{ "ocl_version": "0.1.0", "name": "Chemin des Combes", "slug": "chemin-des-combes", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 24.207993494493962, "diagnostic": true, "flags": [], "start_distance_m": 304.0, "end_distance_m": 306.0, "start_elevation_m": 480.8665568138742, "end_elevation_m": 481.35071668376406, "min_gradient_pct": -6.013253938311891 }, { "window_m": 3.0, "max_gradient_pct": 23.465547454924263, "diagnostic": true, "flags": [], "start_distance_m": 304.0, "end_distance_m": 307.0, "start_elevation_m": 480.8665568138742, "end_elevation_m": 481.5705232375219, "min_gradient_pct": -4.6240382487667375 }, { "window_m": 5.0, "max_gradient_pct": 22.757233638374146, "diagnostic": false, "flags": [], "start_distance_m": 303.0, "end_distance_m": 308.0, "start_elevation_m": 480.64929155142033, "end_elevation_m": 481.78715323333904, "min_gradient_pct": -0.7126595031206762 }, { "window_m": 10.0, "max_gradient_pct": 21.51969192346087, "diagnostic": false, "flags": [], "start_distance_m": 300.0, "end_distance_m": 310.0, "start_elevation_m": 480.04217103833514, "end_elevation_m": 482.1941402306812, "min_gradient_pct": 0.04178865195854087 }, { "window_m": 20.0, "max_gradient_pct": 20.84803197855507, "diagnostic": false, "flags": [], "start_distance_m": 227.0, "end_distance_m": 247.0, "start_elevation_m": 466.3073641117633, "end_elevation_m": 470.47697050747433, "min_gradient_pct": 0.6909647112362904 }, { "window_m": 25.0, "max_gradient_pct": 20.512275677134767, "diagnostic": false, "flags": [], "start_distance_m": 226.0, "end_distance_m": 251.0, "start_elevation_m": 466.11171475283123, "end_elevation_m": 471.2397836721149, "min_gradient_pct": 0.901826610014723 }, { "window_m": 50.0, "max_gradient_pct": 19.07662277058705, "diagnostic": false, "flags": [], "start_distance_m": 220.0, "end_distance_m": 270.0, "start_elevation_m": 465.0717543838608, "end_elevation_m": 474.61006576915435, "min_gradient_pct": 2.9331758847379206 }, { "window_m": 100.0, "max_gradient_pct": 18.843675684828213, "diagnostic": false, "flags": [], "start_distance_m": 212.0, "end_distance_m": 312.0, "start_elevation_m": 463.71608734745325, "end_elevation_m": 482.55976303228147, "min_gradient_pct": 5.3219938903691855 } ], "shape": { "ascent_concentration": 0.362, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 196.0, "shape_class": "sustained" }, "length_m": 315.2914104241471, "start_elevation_m": 441.4251760502934, "end_elevation_m": 482.8844841076136, "endpoint_gain_m": 41.45930805732024, "overall_gradient_pct": 13.149520312509285, "accumulated_ascent_m": 41.645265462646194, "window_maxima": { "max_5m": { "gradient_pct": 22.757233638374146, "start_distance_m": 303.0, "end_distance_m": 308.0, "midpoint_distance_m": 305.5, "start_elevation_m": 480.64929155142033, "end_elevation_m": 481.78715323333904, "start_xy": [ 713946.2918852506, 6507477.515647008 ], "end_xy": [ 713949.8916001914, 6507474.0454809675 ] }, "max_10m": { "gradient_pct": 21.51969192346087, "start_distance_m": 300.0, "end_distance_m": 310.0, "midpoint_distance_m": 305.0, "start_elevation_m": 480.04217103833514, "end_elevation_m": 482.1941402306812, "start_xy": [ 713944.1320562861, 6507479.597746632 ], "end_xy": [ 713951.3314861676, 6507472.657414552 ] }, "max_20m": { "gradient_pct": 20.84803197855507, "start_distance_m": 227.0, "end_distance_m": 247.0, "midpoint_distance_m": 237.0, "start_elevation_m": 466.3073641117633, "end_elevation_m": 470.47697050747433, "start_xy": [ 713887.2421610786, 6507523.974345392 ], "end_xy": [ 713905.4384058351, 6507515.799499768 ] }, "max_25m": { "gradient_pct": 20.512275677134767, "start_distance_m": 226.0, "end_distance_m": 251.0, "midpoint_distance_m": 238.5, "start_elevation_m": 466.11171475283123, "end_elevation_m": 471.2397836721149, "start_xy": [ 713886.323103347, 6507524.368468325 ], "end_xy": [ 713908.4384597219, 6507513.1538095595 ] }, "max_50m": { "gradient_pct": 19.07662277058705, "start_distance_m": 220.0, "end_distance_m": 270.0, "midpoint_distance_m": 245.0, "start_elevation_m": 465.0717543838608, "end_elevation_m": 474.61006576915435, "start_xy": [ 713880.8087569576, 6507526.73320592 ], "end_xy": [ 713922.5337666416, 6507500.418742872 ] }, "max_100m": { "gradient_pct": 18.843675684828213, "start_distance_m": 212.0, "end_distance_m": 312.0, "midpoint_distance_m": 262.0, "start_elevation_m": 463.71608734745325, "end_elevation_m": 482.55976303228147, "start_xy": [ 713873.456295105, 6507529.886189382 ], "end_xy": [ 713952.771372144, 6507471.269348136 ] } }, "window_minima": { "min_5m": { "gradient_pct": -0.7126595031206762, "start_distance_m": 30.0, "end_distance_m": 35.0, "midpoint_distance_m": 32.5, "start_elevation_m": 446.2938128368043, "end_elevation_m": 446.2581798616483, "start_xy": [ 713793.2825448173, 6507610.369850615 ], "end_xy": [ 713796.5136727144, 6507610.415251855 ] }, "min_10m": { "gradient_pct": 0.04178865195854087, "start_distance_m": 98.0, "end_distance_m": 108.0, "midpoint_distance_m": 103.0, "start_elevation_m": 450.25371180054935, "end_elevation_m": 450.2578906657452, "start_xy": [ 713799.3967598069, 6507565.636335839 ], "end_xy": [ 713793.1552565215, 6507557.823293874 ] }, "min_20m": { "gradient_pct": 0.6909647112362904, "start_distance_m": 96.0, "end_distance_m": 116.0, "midpoint_distance_m": 106.0, "start_elevation_m": 450.2093119648062, "end_elevation_m": 450.34750490705346, "start_xy": [ 713800.6464043589, 6507567.197869858 ], "end_xy": [ 713788.1629255097, 6507551.572163491 ] }, "min_25m": { "gradient_pct": 0.901826610014723, "start_distance_m": 91.0, "end_distance_m": 116.0, "midpoint_distance_m": 103.5, "start_elevation_m": 450.1220482545498, "end_elevation_m": 450.34750490705346, "start_xy": [ 713803.7705157389, 6507571.101704906 ], "end_xy": [ 713788.1629255097, 6507551.572163491 ] }, "min_50m": { "gradient_pct": 2.9331758847379206, "start_distance_m": 74.0, "end_distance_m": 124.0, "midpoint_distance_m": 99.0, "start_elevation_m": 449.38247228609544, "end_elevation_m": 450.8490602284644, "start_xy": [ 713814.3924944308, 6507584.374744071 ], "end_xy": [ 713787.9134356873, 6507543.73975561 ] }, "min_100m": { "gradient_pct": 5.3219938903691855, "start_distance_m": 29.0, "end_distance_m": 129.0, "midpoint_distance_m": 79.0, "start_elevation_m": 446.19515252378204, "end_elevation_m": 451.5171464141512, "start_xy": [ 713792.4857677711, 6507609.765577218 ], "end_xy": [ 713792.6092031914, 6507542.725484081 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 24.207993494493962, "start_distance_m": 304.0, "end_distance_m": 306.0, "midpoint_distance_m": 305.0, "start_elevation_m": 480.8665568138742, "end_elevation_m": 481.35071668376406, "start_xy": [ 713947.0118282387, 6507476.8216138 ], "end_xy": [ 713948.4517142151, 6507475.433547384 ] }, "max_3m": { "gradient_pct": 23.465547454924263, "start_distance_m": 304.0, "end_distance_m": 307.0, "midpoint_distance_m": 305.5, "start_elevation_m": 480.8665568138742, "end_elevation_m": 481.5705232375219, "start_xy": [ 713947.0118282387, 6507476.8216138 ], "end_xy": [ 713949.1716572032, 6507474.739514176 ] } }, "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": 0.0, "obstruction_max_height_m": 0.0, "flagged_windows_m": [] }, "review": [], "extent": [ "may_start_earlier", "may_continue_beyond_end" ] }, "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-mc5", "road_pbf": "block-batch-fr-mc5.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_E713-N6507_0m5@22LHD4LL-2025-07-24.tif" ], "calculated_at": "2026-09-22T17:46:50+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc5.osm.pbf", "osm_snapshot": "", "run_id": "fr-mc5", "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": [ "E713-N6507" ], "elevation_blocks": [ "22LHD4LL@2025-07-24" ], "ign_dalles": [ "LHD_FXX_0713_6508_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD4LL" ], "ign_editions": [ "2025-07-24" ], "ign_dsm_edition": { "LHD_FXX_0713_6508_MNT_O_0M50_LAMB93_IGN69": "2025-07-24" }, "climb_origin": "discovered", "structure_own_ways": 3, "carriageway": { "stations": 19, "stations_resolved": 19, "width_median_m": 6.25, "width_p10_m": 4.45, "width_min_m": 4.0, "width_max_m": 10.25, "bounded_share": 0.053, "unbounded_share": 0.947, "confidence_median": 0.0, "width_median_bounded_m": 4.75, "window_m": [ 226.0, 251.0 ], "width_at_max25_m": 7.0, "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": 19, "stations_resolved": 19, "width_median_m": 7.5, "width_p10_m": 4.9, "width_min_m": 4.0, "width_max_m": 12.0, "bounded_share": 0.737, "unbounded_share": 0.263, "confidence_median": 1.0, "width_median_bounded_m": 7.0, "window_m": [ 226.0, 251.0 ], "width_at_max25_m": 7.5, "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": "Veyre-Monton", "county": "Puy-de-D\u00f4me", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }