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}, "min_50m": { "gradient_pct": 0.8582948554894756, "start_distance_m": 39.0, "end_distance_m": 89.0, "midpoint_distance_m": 64.0, "start_elevation_m": 707.2155454998061, "end_elevation_m": 707.6446929275509, "start_xy": [ 963116.3791584491, 6563640.889300003 ], "end_xy": [ 963083.9583346859, 6563603.460885758 ] }, "min_100m": { "gradient_pct": 1.5329583090890537, "start_distance_m": 34.0, "end_distance_m": 134.0, "midpoint_distance_m": 84.0, "start_elevation_m": 707.0604248678255, "end_elevation_m": 708.5933831769146, "start_xy": [ 963117.4360648504, 6563645.771397476 ], "end_xy": [ 963051.8654376558, 6563571.933052331 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 25.89306397445057, "start_distance_m": 678.0, "end_distance_m": 680.0, "midpoint_distance_m": 679.0, "start_elevation_m": 773.7001969151333, "end_elevation_m": 774.2180581946224, "start_xy": [ 963173.7840872973, 6563318.912310104 ], "end_xy": [ 963175.3319717925, 6563317.645797732 ] }, "max_3m": { 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Diagnostic use only: never a headline or ranking value.", "quality_summary": { "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.26, "obstruction_max_height_m": 20.15, "flagged_windows_m": [ 2, 3, 25, 50, 100 ] }, "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_E962-N6563_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E963-N6563_0m5.tif" ], "calculated_at": "2026-09-17T03:28:09+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": [ "E962-N6563", "E963-N6563" ], "elevation_blocks": [ "21LHD5QK2@2025-06-13" ], "ign_dalles": [ "LHD_FXX_0962_6564_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0963_6564_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD5QK2" ], "ign_editions": [ "2025-06-13" ], "ign_dsm_edition": { "LHD_FXX_0962_6564_MNT_O_0M50_LAMB93_IGN69": "2025-06-13", "LHD_FXX_0963_6564_MNT_O_0M50_LAMB93_IGN69": "2025-06-13" }, "climb_origin": "discovered", "structure_own_ways": 2, "carriageway": { "stations": 33, "stations_resolved": 33, "width_median_m": 6.75, "width_p10_m": 4.1, "width_min_m": 3.0, "width_max_m": 9.0, "bounded_share": 0.152, "unbounded_share": 0.848, "confidence_median": 0.0, "width_median_bounded_m": 8.5, "window_m": [ 650.0, 675.0 ], "width_at_max25_m": 4.5, "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": 33, "stations_resolved": 33, "width_median_m": 9.75, "width_p10_m": 3.05, "width_min_m": 1.5, "width_max_m": 12.0, "bounded_share": 0.455, "unbounded_share": 0.545, "confidence_median": 0.0, "width_median_bounded_m": 4.0, "window_m": [ 650.0, 675.0 ], "width_at_max25_m": 10.12, "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": "Saint-Jean-de-Tholome", "county": "Haute-Savoie", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }