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"end_distance_m": 3312.0, "midpoint_distance_m": 3262.0, "start_elevation_m": 1515.798033907289, "end_elevation_m": 1511.6083974866403, "start_xy": [ 933889.5718018158, 6404070.812493924 ], "end_xy": [ 933944.0834256781, 6404154.488074833 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 17.94299904285026, "start_distance_m": 5947.0, "end_distance_m": 5949.0, "midpoint_distance_m": 5948.0, "start_elevation_m": 1650.2185975475281, "end_elevation_m": 1650.5774575283851, "start_xy": [ 936239.317459207, 6403840.751117426 ], "end_xy": [ 936241.1086016755, 6403839.8612811165 ] }, "max_3m": { "gradient_pct": 15.420387739906497, "start_distance_m": 5946.0, "end_distance_m": 5949.0, "midpoint_distance_m": 5947.5, "start_elevation_m": 1650.114845896188, "end_elevation_m": 1650.5774575283851, "start_xy": [ 936238.4218879727, 6403841.196035581 ], "end_xy": [ 936241.1086016755, 6403839.8612811165 ] } }, "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": 0.019, "windows_resited": [ 2.0, 3.0, 5.0, 10.0, 20.0 ], "windows_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.028, "obstruction_max_height_m": 17.34, "flagged_windows_m": [] }, "excluded_ranges_m": [ [ 0.0, 43.0 ], [ 343.0, 367.0 ], [ 626.0, 672.0 ] ], "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_E933-N6401_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E933-N6402_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E933-N6403_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E933-N6404_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E934-N6401_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E934-N6402_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E934-N6403_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E934-N6404_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E935-N6403_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E935-N6404_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E936-N6403_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E936-N6404_0m5.tif" ], "calculated_at": "2026-09-17T04:05:03+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps3.osm.pbf", "osm_snapshot": "", "run_id": "fr-alps3", "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": [ "E933-N6401", "E933-N6402", "E933-N6403", "E933-N6404", "E934-N6401", "E934-N6402", "E934-N6403", "E934-N6404", "E935-N6403", "E935-N6404", "E936-N6403", "E936-N6404" ], "elevation_blocks": [ "21LHD7PN@2025-02-20", "21LHD8QN@2025-02-20" ], "ign_dalles": [ "LHD_FXX_0933_6402_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0933_6403_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0933_6404_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0933_6405_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0934_6402_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0934_6403_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0934_6404_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0934_6405_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0935_6404_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0935_6405_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0936_6404_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0936_6405_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD7PN", "21LHD8QN" ], "ign_editions": [ "2025-02-20" ], "ign_dsm_edition": { "LHD_FXX_0933_6402_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0933_6403_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0933_6404_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0933_6405_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0934_6402_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0934_6403_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0934_6404_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0934_6405_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0935_6404_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0935_6405_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0936_6404_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0936_6405_MNT_O_0M50_LAMB93_IGN69": "2025-02-20" }, "climb_origin": "named-pass", "structure_own_ways": 16, "structure_mask_ranges_m": [ [ 631.3, 668.0 ], [ 349.0, 362.9 ], [ 0.0, 15.0 ] ], "mask_basin_extension_m": 23.0, "carriageway": { "stations": 252, "stations_resolved": 252, "width_median_m": 5.75, "width_p10_m": 4.5, "width_min_m": 3.75, "width_max_m": 12.0, "bounded_share": 0.31, "unbounded_share": 0.69, "confidence_median": 0.0, "width_median_bounded_m": 5.75, "window_m": [ 5696.0, 5721.0 ], "width_at_max25_m": 4.75, "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": 252, "stations_resolved": 252, "width_median_m": 8.0, "width_p10_m": 6.25, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.694, "unbounded_share": 0.306, "confidence_median": 1.0, "width_median_bounded_m": 7.5, "window_m": [ 5696.0, 5721.0 ], "width_at_max25_m": 7.75, "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": "Le D\u00e9voluy", "county": "Hautes-Alpes", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }