{ "ocl_version": "0.1.0", "name": "Chemin du Froissard", "slug": "chemin-du-froissard", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 24.685238617001914, "diagnostic": true, "flags": [ "texture_excluded" ], "start_distance_m": 44.0, "end_distance_m": 46.0, "start_elevation_m": 417.5038372266447, "end_elevation_m": 417.99754199898473, "min_gradient_pct": -3.181526826531922, "suppressed_max_gradient_pct": 55.00150393885406, "suppressed_location_m": [ 18.0, 20.0 ] }, { "window_m": 3.0, "max_gradient_pct": 23.97275788407948, "diagnostic": true, "flags": [ "texture_excluded" ], "start_distance_m": 441.0, "end_distance_m": 444.0, "start_elevation_m": 468.80349750401746, "end_elevation_m": 469.52268024053984, "min_gradient_pct": -3.008426516881476, "suppressed_max_gradient_pct": 53.62232606983449, "suppressed_location_m": [ 18.0, 21.0 ] }, { "window_m": 5.0, "max_gradient_pct": 23.785898546769886, "diagnostic": false, "flags": [ "texture_excluded" ], "start_distance_m": 441.0, "end_distance_m": 446.0, "start_elevation_m": 468.80349750401746, "end_elevation_m": 469.99279243135595, "min_gradient_pct": -2.9878915521703675, "suppressed_max_gradient_pct": 44.30511616262834, "suppressed_location_m": [ 17.0, 22.0 ] }, { "window_m": 10.0, "max_gradient_pct": 23.540386631134425, "diagnostic": false, "flags": [ "texture_excluded" ], "start_distance_m": 452.0, "end_distance_m": 462.0, "start_elevation_m": 471.36239936554273, "end_elevation_m": 473.71643802865617, "min_gradient_pct": -2.735281589012857, "suppressed_max_gradient_pct": 30.21065721563218, "suppressed_location_m": [ 13.0, 23.0 ] }, { "window_m": 20.0, "max_gradient_pct": 23.379327680536903, "diagnostic": false, "flags": [], "start_distance_m": 441.0, "end_distance_m": 461.0, "start_elevation_m": 468.80349750401746, "end_elevation_m": 473.47936304012484, "min_gradient_pct": -2.4237294362367834 }, { "window_m": 25.0, "max_gradient_pct": 23.266944259135926, "diagnostic": false, "flags": [], "start_distance_m": 441.0, "end_distance_m": 466.0, "start_elevation_m": 468.80349750401746, "end_elevation_m": 474.62023356880144, "min_gradient_pct": -2.286822891602924 }, { "window_m": 50.0, "max_gradient_pct": 22.33103212563924, "diagnostic": false, "flags": [], "start_distance_m": 419.0, "end_distance_m": 469.0, "start_elevation_m": 464.1117712732435, "end_elevation_m": 475.2772873360631, "min_gradient_pct": -1.656143198575478 }, { "window_m": 100.0, "max_gradient_pct": 20.666124260773305, "diagnostic": false, "flags": [], "start_distance_m": 381.0, "end_distance_m": 481.0, "start_elevation_m": 456.8055977158425, "end_elevation_m": 477.4717219766158, "min_gradient_pct": -0.7197513433434892 } ], "shape": { "ascent_concentration": 0.612, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 262.0, "shape_class": "stepped" }, "length_m": 2603.714618812172, "start_elevation_m": 409.959202401368, "end_elevation_m": 532.5606404345784, "endpoint_gain_m": 122.60143803321046, "overall_gradient_pct": 4.708712588829795, "accumulated_ascent_m": 125.21725743908706, "window_maxima": { "max_5m": { "gradient_pct": 23.785898546769886, "start_distance_m": 441.0, "end_distance_m": 446.0, "midpoint_distance_m": 443.5, "start_elevation_m": 468.80349750401746, "end_elevation_m": 469.99279243135595, "start_xy": [ 800619.9594675318, 6518555.048587193 ], "end_xy": [ 800623.1362047575, 6518551.187455157 ] }, "max_10m": { "gradient_pct": 23.540386631134425, "start_distance_m": 452.0, "end_distance_m": 462.0, "midpoint_distance_m": 457.0, "start_elevation_m": 471.36239936554273, "end_elevation_m": 473.71643802865617, "start_xy": [ 800626.9482894284, 6518546.554096714 ], "end_xy": [ 800633.3017638797, 6518538.831832642 ] }, "max_20m": { "gradient_pct": 23.379327680536903, "start_distance_m": 441.0, "end_distance_m": 461.0, "midpoint_distance_m": 451.0, "start_elevation_m": 468.80349750401746, "end_elevation_m": 473.47936304012484, "start_xy": [ 800619.9594675318, 6518555.048587193 ], "end_xy": [ 800632.6664164346, 6518539.604059049 ] }, "max_25m": { "gradient_pct": 23.266944259135926, "start_distance_m": 441.0, "end_distance_m": 466.0, "midpoint_distance_m": 453.5, "start_elevation_m": 468.80349750401746, "end_elevation_m": 474.62023356880144, "start_xy": [ 800619.9594675318, 6518555.048587193 ], "end_xy": [ 800636.0659486962, 6518535.943593422 ] }, "max_50m": { "gradient_pct": 22.33103212563924, "start_distance_m": 419.0, "end_distance_m": 469.0, "midpoint_distance_m": 444.0, "start_elevation_m": 464.1117712732435, "end_elevation_m": 475.2772873360631, "start_xy": [ 800606.2652757271, 6518572.265662201 ], "end_xy": [ 800638.1713460258, 6518533.806468698 ] }, "max_100m": { "gradient_pct": 20.666124260773305, "start_distance_m": 381.0, "end_distance_m": 481.0, "midpoint_distance_m": 431.0, "start_elevation_m": 456.8055977158425, "end_elevation_m": 477.4717219766158, "start_xy": [ 800582.7649404081, 6518602.127581762 ], "end_xy": [ 800648.7419399347, 6518529.850163238 ] } }, "window_minima": { "min_5m": { "gradient_pct": -2.9878915521703675, "start_distance_m": 607.0, "end_distance_m": 612.0, "midpoint_distance_m": 609.5, "start_elevation_m": 485.8090478625092, "end_elevation_m": 485.6596532849007, "start_xy": [ 800758.4391358126, 6518476.125611431 ], "end_xy": [ 800762.0661964314, 6518472.68403748 ] }, "min_10m": { "gradient_pct": -2.735281589012857, "start_distance_m": 603.0, "end_distance_m": 613.0, "midpoint_distance_m": 608.0, "start_elevation_m": 485.9052781702225, "end_elevation_m": 485.63175001132123, "start_xy": [ 800755.5374873176, 6518478.878870592 ], "end_xy": [ 800762.7916085552, 6518471.995722689 ] }, "min_20m": { "gradient_pct": -2.4237294362367834, "start_distance_m": 595.0, "end_distance_m": 615.0, "midpoint_distance_m": 605.0, "start_elevation_m": 486.076872258233, "end_elevation_m": 485.5921263709856, "start_xy": [ 800749.7341903273, 6518484.385388916 ], "end_xy": [ 800764.2168103344, 6518470.592712423 ] }, "min_25m": { "gradient_pct": -2.286822891602924, "start_distance_m": 591.0, "end_distance_m": 616.0, "midpoint_distance_m": 603.5, "start_elevation_m": 486.1380929642906, "end_elevation_m": 485.56638724138986, "start_xy": [ 800746.7670800197, 6518487.062870401 ], "end_xy": [ 800764.9259813568, 6518469.887675927 ] }, "min_50m": { "gradient_pct": -1.656143198575478, "start_distance_m": 574.0, "end_distance_m": 624.0, "midpoint_distance_m": 599.0, "start_elevation_m": 486.3037074211783, "end_elevation_m": 485.47563582189053, "start_xy": [ 800733.3980554774, 6518497.563783827 ], "end_xy": [ 800770.5993495355, 6518464.247383957 ] }, "min_100m": { "gradient_pct": -0.7197513433434892, "start_distance_m": 544.0, "end_distance_m": 644.0, "midpoint_distance_m": 594.0, "start_elevation_m": 486.252904809387, "end_elevation_m": 485.53315346604353, "start_xy": [ 800709.055293376, 6518515.017911422 ], "end_xy": [ 800784.7827699826, 6518450.146654031 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 24.685238617001914, "start_distance_m": 44.0, "end_distance_m": 46.0, "midpoint_distance_m": 45.0, "start_elevation_m": 417.5038372266447, "end_elevation_m": 417.99754199898473, "start_xy": [ 800368.7895960178, 6518846.789444156 ], "end_xy": [ 800370.4522181128, 6518845.677829218 ] }, "max_3m": { "gradient_pct": 23.97275788407948, "start_distance_m": 441.0, "end_distance_m": 444.0, "midpoint_distance_m": 442.5, "start_elevation_m": 468.80349750401746, "end_elevation_m": 469.52268024053984, "start_xy": [ 800619.9594675318, 6518555.048587193 ], "end_xy": [ 800621.8655098672, 6518552.731907971 ] } }, "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": { "texture_suppression": { "masked_fraction": 0.004, "windows_resited": [ 2.0, 3.0, 5.0, 10.0 ], "windows_unresolved": [], "minima_resited": [], "minima_unresolved": [] }, "texture_windows": { "rounds": 1, "windows_masked": [ { "window_m": 5.0, "start_m": 17.0, "end_m": 22.0, "raw_pct": 44.31, "reason": "short-step" } ], "advisory": [], "unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.088, "obstruction_max_height_m": 15.84, "flagged_windows_m": [] }, "excluded_ranges_m": [ [ 15.0, 24.0 ] ], "review": [], "extent": [ "may_start_earlier" ] }, "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_E800-N6517_0m5@22LHD4NL-2025-08-06.tif", "data/cache/fr/ign-lidarhd_dtm_E800-N6518_0m5@22LHD4NL-2025-08-06.tif", "data/cache/fr/ign-lidarhd_dtm_E801-N6517_0m5@22LHD4NL-2025-08-06.tif", "data/cache/fr/ign-lidarhd_dtm_E801-N6518_0m5@22LHD4NL-2025-08-06.tif" ], "calculated_at": "2026-09-22T14:34:55+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": [ "E800-N6517", "E800-N6518", "E801-N6517", "E801-N6518" ], "elevation_blocks": [ "22LHD4NL@2025-08-06" ], "ign_dalles": [ "LHD_FXX_0800_6518_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0800_6519_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0801_6518_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0801_6519_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD4NL" ], "ign_editions": [ "2025-08-06" ], "ign_dsm_edition": { "LHD_FXX_0800_6518_MNT_O_0M50_LAMB93_IGN69": "2025-08-06", "LHD_FXX_0800_6519_MNT_O_0M50_LAMB93_IGN69": "2025-08-06", "LHD_FXX_0801_6518_MNT_O_0M50_LAMB93_IGN69": "2025-08-06", "LHD_FXX_0801_6519_MNT_O_0M50_LAMB93_IGN69": "2025-08-06" }, "climb_origin": "discovered", "structure_own_ways": 3, "carriageway": { "stations": 111, "stations_resolved": 111, "width_median_m": 6.5, "width_p10_m": 3.75, "width_min_m": 3.0, "width_max_m": 11.5, "bounded_share": 0.081, "unbounded_share": 0.919, "confidence_median": 0.0, "width_median_bounded_m": 6.25, "window_m": [ 441.0, 466.0 ], "width_at_max25_m": 3.5, "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": 111, "stations_resolved": 111, "width_median_m": 9.75, "width_p10_m": 3.25, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.288, "unbounded_share": 0.712, "confidence_median": 0.0, "width_median_bounded_m": 4.75, "window_m": [ 441.0, 466.0 ], "width_at_max25_m": 5.25, "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": "Salvizinet", "county": "Loire", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }