{ "ocl_version": "0.1.0", "name": "Chemin de l'\u00c9cole", "slug": "chemin-de-l-ecole-4", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 29.264610077792952, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 465.0, "end_distance_m": 467.0, "start_elevation_m": 194.47594256440274, "end_elevation_m": 195.0612347659586, "min_gradient_pct": -1.551238043762737 }, { "window_m": 3.0, "max_gradient_pct": 27.641760585261938, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 465.0, "end_distance_m": 468.0, "start_elevation_m": 194.47594256440274, "end_elevation_m": 195.3051953819606, "min_gradient_pct": -1.813831074248166 }, { "window_m": 5.0, "max_gradient_pct": 26.509430279018602, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 463.0, "end_distance_m": 468.0, "start_elevation_m": 193.97972386800967, "end_elevation_m": 195.3051953819606, "min_gradient_pct": -1.0679751235397816 }, { "window_m": 10.0, "max_gradient_pct": 25.207332259343502, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 461.0, "end_distance_m": 471.0, "start_elevation_m": 193.47932798986966, "end_elevation_m": 196.000061215804, "min_gradient_pct": -0.6023489127244375 }, { "window_m": 20.0, "max_gradient_pct": 22.029358121646254, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 451.0, "end_distance_m": 471.0, "start_elevation_m": 191.59418959147476, "end_elevation_m": 196.000061215804, "min_gradient_pct": 0.35706695046030745 }, { "window_m": 25.0, "max_gradient_pct": 21.723326033987746, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 446.0, "end_distance_m": 471.0, "start_elevation_m": 190.56922970730707, "end_elevation_m": 196.000061215804, "min_gradient_pct": 0.5361807132171634 }, { "window_m": 50.0, "max_gradient_pct": 20.923305330389667, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 421.0, "end_distance_m": 471.0, "start_elevation_m": 185.53840855060918, "end_elevation_m": 196.000061215804, "min_gradient_pct": 1.1869509719608118 }, { "window_m": 100.0, "max_gradient_pct": 19.68612609470091, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 398.0, "end_distance_m": 498.0, "start_elevation_m": 181.19610537535598, "end_elevation_m": 200.8822314700569, "min_gradient_pct": 2.0676570534959637 } ], "shape": { "ascent_concentration": 0.636, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 180.0, "shape_class": "stepped" }, "length_m": 592.473449096407, "start_elevation_m": 163.75654580333972, "end_elevation_m": 205.55832456113092, "endpoint_gain_m": 41.8017787577912, "overall_gradient_pct": 7.0554687001660445, "accumulated_ascent_m": 42.253134124656356, "window_maxima": { "max_5m": { "gradient_pct": 26.509430279018602, "start_distance_m": 463.0, "end_distance_m": 468.0, "midpoint_distance_m": 465.5, "start_elevation_m": 193.97972386800967, "end_elevation_m": 195.3051953819606, "start_xy": [ 417826.5162316852, 6263069.605472375 ], "end_xy": [ 417821.51838137174, 6263069.75207471 ] }, "max_10m": { "gradient_pct": 25.207332259343502, "start_distance_m": 461.0, "end_distance_m": 471.0, "midpoint_distance_m": 466.0, "start_elevation_m": 193.47932798986966, "end_elevation_m": 196.000061215804, "start_xy": [ 417828.5153718105, 6263069.54683144 ], "end_xy": [ 417818.560149877, 6263070.066940606 ] }, "max_20m": { "gradient_pct": 22.029358121646254, "start_distance_m": 451.0, "end_distance_m": 471.0, "midpoint_distance_m": 461.0, "start_elevation_m": 191.59418959147476, "end_elevation_m": 196.000061215804, "start_xy": [ 417838.49791550887, 6263070.003620351 ], "end_xy": [ 417818.560149877, 6263070.066940606 ] }, "max_25m": { "gradient_pct": 21.723326033987746, "start_distance_m": 446.0, "end_distance_m": 471.0, "midpoint_distance_m": 458.5, "start_elevation_m": 190.56922970730707, "end_elevation_m": 196.000061215804, "start_xy": [ 417843.2502746295, 6263068.449566687 ], "end_xy": [ 417818.560149877, 6263070.066940606 ] }, "max_50m": { "gradient_pct": 20.923305330389667, "start_distance_m": 421.0, "end_distance_m": 471.0, "midpoint_distance_m": 446.0, "start_elevation_m": 185.53840855060918, "end_elevation_m": 196.000061215804, "start_xy": [ 417867.01207023277, 6263060.679298371 ], "end_xy": [ 417818.560149877, 6263070.066940606 ] }, "max_100m": { "gradient_pct": 19.68612609470091, "start_distance_m": 398.0, "end_distance_m": 498.0, "midpoint_distance_m": 448.0, "start_elevation_m": 181.19610537535598, "end_elevation_m": 200.8822314700569, "start_xy": [ 417888.8729221878, 6263053.53065152 ], "end_xy": [ 417794.35443541536, 6263081.756559602 ] } }, "window_minima": { "min_5m": { "gradient_pct": -1.0679751235397816, "start_distance_m": 4.0, "end_distance_m": 9.0, "midpoint_distance_m": 6.5, "start_elevation_m": 163.7413624308624, "end_elevation_m": 163.68796367468542, "start_xy": [ 418037.44635548186, 6263291.76882131 ], "end_xy": [ 418037.4438581852, 6263286.794303303 ] }, "min_10m": { "gradient_pct": -0.6023489127244375, "start_distance_m": 1.0, "end_distance_m": 11.0, "midpoint_distance_m": 6.0, "start_elevation_m": 163.7552715455526, "end_elevation_m": 163.69503665428016, "start_xy": [ 418036.97433887044, 6263294.731455327 ], "end_xy": [ 418037.31431605504, 6263284.798503003 ] }, "min_20m": { "gradient_pct": 0.35706695046030745, "start_distance_m": 0.0, "end_distance_m": 20.0, "midpoint_distance_m": 10.0, "start_elevation_m": 163.75654580333972, "end_elevation_m": 163.82795919343178, "start_xy": [ 418036.817, 6263295.719 ], "end_xy": [ 418036.73137646937, 6263275.817401654 ] }, "min_25m": { "gradient_pct": 0.5361807132171634, "start_distance_m": 165.0, "end_distance_m": 190.0, "midpoint_distance_m": 177.5, "start_elevation_m": 167.64730370118784, "end_elevation_m": 167.78134887949213, "start_xy": [ 418036.9752593665, 6263133.5080226315 ], "end_xy": [ 418030.5561343041, 6263109.398574621 ] }, "min_50m": { "gradient_pct": 1.1869509719608118, "start_distance_m": 145.0, "end_distance_m": 195.0, "midpoint_distance_m": 170.0, "start_elevation_m": 167.2628649606352, "end_elevation_m": 167.8563404466156, "start_xy": [ 418043.58122699626, 6263152.38555403 ], "end_xy": [ 418029.5276405091, 6263104.505497828 ] }, "min_100m": { "gradient_pct": 2.0676570534959637, "start_distance_m": 95.0, "end_distance_m": 195.0, "midpoint_distance_m": 145.0, "start_elevation_m": 165.78868339311964, "end_elevation_m": 167.8563404466156, "start_xy": [ 418033.3113309418, 6263201.0566366725 ], "end_xy": [ 418029.5276405091, 6263104.505497828 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 29.264610077792952, "start_distance_m": 465.0, "end_distance_m": 467.0, "midpoint_distance_m": 466.0, "start_elevation_m": 194.47594256440274, "end_elevation_m": 195.0612347659586, "start_xy": [ 417824.5170915598, 6263069.664113308 ], "end_xy": [ 417822.5179514344, 6263069.722754243 ] }, "max_3m": { "gradient_pct": 27.641760585261938, "start_distance_m": 465.0, "end_distance_m": 468.0, "midpoint_distance_m": 466.5, "start_elevation_m": 194.47594256440274, "end_elevation_m": 195.3051953819606, "start_xy": [ 417824.5170915598, 6263069.664113308 ], "end_xy": [ 417821.51838137174, 6263069.75207471 ] } }, "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": 0.185, "obstruction_max_height_m": 20.65, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50, 100 ] }, "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_E417-N6263_0m5@21LHD1FQ-2025-09-15.tif", "data/cache/fr/ign-lidarhd_dtm_E418-N6263_0m5@21LHD1FQ-2025-09-15.tif" ], "calculated_at": "2026-09-20T06:27:10+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": [ "E417-N6263", "E418-N6263" ], "elevation_blocks": [ "21LHD1FQ@2025-09-15" ], "ign_dalles": [ "LHD_FXX_0417_6264_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0418_6264_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD1FQ" ], "ign_editions": [ "2025-09-15" ], "ign_dsm_edition": { "LHD_FXX_0417_6264_MNT_O_0M50_LAMB93_IGN69": "2025-09-15", "LHD_FXX_0418_6264_MNT_O_0M50_LAMB93_IGN69": "2025-09-15" }, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 30, "stations_resolved": 30, "width_median_m": 6.38, "width_p10_m": 2.25, "width_min_m": 1.0, "width_max_m": 11.25, "bounded_share": 0.333, "unbounded_share": 0.667, "confidence_median": 0.0, "width_median_bounded_m": 4.25, "window_m": [ 446.0, 471.0 ], "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": 30, "stations_resolved": 30, "width_median_m": 5.75, "width_p10_m": 1.0, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.7, "unbounded_share": 0.3, "confidence_median": 1.0, "width_median_bounded_m": 3.25, "window_m": [ 446.0, 471.0 ], "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": "Viellenave-d'Arthez", "county": "Pyr\u00e9n\u00e9es-Atlantiques", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }