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475.0, "start_elevation_m": 874.2191966965122, "end_elevation_m": 867.6070329728095, "start_xy": [ 991480.515992353, 6330016.068169753 ], "end_xy": [ 991456.3816485612, 6330059.847984207 ] }, "min_100m": { "gradient_pct": -3.818892393170472, "start_distance_m": 816.0, "end_distance_m": 916.0, "midpoint_distance_m": 866.0, "start_elevation_m": 893.1175732661133, "end_elevation_m": 889.2986808729428, "start_xy": [ 991308.191072409, 6330327.422113239 ], "end_xy": [ 991240.0561566965, 6330396.50400295 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 22.922677840927008, "start_distance_m": 790.0, "end_distance_m": 792.0, "midpoint_distance_m": 791.0, "start_elevation_m": 891.2094906952406, "end_elevation_m": 891.6679442520591, "start_xy": [ 991323.3049114163, 6330306.292459002 ], "end_xy": [ 991322.1863530214, 6330307.950417722 ] }, "max_3m": { "gradient_pct": 17.238853220840156, "start_distance_m": 789.0, "end_distance_m": 792.0, "midpoint_distance_m": 790.5, 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Diagnostic use only: never a headline or ranking value.", "quality_summary": { "structure_suppression": { "masked_fraction": 0.018, "windows_resited": [ 2.0, 3.0, 5.0, 10.0, 20.0, 25.0, 50.0, 100.0 ], "windows_unresolved": [] }, "placement_suppression": { "masked_fraction": 0.019, "windows_resited": [], "windows_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.027, "obstruction_max_height_m": 16.7, "flagged_windows_m": [] }, "excluded_ranges_m": [ [ 0.0, 33.0 ], [ 145.0, 161.0 ], [ 216.0, 232.0 ], [ 481.0, 517.0 ], [ 900.0, 930.0 ], [ 980.0, 992.0 ], [ 1815.0, 1849.0 ], [ 2319.0, 2335.0 ], [ 4062.0, 4078.0 ], [ 4828.0, 4848.0 ], [ 6702.0, 6707.0 ] ], "review": [], "extent": [ "descends_at_start" ] }, "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_E988-N6332_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E988-N6333_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E988-N6334_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E988-N6335_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E988-N6336_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E989-N6331_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E989-N6332_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E989-N6333_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E989-N6334_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E989-N6335_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E989-N6336_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E990-N6330_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E990-N6331_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E990-N6332_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E991-N6329_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E991-N6330_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E991-N6331_0m5.tif" ], "calculated_at": "2026-09-17T02:01:10+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": [ "E988-N6332", "E988-N6333", "E988-N6334", "E988-N6335", "E988-N6336", "E989-N6331", "E989-N6332", "E989-N6333", "E989-N6334", "E989-N6335", "E989-N6336", "E990-N6330", "E990-N6331", "E990-N6332", "E991-N6329", "E991-N6330", "E991-N6331" ], "elevation_blocks": [ "21LHD8RO@2025-04-02", "21LHD8RP@2025-03-06" ], "ign_dalles": [ "LHD_FXX_0988_6333_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0988_6334_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0988_6335_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0988_6336_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0988_6337_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0989_6332_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0989_6333_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0989_6334_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0989_6335_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0989_6336_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0989_6337_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0990_6331_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0990_6332_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0990_6333_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0991_6330_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0991_6331_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0991_6332_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD8RO", "21LHD8RP" ], "ign_editions": [ "2025-03-06", "2025-04-02" ], "ign_dsm_edition": { "LHD_FXX_0988_6333_MNT_O_0M50_LAMB93_IGN69": "2025-03-06", "LHD_FXX_0988_6334_MNT_O_0M50_LAMB93_IGN69": "2025-04-02", "LHD_FXX_0988_6335_MNT_O_0M50_LAMB93_IGN69": "2025-04-02", "LHD_FXX_0988_6336_MNT_O_0M50_LAMB93_IGN69": "2025-04-02", "LHD_FXX_0988_6337_MNT_O_0M50_LAMB93_IGN69": "2025-04-02", "LHD_FXX_0989_6332_MNT_O_0M50_LAMB93_IGN69": "2025-03-06", "LHD_FXX_0989_6333_MNT_O_0M50_LAMB93_IGN69": "2025-03-06", "LHD_FXX_0989_6334_MNT_O_0M50_LAMB93_IGN69": "2025-04-02", "LHD_FXX_0989_6335_MNT_O_0M50_LAMB93_IGN69": "2025-04-02", "LHD_FXX_0989_6336_MNT_O_0M50_LAMB93_IGN69": "2025-04-02", "LHD_FXX_0989_6337_MNT_O_0M50_LAMB93_IGN69": "2025-04-02", "LHD_FXX_0990_6331_MNT_O_0M50_LAMB93_IGN69": "2025-03-06", "LHD_FXX_0990_6332_MNT_O_0M50_LAMB93_IGN69": "2025-03-06", "LHD_FXX_0990_6333_MNT_O_0M50_LAMB93_IGN69": "2025-03-06", "LHD_FXX_0991_6330_MNT_O_0M50_LAMB93_IGN69": "2025-03-06", "LHD_FXX_0991_6331_MNT_O_0M50_LAMB93_IGN69": "2025-03-06", "LHD_FXX_0991_6332_MNT_O_0M50_LAMB93_IGN69": "2025-03-06" }, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 532, "stations_resolved": 532, "width_median_m": 6.0, "width_p10_m": 4.5, "width_min_m": 1.0, "width_max_m": 12.0, "bounded_share": 0.434, "unbounded_share": 0.566, "confidence_median": 0.0, "width_median_bounded_m": 5.75, "window_m": [ 7840.0, 7865.0 ], "width_at_max25_m": 8.5, "window_stations": 6, "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": 532, "stations_resolved": 532, "width_median_m": 7.5, "width_p10_m": 4.5, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.784, "unbounded_share": 0.216, "confidence_median": 1.0, "width_median_bounded_m": 7.0, "window_m": [ 7840.0, 7865.0 ], "width_at_max25_m": 11.0, "window_stations": 6, "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": "Le Fugeret", "county": "Alpes-de-Haute-Provence", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }