{ "ocl_version": "0.1.0", "name": "Chemin des Graviers", "slug": "chemin-des-graviers-2", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 27.57612965883851, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 43.0, "end_distance_m": 45.0, "start_elevation_m": 26.221909410101723, "end_elevation_m": 26.773432003278494, "min_gradient_pct": -6.800713709159467 }, { "window_m": 3.0, "max_gradient_pct": 25.955880116722224, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 43.0, "end_distance_m": 46.0, "start_elevation_m": 26.221909410101723, "end_elevation_m": 27.00058581360339, "min_gradient_pct": -6.628848710607589 }, { "window_m": 5.0, "max_gradient_pct": 24.493611796781494, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 43.0, "end_distance_m": 48.0, "start_elevation_m": 26.221909410101723, "end_elevation_m": 27.446589999940798, "min_gradient_pct": -6.13611532198064 }, { "window_m": 10.0, "max_gradient_pct": 22.96809394415572, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 43.0, "end_distance_m": 53.0, "start_elevation_m": 26.221909410101723, "end_elevation_m": 28.518718804517295, "min_gradient_pct": -5.747389259443096 }, { "window_m": 20.0, "max_gradient_pct": 21.858914635299165, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 29.0, "end_distance_m": 49.0, "start_elevation_m": 23.287825024138087, "end_elevation_m": 27.65960795119792, "min_gradient_pct": -4.2327656211922715 }, { "window_m": 25.0, "max_gradient_pct": 21.732560711628167, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 29.0, "end_distance_m": 54.0, "start_elevation_m": 23.287825024138087, "end_elevation_m": 28.72096520204513, "min_gradient_pct": -3.2440811538002947 }, { "window_m": 50.0, "max_gradient_pct": 19.546670149349495, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 22.0, "end_distance_m": 72.0, "start_elevation_m": 22.453206892235862, "end_elevation_m": 32.22654196691061, "min_gradient_pct": 0.4282027084845197 }, { "window_m": 100.0, "max_gradient_pct": 15.72263069806884, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 18.0, "end_distance_m": 118.0, "start_elevation_m": 21.901048329506132, "end_elevation_m": 37.62367902757497, "min_gradient_pct": 3.245592923038714 } ], "shape": { "ascent_concentration": 0.495, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 117.0, "shape_class": "stepped" }, "length_m": 444.1000000001229, "start_elevation_m": 21.23019713492844, "end_elevation_m": 54.58136289978966, "endpoint_gain_m": 33.35116576486122, "overall_gradient_pct": 7.50983241721504, "accumulated_ascent_m": 34.23045017412626, "window_maxima": { "max_5m": { "gradient_pct": 24.493611796781494, "start_distance_m": 43.0, "end_distance_m": 48.0, "midpoint_distance_m": 45.5, "start_elevation_m": 26.221909410101723, "end_elevation_m": 27.446589999940798, "start_xy": [ 603961.2229526533, 6879978.922687678 ], "end_xy": [ 603959.4098725095, 6879983.582380842 ] }, "max_10m": { "gradient_pct": 22.96809394415572, "start_distance_m": 43.0, "end_distance_m": 53.0, "midpoint_distance_m": 48.0, "start_elevation_m": 26.221909410101723, "end_elevation_m": 28.518718804517295, "start_xy": [ 603961.2229526533, 6879978.922687678 ], "end_xy": [ 603957.5967923657, 6879988.242074007 ] }, "max_20m": { "gradient_pct": 21.858914635299165, "start_distance_m": 29.0, "end_distance_m": 49.0, "midpoint_distance_m": 39.0, "start_elevation_m": 23.287825024138087, "end_elevation_m": 27.65960795119792, "start_xy": [ 603970.5758832222, 6879969.134007081 ], "end_xy": [ 603959.0472564807, 6879984.514319476 ] }, "max_25m": { "gradient_pct": 21.732560711628167, "start_distance_m": 29.0, "end_distance_m": 54.0, "midpoint_distance_m": 41.5, "start_elevation_m": 23.287825024138087, "end_elevation_m": 28.72096520204513, "start_xy": [ 603970.5758832222, 6879969.134007081 ], "end_xy": [ 603957.2341763369, 6879989.1740126405 ] }, "max_50m": { "gradient_pct": 19.546670149349495, "start_distance_m": 22.0, "end_distance_m": 72.0, "midpoint_distance_m": 47.0, "start_elevation_m": 22.453206892235862, "end_elevation_m": 32.22654196691061, "start_xy": [ 603976.19213756, 6879964.955767355 ], "end_xy": [ 603950.7070878191, 6880005.948908035 ] }, "max_100m": { "gradient_pct": 15.72263069806884, "start_distance_m": 18.0, "end_distance_m": 118.0, "midpoint_distance_m": 68.0, "start_elevation_m": 21.901048329506132, "end_elevation_m": 37.62367902757497, "start_xy": [ 603979.401425753, 6879962.568201797 ], "end_xy": [ 603937.0121366364, 6880049.845209728 ] } }, "window_minima": { "min_5m": { "gradient_pct": -6.13611532198064, "start_distance_m": 433.0, "end_distance_m": 438.0, "midpoint_distance_m": 435.5, "start_elevation_m": 55.20750660157768, "end_elevation_m": 54.900700835478645, "start_xy": [ 603940.4328577305, 6880317.714312527 ], "end_xy": [ 603945.4122611583, 6880317.4460086515 ] }, "min_10m": { "gradient_pct": -5.747389259443096, "start_distance_m": 434.0, "end_distance_m": 444.0, "midpoint_distance_m": 439.0, "start_elevation_m": 55.16126268657658, "end_elevation_m": 54.58652376063227, "start_xy": [ 603941.430296768, 6880317.642790736 ], "end_xy": [ 603951.2217076699, 6880318.945529788 ] }, "min_20m": { "gradient_pct": -4.2327656211922715, "start_distance_m": 424.0, "end_distance_m": 444.0, "midpoint_distance_m": 434.0, "start_elevation_m": 55.43307688487072, "end_elevation_m": 54.58652376063227, "start_xy": [ 603931.8625464872, 6880319.91561589 ], "end_xy": [ 603951.2217076699, 6880318.945529788 ] }, "min_25m": { "gradient_pct": -3.2440811538002947, "start_distance_m": 419.0, "end_distance_m": 444.0, "midpoint_distance_m": 431.5, "start_elevation_m": 55.39754404908234, "end_elevation_m": 54.58652376063227, "start_xy": [ 603927.3369835118, 6880322.041475658 ], "end_xy": [ 603951.2217076699, 6880318.945529788 ] }, "min_50m": { "gradient_pct": 0.4282027084845197, "start_distance_m": 394.0, "end_distance_m": 444.0, "midpoint_distance_m": 419.0, "start_elevation_m": 54.37242240639001, "end_elevation_m": 54.58652376063227, "start_xy": [ 603905.5652716407, 6880320.874425147 ], "end_xy": [ 603951.2217076699, 6880318.945529788 ] }, "min_100m": { "gradient_pct": 3.245592923038714, "start_distance_m": 344.0, "end_distance_m": 444.0, "midpoint_distance_m": 394.0, "start_elevation_m": 51.340930837593554, "end_elevation_m": 54.58652376063227, "start_xy": [ 603921.0039580445, 6880274.451549585 ], "end_xy": [ 603951.2217076699, 6880318.945529788 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 27.57612965883851, "start_distance_m": 43.0, "end_distance_m": 45.0, "midpoint_distance_m": 44.0, "start_elevation_m": 26.221909410101723, "end_elevation_m": 26.773432003278494, "start_xy": [ 603961.2229526533, 6879978.922687678 ], "end_xy": [ 603960.4977205958, 6879980.786564943 ] }, "max_3m": { "gradient_pct": 25.955880116722224, "start_distance_m": 43.0, "end_distance_m": 46.0, "midpoint_distance_m": 44.5, "start_elevation_m": 26.221909410101723, "end_elevation_m": 27.00058581360339, "start_xy": [ 603961.2229526533, 6879978.922687678 ], "end_xy": [ 603960.135104567, 6879981.718503577 ] } }, "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": 0.341, "obstruction_max_height_m": 21.66, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50, 100 ] }, "review": [], "extent": [ "may_start_earlier", "descends_at_end" ] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "16bcc1553fe58b280e0c4a66a3ab0980530490a6", "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-ce2", "road_pbf": "block-batch-fr-ce2.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": "sha256:18f786cf9fa98070" }, "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_E603-N6879_0m5@21LHDJE-2025-06-05.tif", "data/cache/fr/ign-lidarhd_dtm_E603-N6880_0m5@21LHDJE-2025-06-05.tif", "data/cache/fr/ign-lidarhd_dtm_E604-N6879_0m5@21LHDJE-2025-06-05.tif", "data/cache/fr/ign-lidarhd_dtm_E604-N6880_0m5@21LHDJE-2025-06-05.tif" ], "calculated_at": "2026-09-26T21:49:38+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-ce2.osm.pbf", "osm_snapshot": "", "run_id": "fr-ce2", "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": [ "E603-N6879", "E603-N6880", "E604-N6879", "E604-N6880" ], "elevation_blocks": [ "21LHDJE@2025-06-05" ], "ign_dalles": [ "LHD_FXX_0603_6880_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0603_6881_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0604_6880_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0604_6881_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHDJE" ], "ign_editions": [ "2025-06-05" ], "ign_dsm_edition": { "LHD_FXX_0603_6880_MNT_O_0M50_LAMB93_IGN69": "2025-06-05", "LHD_FXX_0603_6881_MNT_O_0M50_LAMB93_IGN69": "2025-06-05", "LHD_FXX_0604_6880_MNT_O_0M50_LAMB93_IGN69": "2025-06-05", "LHD_FXX_0604_6881_MNT_O_0M50_LAMB93_IGN69": "2025-06-05" }, "route_cut_m": 444.1, "climb_origin": "discovered", "seam_filled_samples": { "count": 0, "distances_m": [] }, "seam_filled_in_maximum": false, "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked", "carriageway": { "stations": 24, "stations_resolved": 24, "width_median_m": 4.12, "width_p10_m": 2.83, "width_min_m": 2.25, "width_max_m": 11.0, "bounded_share": 0.167, "unbounded_share": 0.833, "confidence_median": 0.0, "width_median_bounded_m": 3.25, "window_m": [ 29.0, 54.0 ], "width_at_max25_m": 3.0, "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": 24, "stations_resolved": 24, "width_median_m": 2.38, "width_p10_m": 0.5, "width_min_m": 0.5, "width_max_m": 11.75, "bounded_share": 0.792, "unbounded_share": 0.208, "confidence_median": 1.0, "width_median_bounded_m": 1.5, "window_m": [ 29.0, 54.0 ], "width_at_max25_m": 2.25, "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": "Follainville-Dennemont", "county": "Yvelines", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }