{ "ocl_version": "0.1.0", "name": "Chemin des Ifs", "slug": "chemin-des-ifs", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 25.004186958204855, "diagnostic": true, "flags": [], "start_distance_m": 448.0, "end_distance_m": 450.0, "start_elevation_m": 310.61901928811596, "end_elevation_m": 311.11910302728006, "min_gradient_pct": -1.7630898381838733 }, { "window_m": 3.0, "max_gradient_pct": 23.094005878323287, "diagnostic": true, "flags": [], "start_distance_m": 484.0, "end_distance_m": 487.0, "start_elevation_m": 318.20845161427997, "end_elevation_m": 318.90127179062966, "min_gradient_pct": -1.825099850860094 }, { "window_m": 5.0, "max_gradient_pct": 23.205876121115807, "diagnostic": false, "flags": [], "start_distance_m": 445.0, "end_distance_m": 450.0, "start_elevation_m": 309.95880922122427, "end_elevation_m": 311.11910302728006, "min_gradient_pct": -1.2760801175056713 }, { "window_m": 10.0, "max_gradient_pct": 22.398781844321434, "diagnostic": false, "flags": [], "start_distance_m": 445.0, "end_distance_m": 455.0, "start_elevation_m": 309.95880922122427, "end_elevation_m": 312.1986874056564, "min_gradient_pct": 0.9496551873075987 }, { "window_m": 20.0, "max_gradient_pct": 21.975436140778015, "diagnostic": false, "flags": [], "start_distance_m": 474.0, "end_distance_m": 494.0, "start_elevation_m": 316.04181395810065, "end_elevation_m": 320.43690118625625, "min_gradient_pct": 1.4263113235011815 }, { "window_m": 25.0, "max_gradient_pct": 21.813677465478122, "diagnostic": false, "flags": [], "start_distance_m": 474.0, "end_distance_m": 499.0, "start_elevation_m": 316.04181395810065, "end_elevation_m": 321.4952333244702, "min_gradient_pct": 1.4652633430760034 }, { "window_m": 50.0, "max_gradient_pct": 21.390572040797565, "diagnostic": false, "flags": [], "start_distance_m": 444.0, "end_distance_m": 494.0, "start_elevation_m": 309.74161516585747, "end_elevation_m": 320.43690118625625, "min_gradient_pct": 1.7507617125482966 }, { "window_m": 100.0, "max_gradient_pct": 20.553051838520613, "diagnostic": false, "flags": [], "start_distance_m": 407.0, "end_distance_m": 507.0, "start_elevation_m": 302.623083858454, "end_elevation_m": 323.1761356969746, "min_gradient_pct": 2.3446438990305865 } ], "shape": { "ascent_concentration": 0.43, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 196.0, "shape_class": "sustained" }, "length_m": 720.9999999999719, "start_elevation_m": 257.57381244531047, "end_elevation_m": 337.10437199731473, "endpoint_gain_m": 79.53055955200426, "overall_gradient_pct": 11.030590783912254, "accumulated_ascent_m": 79.65893009988508, "window_maxima": { "max_5m": { "gradient_pct": 23.205876121115807, "start_distance_m": 445.0, "end_distance_m": 450.0, "midpoint_distance_m": 447.5, "start_elevation_m": 309.95880922122427, "end_elevation_m": 311.11910302728006, "start_xy": [ 821889.9585293602, 6536763.988966245 ], "end_xy": [ 821894.9211835958, 6536763.378996624 ] }, "max_10m": { "gradient_pct": 22.398781844321434, "start_distance_m": 445.0, "end_distance_m": 455.0, "midpoint_distance_m": 450.0, "start_elevation_m": 309.95880922122427, "end_elevation_m": 312.1986874056564, "start_xy": [ 821889.9585293602, 6536763.988966245 ], "end_xy": [ 821899.8838378312, 6536762.769027002 ] }, "max_20m": { "gradient_pct": 21.975436140778015, "start_distance_m": 474.0, "end_distance_m": 494.0, "midpoint_distance_m": 484.0, "start_elevation_m": 316.04181395810065, "end_elevation_m": 320.43690118625625, "start_xy": [ 821918.7419239259, 6536760.45114244 ], "end_xy": [ 821938.6023083976, 6536758.097193365 ] }, "max_25m": { "gradient_pct": 21.813677465478122, "start_distance_m": 474.0, "end_distance_m": 499.0, "midpoint_distance_m": 486.5, "start_elevation_m": 316.04181395810065, "end_elevation_m": 321.4952333244702, "start_xy": [ 821918.7419239259, 6536760.45114244 ], "end_xy": [ 821943.575257303, 6536757.577790646 ] }, "max_50m": { "gradient_pct": 21.390572040797565, "start_distance_m": 444.0, "end_distance_m": 494.0, "midpoint_distance_m": 469.0, "start_elevation_m": 309.74161516585747, "end_elevation_m": 320.43690118625625, "start_xy": [ 821888.9659985132, 6536764.11096017 ], "end_xy": [ 821938.6023083976, 6536758.097193365 ] }, "max_100m": { "gradient_pct": 20.553051838520613, "start_distance_m": 407.0, "end_distance_m": 507.0, "midpoint_distance_m": 457.0, "start_elevation_m": 302.623083858454, "end_elevation_m": 323.1761356969746, "start_xy": [ 821852.0508487155, 6536763.506321029 ], "end_xy": [ 821951.5319755515, 6536756.746746294 ] } }, "window_minima": { "min_5m": { "gradient_pct": -1.2760801175056713, "start_distance_m": 0.0, "end_distance_m": 5.0, "midpoint_distance_m": 2.5, "start_elevation_m": 257.57381244531047, "end_elevation_m": 257.5100084394352, "start_xy": [ 821571.423, 6536716.568 ], "end_xy": [ 821576.1994230094, 6536718.04643946 ] }, "min_10m": { "gradient_pct": 0.9496551873075987, "start_distance_m": 711.0, "end_distance_m": 721.0, "midpoint_distance_m": 716.0, "start_elevation_m": 337.00940647858397, "end_elevation_m": 337.10437199731473, "start_xy": [ 822150.9670000424, 6536718.518838512 ], "end_xy": [ 822160.9247523218, 6536717.654013446 ] }, "min_20m": { "gradient_pct": 1.4263113235011815, "start_distance_m": 644.0, "end_distance_m": 664.0, "midpoint_distance_m": 654.0, "start_elevation_m": 335.7485149469949, "end_elevation_m": 336.0337772116951, "start_xy": [ 822086.0248099312, 6536733.881947376 ], "end_xy": [ 822104.9636433221, 6536727.453838028 ] }, "min_25m": { "gradient_pct": 1.4652633430760034, "start_distance_m": 644.0, "end_distance_m": 669.0, "midpoint_distance_m": 656.5, "start_elevation_m": 335.7485149469949, "end_elevation_m": 336.1148307827639, "start_xy": [ 822086.0248099312, 6536733.881947376 ], "end_xy": [ 822109.7387076467, 6536725.983863746 ] }, "min_50m": { "gradient_pct": 1.7507617125482966, "start_distance_m": 641.0, "end_distance_m": 691.0, "midpoint_distance_m": 666.0, "start_elevation_m": 335.69707590473985, "end_elevation_m": 336.572456761014, "start_xy": [ 822083.1839849225, 6536734.846163779 ], "end_xy": [ 822131.080129266, 6536720.643072661 ] }, "min_100m": { "gradient_pct": 2.3446438990305865, "start_distance_m": 621.0, "end_distance_m": 721.0, "midpoint_distance_m": 671.0, "start_elevation_m": 334.75972809828414, "end_elevation_m": 337.10437199731473, "start_xy": [ 822064.2451515315, 6536741.274273126 ], "end_xy": [ 822160.9247523218, 6536717.654013446 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 25.004186958204855, "start_distance_m": 448.0, "end_distance_m": 450.0, "midpoint_distance_m": 449.0, "start_elevation_m": 310.61901928811596, "end_elevation_m": 311.11910302728006, "start_xy": [ 821892.9361219015, 6536763.622984473 ], "end_xy": [ 821894.9211835958, 6536763.378996624 ] }, "max_3m": { "gradient_pct": 23.094005878323287, "start_distance_m": 484.0, "end_distance_m": 487.0, "midpoint_distance_m": 485.5, "start_elevation_m": 318.20845161427997, "end_elevation_m": 318.90127179062966, "start_xy": [ 821928.6672323968, 6536759.231203197 ], "end_xy": [ 821931.644824938, 6536758.865221424 ] } }, "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": 0.046, "obstruction_max_height_m": 11.46, "flagged_windows_m": [] }, "review": [], "extent": [ "may_start_earlier" ] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "076a8e7f889cfb3c2cf6b3de65a6030c7155b1f0", "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-mc8", "road_pbf": "block-batch-fr-mc8.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_E821-N6536_0m5@21LHD5NK-2025-02-20.tif", "data/cache/fr/ign-lidarhd_dtm_E822-N6536_0m5@21LHD5NK-2025-02-20.tif" ], "calculated_at": "2026-09-22T15:54:51+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc8.osm.pbf", "osm_snapshot": "", "run_id": "fr-mc8", "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": [ "E821-N6536", "E822-N6536" ], "elevation_blocks": [ "21LHD5NK@2025-02-20" ], "ign_dalles": [ "LHD_FXX_0821_6537_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0822_6537_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD5NK" ], "ign_editions": [ "2025-02-20" ], "ign_dsm_edition": { "LHD_FXX_0821_6537_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0822_6537_MNT_O_0M50_LAMB93_IGN69": "2025-02-20" }, "route_summit_trim_m": 411.2, "route_summit_trim_loss_m": 15.8, "climb_origin": "discovered", "structure_own_ways": 4, "carriageway": { "stations": 35, "stations_resolved": 35, "width_median_m": 6.25, "width_p10_m": 3.95, "width_min_m": 2.75, "width_max_m": 12.0, "bounded_share": 0.514, "unbounded_share": 0.486, "confidence_median": 0.501, "width_median_bounded_m": 5.5, "window_m": [ 474.0, 499.0 ], "width_at_max25_m": 5.5, "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": 35, "stations_resolved": 35, "width_median_m": 7.25, "width_p10_m": 2.6, "width_min_m": 1.5, "width_max_m": 12.0, "bounded_share": 0.6, "unbounded_share": 0.4, "confidence_median": 1.0, "width_median_bounded_m": 6.25, "window_m": [ 474.0, 499.0 ], "width_at_max25_m": 6.5, "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": "Val d'Oingt", "county": "Rh\u00f4ne", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }