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"end_distance_m": 957.0, "midpoint_distance_m": 907.0, "start_elevation_m": 294.0997312098864, "end_elevation_m": 291.8665739678672, "start_xy": [ 911120.0182837463, 6500432.126015669 ], "end_xy": [ 911203.5562772917, 6500486.104027342 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 37.097123057321824, "start_distance_m": 1149.0, "end_distance_m": 1151.0, "midpoint_distance_m": 1150.0, "start_elevation_m": 300.27397377556247, "end_elevation_m": 301.0159162367089, "start_xy": [ 911346.4150226509, 6500604.122828643 ], "end_xy": [ 911348.1624335129, 6500605.095739368 ] }, "max_3m": { "gradient_pct": 32.639409813625285, "start_distance_m": 1533.0, "end_distance_m": 1536.0, "midpoint_distance_m": 1534.5, "start_elevation_m": 318.3444889489369, "end_elevation_m": 319.32367124334564, "start_xy": [ 911443.3086095589, 6500954.850596699 ], "end_xy": [ 911445.6145302872, 6500956.769640626 ] } }, "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 ], "windows_unresolved": [] }, "texture_suppression": { "masked_fraction": 0.008, "windows_resited": [ 2.0, 5.0 ], "windows_unresolved": [] }, "texture_windows": { "rounds": 1, "windows_masked": [ { "window_m": 5.0, "start_m": 1382.0, "end_m": 1387.0, "raw_pct": 30.26, "reason": "short-step" } ], "advisory": [], "unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.169, "obstruction_max_height_m": 31.04, "flagged_windows_m": [ 2, 10, 20, 25, 50, 100 ] }, "excluded_ranges_m": [ [ 1162.0, 1167.0 ], [ 1177.0, 1182.0 ], [ 1380.0, 1389.0 ] ], "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_E910-N6499_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E910-N6500_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E911-N6500_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E911-N6501_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E912-N6501_0m5.tif" ], "calculated_at": "2026-09-17T02:37:51+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps2.osm.pbf", "osm_snapshot": "", "run_id": "fr-alps2", "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": [ "E910-N6499", "E910-N6500", "E911-N6500", "E911-N6501", "E912-N6501" ], "elevation_blocks": [ "21LHD6PL@2025-03-07" ], "ign_dalles": [ "LHD_FXX_0910_6500_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0910_6501_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0911_6501_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0911_6502_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0912_6502_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD6PL" ], "ign_editions": [ "2025-03-07" ], "ign_dsm_edition": { "LHD_FXX_0910_6500_MNT_O_0M50_LAMB93_IGN69": "2025-03-07", "LHD_FXX_0910_6501_MNT_O_0M50_LAMB93_IGN69": "2025-03-07", "LHD_FXX_0911_6501_MNT_O_0M50_LAMB93_IGN69": "2025-03-07", "LHD_FXX_0911_6502_MNT_O_0M50_LAMB93_IGN69": "2025-03-07", "LHD_FXX_0912_6502_MNT_O_0M50_LAMB93_IGN69": "2025-03-07" }, "climb_origin": "discovered", "structure_own_ways": 4, "carriageway": { "stations": 119, "stations_resolved": 119, "width_median_m": 7.25, "width_p10_m": 4.75, "width_min_m": 1.0, "width_max_m": 11.75, "bounded_share": 0.244, "unbounded_share": 0.756, "confidence_median": 0.0, "width_median_bounded_m": 6.75, "window_m": [ 2710.0, 2735.0 ], "width_at_max25_m": 5.88, "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": 119, "stations_resolved": 119, "width_median_m": 7.25, "width_p10_m": 0.75, "width_min_m": 0.0, "width_max_m": 12.0, "bounded_share": 0.622, "unbounded_share": 0.378, "confidence_median": 1.0, "width_median_bounded_m": 5.12, "window_m": [ 2710.0, 2735.0 ], "width_at_max25_m": 1.12, "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": "Avressieux", "county": "Savoie", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }