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], "end_xy": [ 986613.5907020682, 6558839.8872825615 ] }, "min_50m": { "gradient_pct": -4.702760531785316, "start_distance_m": 1100.0, "end_distance_m": 1150.0, "midpoint_distance_m": 1125.0, "start_elevation_m": 890.8178006020241, "end_elevation_m": 888.4664203361315, "start_xy": [ 986568.5680438493, 6558852.750095634 ], "end_xy": [ 986613.5907020682, 6558839.8872825615 ] }, "min_100m": { "gradient_pct": 1.5401549878195055, "start_distance_m": 8421.0, "end_distance_m": 8521.0, "midpoint_distance_m": 8471.0, "start_elevation_m": 1621.014343821676, "end_elevation_m": 1622.5544988094955, "start_xy": [ 985770.1502418421, 6556953.150934263 ], "end_xy": [ 985717.0663228887, 6556871.347266399 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 41.419128263248695, "start_distance_m": 2339.0, "end_distance_m": 2341.0, "midpoint_distance_m": 2340.0, "start_elevation_m": 1032.8228446769872, "end_elevation_m": 1033.6512272422522, "start_xy": [ 987341.3780301899, 6558583.172007572 ], "end_xy": [ 987343.2906998114, 6558582.587460808 ] }, "max_3m": { "gradient_pct": 32.131084721694, "start_distance_m": 2348.0, "end_distance_m": 2351.0, "midpoint_distance_m": 2349.5, "start_elevation_m": 1035.2712522955394, "end_elevation_m": 1036.2351848371902, "start_xy": [ 987349.985043487, 6558580.541547136 ], "end_xy": [ 987352.8540479194, 6558579.664726991 ] } }, "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": 0.004, "windows_resited": [ 2.0, 3.0, 5.0, 10.0, 20.0, 25.0, 50.0, 100.0 ], "windows_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.09, "obstruction_max_height_m": 28.64, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50, 100 ] }, "excluded_ranges_m": [ [ 1140.0, 1157.0 ], [ 2333.0, 2338.0 ], [ 2342.0, 2347.0 ], [ 7961.0, 7968.0 ] ], "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_E985-N6556_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E985-N6557_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E985-N6559_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E986-N6556_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E986-N6557_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E986-N6558_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E986-N6559_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E987-N6556_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E987-N6557_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E987-N6558_0m5.tif" ], "calculated_at": "2026-09-17T02:24:54+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": [ "E985-N6556", "E985-N6557", "E985-N6559", "E986-N6556", "E986-N6557", "E986-N6558", "E986-N6559", "E987-N6556", "E987-N6557", "E987-N6558" ], "elevation_blocks": [ "21LHD5QK2@2025-06-13" ], "ign_dalles": [ "LHD_FXX_0985_6557_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0985_6558_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0985_6560_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0986_6557_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0986_6558_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0986_6559_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0986_6560_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0987_6557_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0987_6558_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0987_6559_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD5QK2" ], "ign_editions": [ "2025-06-13" ], "ign_dsm_edition": { "LHD_FXX_0985_6557_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0985_6558_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0985_6560_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0986_6557_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0986_6558_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0986_6559_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0986_6560_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0987_6557_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0987_6558_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0987_6559_MNT_O_0M50_LAMB93_IGN69": "2025-06-13" }, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 354, "stations_resolved": 354, "width_median_m": 7.0, "width_p10_m": 4.75, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.249, "unbounded_share": 0.751, "confidence_median": 0.0, "width_median_bounded_m": 6.5, "window_m": [ 1661.0, 1686.0 ], "width_at_max25_m": 4.5, "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": 354, "stations_resolved": 354, "width_median_m": 8.0, "width_p10_m": 1.0, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.65, "unbounded_share": 0.35, "confidence_median": 1.0, "width_median_bounded_m": 6.5, "window_m": [ 1661.0, 1686.0 ], "width_at_max25_m": 1.75, "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": "Samo\u00ebns", "county": "Haute-Savoie", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }