{ "ocl_version": "0.1.0", "name": "Chemin de Loye", "slug": "chemin-de-loye", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 31.493852093046826, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 1740.0, "end_distance_m": 1742.0, "start_elevation_m": 730.0599876637921, "end_elevation_m": 730.689864705653, "min_gradient_pct": -7.2046129675243265 }, { "window_m": 3.0, "max_gradient_pct": 30.70056472432346, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 1739.0, "end_distance_m": 1742.0, "start_elevation_m": 729.7688477639233, "end_elevation_m": 730.689864705653, "min_gradient_pct": -5.6843852166897095 }, { "window_m": 5.0, "max_gradient_pct": 26.383721119971142, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 1739.0, "end_distance_m": 1744.0, "start_elevation_m": 729.7688477639233, "end_elevation_m": 731.0880338199219, "min_gradient_pct": -4.122964987550404 }, { "window_m": 10.0, "max_gradient_pct": 22.62809453600994, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 1739.0, "end_distance_m": 1749.0, "start_elevation_m": 729.7688477639233, "end_elevation_m": 732.0316572175243, "min_gradient_pct": -3.83823629541439 }, { "window_m": 20.0, "max_gradient_pct": 21.70430751277138, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 1739.0, "end_distance_m": 1759.0, "start_elevation_m": 729.7688477639233, "end_elevation_m": 734.1097092664776, "min_gradient_pct": -3.4452653701976033 }, { "window_m": 25.0, "max_gradient_pct": 21.30775536535566, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 1739.0, "end_distance_m": 1764.0, "start_elevation_m": 729.7688477639233, "end_elevation_m": 735.0957866052622, "min_gradient_pct": -3.2158990403327152 }, { "window_m": 50.0, "max_gradient_pct": 20.056962367188135, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 1884.0, "end_distance_m": 1934.0, "start_elevation_m": 755.7840468989604, "end_elevation_m": 765.8125280825544, "min_gradient_pct": -2.9511208139751943 }, { "window_m": 100.0, "max_gradient_pct": 19.267604654458637, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 2050.0, "end_distance_m": 2150.0, "start_elevation_m": 785.9411697226062, "end_elevation_m": 805.2087743770649, "min_gradient_pct": -0.831879542485126 } ], "shape": { "ascent_concentration": 0.4, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 502.0, "shape_class": "sustained" }, "length_m": 2209.200567117427, "start_elevation_m": 574.5491005432218, "end_elevation_m": 814.9221142295241, "endpoint_gain_m": 240.37301368630233, "overall_gradient_pct": 10.880542820063727, "accumulated_ascent_m": 242.4224133653472, "window_maxima": { "max_5m": { "gradient_pct": 26.383721119971142, "start_distance_m": 1739.0, "end_distance_m": 1744.0, "midpoint_distance_m": 1741.5, "start_elevation_m": 729.7688477639233, "end_elevation_m": 731.0880338199219, "start_xy": [ 827922.6251307251, 6475245.064013111 ], "end_xy": [ 827917.6561063522, 6475244.508318247 ] }, "max_10m": { "gradient_pct": 22.62809453600994, "start_distance_m": 1739.0, "end_distance_m": 1749.0, "midpoint_distance_m": 1744.0, "start_elevation_m": 729.7688477639233, "end_elevation_m": 732.0316572175243, "start_xy": [ 827922.6251307251, 6475245.064013111 ], "end_xy": [ 827912.6870819794, 6475243.952623383 ] }, "max_20m": { "gradient_pct": 21.70430751277138, "start_distance_m": 1739.0, "end_distance_m": 1759.0, "midpoint_distance_m": 1749.0, "start_elevation_m": 729.7688477639233, "end_elevation_m": 734.1097092664776, "start_xy": [ 827922.6251307251, 6475245.064013111 ], "end_xy": [ 827902.745283672, 6475242.903169141 ] }, "max_25m": { "gradient_pct": 21.30775536535566, "start_distance_m": 1739.0, "end_distance_m": 1764.0, "midpoint_distance_m": 1751.5, "start_elevation_m": 729.7688477639233, "end_elevation_m": 735.0957866052622, "start_xy": [ 827922.6251307251, 6475245.064013111 ], "end_xy": [ 827897.7455122948, 6475242.855355171 ] }, "max_50m": { "gradient_pct": 20.056962367188135, "start_distance_m": 1884.0, "end_distance_m": 1934.0, "midpoint_distance_m": 1909.0, "start_elevation_m": 755.7840468989604, "end_elevation_m": 765.8125280825544, "start_xy": [ 827783.1534460436, 6475255.8378445795 ], "end_xy": [ 827761.4054849469, 6475289.709588299 ] }, "max_100m": { "gradient_pct": 19.267604654458637, "start_distance_m": 2050.0, "end_distance_m": 2150.0, "midpoint_distance_m": 2100.0, "start_elevation_m": 785.9411697226062, "end_elevation_m": 805.2087743770649, "start_xy": [ 827678.6523931485, 6475249.726509189 ], "end_xy": [ 827599.2261444116, 6475216.59011274 ] } }, "window_minima": { "min_5m": { "gradient_pct": -4.122964987550404, "start_distance_m": 279.0, "end_distance_m": 284.0, "midpoint_distance_m": 281.5, "start_elevation_m": 600.5199686862254, "end_elevation_m": 600.3138204368479, "start_xy": [ 829010.9781137563, 6475092.550016596 ], "end_xy": [ 829015.7597324296, 6475094.006372255 ] }, "min_10m": { "gradient_pct": -3.83823629541439, "start_distance_m": 278.0, "end_distance_m": 288.0, "midpoint_distance_m": 283.0, "start_elevation_m": 600.5494305957643, "end_elevation_m": 600.1656069662229, "start_xy": [ 829010.0093669553, 6475092.301964917 ], "end_xy": [ 829019.509014266, 6475095.391400761 ] }, "min_20m": { "gradient_pct": -3.4452653701976033, "start_distance_m": 269.0, "end_distance_m": 289.0, "midpoint_distance_m": 279.0, "start_elevation_m": 600.8378644682897, "end_elevation_m": 600.1488113942502, "start_xy": [ 829001.2461195752, 6475090.258406649 ], "end_xy": [ 829020.4345986167, 6475095.769942186 ] }, "min_25m": { "gradient_pct": -3.2158990403327152, "start_distance_m": 269.0, "end_distance_m": 294.0, "midpoint_distance_m": 281.5, "start_elevation_m": 600.8378644682897, "end_elevation_m": 600.0338897082065, "start_xy": [ 829001.2461195752, 6475090.258406649 ], "end_xy": [ 829024.9416328805, 6475097.91924253 ] }, "min_50m": { "gradient_pct": -2.9511208139751943, "start_distance_m": 269.0, "end_distance_m": 319.0, "midpoint_distance_m": 294.0, "start_elevation_m": 600.8378644682897, "end_elevation_m": 599.3623040613021, "start_xy": [ 829001.2461195752, 6475090.258406649 ], "end_xy": [ 829046.6705488908, 6475110.279357432 ] }, "min_100m": { "gradient_pct": -0.831879542485126, "start_distance_m": 269.0, "end_distance_m": 369.0, "midpoint_distance_m": 319.0, "start_elevation_m": 600.8378644682897, "end_elevation_m": 600.0059849258046, "start_xy": [ 829001.2461195752, 6475090.258406649 ], "end_xy": [ 829084.355626876, 6475140.965735305 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 31.493852093046826, "start_distance_m": 1740.0, "end_distance_m": 1742.0, "midpoint_distance_m": 1741.0, "start_elevation_m": 730.0599876637921, "end_elevation_m": 730.689864705653, "start_xy": [ 827921.6313258505, 6475244.952874138 ], "end_xy": [ 827919.6437161013, 6475244.730596192 ] }, "max_3m": { "gradient_pct": 30.70056472432346, "start_distance_m": 1739.0, "end_distance_m": 1742.0, "midpoint_distance_m": 1740.5, "start_elevation_m": 729.7688477639233, "end_elevation_m": 730.689864705653, "start_xy": [ 827922.6251307251, 6475245.064013111 ], "end_xy": [ 827919.6437161013, 6475244.730596192 ] } }, "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": 0.162, "obstruction_max_height_m": 23.11, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50, 100 ] }, "review": [], "extent": [ "may_start_earlier", "may_continue_beyond_end" ] }, "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-mc8", "road_pbf": "block-batch-fr-mc8.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_E827-N6475_0m5@22LHD5NM-2025-02-27.tif", "data/cache/fr/ign-lidarhd_dtm_E828-N6474_0m5@22LHD5NM-2025-02-27.tif", "data/cache/fr/ign-lidarhd_dtm_E828-N6475_0m5@22LHD5NM-2025-02-27.tif", "data/cache/fr/ign-lidarhd_dtm_E829-N6474_0m5@22LHD5NM-2025-02-27.tif", "data/cache/fr/ign-lidarhd_dtm_E829-N6475_0m5@22LHD5NM-2025-02-27.tif" ], "calculated_at": "2026-09-22T12:29:38+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc8.osm.pbf", "osm_snapshot": "", "run_id": "fr-mc8", "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": [ "E827-N6475", "E828-N6474", "E828-N6475", "E829-N6474", "E829-N6475" ], "elevation_blocks": [ "22LHD5NM@2025-02-27" ], "ign_dalles": [ "LHD_FXX_0827_6476_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0828_6475_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0828_6476_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0829_6475_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0829_6476_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD5NM" ], "ign_editions": [ "2025-02-27" ], "ign_dsm_edition": { "LHD_FXX_0827_6476_MNT_O_0M50_LAMB93_IGN69": "2025-02-27", "LHD_FXX_0828_6475_MNT_O_0M50_LAMB93_IGN69": "2025-02-27", "LHD_FXX_0828_6476_MNT_O_0M50_LAMB93_IGN69": "2025-02-27", "LHD_FXX_0829_6475_MNT_O_0M50_LAMB93_IGN69": "2025-02-27", "LHD_FXX_0829_6476_MNT_O_0M50_LAMB93_IGN69": "2025-02-27" }, "climb_origin": "discovered", "structure_own_ways": 4, "carriageway": { "stations": 95, "stations_resolved": 95, "width_median_m": 5.0, "width_p10_m": 3.5, "width_min_m": 2.5, "width_max_m": 12.0, "bounded_share": 0.337, "unbounded_share": 0.663, "confidence_median": 0.0, "width_median_bounded_m": 5.0, "window_m": [ 1739.0, 1764.0 ], "width_at_max25_m": 5.25, "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": 95, "stations_resolved": 95, "width_median_m": 5.0, "width_p10_m": 1.35, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.811, "unbounded_share": 0.189, "confidence_median": 1.0, "width_median_bounded_m": 4.25, "window_m": [ 1739.0, 1764.0 ], "width_at_max25_m": 2.0, "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": "V\u00e9ranne", "county": "Loire", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }