{ "ocl_version": "0.1.0", "name": "Chemin de Latserreka", "slug": "chemin-de-latserreka", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 38.27049588271905, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 461.0, "end_distance_m": 463.0, "start_elevation_m": 349.52758573493276, "end_elevation_m": 350.29299565258714, "min_gradient_pct": -16.06232905097329 }, { "window_m": 3.0, "max_gradient_pct": 27.6028625659175, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 460.0, "end_distance_m": 463.0, "start_elevation_m": 349.4649097756096, "end_elevation_m": 350.29299565258714, "min_gradient_pct": -13.700577393939284 }, { "window_m": 5.0, "max_gradient_pct": 19.850092223939555, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 458.0, "end_distance_m": 463.0, "start_elevation_m": 349.30049104139016, "end_elevation_m": 350.29299565258714, "min_gradient_pct": -6.467528320762312 }, { "window_m": 10.0, "max_gradient_pct": 17.800797399770545, "diagnostic": false, "flags": [], "start_distance_m": 262.0, "end_distance_m": 272.0, "start_elevation_m": 328.12361447388025, "end_elevation_m": 329.9036942138573, "min_gradient_pct": -4.675401342142322 }, { "window_m": 20.0, "max_gradient_pct": 17.612460554363167, "diagnostic": false, "flags": [], "start_distance_m": 257.0, "end_distance_m": 277.0, "start_elevation_m": 327.22551977546067, "end_elevation_m": 330.7480118863333, "min_gradient_pct": -3.240949852112749 }, { "window_m": 25.0, "max_gradient_pct": 17.331377783809558, "diagnostic": false, "flags": [], "start_distance_m": 255.0, "end_distance_m": 280.0, "start_elevation_m": 326.903060334359, "end_elevation_m": 331.2359047803114, "min_gradient_pct": -2.468312179364375 }, { "window_m": 50.0, "max_gradient_pct": 16.8166621204914, "diagnostic": false, "flags": [], "start_distance_m": 1181.0, "end_distance_m": 1231.0, "start_elevation_m": 424.6105880232193, "end_elevation_m": 433.018919083465, "min_gradient_pct": 1.5502708218383532 }, { "window_m": 100.0, "max_gradient_pct": 15.753998551328095, "diagnostic": false, "flags": [], "start_distance_m": 981.0, "end_distance_m": 1081.0, "start_elevation_m": 395.2537157367186, "end_elevation_m": 411.0077142880467, "min_gradient_pct": 5.371509929852948 } ], "shape": { "ascent_concentration": 0.318, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 380.0, "shape_class": "sustained" }, "length_m": 1889.4000000000146, "start_elevation_m": 300.7438212392742, "end_elevation_m": 497.5909211000779, "endpoint_gain_m": 196.84709986080367, "overall_gradient_pct": 10.418497928485348, "accumulated_ascent_m": 197.93263014261015, "window_maxima": { "max_5m": { "gradient_pct": 19.850092223939555, "start_distance_m": 458.0, "end_distance_m": 463.0, "midpoint_distance_m": 460.5, "start_elevation_m": 349.30049104139016, "end_elevation_m": 350.29299565258714, "start_xy": [ 386668.65829325304, 6227956.06384327 ], "end_xy": [ 386671.7642541049, 6227959.981932912 ] }, "max_10m": { "gradient_pct": 17.800797399770545, "start_distance_m": 262.0, "end_distance_m": 272.0, "midpoint_distance_m": 267.0, "start_elevation_m": 328.12361447388025, "end_elevation_m": 329.9036942138573, "start_xy": [ 386547.9155892318, 6227802.236961838 ], "end_xy": [ 386552.90471914713, 6227810.903482634 ] }, "max_20m": { "gradient_pct": 17.612460554363167, "start_distance_m": 257.0, "end_distance_m": 277.0, "midpoint_distance_m": 267.0, "start_elevation_m": 327.22551977546067, "end_elevation_m": 330.7480118863333, "start_xy": [ 386545.42102427414, 6227797.90370144 ], "end_xy": [ 386555.3992841048, 6227815.236743031 ] }, "max_25m": { "gradient_pct": 17.331377783809558, "start_distance_m": 255.0, "end_distance_m": 280.0, "midpoint_distance_m": 267.5, "start_elevation_m": 326.903060334359, "end_elevation_m": 331.2359047803114, "start_xy": [ 386544.42319829104, 6227796.170397282 ], "end_xy": [ 386556.8960230794, 6227817.836699269 ] }, "max_50m": { "gradient_pct": 16.8166621204914, "start_distance_m": 1181.0, "end_distance_m": 1231.0, "midpoint_distance_m": 1206.0, "start_elevation_m": 424.6105880232193, "end_elevation_m": 433.018919083465, "start_xy": [ 387105.70788053895, 6228518.350919955 ], "end_xy": [ 387100.0137481169, 6228567.820661914 ] }, "max_100m": { "gradient_pct": 15.753998551328095, "start_distance_m": 981.0, "end_distance_m": 1081.0, "midpoint_distance_m": 1031.0, "start_elevation_m": 395.2537157367186, "end_elevation_m": 411.0077142880467, "start_xy": [ 386992.7901709692, 6228356.258417304 ], "end_xy": [ 387046.44591791334, 6228440.603310695 ] } }, "window_minima": { "min_5m": { "gradient_pct": -6.467528320762312, "start_distance_m": 463.0, "end_distance_m": 468.0, "midpoint_distance_m": 465.5, "start_elevation_m": 350.29299565258714, "end_elevation_m": 349.969619236549, "start_xy": [ 386671.7642541049, 6227959.981932912 ], "end_xy": [ 386674.85792534595, 6227963.909934726 ] }, "min_10m": { "gradient_pct": -4.675401342142322, "start_distance_m": 1870.0, "end_distance_m": 1880.0, "midpoint_distance_m": 1875.0, "start_elevation_m": 498.0623037348546, "end_elevation_m": 497.59476360064036, "start_xy": [ 387493.07550912746, 6228909.421665009 ], "end_xy": [ 387492.40890844085, 6228899.454452204 ] }, "min_20m": { "gradient_pct": -3.240949852112749, "start_distance_m": 1863.0, "end_distance_m": 1883.0, "midpoint_distance_m": 1873.0, "start_elevation_m": 498.1984014921113, "end_elevation_m": 497.55021152168877, "start_xy": [ 387493.04141529946, 6228916.4112766 ], "end_xy": [ 387492.1049131644, 6228896.469894134 ] }, "min_25m": { "gradient_pct": -2.468312179364375, "start_distance_m": 1860.0, "end_distance_m": 1885.0, "midpoint_distance_m": 1872.5, "start_elevation_m": 498.1580045709668, "end_elevation_m": 497.5409265261257, "start_xy": [ 387492.24168115767, 6228919.302716605 ], "end_xy": [ 387491.9022496467, 6228894.480188754 ] }, "min_50m": { "gradient_pct": 1.5502708218383532, "start_distance_m": 1839.0, "end_distance_m": 1889.0, "midpoint_distance_m": 1864.0, "start_elevation_m": 496.81277161316024, "end_elevation_m": 497.5879070240794, "start_xy": [ 387484.1791202459, 6228938.315438394 ], "end_xy": [ 387491.49692261143, 6228890.500777994 ] }, "min_100m": { "gradient_pct": 5.371509929852948, "start_distance_m": 524.0, "end_distance_m": 624.0, "midpoint_distance_m": 574.0, "start_elevation_m": 356.35095727739497, "end_elevation_m": 361.7224672072479, "start_xy": [ 386708.4648738029, 6228008.6747380905 ], "end_xy": [ 386773.6505299768, 6228083.4457800025 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 38.27049588271905, "start_distance_m": 461.0, "end_distance_m": 463.0, "midpoint_distance_m": 462.0, "start_elevation_m": 349.52758573493276, "end_elevation_m": 350.29299565258714, "start_xy": [ 386670.52678560856, 6227958.4107321855 ], "end_xy": [ 386671.7642541049, 6227959.981932912 ] }, "max_3m": { "gradient_pct": 27.6028625659175, "start_distance_m": 460.0, "end_distance_m": 463.0, "midpoint_distance_m": 461.5, "start_elevation_m": 349.4649097756096, "end_elevation_m": 350.29299565258714, "start_xy": [ 386669.90805136034, 6227957.625131823 ], "end_xy": [ 386671.7642541049, 6227959.981932912 ] } }, "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": 0.06, "obstruction_max_height_m": 18.36, "flagged_windows_m": [ 2, 3, 5 ] }, "review": [], "extent": [] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "06fa4c370391597f015858e97dcf01ca2f5b3640", "code_git_dirty": "false", "analysis_version": "0.1.0", "analysis_config_digest": "sha256:0048c2bbb24ab95e", "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-pyr1", "road_pbf": "block-batch-fr-pyr1.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:c54ac68b3f57b41b" }, "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_E386-N6227_0m5@21LHD1FR-2025-03-21.tif", "data/cache/fr/ign-lidarhd_dtm_E386-N6228_0m5@21LHD1FR-2025-03-21.tif", "data/cache/fr/ign-lidarhd_dtm_E387-N6228_0m5@21LHD1FR-2025-03-21.tif" ], "calculated_at": "2026-09-20T06:57:47+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr1.osm.pbf", "osm_snapshot": "", "run_id": "fr-pyr1", "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": [ "E386-N6227", "E386-N6228", "E387-N6228" ], "elevation_blocks": [ "21LHD1FR@2025-03-21" ], "ign_dalles": [ "LHD_FXX_0386_6228_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0386_6229_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0387_6229_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD1FR" ], "ign_editions": [ "2025-03-21" ], "ign_dsm_edition": { "LHD_FXX_0386_6228_MNT_O_0M50_LAMB93_IGN69": "2025-03-21", "LHD_FXX_0386_6229_MNT_O_0M50_LAMB93_IGN69": "2025-03-21", "LHD_FXX_0387_6229_MNT_O_0M50_LAMB93_IGN69": "2025-03-21" }, "route_cut_m": 1889.4, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 81, "stations_resolved": 81, "width_median_m": 4.25, "width_p10_m": 3.25, "width_min_m": 2.75, "width_max_m": 12.0, "bounded_share": 0.556, "unbounded_share": 0.444, "confidence_median": 0.515, "width_median_bounded_m": 4.25, "window_m": [ 255.0, 280.0 ], "width_at_max25_m": 5.0, "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": 81, "stations_resolved": 81, "width_median_m": 5.5, "width_p10_m": 2.5, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.827, "unbounded_share": 0.173, "confidence_median": 1.0, "width_median_bounded_m": 5.25, "window_m": [ 255.0, 280.0 ], "width_at_max25_m": 9.12, "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": "Haux", "county": "Pyr\u00e9n\u00e9es-Atlantiques", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }