{ "ocl_version": "0.1.0", "name": "Col de la Chavade from Lanarce", "slug": "col-de-la-chavade-from-lanarce", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 6.88126304095249, "diagnostic": true, "flags": [], "start_distance_m": 2133.0, "end_distance_m": 2135.0, "start_elevation_m": 1214.02616141242, "end_elevation_m": 1214.163786673239, "min_gradient_pct": -7.608961326843655 }, { "window_m": 3.0, "max_gradient_pct": 6.340667944831087, "diagnostic": true, "flags": [], "start_distance_m": 2133.0, "end_distance_m": 2136.0, "start_elevation_m": 1214.02616141242, "end_elevation_m": 1214.2163814507649, "min_gradient_pct": -6.49898342958295 }, { "window_m": 5.0, "max_gradient_pct": 6.1394004048997886, "diagnostic": false, "flags": [], "start_distance_m": 2126.0, "end_distance_m": 2131.0, "start_elevation_m": 1213.6222503284498, "end_elevation_m": 1213.9292203486948, "min_gradient_pct": -6.506798818090829 }, { "window_m": 10.0, "max_gradient_pct": 5.941311223150478, "diagnostic": false, "flags": [], "start_distance_m": 2126.0, "end_distance_m": 2136.0, "start_elevation_m": 1213.6222503284498, "end_elevation_m": 1214.2163814507649, "min_gradient_pct": -5.817195618199094 }, { "window_m": 20.0, "max_gradient_pct": 5.821371528935515, "diagnostic": false, "flags": [], "start_distance_m": 2115.0, "end_distance_m": 2135.0, "start_elevation_m": 1212.9995123674519, "end_elevation_m": 1214.163786673239, "min_gradient_pct": -4.865463068209692 }, { "window_m": 25.0, "max_gradient_pct": 5.774065030599559, "diagnostic": false, "flags": [], "start_distance_m": 2114.0, "end_distance_m": 2139.0, "start_elevation_m": 1212.9436949529966, "end_elevation_m": 1214.3872112106465, "min_gradient_pct": -4.594423141381412 }, { "window_m": 50.0, "max_gradient_pct": 5.367087271836226, "diagnostic": false, "flags": [], "start_distance_m": 2101.0, "end_distance_m": 2151.0, "start_elevation_m": 1212.315471863113, "end_elevation_m": 1214.9990154990312, "min_gradient_pct": -3.4545682437319556 }, { "window_m": 100.0, "max_gradient_pct": 5.177936578181061, "diagnostic": false, "flags": [], "start_distance_m": 2109.0, "end_distance_m": 2209.0, "start_elevation_m": 1212.693457155259, "end_elevation_m": 1217.87139373344, "min_gradient_pct": -2.8869633465956213 } ], "shape": { "ascent_concentration": 0.428, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 0.0, "shape_class": "sustained" }, "length_m": 3968.9548701008275, "start_elevation_m": 1185.0041322294824, "end_elevation_m": 1266.6146757226431, "endpoint_gain_m": 81.61054349316078, "overall_gradient_pct": 2.05622251106845, "accumulated_ascent_m": 86.58880258616387, "window_maxima": { "max_5m": { "gradient_pct": 6.1394004048997886, "start_distance_m": 2126.0, "end_distance_m": 2131.0, "midpoint_distance_m": 2128.5, "start_elevation_m": 1213.6222503284498, "end_elevation_m": 1213.9292203486948, "start_xy": [ 779911.1291693961, 6401642.974100556 ], "end_xy": [ 779907.4703558082, 6401639.566303154 ] }, "max_10m": { "gradient_pct": 5.941311223150478, "start_distance_m": 2126.0, "end_distance_m": 2136.0, "midpoint_distance_m": 2131.0, "start_elevation_m": 1213.6222503284498, "end_elevation_m": 1214.2163814507649, "start_xy": [ 779911.1291693961, 6401642.974100556 ], "end_xy": [ 779903.8115422201, 6401636.158505754 ] }, "max_20m": { "gradient_pct": 5.821371528935515, "start_distance_m": 2115.0, "end_distance_m": 2135.0, "midpoint_distance_m": 2125.0, "start_elevation_m": 1212.9995123674519, "end_elevation_m": 1214.163786673239, "start_xy": [ 779918.8910944982, 6401650.755368008 ], "end_xy": [ 779904.5433049377, 6401636.840065233 ] }, "max_25m": { "gradient_pct": 5.774065030599559, "start_distance_m": 2114.0, "end_distance_m": 2139.0, "midpoint_distance_m": 2126.5, "start_elevation_m": 1212.9436949529966, "end_elevation_m": 1214.3872112106465, "start_xy": [ 779919.5640255758, 6401651.495073196 ], "end_xy": [ 779901.6162540673, 6401634.113827312 ] }, "max_50m": { "gradient_pct": 5.367087271836226, "start_distance_m": 2101.0, "end_distance_m": 2151.0, "midpoint_distance_m": 2126.0, "start_elevation_m": 1212.315471863113, "end_elevation_m": 1214.9990154990312, "start_xy": [ 779928.2958149635, 6401661.12455587 ], "end_xy": [ 779893.5883718283, 6401625.23870107 ] }, "max_100m": { "gradient_pct": 5.177936578181061, "start_distance_m": 2109.0, "end_distance_m": 2209.0, "midpoint_distance_m": 2159.0, "start_elevation_m": 1212.693457155259, "end_elevation_m": 1217.87139373344, "start_xy": [ 779922.9286809635, 6401655.193599135 ], "end_xy": [ 779873.8519768257, 6401571.730354204 ] } }, "window_minima": { "min_5m": { "gradient_pct": -6.506798818090829, "start_distance_m": 73.0, "end_distance_m": 78.0, "midpoint_distance_m": 75.5, "start_elevation_m": 1183.0145520806307, "end_elevation_m": 1182.6892121397261, "start_xy": [ 779777.9614588935, 6403356.051958048 ], "end_xy": [ 779779.7085229572, 6403351.367113637 ] }, "min_10m": { "gradient_pct": -5.817195618199094, "start_distance_m": 73.0, "end_distance_m": 83.0, "midpoint_distance_m": 78.0, "start_elevation_m": 1183.0145520806307, "end_elevation_m": 1182.4328325188108, "start_xy": [ 779777.9614588935, 6403356.051958048 ], "end_xy": [ 779780.652391112, 6403346.514656719 ] }, "min_20m": { "gradient_pct": -4.865463068209692, "start_distance_m": 66.0, "end_distance_m": 86.0, "midpoint_distance_m": 76.0, "start_elevation_m": 1183.2890290960243, "end_elevation_m": 1182.3159364823823, "start_xy": [ 779773.3006106687, 6403361.153910449 ], "end_xy": [ 779780.8158541102, 6403343.519113388 ] }, "min_25m": { "gradient_pct": -4.594423141381412, "start_distance_m": 63.0, "end_distance_m": 88.0, "midpoint_distance_m": 75.5, "start_elevation_m": 1183.3907057970891, "end_elevation_m": 1182.2421000117438, "start_xy": [ 779771.1347394887, 6403363.229724032 ], "end_xy": [ 779780.5264733557, 6403341.554952702 ] }, "min_50m": { "gradient_pct": -3.4545682437319556, "start_distance_m": 38.0, "end_distance_m": 88.0, "midpoint_distance_m": 63.0, "start_elevation_m": 1183.9693841336098, "end_elevation_m": 1182.2421000117438, "start_xy": [ 779749.2769100524, 6403375.231225713 ], "end_xy": [ 779780.5264733557, 6403341.554952702 ] }, "min_100m": { "gradient_pct": -2.8869633465956213, "start_distance_m": 0.0, "end_distance_m": 100.0, "midpoint_distance_m": 50.0, "start_elevation_m": 1185.0041322294824, "end_elevation_m": 1182.1171688828867, "start_xy": [ 779724.801, 6403402.533 ], "end_xy": [ 779777.8625345333, 6403329.861627595 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 6.88126304095249, "start_distance_m": 2133.0, "end_distance_m": 2135.0, "midpoint_distance_m": 2134.0, "start_elevation_m": 1214.02616141242, "end_elevation_m": 1214.163786673239, "start_xy": [ 779906.006830373, 6401638.203184194 ], "end_xy": [ 779904.5433049377, 6401636.840065233 ] }, "max_3m": { "gradient_pct": 6.340667944831087, "start_distance_m": 2133.0, "end_distance_m": 2136.0, "midpoint_distance_m": 2134.5, "start_elevation_m": 1214.02616141242, "end_elevation_m": 1214.2163814507649, "start_xy": [ 779906.006830373, 6401638.203184194 ], "end_xy": [ 779903.8115422201, 6401636.158505754 ] } }, "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": { "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.001, "obstruction_max_height_m": 7.55, "flagged_windows_m": [] }, "review": [], "extent": [] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "1cc9fdcd6556a02163cb21acb2293cad3067d2a1", "code_git_dirty": "false", "analysis_version": "0.1.0", "analysis_config_digest": "sha256:8c94015b54267da4", "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": "fr-mc6", "road_pbf": "block-batch-fr-mc6.osm.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:af4eae1f5df9e232" }, "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_E779-N6400_0m5@21LHD4MN-2024-12-13.tif", "data/cache/fr/ign-lidarhd_dtm_E779-N6401_0m5@21LHD4MN-2024-12-13.tif", "data/cache/fr/ign-lidarhd_dtm_E779-N6402_0m5@21LHD4MN-2024-12-13.tif", "data/cache/fr/ign-lidarhd_dtm_E779-N6403_0m5@21LHD4MN-2024-12-13.tif", "data/cache/fr/ign-lidarhd_dtm_E780-N6400_0m5@21LHD4MN-2024-12-13.tif", "data/cache/fr/ign-lidarhd_dtm_E780-N6401_0m5@21LHD4MN-2024-12-13.tif", "data/cache/fr/ign-lidarhd_dtm_E780-N6402_0m5@21LHD4MN-2024-12-13.tif" ], "calculated_at": "2026-09-22T18:30:20+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc6.osm.pbf", "osm_snapshot": "", "run_id": "fr-mc6", "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": [ "E779-N6400", "E779-N6401", "E779-N6402", "E779-N6403", "E780-N6400", "E780-N6401", "E780-N6402" ], "elevation_blocks": [ "21LHD4MN@2024-12-13" ], "ign_dalles": [ "LHD_FXX_0779_6401_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0779_6402_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0779_6403_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0779_6404_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0780_6401_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0780_6402_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0780_6403_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD4MN" ], "ign_editions": [ "2024-12-13" ], "ign_dsm_edition": { "LHD_FXX_0779_6401_MNT_O_0M50_LAMB93_IGN69": "2024-12-13", "LHD_FXX_0779_6402_MNT_O_0M50_LAMB93_IGN69": "2024-12-13", "LHD_FXX_0779_6403_MNT_O_0M50_LAMB93_IGN69": "2024-12-13", "LHD_FXX_0779_6404_MNT_O_0M50_LAMB93_IGN69": "2024-12-13", "LHD_FXX_0780_6401_MNT_O_0M50_LAMB93_IGN69": "2024-12-13", "LHD_FXX_0780_6402_MNT_O_0M50_LAMB93_IGN69": "2024-12-13", "LHD_FXX_0780_6403_MNT_O_0M50_LAMB93_IGN69": "2024-12-13" }, "climb_origin": "named-pass", "structure_own_ways": 6, "carriageway": { "stations": 165, "stations_resolved": 165, "width_median_m": 9.0, "width_p10_m": 8.25, "width_min_m": 7.5, "width_max_m": 12.0, "bounded_share": 0.279, "unbounded_share": 0.721, "confidence_median": 0.0, "width_median_bounded_m": 8.75, "window_m": [ 2114.0, 2139.0 ], "width_at_max25_m": 10.75, "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": 165, "stations_resolved": 165, "width_median_m": 11.25, "width_p10_m": 10.25, "width_min_m": 0.75, "width_max_m": 12.0, "bounded_share": 0.23, "unbounded_share": 0.77, "confidence_median": 0.0, "width_median_bounded_m": 10.5, "window_m": [ 2114.0, 2139.0 ], "width_at_max25_m": 12.0, "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": "Lanarce", "county": "Ard\u00e8che", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }