{ "ocl_version": "0.1.0", "name": "Discovered lane (45.2638, 2.4286)", "slug": "discovered-lane-45-2638-2-4286", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 28.53835398570368, "diagnostic": true, "flags": [], "start_distance_m": 294.0, "end_distance_m": 296.0, "start_elevation_m": 691.480174001897, "end_elevation_m": 692.0509410816111, "min_gradient_pct": -2.275230758186808 }, { "window_m": 3.0, "max_gradient_pct": 26.927830611418813, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 301.0, "end_distance_m": 304.0, "start_elevation_m": 693.0373418047794, "end_elevation_m": 693.845176723122, "min_gradient_pct": -1.2340801117526705 }, { "window_m": 5.0, "max_gradient_pct": 23.831838234943916, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 209.0, "end_distance_m": 214.0, "start_elevation_m": 679.308811897881, "end_elevation_m": 680.5004038096282, "min_gradient_pct": 0.21605513640452045 }, { "window_m": 10.0, "max_gradient_pct": 23.650027212249825, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 294.0, "end_distance_m": 304.0, "start_elevation_m": 691.480174001897, "end_elevation_m": 693.845176723122, "min_gradient_pct": 1.1005613671568426 }, { "window_m": 20.0, "max_gradient_pct": 22.46173726001814, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 198.0, "end_distance_m": 218.0, "start_elevation_m": 676.9242132638358, "end_elevation_m": 681.4165607158394, "min_gradient_pct": 1.3113548060744051 }, { "window_m": 25.0, "max_gradient_pct": 22.162779031659284, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 193.0, "end_distance_m": 218.0, "start_elevation_m": 675.8758659579246, "end_elevation_m": 681.4165607158394, "min_gradient_pct": 1.4658218028212104 }, { "window_m": 50.0, "max_gradient_pct": 21.972526298850653, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 168.0, "end_distance_m": 218.0, "start_elevation_m": 670.4302975664141, "end_elevation_m": 681.4165607158394, "min_gradient_pct": 2.2346148698186425 }, { "window_m": 100.0, "max_gradient_pct": 19.36647118784026, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 128.0, "end_distance_m": 228.0, "start_elevation_m": 663.7688935296188, "end_elevation_m": 683.1353647174591, "min_gradient_pct": 5.837765106293432 } ], "shape": { "ascent_concentration": 0.404, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 131.0, "shape_class": "sustained" }, "length_m": 472.76624833480395, "start_elevation_m": 651.7722394333476, "end_elevation_m": 704.3803122099612, "endpoint_gain_m": 52.60807277661354, "overall_gradient_pct": 11.127713317503476, "accumulated_ascent_m": 52.74290125916821, "window_maxima": { "max_5m": { "gradient_pct": 23.831838234943916, "start_distance_m": 209.0, "end_distance_m": 214.0, "midpoint_distance_m": 211.5, "start_elevation_m": 679.308811897881, "end_elevation_m": 680.5004038096282, "start_xy": [ 655157.62425035, 6462911.837864727 ], "end_xy": [ 655162.4333388231, 6462910.469410103 ] }, "max_10m": { "gradient_pct": 23.650027212249825, "start_distance_m": 294.0, "end_distance_m": 304.0, "midpoint_distance_m": 299.0, "start_elevation_m": 691.480174001897, "end_elevation_m": 693.845176723122, "start_xy": [ 655218.4463171634, 6462854.325998874 ], "end_xy": [ 655225.2487510937, 6462846.996135805 ] }, "max_20m": { "gradient_pct": 22.46173726001814, "start_distance_m": 198.0, "end_distance_m": 218.0, "midpoint_distance_m": 208.0, "start_elevation_m": 676.9242132638358, "end_elevation_m": 681.4165607158394, "start_xy": [ 655147.0442557092, 6462914.848464899 ], "end_xy": [ 655165.8434927615, 6462908.4455610635 ] }, "max_25m": { "gradient_pct": 22.162779031659284, "start_distance_m": 193.0, "end_distance_m": 218.0, "midpoint_distance_m": 205.5, "start_elevation_m": 675.8758659579246, "end_elevation_m": 681.4165607158394, "start_xy": [ 655142.235167236, 6462916.216919523 ], "end_xy": [ 655165.8434927615, 6462908.4455610635 ] }, "max_50m": { "gradient_pct": 21.972526298850653, "start_distance_m": 168.0, "end_distance_m": 218.0, "midpoint_distance_m": 193.0, "start_elevation_m": 670.4302975664141, "end_elevation_m": 681.4165607158394, "start_xy": [ 655117.9614146185, 6462922.17892664 ], "end_xy": [ 655165.8434927615, 6462908.4455610635 ] }, "max_100m": { "gradient_pct": 19.36647118784026, "start_distance_m": 128.0, "end_distance_m": 228.0, "midpoint_distance_m": 178.0, "start_elevation_m": 663.7688935296188, "end_elevation_m": 683.1353647174591, "start_xy": [ 655078.2563391249, 6462926.984150339 ], "end_xy": [ 655173.5541935546, 6462902.129533023 ] } }, "window_minima": { "min_5m": { "gradient_pct": 0.21605513640452045, "start_distance_m": 310.0, "end_distance_m": 315.0, "midpoint_distance_m": 312.5, "start_elevation_m": 694.1576176701454, "end_elevation_m": 694.1684204269657, "start_xy": [ 655229.2966969454, 6462842.567475272 ], "end_xy": [ 655232.655128227, 6462838.863296642 ] }, "min_10m": { "gradient_pct": 1.1005613671568426, "start_distance_m": 460.0, "end_distance_m": 470.0, "midpoint_distance_m": 465.0, "start_elevation_m": 704.2245893720793, "end_elevation_m": 704.334645508795, "start_xy": [ 655301.7354813237, 6462726.217712624 ], "end_xy": [ 655302.7778918071, 6462716.272619956 ] }, "min_20m": { "gradient_pct": 1.3113548060744051, "start_distance_m": 450.0, "end_distance_m": 470.0, "midpoint_distance_m": 460.0, "start_elevation_m": 704.0723745475801, "end_elevation_m": 704.334645508795, "start_xy": [ 655300.1482989676, 6462736.090951817 ], "end_xy": [ 655302.7778918071, 6462716.272619956 ] }, "min_25m": { "gradient_pct": 1.4658218028212104, "start_distance_m": 447.0, "end_distance_m": 472.0, "midpoint_distance_m": 459.5, "start_elevation_m": 704.0073680856863, "end_elevation_m": 704.3738235363916, "start_xy": [ 655299.6721442608, 6462739.052923575 ], "end_xy": [ 655302.9833022826, 6462714.283196286 ] }, "min_50m": { "gradient_pct": 2.2346148698186425, "start_distance_m": 422.0, "end_distance_m": 472.0, "midpoint_distance_m": 447.0, "start_elevation_m": 703.2565161014822, "end_elevation_m": 704.3738235363916, "start_xy": [ 655295.9128683755, 6462763.767332349 ], "end_xy": [ 655302.9833022826, 6462714.283196286 ] }, "min_100m": { "gradient_pct": 5.837765106293432, "start_distance_m": 372.0, "end_distance_m": 472.0, "midpoint_distance_m": 422.0, "start_elevation_m": 698.5360584300981, "end_elevation_m": 704.3738235363916, "start_xy": [ 655266.2719866692, 6462793.413891322 ], "end_xy": [ 655302.9833022826, 6462714.283196286 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 28.53835398570368, "start_distance_m": 294.0, "end_distance_m": 296.0, "midpoint_distance_m": 295.0, "start_elevation_m": 691.480174001897, "end_elevation_m": 692.0509410816111, "start_xy": [ 655218.4463171634, 6462854.325998874 ], "end_xy": [ 655219.8068039494, 6462852.860026261 ] }, "max_3m": { "gradient_pct": 26.927830611418813, "start_distance_m": 301.0, "end_distance_m": 304.0, "midpoint_distance_m": 302.5, "start_elevation_m": 693.0373418047794, "end_elevation_m": 693.845176723122, "start_xy": [ 655223.2080209147, 6462849.195094726 ], "end_xy": [ 655225.2487510937, 6462846.996135805 ] } }, "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": 0.378, "obstruction_max_height_m": 17.74, "flagged_windows_m": [ 3, 5, 10, 20, 25, 50, 100 ] }, "review": [], "extent": [ "may_start_earlier" ] }, "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-mc3", "road_pbf": "block-batch-fr-mc3.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_E654-N6462_0m5@22LHD3KM-2025-09-17.tif", "data/cache/fr/ign-lidarhd_dtm_E655-N6462_0m5@22LHD3KM-2025-09-17.tif" ], "calculated_at": "2026-09-22T16:59:59+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc3.osm.pbf", "osm_snapshot": "", "run_id": "fr-mc3", "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": [ "E654-N6462", "E655-N6462" ], "elevation_blocks": [ "22LHD3KM@2025-09-17" ], "ign_dalles": [ "LHD_FXX_0654_6463_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0655_6463_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD3KM" ], "ign_editions": [ "2025-09-17" ], "ign_dsm_edition": { "LHD_FXX_0654_6463_MNT_O_0M50_LAMB93_IGN69": "2025-09-17", "LHD_FXX_0655_6463_MNT_O_0M50_LAMB93_IGN69": "2025-09-17" }, "climb_origin": "discovered", "structure_own_ways": 2, "carriageway": { "stations": 25, "stations_resolved": 25, "width_median_m": 4.5, "width_p10_m": 3.3, "width_min_m": 2.0, "width_max_m": 9.75, "bounded_share": 0.36, "unbounded_share": 0.64, "confidence_median": 0.0, "width_median_bounded_m": 4.5, "window_m": [ 193.0, 218.0 ], "width_at_max25_m": 4.5, "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": 2.75, "width_p10_m": 0.5, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.92, "unbounded_share": 0.08, "confidence_median": 1.0, "width_median_bounded_m": 2.75, "window_m": [ 193.0, 218.0 ], "width_at_max25_m": 1.0, "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": "M\u00e9allet", "county": "Cantal", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }