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"end_distance_m": 1282.0, "midpoint_distance_m": 1232.0, "start_elevation_m": 245.3301062896553, "end_elevation_m": 244.7118989478836, "start_xy": [ 1020871.4800226649, 6289930.937998273 ], "end_xy": [ 1020918.7456215965, 6290017.070809838 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 54.06574670650173, "start_distance_m": 1180.0, "end_distance_m": 1182.0, "midpoint_distance_m": 1181.0, "start_elevation_m": 244.24879135552527, "end_elevation_m": 245.3301062896553, "start_xy": [ 1020871.2680435985, 6289928.949263782 ], "end_xy": [ 1020871.4800226649, 6289930.937998273 ] }, "max_3m": { "gradient_pct": 37.930330090827624, "start_distance_m": 1179.0, "end_distance_m": 1182.0, "midpoint_distance_m": 1180.5, "start_elevation_m": 244.19219638693048, "end_elevation_m": 245.3301062896553, "start_xy": [ 1020871.1620540654, 6289927.954896537 ], "end_xy": [ 1020871.4800226649, 6289930.937998273 ] } }, "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 ], "windows_unresolved": [] }, "no_bench_suppression": { "masked_fraction": 0.042, "windows_resited": [], "windows_unresolved": [] }, "texture_suppression": { "masked_fraction": 0.075, "windows_resited": [ 5.0 ], "windows_unresolved": [] }, "texture_windows": { "rounds": 4, "windows_masked": [ { "window_m": 10.0, "start_m": 771.0, "end_m": 781.0, "raw_pct": 30.07, "reason": "hump+short-step" }, { "window_m": 5.0, "start_m": 773.0, "end_m": 778.0, "raw_pct": 39.24, "reason": "hump+short-step" }, { "window_m": 5.0, "start_m": 1034.0, "end_m": 1039.0, "raw_pct": 35.99, "reason": "short-step" }, { "window_m": 5.0, "start_m": 1005.0, "end_m": 1010.0, "raw_pct": 29.76, "reason": "short-step" }, { "window_m": 5.0, "start_m": 760.0, "end_m": 765.0, "raw_pct": 25.56, "reason": "mask-edge" } ], "advisory": [], "unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.404, "obstruction_max_height_m": 23.91, "flagged_windows_m": [ 2, 3 ] }, "excluded_ranges_m": [ [ 360.0, 365.0 ], [ 758.0, 767.0 ], [ 769.0, 783.0 ], [ 1003.0, 1012.0 ], [ 1032.0, 1041.0 ], [ 1060.0, 1110.0 ] ], "review": [], "extent": [] }, "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_E1020-N6288_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1020-N6289_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1020-N6290_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1021-N6288_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1021-N6289_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1021-N6290_0m5.tif" ], "calculated_at": "2026-09-17T02:31:53+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": [ "E1020-N6288", "E1020-N6289", "E1020-N6290", "E1021-N6288", "E1021-N6289", "E1021-N6290" ], "elevation_blocks": [ "22LHD6RQ@2025-03-13" ], "ign_dalles": [ "LHD_FXX_1020_6289_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1020_6290_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1020_6291_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1021_6289_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1021_6290_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1021_6291_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD6RQ" ], "ign_editions": [ "2025-03-13" ], "ign_dsm_edition": { "LHD_FXX_1020_6289_MNT_O_0M50_LAMB93_IGN69": "2025-03-13", "LHD_FXX_1020_6290_MNT_O_0M50_LAMB93_IGN69": "2025-03-13", "LHD_FXX_1020_6291_MNT_O_0M50_LAMB93_IGN69": "2025-03-13", "LHD_FXX_1021_6289_MNT_O_0M50_LAMB93_IGN69": "2025-03-13", "LHD_FXX_1021_6290_MNT_O_0M50_LAMB93_IGN69": "2025-03-13", "LHD_FXX_1021_6291_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": 61, "stations_resolved": 61, "width_median_m": 5.75, "width_p10_m": 2.25, "width_min_m": 1.0, "width_max_m": 11.75, "bounded_share": 0.443, "unbounded_share": 0.557, "confidence_median": 0.0, "width_median_bounded_m": 4.75, "window_m": [ 456.0, 481.0 ], "width_at_max25_m": 7.75, "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": 61, "stations_resolved": 61, "width_median_m": 4.25, "width_p10_m": 1.25, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.836, "unbounded_share": 0.164, "confidence_median": 1.0, "width_median_bounded_m": 4.0, "window_m": [ 456.0, 481.0 ], "width_at_max25_m": 8.25, "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": "Mouans-Sartoux", "county": "Alpes-Maritimes", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }