{ "ocl_version": "0.1.0", "name": "Col de la Vernhette from Bouloc", "slug": "col-de-la-vernhette-from-bouloc-2", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 10.404587871153126, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 34.0, "end_distance_m": 36.0, "start_elevation_m": 973.7764946720439, "end_elevation_m": 973.984586429467, "min_gradient_pct": -2.276422073646245 }, { "window_m": 3.0, "max_gradient_pct": 7.654650876512885, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 33.0, "end_distance_m": 36.0, "start_elevation_m": 973.7549469031716, "end_elevation_m": 973.984586429467, "min_gradient_pct": -2.2957995552436237 }, { "window_m": 5.0, "max_gradient_pct": 6.2765856403848375, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 31.0, "end_distance_m": 36.0, "start_elevation_m": 973.6707571474477, "end_elevation_m": 973.984586429467, "min_gradient_pct": -1.8956090832853079 }, { "window_m": 10.0, "max_gradient_pct": 5.7512199866187075, "diagnostic": false, "flags": [], "start_distance_m": 1227.0, "end_distance_m": 1237.0, "start_elevation_m": 1022.1855006009389, "end_elevation_m": 1022.7606225996008, "min_gradient_pct": -1.622680378068253 }, { "window_m": 20.0, "max_gradient_pct": 5.685755047618386, "diagnostic": false, "flags": [], "start_distance_m": 1227.0, "end_distance_m": 1247.0, "start_elevation_m": 1022.1855006009389, "end_elevation_m": 1023.3226516104626, "min_gradient_pct": -1.305747767378307 }, { "window_m": 25.0, "max_gradient_pct": 5.6181078355070895, "diagnostic": false, "flags": [], "start_distance_m": 1225.0, "end_distance_m": 1250.0, "start_elevation_m": 1022.0840382396921, "end_elevation_m": 1023.4885651985688, "min_gradient_pct": -1.2221692202892882 }, { "window_m": 50.0, "max_gradient_pct": 5.586905898836221, "diagnostic": false, "flags": [], "start_distance_m": 1191.0, "end_distance_m": 1241.0, "start_elevation_m": 1020.1903679771596, "end_elevation_m": 1022.9838209265777, "min_gradient_pct": -0.6516634587674162 }, { "window_m": 100.0, "max_gradient_pct": 5.404256235650337, "diagnostic": false, "flags": [], "start_distance_m": 1156.0, "end_distance_m": 1256.0, "start_elevation_m": 1018.3985915534568, "end_elevation_m": 1023.8028477891071, "min_gradient_pct": -0.355800247129082 } ], "shape": { "ascent_concentration": 0.306, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 0.0, "shape_class": "sustained" }, "length_m": 1840.6347809828171, "start_elevation_m": 972.3604913832979, "end_elevation_m": 1034.6126106933561, "endpoint_gain_m": 62.25211931005822, "overall_gradient_pct": 3.382100564068357, "accumulated_ascent_m": 63.02717210411993, "window_maxima": { "max_5m": { "gradient_pct": 6.2765856403848375, "start_distance_m": 31.0, "end_distance_m": 36.0, "midpoint_distance_m": 33.5, "start_elevation_m": 973.6707571474477, "end_elevation_m": 973.984586429467, "start_xy": [ 689335.0877854616, 6338917.02436507 ], "end_xy": [ 689333.4443637618, 6338912.302165888 ] }, "max_10m": { "gradient_pct": 5.7512199866187075, "start_distance_m": 1227.0, "end_distance_m": 1237.0, "midpoint_distance_m": 1232.0, "start_elevation_m": 1022.1855006009389, "end_elevation_m": 1022.7606225996008, "start_xy": [ 689431.7766761787, 6337975.933059035 ], "end_xy": [ 689436.8370071551, 6337967.307918433 ] }, "max_20m": { "gradient_pct": 5.685755047618386, "start_distance_m": 1227.0, "end_distance_m": 1247.0, "midpoint_distance_m": 1237.0, "start_elevation_m": 1022.1855006009389, "end_elevation_m": 1023.3226516104626, "start_xy": [ 689431.7766761787, 6337975.933059035 ], "end_xy": [ 689441.8973381314, 6337958.68277783 ] }, "max_25m": { "gradient_pct": 5.6181078355070895, "start_distance_m": 1225.0, "end_distance_m": 1250.0, "midpoint_distance_m": 1237.5, "start_elevation_m": 1022.0840382396921, "end_elevation_m": 1023.4885651985688, "start_xy": [ 689430.7646099834, 6337977.658087156 ], "end_xy": [ 689443.4154374244, 6337956.0952356495 ] }, "max_50m": { "gradient_pct": 5.586905898836221, "start_distance_m": 1191.0, "end_distance_m": 1241.0, "midpoint_distance_m": 1216.0, "start_elevation_m": 1020.1903679771596, "end_elevation_m": 1022.9838209265777, "start_xy": [ 689413.0619850506, 6338006.6852822825 ], "end_xy": [ 689438.8611395457, 6337963.857862192 ] }, "max_100m": { "gradient_pct": 5.404256235650337, "start_distance_m": 1156.0, "end_distance_m": 1256.0, "midpoint_distance_m": 1206.0, "start_elevation_m": 1018.3985915534568, "end_elevation_m": 1023.8028477891071, "start_xy": [ 689394.7793146699, 6338036.530616319 ], "end_xy": [ 689446.4516360103, 6337950.920151289 ] } }, "window_minima": { "min_5m": { "gradient_pct": -1.8956090832853079, "start_distance_m": 1833.0, "end_distance_m": 1838.0, "midpoint_distance_m": 1835.5, "start_elevation_m": 1034.7610829436323, "end_elevation_m": 1034.666302489468, "start_xy": [ 689720.0015649841, 6337480.072785964 ], "end_xy": [ 689724.9253702856, 6337479.203222078 ] }, "min_10m": { "gradient_pct": -1.622680378068253, "start_distance_m": 1829.0, "end_distance_m": 1839.0, "midpoint_distance_m": 1834.0, "start_elevation_m": 1034.807210805885, "end_elevation_m": 1034.6449427680782, "start_xy": [ 689716.0625207428, 6337480.768437073 ], "end_xy": [ 689725.910131346, 6337479.029309301 ] }, "min_20m": { "gradient_pct": -1.305747767378307, "start_distance_m": 1819.0, "end_distance_m": 1839.0, "midpoint_distance_m": 1829.0, "start_elevation_m": 1034.9060923215538, "end_elevation_m": 1034.6449427680782, "start_xy": [ 689706.2149101396, 6337482.507564845 ], "end_xy": [ 689725.910131346, 6337479.029309301 ] }, "min_25m": { "gradient_pct": -1.2221692202892882, "start_distance_m": 1814.0, "end_distance_m": 1839.0, "midpoint_distance_m": 1826.5, "start_elevation_m": 1034.9504850731505, "end_elevation_m": 1034.6449427680782, "start_xy": [ 689701.2911048379, 6337483.3771287305 ], "end_xy": [ 689725.910131346, 6337479.029309301 ] }, "min_50m": { "gradient_pct": -0.6516634587674162, "start_distance_m": 1789.0, "end_distance_m": 1839.0, "midpoint_distance_m": 1814.0, "start_elevation_m": 1034.970774497462, "end_elevation_m": 1034.6449427680782, "start_xy": [ 689677.5617950374, 6337490.709953618 ], "end_xy": [ 689725.910131346, 6337479.029309301 ] }, "min_100m": { "gradient_pct": -0.355800247129082, "start_distance_m": 1739.0, "end_distance_m": 1839.0, "midpoint_distance_m": 1789.0, "start_elevation_m": 1035.0007430152073, "end_elevation_m": 1034.6449427680782, "start_xy": [ 689633.5276932104, 6337513.627144484 ], "end_xy": [ 689725.910131346, 6337479.029309301 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 10.404587871153126, "start_distance_m": 34.0, "end_distance_m": 36.0, "midpoint_distance_m": 35.0, "start_elevation_m": 973.7764946720439, "end_elevation_m": 973.984586429467, "start_xy": [ 689334.1017324417, 6338914.191045561 ], "end_xy": [ 689333.4443637618, 6338912.302165888 ] }, "max_3m": { "gradient_pct": 7.654650876512885, "start_distance_m": 33.0, "end_distance_m": 36.0, "midpoint_distance_m": 34.5, "start_elevation_m": 973.7549469031716, "end_elevation_m": 973.984586429467, "start_xy": [ 689334.4304167817, 6338915.135485398 ], "end_xy": [ 689333.4443637618, 6338912.302165888 ] } }, "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": 0.04, "obstruction_max_height_m": 23.95, "flagged_windows_m": [ 2, 3, 5 ] }, "review": [], "extent": [] }, "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-mc4", "road_pbf": "block-batch-fr-mc4.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_E689-N6337_0m5@21LHD4LO-2024-12-13.tif", "data/cache/fr/ign-lidarhd_dtm_E689-N6338_0m5@21LHD4LO-2024-12-13.tif" ], "calculated_at": "2026-09-22T16:50:30+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc4.osm.pbf", "osm_snapshot": "", "run_id": "fr-mc4", "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": [ "E689-N6337", "E689-N6338" ], "elevation_blocks": [ "21LHD4LO@2024-12-13" ], "ign_dalles": [ "LHD_FXX_0689_6338_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0689_6339_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD4LO" ], "ign_editions": [ "2024-12-13" ], "ign_dsm_edition": { "LHD_FXX_0689_6338_MNT_O_0M50_LAMB93_IGN69": "2024-12-13", "LHD_FXX_0689_6339_MNT_O_0M50_LAMB93_IGN69": "2024-12-13" }, "climb_origin": "named-pass", "structure_own_ways": 2, "carriageway": { "stations": 78, "stations_resolved": 78, "width_median_m": 8.25, "width_p10_m": 6.42, "width_min_m": 5.5, "width_max_m": 11.0, "bounded_share": 0.179, "unbounded_share": 0.821, "confidence_median": 0.0, "width_median_bounded_m": 8.62, "window_m": [ 1225.0, 1250.0 ], "width_at_max25_m": 6.75, "window_stations": 6, "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": 78, "stations_resolved": 78, "width_median_m": 9.75, "width_p10_m": 6.5, "width_min_m": 1.25, "width_max_m": 12.0, "bounded_share": 0.346, "unbounded_share": 0.654, "confidence_median": 0.0, "width_median_bounded_m": 7.75, "window_m": [ 1225.0, 1250.0 ], "width_at_max25_m": 8.25, "window_stations": 6, "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": "Salles-Curan", "county": "Aveyron", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }