{ "ocl_version": "0.1.0", "name": "Chemin Lahaille", "slug": "chemin-lahaille", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 24.203374944802647, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 418.0, "end_distance_m": 420.0, "start_elevation_m": 204.481200733907, "end_elevation_m": 204.96526823280306, "min_gradient_pct": -7.844725166631861 }, { "window_m": 3.0, "max_gradient_pct": 22.69022769465323, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 88.0, "end_distance_m": 91.0, "start_elevation_m": 171.05996871772066, "end_elevation_m": 171.74067554856026, "min_gradient_pct": -1.5223931461576967 }, { "window_m": 5.0, "max_gradient_pct": 22.326787513823092, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 77.0, "end_distance_m": 82.0, "start_elevation_m": 168.65141310793288, "end_elevation_m": 169.76775248362404, "min_gradient_pct": -0.24907745837538187 }, { "window_m": 10.0, "max_gradient_pct": 21.907770431494384, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 76.0, "end_distance_m": 86.0, "start_elevation_m": 168.44983218136636, "end_elevation_m": 170.6406092245158, "min_gradient_pct": 0.787800491676478 }, { "window_m": 20.0, "max_gradient_pct": 21.467750957722558, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 75.0, "end_distance_m": 95.0, "start_elevation_m": 168.27426280542707, "end_elevation_m": 172.56781299697158, "min_gradient_pct": 1.476118836905158 }, { "window_m": 25.0, "max_gradient_pct": 21.16428924003867, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 70.0, "end_distance_m": 95.0, "start_elevation_m": 167.27674068696192, "end_elevation_m": 172.56781299697158, "min_gradient_pct": 1.7628769908092181 }, { "window_m": 50.0, "max_gradient_pct": 19.37150564924889, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 48.0, "end_distance_m": 98.0, "start_elevation_m": 163.36141920539418, "end_elevation_m": 173.04717203001863, "min_gradient_pct": 2.539028379938543 }, { "window_m": 100.0, "max_gradient_pct": 17.926645362586584, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 660.0, "end_distance_m": 760.0, "start_elevation_m": 223.70534444742117, "end_elevation_m": 241.63198981000775, "min_gradient_pct": 4.343625236997667 } ], "shape": { "ascent_concentration": 0.335, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 221.0, "shape_class": "sustained" }, "length_m": 935.2000000003156, "start_elevation_m": 158.73072057714316, "end_elevation_m": 258.81073839005694, "endpoint_gain_m": 100.08001781291378, "overall_gradient_pct": 10.701456139101795, "accumulated_ascent_m": 100.61064644208054, "window_maxima": { "max_5m": { "gradient_pct": 22.326787513823092, "start_distance_m": 77.0, "end_distance_m": 82.0, "midpoint_distance_m": 79.5, "start_elevation_m": 168.65141310793288, "end_elevation_m": 169.76775248362404, "start_xy": [ 446517.7224164559, 6276759.735234041 ], "end_xy": [ 446517.8275686326, 6276754.748669939 ] }, "max_10m": { "gradient_pct": 21.907770431494384, "start_distance_m": 76.0, "end_distance_m": 86.0, "midpoint_distance_m": 81.0, "start_elevation_m": 168.44983218136636, "end_elevation_m": 170.6406092245158, "start_xy": [ 446517.9652627372, 6276760.705298823 ], "end_xy": [ 446517.98555670306, 6276750.751791186 ] }, "max_20m": { "gradient_pct": 21.467750957722558, "start_distance_m": 75.0, "end_distance_m": 95.0, "midpoint_distance_m": 85.0, "start_elevation_m": 168.27426280542707, "end_elevation_m": 172.56781299697158, "start_xy": [ 446518.20810901845, 6276761.675363607 ], "end_xy": [ 446520.52372618584, 6276742.214454943 ] }, "max_25m": { "gradient_pct": 21.16428924003867, "start_distance_m": 70.0, "end_distance_m": 95.0, "midpoint_distance_m": 82.5, "start_elevation_m": 167.27674068696192, "end_elevation_m": 172.56781299697158, "start_xy": [ 446519.42234042473, 6276766.525687523 ], "end_xy": [ 446520.52372618584, 6276742.214454943 ] }, "max_50m": { "gradient_pct": 19.37150564924889, "start_distance_m": 48.0, "end_distance_m": 98.0, "midpoint_distance_m": 73.0, "start_elevation_m": 163.36141920539418, "end_elevation_m": 173.04717203001863, "start_xy": [ 446524.76495861233, 6276787.867112754 ], "end_xy": [ 446521.61440127844, 6276739.419740675 ] }, "max_100m": { "gradient_pct": 17.926645362586584, "start_distance_m": 660.0, "end_distance_m": 760.0, "midpoint_distance_m": 710.0, "start_elevation_m": 223.70534444742117, "end_elevation_m": 241.63198981000775, "start_xy": [ 446359.5601410861, 6276250.278702867 ], "end_xy": [ 446261.54124892695, 6276254.557589411 ] } }, "window_minima": { "min_5m": { "gradient_pct": -0.24907745837538187, "start_distance_m": 386.0, "end_distance_m": 391.0, "midpoint_distance_m": 388.5, "start_elevation_m": 203.21744210513586, "end_elevation_m": 203.2049882322171, "start_xy": [ 446375.6207316284, 6276505.440778658 ], "end_xy": [ 446373.92503833445, 6276500.737096668 ] }, "min_10m": { "gradient_pct": 0.787800491676478, "start_distance_m": 386.0, "end_distance_m": 396.0, "midpoint_distance_m": 391.0, "start_elevation_m": 203.21744210513586, "end_elevation_m": 203.2962221543035, "start_xy": [ 446375.6207316284, 6276505.440778658 ], "end_xy": [ 446372.2293450405, 6276496.03341468 ] }, "min_20m": { "gradient_pct": 1.476118836905158, "start_distance_m": 384.0, "end_distance_m": 404.0, "midpoint_distance_m": 394.0, "start_elevation_m": 203.173536235312, "end_elevation_m": 203.46876000269305, "start_xy": [ 446376.299008946, 6276507.322251453 ], "end_xy": [ 446371.02051081095, 6276488.194417569 ] }, "min_25m": { "gradient_pct": 1.7628769908092181, "start_distance_m": 377.0, "end_distance_m": 402.0, "midpoint_distance_m": 389.5, "start_elevation_m": 202.9861059200596, "end_elevation_m": 203.4268251677619, "start_xy": [ 446378.67297955754, 6276513.907406238 ], "end_xy": [ 446371.1492753669, 6276490.190268187 ] }, "min_50m": { "gradient_pct": 2.539028379938543, "start_distance_m": 355.0, "end_distance_m": 405.0, "midpoint_distance_m": 380.0, "start_elevation_m": 202.22908937672926, "end_elevation_m": 203.49860356669853, "start_xy": [ 446386.6449378411, 6276534.412085102 ], "end_xy": [ 446370.95612853294, 6276487.19649226 ] }, "min_100m": { "gradient_pct": 4.343625236997667, "start_distance_m": 313.0, "end_distance_m": 413.0, "midpoint_distance_m": 363.0, "start_elevation_m": 199.61418591483604, "end_elevation_m": 203.9578111518337, "start_xy": [ 446399.221878696, 6276574.396258634 ], "end_xy": [ 446370.4410703089, 6276479.213089788 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 24.203374944802647, "start_distance_m": 418.0, "end_distance_m": 420.0, "midpoint_distance_m": 419.0, "start_elevation_m": 204.481200733907, "end_elevation_m": 204.96526823280306, "start_xy": [ 446370.1191589189, 6276474.223463244 ], "end_xy": [ 446369.99039436295, 6276472.227612626 ] }, "max_3m": { "gradient_pct": 22.69022769465323, "start_distance_m": 88.0, "end_distance_m": 91.0, "midpoint_distance_m": 89.5, "start_elevation_m": 171.05996871772066, "end_elevation_m": 171.74067554856026, "start_xy": [ 446518.06455073826, 6276748.753351809 ], "end_xy": [ 446519.06949272903, 6276745.940740635 ] } }, "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": 0.331, "obstruction_max_height_m": 18.91, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50, 100 ] }, "review": [], "extent": [ "may_start_earlier" ] }, "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-pyr2", "road_pbf": "block-batch-fr-pyr2.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_E446-N6275_0m5@21LHD1GQ-2026-03-20.tif", "data/cache/fr/ign-lidarhd_dtm_E446-N6276_0m5@21LHD1GQ-2025-04-11.tif" ], "calculated_at": "2026-09-20T07:23:37+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr2.osm.pbf", "osm_snapshot": "", "run_id": "fr-pyr2", "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": [ "E446-N6275", "E446-N6276" ], "elevation_blocks": [ "21LHD1GQ@2025-04-11", "21LHD1GQ@2026-03-20" ], "ign_dalles": [ "LHD_FXX_0446_6276_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0446_6277_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD1GQ" ], "ign_editions": [ "2025-04-11", "2026-03-20" ], "ign_dsm_edition": { "LHD_FXX_0446_6276_MNT_O_0M50_LAMB93_IGN69": "2026-03-20", "LHD_FXX_0446_6277_MNT_O_0M50_LAMB93_IGN69": "2025-04-11" }, "route_cut_m": 935.2, "climb_origin": "discovered", "structure_own_ways": 3, "carriageway": { "stations": 43, "stations_resolved": 43, "width_median_m": 5.75, "width_p10_m": 4.05, "width_min_m": 2.0, "width_max_m": 10.75, "bounded_share": 0.209, "unbounded_share": 0.791, "confidence_median": 0.0, "width_median_bounded_m": 5.75, "window_m": [ 70.0, 95.0 ], "width_at_max25_m": 5.75, "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": 43, "stations_resolved": 43, "width_median_m": 5.25, "width_p10_m": 1.0, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.674, "unbounded_share": 0.326, "confidence_median": 1.0, "width_median_bounded_m": 2.25, "window_m": [ 70.0, 95.0 ], "width_at_max25_m": 1.38, "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": "Aurions-Idernes", "county": "Pyr\u00e9n\u00e9es-Atlantiques", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }