N6296_0m5.tif" ], "calculated_at": "2026-09-17T02:46:56+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": [ "E1026-N6295", "E1026-N6296", "E1027-N6295", "E1027-N6296" ], "elevation_blocks": [ "22LHD6RQ@2025-03-13" ], "ign_dalles": [ "LHD_FXX_1026_6296_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1026_6297_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1027_6296_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1027_6297_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD6RQ" ], "ign_editions": [ "2025-03-13" ], "ign_dsm_edition": { "LHD_FXX_1026_6296_MNT_O_0M50_LAMB93_IGN69": "2025-03-13", "LHD_FXX_1026_6297_MNT_O_0M50_LAMB93_IGN69": "2025-03-13", "LHD_FXX_1027_6296_MNT_O_0M50_LAMB93_IGN69": "2025-03-13", "LHD_FXX_1027_6297_MNT_O_0M50_LAMB93_IGN69": "2025-03-13" }, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 54, "stations_resolved": 54, "width_median_m": 7.75, "width_p10_m": 5.9, "width_min_m": 3.5, "width_max_m": 11.5, "bounded_share": 0.13, "unbounded_share": 0.87, "confidence_median": 0.0, "width_median_bounded_m": 8.25, "window_m": [ 806.0, 831.0 ], "width_at_max25_m": 8.75, "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": 54, "stations_resolved": 54, "width_median_m": 6.12, "width_p10_m": 1.5, "width_min_m": 1.0, "width_max_m": 12.0, "bounded_share": 0.852, "unbounded_share": 0.148, "confidence_median": 1.0, "width_median_bounded_m": 5.5, "window_m": [ 806.0, 831.0 ], "width_at_max25_m": 4.75, "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": "Roquefort-les-Pins", "county": "Alpes-Maritimes", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }