{ "ocl_version": "0.1.0", "name": "Route du Chef-Lieu", "slug": "route-du-chef-lieu-2", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 23.286296304405596, "diagnostic": true, "flags": [], "start_distance_m": 1328.0, "end_distance_m": 1330.0, "start_elevation_m": 668.3451371253732, "end_elevation_m": 668.8108630514613, "min_gradient_pct": -6.389736960267101 }, { "window_m": 3.0, "max_gradient_pct": 21.751054156887523, "diagnostic": true, "flags": [], "start_distance_m": 1331.0, "end_distance_m": 1334.0, "start_elevation_m": 668.9036553453116, "end_elevation_m": 669.5561869700182, "min_gradient_pct": -3.316599835007613 }, { "window_m": 5.0, "max_gradient_pct": 21.496327811787523, "diagnostic": false, "flags": [], "start_distance_m": 1325.0, "end_distance_m": 1330.0, "start_elevation_m": 667.7360466608719, "end_elevation_m": 668.8108630514613, "min_gradient_pct": -1.9556436522202603 }, { "window_m": 10.0, "max_gradient_pct": 20.348083458785595, "diagnostic": false, "flags": [], "start_distance_m": 1320.0, "end_distance_m": 1330.0, "start_elevation_m": 666.7760547055827, "end_elevation_m": 668.8108630514613, "min_gradient_pct": -0.2734112293285307 }, { "window_m": 20.0, "max_gradient_pct": 19.765752998204107, "diagnostic": false, "flags": [], "start_distance_m": 1314.0, "end_distance_m": 1334.0, "start_elevation_m": 665.6030363703774, "end_elevation_m": 669.5561869700182, "min_gradient_pct": 0.861436870640091 }, { "window_m": 25.0, "max_gradient_pct": 19.433803343864838, "diagnostic": false, "flags": [], "start_distance_m": 1305.0, "end_distance_m": 1330.0, "start_elevation_m": 663.9524122154951, "end_elevation_m": 668.8108630514613, "min_gradient_pct": 1.5336270949619575 }, { "window_m": 50.0, "max_gradient_pct": 18.598337522992324, "diagnostic": false, "flags": [], "start_distance_m": 1284.0, "end_distance_m": 1334.0, "start_elevation_m": 660.257018208522, "end_elevation_m": 669.5561869700182, "min_gradient_pct": 3.9496453740009656 }, { "window_m": 100.0, "max_gradient_pct": 17.14737748342793, "diagnostic": false, "flags": [], "start_distance_m": 1292.0, "end_distance_m": 1392.0, "start_elevation_m": 661.6270274048028, "end_elevation_m": 678.7744048882307, "min_gradient_pct": 4.03673660153629 } ], "shape": { "ascent_concentration": 0.36, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 603.0, "shape_class": "sustained" }, "length_m": 1789.0961357551519, "start_elevation_m": 537.7849116723715, "end_elevation_m": 726.2820331289046, "endpoint_gain_m": 188.49712145653302, "overall_gradient_pct": 10.535885561955624, "accumulated_ascent_m": 188.89515032865813, "window_maxima": { "max_5m": { "gradient_pct": 21.496327811787523, "start_distance_m": 1325.0, "end_distance_m": 1330.0, "midpoint_distance_m": 1327.5, "start_elevation_m": 667.7360466608719, "end_elevation_m": 668.8108630514613, "start_xy": [ 917206.1098379462, 6493361.551366787 ], "end_xy": [ 917210.9018827074, 6493360.124374493 ] }, "max_10m": { "gradient_pct": 20.348083458785595, "start_distance_m": 1320.0, "end_distance_m": 1330.0, "midpoint_distance_m": 1325.0, "start_elevation_m": 666.7760547055827, "end_elevation_m": 668.8108630514613, "start_xy": [ 917201.317793185, 6493362.978359081 ], "end_xy": [ 917210.9018827074, 6493360.124374493 ] }, "max_20m": { "gradient_pct": 19.765752998204107, "start_distance_m": 1314.0, "end_distance_m": 1334.0, "midpoint_distance_m": 1324.0, "start_elevation_m": 665.6030363703774, "end_elevation_m": 669.5561869700182, "start_xy": [ 917195.5673394715, 6493364.690749833 ], "end_xy": [ 917214.7063844157, 6493358.90804979 ] }, "max_25m": { "gradient_pct": 19.433803343864838, "start_distance_m": 1305.0, "end_distance_m": 1330.0, "midpoint_distance_m": 1317.5, "start_elevation_m": 663.9524122154951, "end_elevation_m": 668.8108630514613, "start_xy": [ 917186.9416589014, 6493367.259335962 ], "end_xy": [ 917210.9018827074, 6493360.124374493 ] }, "max_50m": { "gradient_pct": 18.598337522992324, "start_distance_m": 1284.0, "end_distance_m": 1334.0, "midpoint_distance_m": 1309.0, "start_elevation_m": 660.257018208522, "end_elevation_m": 669.5561869700182, "start_xy": [ 917166.8150709044, 6493373.252703597 ], "end_xy": [ 917214.7063844157, 6493358.90804979 ] }, "max_100m": { "gradient_pct": 17.14737748342793, "start_distance_m": 1292.0, "end_distance_m": 1392.0, "midpoint_distance_m": 1342.0, "start_elevation_m": 661.6270274048028, "end_elevation_m": 678.7744048882307, "start_xy": [ 917174.4823425224, 6493370.969515926 ], "end_xy": [ 917266.7525050034, 6493333.332902586 ] } }, "window_minima": { "min_5m": { "gradient_pct": -1.9556436522202603, "start_distance_m": 1577.0, "end_distance_m": 1582.0, "midpoint_distance_m": 1579.5, "start_elevation_m": 705.4392400424572, "end_elevation_m": 705.3414578598462, "start_xy": [ 917419.4344284796, 6493289.0914854305 ], "end_xy": [ 917423.5359042865, 6493291.951187549 ] }, "min_10m": { "gradient_pct": -0.2734112293285307, "start_distance_m": 774.0, "end_distance_m": 784.0, "midpoint_distance_m": 779.0, "start_elevation_m": 602.4145972756171, "end_elevation_m": 602.3872561526842, "start_xy": [ 916789.7074335641, 6493588.545964695 ], "end_xy": [ 916786.1541347938, 6493579.215883336 ] }, "min_20m": { "gradient_pct": 0.861436870640091, "start_distance_m": 773.0, "end_distance_m": 793.0, "midpoint_distance_m": 783.0, "start_elevation_m": 602.3892100820715, "end_elevation_m": 602.5614974561995, "start_xy": [ 916789.4963236402, 6493589.226721139 ], "end_xy": [ 916784.6801892959, 6493570.337398969 ] }, "min_25m": { "gradient_pct": 1.5336270949619575, "start_distance_m": 773.0, "end_distance_m": 798.0, "midpoint_distance_m": 785.5, "start_elevation_m": 602.3892100820715, "end_elevation_m": 602.772616855812, "start_xy": [ 916789.4963236402, 6493589.226721139 ], "end_xy": [ 916786.0327572252, 6493565.77145621 ] }, "min_50m": { "gradient_pct": 3.9496453740009656, "start_distance_m": 64.0, "end_distance_m": 114.0, "midpoint_distance_m": 89.0, "start_elevation_m": 540.5019693744854, "end_elevation_m": 542.4767920614859, "start_xy": [ 916295.0588558936, 6493963.652338935 ], "end_xy": [ 916285.9961624474, 6493914.480521931 ] }, "min_100m": { "gradient_pct": 4.03673660153629, "start_distance_m": 25.0, "end_distance_m": 125.0, "midpoint_distance_m": 75.0, "start_elevation_m": 538.8955059472803, "end_elevation_m": 542.9322425488166, "start_xy": [ 916302.1277567815, 6494002.006356199 ], "end_xy": [ 916284.0023698892, 6493903.66272219 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 23.286296304405596, "start_distance_m": 1328.0, "end_distance_m": 1330.0, "midpoint_distance_m": 1329.0, "start_elevation_m": 668.3451371253732, "end_elevation_m": 668.8108630514613, "start_xy": [ 917208.9850648029, 6493360.695171411 ], "end_xy": [ 917210.9018827074, 6493360.124374493 ] }, "max_3m": { "gradient_pct": 21.751054156887523, "start_distance_m": 1331.0, "end_distance_m": 1334.0, "midpoint_distance_m": 1332.5, "start_elevation_m": 668.9036553453116, "end_elevation_m": 669.5561869700182, "start_xy": [ 917211.8602916596, 6493359.838976034 ], "end_xy": [ 917214.7063844157, 6493358.90804979 ] } }, "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": 0.044, "obstruction_max_height_m": 24.14, "flagged_windows_m": [] }, "review": [], "extent": [ "may_continue_beyond_end" ] }, "provenance": { "analysis_version": "0.1.0", "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_E916-N6493_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E916-N6494_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E917-N6493_0m5.tif" ], "calculated_at": "2026-09-17T03:42:25+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps2.osm.pbf", "osm_snapshot": "", "run_id": "fr-alps2", "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": [ "E916-N6493", "E916-N6494", "E917-N6493" ], "elevation_blocks": [ "21LHD6PL@2025-03-07" ], "ign_dalles": [ "LHD_FXX_0916_6494_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0916_6495_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0917_6494_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD6PL" ], "ign_editions": [ "2025-03-07" ], "ign_dsm_edition": { "LHD_FXX_0916_6494_MNT_O_0M50_LAMB93_IGN69": "2025-03-07", "LHD_FXX_0916_6495_MNT_O_0M50_LAMB93_IGN69": "2025-03-07", "LHD_FXX_0917_6494_MNT_O_0M50_LAMB93_IGN69": "2025-03-07" }, "climb_origin": "discovered", "structure_own_ways": 6, "carriageway": { "stations": 77, "stations_resolved": 77, "width_median_m": 6.0, "width_p10_m": 2.75, "width_min_m": 1.0, "width_max_m": 12.0, "bounded_share": 0.156, "unbounded_share": 0.844, "confidence_median": 0.0, "width_median_bounded_m": 4.0, "window_m": [ 1305.0, 1330.0 ], "width_at_max25_m": 4.5, "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": 77, "stations_resolved": 77, "width_median_m": 9.5, "width_p10_m": 3.8, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.351, "unbounded_share": 0.649, "confidence_median": 0.0, "width_median_bounded_m": 5.75, "window_m": [ 1305.0, 1330.0 ], "width_at_max25_m": 8.12, "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": "Attignat-Oncin", "county": "Savoie", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }