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"midpoint_distance_m": 1001.0, "start_elevation_m": 1124.9484368653098, "end_elevation_m": 1125.456536385508, "start_xy": [ 985074.1322421412, 6591209.868403452 ], "end_xy": [ 985076.1321421292, 6591209.882960174 ] }, "max_3m": { "gradient_pct": 22.785947833813225, "start_distance_m": 1000.0, "end_distance_m": 1003.0, "midpoint_distance_m": 1001.5, "start_elevation_m": 1124.9484368653098, "end_elevation_m": 1125.6320153003242, "start_xy": [ 985074.1322421412, 6591209.868403452 ], "end_xy": [ 985077.1308603234, 6591209.931168344 ] } }, "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": 0.066, "windows_resited": [ 2.0, 3.0, 5.0, 10.0, 20.0, 25.0, 50.0, 100.0 ], "windows_unresolved": [], "minima_resited": [ 5.0, 100.0 ], "minima_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.19, "obstruction_max_height_m": 19.78, "flagged_windows_m": [ 2, 3, 20, 25, 50 ] }, "excluded_ranges_m": [ [ 0.0, 20.0 ], [ 954.0, 999.0 ] ], "review": [], "extent": [ "may_start_earlier", "may_continue_beyond_end" ] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "cd1381c557ec0196a6c481fc125290b249b285c2", "code_git_dirty": "true", "analysis_version": "0.1.0", "analysis_config_digest": "sha256:faa4beed0662d2f6", "python": "3.14.4", "numpy": "2.5.3", "rasterio": "1.5.1", "pyproj": "3.8.0", "laspy": "2.7.0", "shapely": "2.1.2", "pyosmium": "4.3.1", "libosmium": "2.23.1", "gdal": "3.12.4", "proj": "9.8.1", "run_id": "remeasure-260920-fr", "road_pbf": "batch-france-chunk049.pbf", "region_key": "france", "crs": "EPSG:2154", "elevation_provider_key": "ign-lidarhd", "tile_index": "wms-grid", "authority": "bdtopo", "registry_pbf": "france-vosges-2026-09-16.osm.pbf", "tile_index_snapshot": "sha256:c5a1da76210792fa" }, "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_E984-N6590_0m5@21LHD5QK2-2025-06-13.tif", "data/cache/fr/ign-lidarhd_dtm_E984-N6591_0m5@21LHD5QK2-2025-06-13.tif", "data/cache/fr/ign-lidarhd_dtm_E985-N6590_0m5@21LHD5QK2-2025-06-13.tif", "data/cache/fr/ign-lidarhd_dtm_E985-N6591_0m5@21LHD5QK2-2025-06-13.tif" ], "calculated_at": "2026-09-21T01:58:33+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "output/remeasure-260920/fr/batch-france-chunk049.pbf", "osm_snapshot": "", "run_id": "remeasure-260920-fr", "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": [ "E984-N6590", "E984-N6591", "E985-N6590", "E985-N6591" ], "elevation_blocks": [ "21LHD5QK2@2025-06-13" ], "ign_dalles": [ "LHD_FXX_0984_6591_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0984_6592_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0985_6591_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0985_6592_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD5QK2" ], "ign_editions": [ "2025-06-13" ], "ign_dsm_edition": { "LHD_FXX_0984_6591_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0984_6592_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0985_6591_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0985_6592_MNT_O_0M50_LAMB93_IGN69": "2025-06-13" }, "elevation_cache_legacy_tiles": { "E984-N6590/dtm": "cached before the sidecar rule (2026-09-19); its bytes are now digested, but the IGN LiDAR HD MNT 0.5 m edition they came from was never proven", "E984-N6591/dtm": "cached before the sidecar rule (2026-09-19); its bytes are now digested, but the IGN LiDAR HD MNT 0.5 m edition they came from was never proven", "E985-N6590/dtm": "cached before the sidecar rule (2026-09-19); its bytes are now digested, but the IGN LiDAR HD MNT 0.5 m edition they came from was never proven", "E985-N6591/dtm": "cached before the sidecar rule (2026-09-19); its bytes are now digested, but the IGN LiDAR HD MNT 0.5 m edition they came from was never proven" }, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "structure_mask_ranges_m": [ [ 0.0, 15.0 ], [ 964.7, 994.7 ], [ 962.2, 992.2 ], [ 961.8, 991.8 ], [ 959.9, 989.9 ] ], "carriageway": { "stations": 47, "stations_resolved": 47, "width_median_m": 5.5, "width_p10_m": 4.0, "width_min_m": 3.0, "width_max_m": 12.0, "bounded_share": 0.17, "unbounded_share": 0.83, "confidence_median": 0.0, "width_median_bounded_m": 4.38, "window_m": [ 928.0, 953.0 ], "width_at_max25_m": 5.25, "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": 47, "stations_resolved": 47, "width_median_m": 6.25, "width_p10_m": 0.75, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.638, "unbounded_share": 0.362, "confidence_median": 1.0, "width_median_bounded_m": 4.0, "window_m": [ 928.0, 953.0 ], "width_at_max25_m": 2.25, "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 } }, "remeasured": { "on": "2026-09-21", "why": "corpus re-measure 2026-09-21: a mask that exists today reaching a page published before it did; fallers only (Peter: fold the fallers)", "published_max25_pct": 22.01, "max25_pct": 16.04 }, "license": "ODbL-1.0", "license_url": "https://howsteep.org/licensing" }, "area": { "place": "Bernex", "county": "Haute-Savoie", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }