{ "ocl_version": "0.1.0", "name": "Chemin Bourrugou", "slug": "chemin-bourrugou", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 27.765135899696247, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 205.0, "end_distance_m": 207.0, "start_elevation_m": 316.5828262422437, "end_elevation_m": 317.1381289602376, "min_gradient_pct": -13.242111153834912 }, { "window_m": 3.0, "max_gradient_pct": 25.223703805761488, "diagnostic": true, "flags": [], "start_distance_m": 178.0, "end_distance_m": 181.0, "start_elevation_m": 312.00287879913884, "end_elevation_m": 312.7595899133117, "min_gradient_pct": -5.203746272356587 }, { "window_m": 5.0, "max_gradient_pct": 23.60460216147885, "diagnostic": false, "flags": [], "start_distance_m": 176.0, "end_distance_m": 181.0, "start_elevation_m": 311.57935980523774, "end_elevation_m": 312.7595899133117, "min_gradient_pct": -1.3076137964458212 }, { "window_m": 10.0, "max_gradient_pct": 21.917963382058474, "diagnostic": false, "flags": [], "start_distance_m": 171.0, "end_distance_m": 181.0, "start_elevation_m": 310.56779357510584, "end_elevation_m": 312.7595899133117, "min_gradient_pct": 1.2260518323301994 }, { "window_m": 20.0, "max_gradient_pct": 21.202203791146985, "diagnostic": false, "flags": [], "start_distance_m": 162.0, "end_distance_m": 182.0, "start_elevation_m": 308.7130463335687, "end_elevation_m": 312.9534870917981, "min_gradient_pct": 3.8037098760310073 }, { "window_m": 25.0, "max_gradient_pct": 20.6324398108261, "diagnostic": false, "flags": [], "start_distance_m": 158.0, "end_distance_m": 183.0, "start_elevation_m": 307.9848781929881, "end_elevation_m": 313.14298814569463, "min_gradient_pct": 4.674792469160366 }, { "window_m": 50.0, "max_gradient_pct": 20.25490052734915, "diagnostic": false, "flags": [], "start_distance_m": 132.0, "end_distance_m": 182.0, "start_elevation_m": 302.8260368281235, "end_elevation_m": 312.9534870917981, "min_gradient_pct": 8.749729109034774 }, { "window_m": 100.0, "max_gradient_pct": 19.123979971670394, "diagnostic": false, "flags": [], "start_distance_m": 85.0, "end_distance_m": 185.0, "start_elevation_m": 294.3703681983492, "end_elevation_m": 313.4943481700196, "min_gradient_pct": 10.503533749052735 } ], "shape": { "ascent_concentration": 0.333, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 246.0, "shape_class": "sustained" }, "length_m": 466.9999999999876, "start_elevation_m": 283.3749736347627, "end_elevation_m": 349.0576583917509, "endpoint_gain_m": 65.68268475698824, "overall_gradient_pct": 14.064814723124194, "accumulated_ascent_m": 66.00337046981889, "window_maxima": { "max_5m": { "gradient_pct": 23.60460216147885, "start_distance_m": 176.0, "end_distance_m": 181.0, "midpoint_distance_m": 178.5, "start_elevation_m": 311.57935980523774, "end_elevation_m": 312.7595899133117, "start_xy": [ 419095.47731253545, 6243807.938139066 ], "end_xy": [ 419100.2197328745, 6243806.3540149145 ] }, "max_10m": { "gradient_pct": 21.917963382058474, "start_distance_m": 171.0, "end_distance_m": 181.0, "midpoint_distance_m": 176.0, "start_elevation_m": 310.56779357510584, "end_elevation_m": 312.7595899133117, "start_xy": [ 419090.73489219643, 6243809.522263218 ], "end_xy": [ 419100.2197328745, 6243806.3540149145 ] }, "max_20m": { "gradient_pct": 21.202203791146985, "start_distance_m": 162.0, "end_distance_m": 182.0, "midpoint_distance_m": 172.0, "start_elevation_m": 308.7130463335687, "end_elevation_m": 312.9534870917981, "start_xy": [ 419082.07169757783, 6243811.165483341 ], "end_xy": [ 419101.1682169423, 6243806.037190083 ] }, "max_25m": { "gradient_pct": 20.6324398108261, "start_distance_m": 158.0, "end_distance_m": 183.0, "midpoint_distance_m": 170.5, "start_elevation_m": 307.9848781929881, "end_elevation_m": 313.14298814569463, "start_xy": [ 419078.09729187377, 6243810.713709836 ], "end_xy": [ 419102.1167010101, 6243805.720365253 ] }, "max_50m": { "gradient_pct": 20.25490052734915, "start_distance_m": 132.0, "end_distance_m": 182.0, "midpoint_distance_m": 157.0, "start_elevation_m": 302.8260368281235, "end_elevation_m": 312.9534870917981, "start_xy": [ 419052.277377417, 6243807.726364411 ], "end_xy": [ 419101.1682169423, 6243806.037190083 ] }, "max_100m": { "gradient_pct": 19.123979971670394, "start_distance_m": 85.0, "end_distance_m": 185.0, "midpoint_distance_m": 135.0, "start_elevation_m": 294.3703681983492, "end_elevation_m": 313.4943481700196, "start_xy": [ 419011.4170010822, 6243785.319775266 ], "end_xy": [ 419104.0136691457, 6243805.086715593 ] } }, "window_minima": { "min_5m": { "gradient_pct": -1.3076137964458212, "start_distance_m": 7.0, "end_distance_m": 12.0, "midpoint_distance_m": 9.5, "start_elevation_m": 283.5694838433836, "end_elevation_m": 283.5041031535613, "start_xy": [ 418960.5179527587, 6243727.067873206 ], "end_xy": [ 418964.5007761578, 6243730.090639782 ] }, "min_10m": { "gradient_pct": 1.2260518323301994, "start_distance_m": 2.0, "end_distance_m": 12.0, "midpoint_distance_m": 7.0, "start_elevation_m": 283.38149797032827, "end_elevation_m": 283.5041031535613, "start_xy": [ 418956.53512935963, 6243724.045106631 ], "end_xy": [ 418964.5007761578, 6243730.090639782 ] }, "min_20m": { "gradient_pct": 3.8037098760310073, "start_distance_m": 446.0, "end_distance_m": 466.0, "midpoint_distance_m": 456.0, "start_elevation_m": 348.21390182859767, "end_elevation_m": 348.9746438038039, "start_xy": [ 419343.6315915308, 6243882.415823701 ], "end_xy": [ 419363.04919030995, 6243878.058644547 ] }, "min_25m": { "gradient_pct": 4.674792469160366, "start_distance_m": 442.0, "end_distance_m": 467.0, "midpoint_distance_m": 454.5, "start_elevation_m": 347.8889602744608, "end_elevation_m": 349.0576583917509, "start_xy": [ 419339.8021486164, 6243883.5714044925 ], "end_xy": [ 419364.04574298713, 6243877.975682137 ] }, "min_50m": { "gradient_pct": 8.749729109034774, "start_distance_m": 417.0, "end_distance_m": 467.0, "midpoint_distance_m": 442.0, "start_elevation_m": 344.68279383723353, "end_elevation_m": 349.0576583917509, "start_xy": [ 419316.1236546849, 6243882.399278841 ], "end_xy": [ 419364.04574298713, 6243877.975682137 ] }, "min_100m": { "gradient_pct": 10.503533749052735, "start_distance_m": 207.0, "end_distance_m": 307.0, "midpoint_distance_m": 257.0, "start_elevation_m": 317.1381289602376, "end_elevation_m": 327.64166270929036, "start_xy": [ 419125.4044595929, 6243800.827678559 ], "end_xy": [ 419218.9189893114, 6243834.132750656 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 27.765135899696247, "start_distance_m": 205.0, "end_distance_m": 207.0, "midpoint_distance_m": 206.0, "start_elevation_m": 316.5828262422437, "end_elevation_m": 317.1381289602376, "start_xy": [ 419123.40800706745, 6243800.946747085 ], "end_xy": [ 419125.4044595929, 6243800.827678559 ] }, "max_3m": { "gradient_pct": 25.223703805761488, "start_distance_m": 178.0, "end_distance_m": 181.0, "midpoint_distance_m": 179.5, "start_elevation_m": 312.00287879913884, "end_elevation_m": 312.7595899133117, "start_xy": [ 419097.37428067107, 6243807.304489405 ], "end_xy": [ 419100.2197328745, 6243806.3540149145 ] } }, "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": 0.265, "obstruction_max_height_m": 14.48, "flagged_windows_m": [ 2 ] }, "review": [], "extent": [] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "06fa4c370391597f015858e97dcf01ca2f5b3640", "code_git_dirty": "false", "analysis_version": "0.1.0", "analysis_config_digest": "sha256:0048c2bbb24ab95e", "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-pyr1", "road_pbf": "block-batch-fr-pyr1.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:c54ac68b3f57b41b" }, "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_E418-N6243_0m5@21LHD1FQ-2025-09-15.tif", "data/cache/fr/ign-lidarhd_dtm_E419-N6243_0m5@21LHD1FQ-2025-09-15.tif" ], "calculated_at": "2026-09-20T06:49:32+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr1.osm.pbf", "osm_snapshot": "", "run_id": "fr-pyr1", "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": [ "E418-N6243", "E419-N6243" ], "elevation_blocks": [ "21LHD1FQ@2025-09-15" ], "ign_dalles": [ "LHD_FXX_0418_6244_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0419_6244_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD1FQ" ], "ign_editions": [ "2025-09-15" ], "ign_dsm_edition": { "LHD_FXX_0418_6244_MNT_O_0M50_LAMB93_IGN69": "2025-09-15", "LHD_FXX_0419_6244_MNT_O_0M50_LAMB93_IGN69": "2025-09-15" }, "route_summit_trim_m": 80.9, "route_summit_trim_loss_m": 6.2, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 25, "stations_resolved": 25, "width_median_m": 4.25, "width_p10_m": 2.75, "width_min_m": 2.0, "width_max_m": 9.25, "bounded_share": 0.48, "unbounded_share": 0.52, "confidence_median": 0.0, "width_median_bounded_m": 3.12, "window_m": [ 158.0, 183.0 ], "width_at_max25_m": 6.5, "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": 25, "stations_resolved": 25, "width_median_m": 8.25, "width_p10_m": 1.85, "width_min_m": 1.0, "width_max_m": 12.0, "bounded_share": 0.52, "unbounded_share": 0.48, "confidence_median": 0.906, "width_median_bounded_m": 3.5, "window_m": [ 158.0, 183.0 ], "width_at_max25_m": 9.0, "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": "Lasseube", "county": "Pyr\u00e9n\u00e9es-Atlantiques", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }