{ "ocl_version": "0.1.0", "name": "Chemin des Combes", "slug": "chemin-des-combes-4", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 22.093332752672268, "diagnostic": true, "flags": [], "start_distance_m": 615.0, "end_distance_m": 617.0, "start_elevation_m": 758.4034054288784, "end_elevation_m": 758.8452720839318, "min_gradient_pct": -3.1553570846256207 }, { "window_m": 3.0, "max_gradient_pct": 21.97379759516404, "diagnostic": true, "flags": [], "start_distance_m": 601.0, "end_distance_m": 604.0, "start_elevation_m": 755.5486104724628, "end_elevation_m": 756.2078244003177, "min_gradient_pct": -3.2331559678671815 }, { "window_m": 5.0, "max_gradient_pct": 21.217508358399755, "diagnostic": false, "flags": [], "start_distance_m": 601.0, "end_distance_m": 606.0, "start_elevation_m": 755.5486104724628, "end_elevation_m": 756.6094858903828, "min_gradient_pct": -3.065835735001201 }, { "window_m": 10.0, "max_gradient_pct": 20.867833845449013, "diagnostic": false, "flags": [], "start_distance_m": 611.0, "end_distance_m": 621.0, "start_elevation_m": 757.5669958411466, "end_elevation_m": 759.6537792256916, "min_gradient_pct": -2.1152165600312856 }, { "window_m": 20.0, "max_gradient_pct": 20.525843766143907, "diagnostic": false, "flags": [], "start_distance_m": 601.0, "end_distance_m": 621.0, "start_elevation_m": 755.5486104724628, "end_elevation_m": 759.6537792256916, "min_gradient_pct": 0.27871539745035534 }, { "window_m": 25.0, "max_gradient_pct": 20.42322481928022, "diagnostic": false, "flags": [], "start_distance_m": 601.0, "end_distance_m": 626.0, "start_elevation_m": 755.5486104724628, "end_elevation_m": 760.6544166772828, "min_gradient_pct": 1.3199083661638724 }, { "window_m": 50.0, "max_gradient_pct": 19.655226849897872, "diagnostic": false, "flags": [], "start_distance_m": 579.0, "end_distance_m": 629.0, "start_elevation_m": 751.4251144718316, "end_elevation_m": 761.2527278967806, "min_gradient_pct": 1.9443481174300814 }, { "window_m": 100.0, "max_gradient_pct": 16.78284942014534, "diagnostic": false, "flags": [], "start_distance_m": 530.0, "end_distance_m": 630.0, "start_elevation_m": 744.6310684574785, "end_elevation_m": 761.4139178776238, "min_gradient_pct": 2.3849448985209847 } ], "shape": { "ascent_concentration": 0.455, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 90.0, "shape_class": "stepped" }, "length_m": 630.1832616907807, "start_elevation_m": 717.4496345800728, "end_elevation_m": 761.4422447506784, "endpoint_gain_m": 43.99261017060553, "overall_gradient_pct": 6.980923303575761, "accumulated_ascent_m": 44.35936746088714, "window_maxima": { "max_5m": { "gradient_pct": 21.217508358399755, "start_distance_m": 601.0, "end_distance_m": 606.0, "midpoint_distance_m": 603.5, "start_elevation_m": 755.5486104724628, "end_elevation_m": 756.6094858903828, "start_xy": [ 739058.8181249959, 6375697.658240186 ], "end_xy": [ 739058.9410287434, 6375702.629035368 ] }, "max_10m": { "gradient_pct": 20.867833845449013, "start_distance_m": 611.0, "end_distance_m": 621.0, "midpoint_distance_m": 616.0, "start_elevation_m": 757.5669958411466, "end_elevation_m": 759.6537792256916, "start_xy": [ 739060.0008173033, 6375707.51542956 ], "end_xy": [ 739064.1514278625, 6375716.575615702 ] }, "max_20m": { "gradient_pct": 20.525843766143907, "start_distance_m": 601.0, "end_distance_m": 621.0, "midpoint_distance_m": 611.0, "start_elevation_m": 755.5486104724628, "end_elevation_m": 759.6537792256916, "start_xy": [ 739058.8181249959, 6375697.658240186 ], "end_xy": [ 739064.1514278625, 6375716.575615702 ] }, "max_25m": { "gradient_pct": 20.42322481928022, "start_distance_m": 601.0, "end_distance_m": 626.0, "midpoint_distance_m": 613.5, "start_elevation_m": 755.5486104724628, "end_elevation_m": 760.6544166772828, "start_xy": [ 739058.8181249959, 6375697.658240186 ], "end_xy": [ 739066.3769835937, 6375721.052992355 ] }, "max_50m": { "gradient_pct": 19.655226849897872, "start_distance_m": 579.0, "end_distance_m": 629.0, "midpoint_distance_m": 604.0, "start_elevation_m": 751.4251144718316, "end_elevation_m": 761.2527278967806, "start_xy": [ 739064.232615091, 6375676.588893641 ], "end_xy": [ 739067.7123170324, 6375723.739418346 ] }, "max_100m": { "gradient_pct": 16.78284942014534, "start_distance_m": 530.0, "end_distance_m": 630.0, "midpoint_distance_m": 580.0, "start_elevation_m": 744.6310684574785, "end_elevation_m": 761.4139178776238, "start_xy": [ 739089.8350271002, 6375656.239642948 ], "end_xy": [ 739068.1574281787, 6375724.634893676 ] } }, "window_minima": { "min_5m": { "gradient_pct": -3.065835735001201, "start_distance_m": 498.0, "end_distance_m": 503.0, "midpoint_distance_m": 500.5, "start_elevation_m": 742.2551045647588, "end_elevation_m": 742.1018127780087, "start_xy": [ 739062.5796167928, 6375642.770589049 ], "end_xy": [ 739067.4588387347, 6375643.862922899 ] }, "min_10m": { "gradient_pct": -2.1152165600312856, "start_distance_m": 493.0, "end_distance_m": 503.0, "midpoint_distance_m": 498.0, "start_elevation_m": 742.3133344340118, "end_elevation_m": 742.1018127780087, "start_xy": [ 739057.7004715307, 6375641.677913314 ], "end_xy": [ 739067.4588387347, 6375643.862922899 ] }, "min_20m": { "gradient_pct": 0.27871539745035534, "start_distance_m": 484.0, "end_distance_m": 504.0, "midpoint_distance_m": 494.0, "start_elevation_m": 742.1034729897646, "end_elevation_m": 742.1592160692546, "start_xy": [ 739048.9194144969, 6375639.704835168 ], "end_xy": [ 739068.1802930083, 6375644.346274114 ] }, "min_25m": { "gradient_pct": 1.3199083661638724, "start_distance_m": 478.0, "end_distance_m": 503.0, "midpoint_distance_m": 490.5, "start_elevation_m": 741.7718356864677, "end_elevation_m": 742.1018127780087, "start_xy": [ 739043.2293878167, 6375637.83237167 ], "end_xy": [ 739067.4588387347, 6375643.862922899 ] }, "min_50m": { "gradient_pct": 1.9443481174300814, "start_distance_m": 309.0, "end_distance_m": 359.0, "midpoint_distance_m": 334.0, "start_elevation_m": 736.6903486982291, "end_elevation_m": 737.6625227569441, "start_xy": [ 738880.4676153366, 6375596.821460158 ], "end_xy": [ 738929.6966408398, 6375604.588656884 ] }, "min_100m": { "gradient_pct": 2.3849448985209847, "start_distance_m": 269.0, "end_distance_m": 369.0, "midpoint_distance_m": 319.0, "start_elevation_m": 735.5217577507495, "end_elevation_m": 737.9067026492705, "start_xy": [ 738840.9606859221, 6375592.8122358 ], "end_xy": [ 738939.6605164852, 6375605.437881308 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 22.093332752672268, "start_distance_m": 615.0, "end_distance_m": 617.0, "midpoint_distance_m": 616.0, "start_elevation_m": 758.4034054288784, "end_elevation_m": 758.8452720839318, "start_xy": [ 739061.4807609849, 6375711.2027637195 ], "end_xy": [ 739062.3709832774, 6375712.99371438 ] }, "max_3m": { "gradient_pct": 21.97379759516404, "start_distance_m": 601.0, "end_distance_m": 604.0, "midpoint_distance_m": 602.5, "start_elevation_m": 755.5486104724628, "end_elevation_m": 756.2078244003177, "start_xy": [ 739058.8181249959, 6375697.658240186 ], "end_xy": [ 739058.7164770624, 6375700.656517642 ] } }, "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": 0.136, "obstruction_max_height_m": 12.8, "flagged_windows_m": [] }, "review": [], "extent": [ "may_start_earlier", "may_continue_beyond_end" ] }, "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-mc5", "road_pbf": "block-batch-fr-mc5.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_E738-N6375_0m5@21LHD4MO-2024-12-13.tif", "data/cache/fr/ign-lidarhd_dtm_E739-N6375_0m5@21LHD4MO-2024-12-13.tif" ], "calculated_at": "2026-09-22T17:34:35+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc5.osm.pbf", "osm_snapshot": "", "run_id": "fr-mc5", "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": [ "E738-N6375", "E739-N6375" ], "elevation_blocks": [ "21LHD4MO@2024-12-13" ], "ign_dalles": [ "LHD_FXX_0738_6376_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0739_6376_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD4MO" ], "ign_editions": [ "2024-12-13" ], "ign_dsm_edition": { "LHD_FXX_0738_6376_MNT_O_0M50_LAMB93_IGN69": "2024-12-13", "LHD_FXX_0739_6376_MNT_O_0M50_LAMB93_IGN69": "2024-12-13" }, "climb_origin": "discovered", "structure_own_ways": 3, "carriageway": { "stations": 32, "stations_resolved": 32, "width_median_m": 5.62, "width_p10_m": 4.25, "width_min_m": 3.25, "width_max_m": 12.0, "bounded_share": 0.625, "unbounded_share": 0.375, "confidence_median": 0.729, "width_median_bounded_m": 5.5, "window_m": [ 601.0, 626.0 ], "width_at_max25_m": 7.0, "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": 32, "stations_resolved": 32, "width_median_m": 6.0, "width_p10_m": 3.5, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.75, "unbounded_share": 0.25, "confidence_median": 1.0, "width_median_bounded_m": 4.75, "window_m": [ 601.0, 626.0 ], "width_at_max25_m": 8.25, "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": "Saint-Bauzile", "county": "Loz\u00e8re", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }