{ "ocl_version": "0.1.0", "name": "Chemin de l'\u00c9palud", "slug": "chemin-de-l-epalud", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 51.323119315867416, "diagnostic": true, "flags": [ "structure_excluded", "canopy_or_structure" ], "start_distance_m": 517.0, "end_distance_m": 519.0, "start_elevation_m": 539.264911172737, "end_elevation_m": 540.2913735590544, "min_gradient_pct": -19.501991054562495, "suppressed_max_gradient_pct": 54.371532906958464, "suppressed_location_m": [ 380.0, 382.0 ] }, { "window_m": 3.0, "max_gradient_pct": 48.604921767616815, "diagnostic": true, "flags": [ "structure_excluded", "canopy_or_structure" ], "start_distance_m": 516.0, "end_distance_m": 519.0, "start_elevation_m": 538.8332259060259, "end_elevation_m": 540.2913735590544, "min_gradient_pct": -19.530775533223732, "suppressed_max_gradient_pct": 51.444361627663206, "suppressed_location_m": [ 380.0, 383.0 ] }, { "window_m": 5.0, "max_gradient_pct": 41.04074541432965, "diagnostic": false, "flags": [ "structure_excluded", "canopy_or_structure" ], "start_distance_m": 491.0, "end_distance_m": 496.0, "start_elevation_m": 532.6302335475916, "end_elevation_m": 534.6822708183081, "min_gradient_pct": -15.697114495985716, "suppressed_max_gradient_pct": 47.139077527413065, "suppressed_location_m": [ 380.0, 385.0 ] }, { "window_m": 10.0, "max_gradient_pct": 37.92519419632072, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 490.0, "end_distance_m": 500.0, "start_elevation_m": 532.3889075727836, "end_elevation_m": 536.1814269924157, "min_gradient_pct": -9.782044522097522 }, { "window_m": 20.0, "max_gradient_pct": 31.006340981222706, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 489.0, "end_distance_m": 509.0, "start_elevation_m": 532.1276449723215, "end_elevation_m": 538.328913168566, "min_gradient_pct": -5.182798415637535 }, { "window_m": 25.0, "max_gradient_pct": 28.560998533156635, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 484.0, "end_distance_m": 509.0, "start_elevation_m": 531.1886635352769, "end_elevation_m": 538.328913168566, "min_gradient_pct": -4.047638622129853 }, { "window_m": 50.0, "max_gradient_pct": 24.024731757975815, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 472.0, "end_distance_m": 522.0, "start_elevation_m": 529.105707851236, "end_elevation_m": 541.118073730224, "min_gradient_pct": -2.929997214285322 }, { "window_m": 100.0, "max_gradient_pct": 19.970569567444954, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 421.0, "end_distance_m": 521.0, "start_elevation_m": 520.8723212716873, "end_elevation_m": 540.8428908391322, "min_gradient_pct": -2.5287811252630945 } ], "shape": { "ascent_concentration": 0.663, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 134.0, "shape_class": "stepped" }, "length_m": 1979.2705775259226, "start_elevation_m": 500.9566643002935, "end_elevation_m": 568.9167528786653, "endpoint_gain_m": 67.96008857837182, "overall_gradient_pct": 3.433592624982157, "accumulated_ascent_m": 79.53834372381948, "window_maxima": { "max_5m": { "gradient_pct": 41.04074541432965, "start_distance_m": 491.0, "end_distance_m": 496.0, "midpoint_distance_m": 493.5, "start_elevation_m": 532.6302335475916, "end_elevation_m": 534.6822708183081, "start_xy": [ 878612.5389340954, 6486297.41570977 ], "end_xy": [ 878611.1672350832, 6486292.607545691 ] }, "max_10m": { "gradient_pct": 37.92519419632072, "start_distance_m": 490.0, "end_distance_m": 500.0, "midpoint_distance_m": 495.0, "start_elevation_m": 532.3889075727836, "end_elevation_m": 536.1814269924157, "start_xy": [ 878612.8132738979, 6486298.377342586 ], "end_xy": [ 878610.0698758733, 6486288.761014426 ] }, "max_20m": { "gradient_pct": 31.006340981222706, "start_distance_m": 489.0, "end_distance_m": 509.0, "midpoint_distance_m": 499.0, "start_elevation_m": 532.1276449723215, "end_elevation_m": 538.328913168566, "start_xy": [ 878613.0876137004, 6486299.3389754025 ], "end_xy": [ 878607.6008176511, 6486280.106319083 ] }, "max_25m": { "gradient_pct": 28.560998533156635, "start_distance_m": 484.0, "end_distance_m": 509.0, "midpoint_distance_m": 496.5, "start_elevation_m": 531.1886635352769, "end_elevation_m": 538.328913168566, "start_xy": [ 878614.4593127127, 6486304.147139482 ], "end_xy": [ 878607.6008176511, 6486280.106319083 ] }, "max_50m": { "gradient_pct": 24.024731757975815, "start_distance_m": 472.0, "end_distance_m": 522.0, "midpoint_distance_m": 497.0, "start_elevation_m": 529.105707851236, "end_elevation_m": 541.118073730224, "start_xy": [ 878617.7513903421, 6486315.686733274 ], "end_xy": [ 878604.0344002192, 6486267.605092474 ] }, "max_100m": { "gradient_pct": 19.970569567444954, "start_distance_m": 421.0, "end_distance_m": 521.0, "midpoint_distance_m": 471.0, "start_elevation_m": 520.8723212716873, "end_elevation_m": 540.8428908391322, "start_xy": [ 878639.6231066566, 6486361.296913447 ], "end_xy": [ 878604.3087400217, 6486268.56672529 ] } }, "window_minima": { "min_5m": { "gradient_pct": -15.697114495985716, "start_distance_m": 675.0, "end_distance_m": 680.0, "midpoint_distance_m": 677.5, "start_elevation_m": 549.5001383349693, "end_elevation_m": 548.71528261017, "start_xy": [ 878583.9107890322, 6486116.094231229 ], "end_xy": [ 878583.35215283, 6486111.125536673 ] }, "min_10m": { "gradient_pct": -9.782044522097522, "start_distance_m": 674.0, "end_distance_m": 684.0, "midpoint_distance_m": 679.0, "start_elevation_m": 549.6174339585249, "end_elevation_m": 548.6392295063151, "start_xy": [ 878584.0225162727, 6486117.08797014 ], "end_xy": [ 878582.9052438682, 6486107.150581027 ] }, "min_20m": { "gradient_pct": -5.182798415637535, "start_distance_m": 662.0, "end_distance_m": 682.0, "midpoint_distance_m": 672.0, "start_elevation_m": 549.6592648160337, "end_elevation_m": 548.6227051329062, "start_xy": [ 878585.363243158, 6486129.012837076 ], "end_xy": [ 878583.1286983491, 6486109.138058851 ] }, "min_25m": { "gradient_pct": -4.047638622129853, "start_distance_m": 658.0, "end_distance_m": 683.0, "midpoint_distance_m": 670.5, "start_elevation_m": 549.6228918933044, "end_elevation_m": 548.610982237772, "start_xy": [ 878585.8101521197, 6486132.98779272 ], "end_xy": [ 878583.0169711087, 6486108.1443199385 ] }, "min_50m": { "gradient_pct": -2.929997214285322, "start_distance_m": 1574.0, "end_distance_m": 1624.0, "midpoint_distance_m": 1599.0, "start_elevation_m": 563.1968209906885, "end_elevation_m": 561.7318223835458, "start_xy": [ 878343.4585222084, 6486761.598223875 ], "end_xy": [ 878333.7476768615, 6486810.610962402 ] }, "min_100m": { "gradient_pct": -2.5287811252630945, "start_distance_m": 1529.0, "end_distance_m": 1629.0, "midpoint_distance_m": 1579.0, "start_elevation_m": 564.1233608895623, "end_elevation_m": 561.5945797642992, "start_xy": [ 878352.9289654318, 6486717.606253218 ], "end_xy": [ 878333.1361921753, 6486815.573430183 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 51.323119315867416, "start_distance_m": 517.0, "end_distance_m": 519.0, "midpoint_distance_m": 518.0, "start_elevation_m": 539.264911172737, "end_elevation_m": 540.2913735590544, "start_xy": [ 878605.4060992314, 6486272.413256555 ], "end_xy": [ 878604.8574196266, 6486270.489990923 ] }, "max_3m": { "gradient_pct": 48.604921767616815, "start_distance_m": 516.0, "end_distance_m": 519.0, "midpoint_distance_m": 517.5, "start_elevation_m": 538.8332259060259, "end_elevation_m": 540.2913735590544, "start_xy": [ 878605.680439034, 6486273.374889371 ], "end_xy": [ 878604.8574196266, 6486270.489990923 ] } }, "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": 0.003, "windows_resited": [ 2.0, 3.0, 5.0 ], "windows_unresolved": [] }, "no_bench_suppression": { "masked_fraction": 0.034, "windows_resited": [], "windows_unresolved": [] }, "placement_suppression": { "masked_fraction": 0.049, "windows_resited": [], "windows_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.171, "obstruction_max_height_m": 23.35, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50, 100 ] }, "excluded_ranges_m": [ [ 378.0, 383.0 ], [ 550.0, 580.0 ], [ 610.0, 670.0 ] ], "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_E878-N6486_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E878-N6487_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E879-N6486_0m5.tif" ], "calculated_at": "2026-09-17T04:15:39+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps1.osm.pbf", "osm_snapshot": "", "run_id": "fr-alps1", "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": [ "E878-N6486", "E878-N6487", "E879-N6486" ], "elevation_blocks": [ "21LHD6OL@2025-02-20" ], "ign_dalles": [ "LHD_FXX_0878_6487_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0878_6488_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0879_6487_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD6OL" ], "ign_editions": [ "2025-02-20" ], "ign_dsm_edition": { "LHD_FXX_0878_6487_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0878_6488_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0879_6487_MNT_O_0M50_LAMB93_IGN69": "2025-02-20" }, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 86, "stations_resolved": 86, "width_median_m": 6.0, "width_p10_m": 2.12, "width_min_m": 1.0, "width_max_m": 12.0, "bounded_share": 0.209, "unbounded_share": 0.791, "confidence_median": 0.0, "width_median_bounded_m": 2.38, "window_m": [ 484.0, 509.0 ], "width_at_max25_m": 1.5, "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": 86, "stations_resolved": 86, "width_median_m": 8.38, "width_p10_m": 1.12, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.5, "unbounded_share": 0.5, "confidence_median": 0.432, "width_median_bounded_m": 3.0, "window_m": [ 484.0, 509.0 ], "width_at_max25_m": 1.75, "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": "Champier", "county": "Is\u00e8re", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }