{ "ocl_version": "0.1.0", "name": "Chemin du Cr\u00eat du Loup", "slug": "chemin-du-cret-du-loup", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 23.69636946857554, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 269.0, "end_distance_m": 271.0, "start_elevation_m": 616.9483899132157, "end_elevation_m": 617.4223173025872, "min_gradient_pct": 8.24722856911535 }, { "window_m": 3.0, "max_gradient_pct": 23.26281989120389, "diagnostic": true, "flags": [], "start_distance_m": 245.0, "end_distance_m": 248.0, "start_elevation_m": 612.1727385548292, "end_elevation_m": 612.8706231515653, "min_gradient_pct": 7.98818965040861 }, { "window_m": 5.0, "max_gradient_pct": 23.039394029208324, "diagnostic": false, "flags": [], "start_distance_m": 242.0, "end_distance_m": 247.0, "start_elevation_m": 611.49438241603, "end_elevation_m": 612.6463521174904, "min_gradient_pct": 8.398654127420286 }, { "window_m": 10.0, "max_gradient_pct": 22.529241622133895, "diagnostic": false, "flags": [], "start_distance_m": 239.0, "end_distance_m": 249.0, "start_elevation_m": 610.8279221619099, "end_elevation_m": 613.0808463241233, "min_gradient_pct": 9.136406882058736 }, { "window_m": 20.0, "max_gradient_pct": 21.724134053308717, "diagnostic": false, "flags": [], "start_distance_m": 236.0, "end_distance_m": 256.0, "start_elevation_m": 610.2053236455206, "end_elevation_m": 614.5501504561823, "min_gradient_pct": 9.488082513710197 }, { "window_m": 25.0, "max_gradient_pct": 21.23954822266569, "diagnostic": false, "flags": [], "start_distance_m": 234.0, "end_distance_m": 259.0, "start_elevation_m": 609.8110356331788, "end_elevation_m": 615.1209226888452, "min_gradient_pct": 9.514051056924473 }, { "window_m": 50.0, "max_gradient_pct": 20.225777132165376, "diagnostic": false, "flags": [], "start_distance_m": 230.0, "end_distance_m": 280.0, "start_elevation_m": 609.1020926471487, "end_elevation_m": 619.2149812132313, "min_gradient_pct": 11.015899814896557 }, { "window_m": 100.0, "max_gradient_pct": 18.44554547970222, "diagnostic": false, "flags": [], "start_distance_m": 185.0, "end_distance_m": 285.0, "start_elevation_m": 601.6141975895022, "end_elevation_m": 620.0597430692044, "min_gradient_pct": 12.732964881523685 } ], "shape": { "ascent_concentration": 0.293, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 371.0, "shape_class": "sustained" }, "length_m": 390.0244532299257, "start_elevation_m": 575.7528177773402, "end_elevation_m": 637.6024046508451, "endpoint_gain_m": 61.849586873504904, "overall_gradient_pct": 15.857874131046746, "accumulated_ascent_m": 61.849586873504904, "window_maxima": { "max_5m": { "gradient_pct": 23.039394029208324, "start_distance_m": 242.0, "end_distance_m": 247.0, "midpoint_distance_m": 244.5, "start_elevation_m": 611.49438241603, "end_elevation_m": 612.6463521174904, "start_xy": [ 809827.9516586048, 6480076.306966774 ], "end_xy": [ 809832.4503099852, 6480074.124734945 ] }, "max_10m": { "gradient_pct": 22.529241622133895, "start_distance_m": 239.0, "end_distance_m": 249.0, "midpoint_distance_m": 244.0, "start_elevation_m": 610.8279221619099, "end_elevation_m": 613.0808463241233, "start_xy": [ 809825.2524677765, 6480077.616305871 ], "end_xy": [ 809834.2497705374, 6480073.251842213 ] }, "max_20m": { "gradient_pct": 21.724134053308717, "start_distance_m": 236.0, "end_distance_m": 256.0, "midpoint_distance_m": 246.0, "start_elevation_m": 610.2053236455206, "end_elevation_m": 614.5501504561823, "start_xy": [ 809822.8363779944, 6480079.346136493 ], "end_xy": [ 809839.9077173728, 6480069.365354796 ] }, "max_25m": { "gradient_pct": 21.23954822266569, "start_distance_m": 234.0, "end_distance_m": 259.0, "midpoint_distance_m": 246.5, "start_elevation_m": 609.8110356331788, "end_elevation_m": 615.1209226888452, "start_xy": [ 809821.3506588554, 6480080.685031052 ], "end_xy": [ 809841.8633560715, 6480067.0903872615 ] }, "max_50m": { "gradient_pct": 20.225777132165376, "start_distance_m": 230.0, "end_distance_m": 280.0, "midpoint_distance_m": 255.0, "start_elevation_m": 609.1020926471487, "end_elevation_m": 619.2149812132313, "start_xy": [ 809818.3792205773, 6480083.362820169 ], "end_xy": [ 809831.242998139, 6480051.034406393 ] }, "max_100m": { "gradient_pct": 18.44554547970222, "start_distance_m": 185.0, "end_distance_m": 285.0, "midpoint_distance_m": 235.0, "start_elevation_m": 601.6141975895022, "end_elevation_m": 620.0597430692044, "start_xy": [ 809781.2966224159, 6480108.51221465 ], "end_xy": [ 809827.7615904055, 6480047.4455625415 ] } }, "window_minima": { "min_5m": { "gradient_pct": 8.398654127420286, "start_distance_m": 0.0, "end_distance_m": 5.0, "midpoint_distance_m": 2.5, "start_elevation_m": 575.7528177773402, "end_elevation_m": 576.1727504837112, "start_xy": [ 809628.192, 6480205.666 ], "end_xy": [ 809633.0868288236, 6480204.645877073 ] }, "min_10m": { "gradient_pct": 9.136406882058736, "start_distance_m": 0.0, "end_distance_m": 10.0, "midpoint_distance_m": 5.0, "start_elevation_m": 575.7528177773402, "end_elevation_m": 576.666458465546, "start_xy": [ 809628.192, 6480205.666 ], "end_xy": [ 809637.9816576472, 6480203.625754144 ] }, "min_20m": { "gradient_pct": 9.488082513710197, "start_distance_m": 0.0, "end_distance_m": 20.0, "midpoint_distance_m": 10.0, "start_elevation_m": 575.7528177773402, "end_elevation_m": 577.6504342800822, "start_xy": [ 809628.192, 6480205.666 ], "end_xy": [ 809647.3658190714, 6480200.196690424 ] }, "min_25m": { "gradient_pct": 9.514051056924473, "start_distance_m": 0.0, "end_distance_m": 25.0, "midpoint_distance_m": 12.5, "start_elevation_m": 575.7528177773402, "end_elevation_m": 578.1313305415713, "start_xy": [ 809628.192, 6480205.666 ], "end_xy": [ 809652.0405586062, 6480198.422765318 ] }, "min_50m": { "gradient_pct": 11.015899814896557, "start_distance_m": 0.0, "end_distance_m": 50.0, "midpoint_distance_m": 25.0, "start_elevation_m": 575.7528177773402, "end_elevation_m": 581.2607676847884, "start_xy": [ 809628.192, 6480205.666 ], "end_xy": [ 809675.0354323734, 6480188.780020665 ] }, "min_100m": { "gradient_pct": 12.732964881523685, "start_distance_m": 0.0, "end_distance_m": 100.0, "midpoint_distance_m": 50.0, "start_elevation_m": 575.7528177773402, "end_elevation_m": 588.4857826588639, "start_xy": [ 809628.192, 6480205.666 ], "end_xy": [ 809716.1159980174, 6480160.477130723 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 23.69636946857554, "start_distance_m": 269.0, "end_distance_m": 271.0, "midpoint_distance_m": 270.0, "start_elevation_m": 616.9483899132157, "end_elevation_m": 617.4223173025872, "start_xy": [ 809838.9020951526, 6480058.929862867 ], "end_xy": [ 809837.5095320592, 6480057.494325327 ] }, "max_3m": { "gradient_pct": 23.26281989120389, "start_distance_m": 245.0, "end_distance_m": 248.0, "midpoint_distance_m": 246.5, "start_elevation_m": 612.1727385548292, "end_elevation_m": 612.8706231515653, "start_xy": [ 809830.650849433, 6480074.997627676 ], "end_xy": [ 809833.3500402613, 6480073.688288579 ] } }, "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": 0.122, "obstruction_max_height_m": 15.73, "flagged_windows_m": [ 2 ] }, "review": [], "extent": [ "may_start_earlier", "may_continue_beyond_end" ] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "076a8e7f889cfb3c2cf6b3de65a6030c7155b1f0", "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-mc7", "road_pbf": "block-batch-fr-mc7.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_E809-N6479_0m5@22LHD5NM-2025-02-27.tif", "data/cache/fr/ign-lidarhd_dtm_E809-N6480_0m5@22LHD5NM-2025-02-27.tif" ], "calculated_at": "2026-09-22T13:08:31+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc7.osm.pbf", "osm_snapshot": "", "run_id": "fr-mc7", "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": [ "E809-N6479", "E809-N6480" ], "elevation_blocks": [ "22LHD5NM@2025-02-27" ], "ign_dalles": [ "LHD_FXX_0809_6480_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0809_6481_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD5NM" ], "ign_editions": [ "2025-02-27" ], "ign_dsm_edition": { "LHD_FXX_0809_6480_MNT_O_0M50_LAMB93_IGN69": "2025-02-27", "LHD_FXX_0809_6481_MNT_O_0M50_LAMB93_IGN69": "2025-02-27" }, "climb_origin": "discovered", "structure_own_ways": 2, "carriageway": { "stations": 22, "stations_resolved": 22, "width_median_m": 6.88, "width_p10_m": 5.0, "width_min_m": 4.75, "width_max_m": 11.5, "bounded_share": 0.227, "unbounded_share": 0.773, "confidence_median": 0.0, "width_median_bounded_m": 5.25, "window_m": [ 234.0, 259.0 ], "width_at_max25_m": 9.5, "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": 22, "stations_resolved": 22, "width_median_m": 7.75, "width_p10_m": 3.27, "width_min_m": 0.5, "width_max_m": 11.75, "bounded_share": 0.636, "unbounded_share": 0.364, "confidence_median": 0.959, "width_median_bounded_m": 5.88, "window_m": [ 234.0, 259.0 ], "width_at_max25_m": 10.75, "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": "Saint-\u00c9tienne", "county": "Loire", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }