{ "ocl_version": "0.1.0", "name": "Chemin de la Falaine", "slug": "chemin-de-la-falaine", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 22.604826725034854, "diagnostic": true, "flags": [], "start_distance_m": 367.0, "end_distance_m": 369.0, "start_elevation_m": 262.35748615273314, "end_elevation_m": 262.80958268723384, "min_gradient_pct": -8.579718991396135 }, { "window_m": 3.0, "max_gradient_pct": 22.063526769181863, "diagnostic": true, "flags": [], "start_distance_m": 352.0, "end_distance_m": 355.0, "start_elevation_m": 259.15475948805226, "end_elevation_m": 259.8166652911277, "min_gradient_pct": -8.36575554828869 }, { "window_m": 5.0, "max_gradient_pct": 21.950934474050428, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 348.0, "end_distance_m": 353.0, "start_elevation_m": 258.2856244459455, "end_elevation_m": 259.383171169648, "min_gradient_pct": -8.30420159496839 }, { "window_m": 10.0, "max_gradient_pct": 21.884585554370233, "diagnostic": false, "flags": [], "start_distance_m": 348.0, "end_distance_m": 358.0, "start_elevation_m": 258.2856244459455, "end_elevation_m": 260.4740830013825, "min_gradient_pct": -7.499395979808696 }, { "window_m": 20.0, "max_gradient_pct": 21.699762627201267, "diagnostic": false, "flags": [], "start_distance_m": 345.0, "end_distance_m": 365.0, "start_elevation_m": 257.62947135387185, "end_elevation_m": 261.9694238793121, "min_gradient_pct": -7.047760316515621 }, { "window_m": 25.0, "max_gradient_pct": 21.50047201942084, "diagnostic": false, "flags": [], "start_distance_m": 341.0, "end_distance_m": 366.0, "start_elevation_m": 256.7932345407835, "end_elevation_m": 262.1683525456387, "min_gradient_pct": -7.065105711089927 }, { "window_m": 50.0, "max_gradient_pct": 20.64293161525865, "diagnostic": false, "flags": [], "start_distance_m": 332.0, "end_distance_m": 382.0, "start_elevation_m": 255.00308168319955, "end_elevation_m": 265.3245474908289, "min_gradient_pct": -2.5537296369009255 }, { "window_m": 100.0, "max_gradient_pct": 17.670938369228907, "diagnostic": false, "flags": [], "start_distance_m": 299.0, "end_distance_m": 399.0, "start_elevation_m": 250.16900266864798, "end_elevation_m": 267.8399410378769, "min_gradient_pct": 2.8519434408948428 } ], "shape": { "ascent_concentration": 0.464, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 192.0, "shape_class": "stepped" }, "length_m": 628.6385589742092, "start_elevation_m": 228.59143410168934, "end_elevation_m": 278.3024825981661, "endpoint_gain_m": 49.711048496476735, "overall_gradient_pct": 7.9077313643619815, "accumulated_ascent_m": 51.86553185282247, "window_maxima": { "max_5m": { "gradient_pct": 21.950934474050428, "start_distance_m": 348.0, "end_distance_m": 353.0, "midpoint_distance_m": 350.5, "start_elevation_m": 258.2856244459455, "end_elevation_m": 259.383171169648, "start_xy": [ 525446.5132809542, 6264030.651704434 ], "end_xy": [ 525446.639626656, 6264035.650107856 ] }, "max_10m": { "gradient_pct": 21.884585554370233, "start_distance_m": 348.0, "end_distance_m": 358.0, "midpoint_distance_m": 353.0, "start_elevation_m": 258.2856244459455, "end_elevation_m": 260.4740830013825, "start_xy": [ 525446.5132809542, 6264030.651704434 ], "end_xy": [ 525446.7659723576, 6264040.6485112775 ] }, "max_20m": { "gradient_pct": 21.699762627201267, "start_distance_m": 345.0, "end_distance_m": 365.0, "midpoint_distance_m": 355.0, "start_elevation_m": 257.62947135387185, "end_elevation_m": 261.9694238793121, "start_xy": [ 525446.4374735332, 6264027.6526623815 ], "end_xy": [ 525446.9428563401, 6264047.646276068 ] }, "max_25m": { "gradient_pct": 21.50047201942084, "start_distance_m": 341.0, "end_distance_m": 366.0, "midpoint_distance_m": 353.5, "start_elevation_m": 256.7932345407835, "end_elevation_m": 262.1683525456387, "start_xy": [ 525446.3363969718, 6264023.653939645 ], "end_xy": [ 525446.9681254803, 6264048.645956752 ] }, "max_50m": { "gradient_pct": 20.64293161525865, "start_distance_m": 332.0, "end_distance_m": 382.0, "midpoint_distance_m": 357.0, "start_elevation_m": 255.00308168319955, "end_elevation_m": 265.3245474908289, "start_xy": [ 525446.1089747087, 6264014.656813486 ], "end_xy": [ 525447.372431726, 6264064.640847701 ] }, "max_100m": { "gradient_pct": 17.670938369228907, "start_distance_m": 299.0, "end_distance_m": 399.0, "midpoint_distance_m": 349.0, "start_elevation_m": 250.16900266864798, "end_elevation_m": 267.8399410378769, "start_xy": [ 525447.4971561987, 6263981.86282444 ], "end_xy": [ 525450.1956235529, 6264081.284865606 ] } }, "window_minima": { "min_5m": { "gradient_pct": -8.30420159496839, "start_distance_m": 623.0, "end_distance_m": 628.0, "midpoint_distance_m": 625.5, "start_elevation_m": 278.7731479858184, "end_elevation_m": 278.35793790607, "start_xy": [ 525517.5049546779, 6264285.915209725 ], "end_xy": [ 525519.811435229, 6264290.3514409475 ] }, "min_10m": { "gradient_pct": -7.499395979808696, "start_distance_m": 618.0, "end_distance_m": 628.0, "midpoint_distance_m": 623.0, "start_elevation_m": 279.10787750405086, "end_elevation_m": 278.35793790607, "start_xy": [ 525515.1984741268, 6264281.478978501 ], "end_xy": [ 525519.811435229, 6264290.3514409475 ] }, "min_20m": { "gradient_pct": -7.047760316515621, "start_distance_m": 608.0, "end_distance_m": 628.0, "midpoint_distance_m": 618.0, "start_elevation_m": 279.7674899693731, "end_elevation_m": 278.35793790607, "start_xy": [ 525510.8777200576, 6264272.4642222095 ], "end_xy": [ 525519.811435229, 6264290.3514409475 ] }, "min_25m": { "gradient_pct": -7.065105711089927, "start_distance_m": 603.0, "end_distance_m": 628.0, "midpoint_distance_m": 615.5, "start_elevation_m": 280.1242143338425, "end_elevation_m": 278.35793790607, "start_xy": [ 525508.8075968333, 6264267.91289385 ], "end_xy": [ 525519.811435229, 6264290.3514409475 ] }, "min_50m": { "gradient_pct": -2.5537296369009255, "start_distance_m": 578.0, "end_distance_m": 628.0, "midpoint_distance_m": 603.0, "start_elevation_m": 279.63480272452045, "end_elevation_m": 278.35793790607, "start_xy": [ 525499.2782397462, 6264244.805147625 ], "end_xy": [ 525519.811435229, 6264290.3514409475 ] }, "min_100m": { "gradient_pct": 2.8519434408948428, "start_distance_m": 528.0, "end_distance_m": 628.0, "midpoint_distance_m": 578.0, "start_elevation_m": 275.50599446517515, "end_elevation_m": 278.35793790607, "start_xy": [ 525490.6653173197, 6264195.958122282 ], "end_xy": [ 525519.811435229, 6264290.3514409475 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 22.604826725034854, "start_distance_m": 367.0, "end_distance_m": 369.0, "midpoint_distance_m": 368.0, "start_elevation_m": 262.35748615273314, "end_elevation_m": 262.80958268723384, "start_xy": [ 525446.9933946207, 6264049.645637436 ], "end_xy": [ 525447.0439329015, 6264051.644998805 ] }, "max_3m": { "gradient_pct": 22.063526769181863, "start_distance_m": 352.0, "end_distance_m": 355.0, "midpoint_distance_m": 353.5, "start_elevation_m": 259.15475948805226, "end_elevation_m": 259.8166652911277, "start_xy": [ 525446.6143575156, 6264034.650427172 ], "end_xy": [ 525446.6901649366, 6264037.649469225 ] } }, "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": 0.043, "obstruction_max_height_m": 9.96, "flagged_windows_m": [ 5 ] }, "review": [], "extent": [ "descends_at_end" ] }, "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_E525-N6263_0m5@22LHD1HQ-2025-03-25.tif", "data/cache/fr/ign-lidarhd_dtm_E525-N6264_0m5@22LHD1HQ-2025-03-25.tif" ], "calculated_at": "2026-09-20T07:19:45+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": [ "E525-N6263", "E525-N6264" ], "elevation_blocks": [ "22LHD1HQ@2025-03-25" ], "ign_dalles": [ "LHD_FXX_0525_6264_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0525_6265_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD1HQ" ], "ign_editions": [ "2025-03-25" ], "ign_dsm_edition": { "LHD_FXX_0525_6264_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0525_6265_MNT_O_0M50_LAMB93_IGN69": "2025-03-25" }, "climb_origin": "discovered", "structure_own_ways": 2, "carriageway": { "stations": 32, "stations_resolved": 32, "width_median_m": 5.62, "width_p10_m": 3.52, "width_min_m": 2.75, "width_max_m": 9.25, "bounded_share": 0.125, "unbounded_share": 0.875, "confidence_median": 0.0, "width_median_bounded_m": 5.38, "window_m": [ 341.0, 366.0 ], "width_at_max25_m": 6.0, "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": 32, "stations_resolved": 32, "width_median_m": 8.12, "width_p10_m": 2.03, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.5, "unbounded_share": 0.5, "confidence_median": 0.434, "width_median_bounded_m": 5.5, "window_m": [ 341.0, 366.0 ], "width_at_max25_m": 5.25, "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": "Sauveterre", "county": "Gers", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }