{ "ocl_version": "0.1.0", "name": "Chemin de Saint-Christol", "slug": "chemin-de-saint-christol", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 24.865505131703003, "diagnostic": true, "flags": [], "start_distance_m": 667.0, "end_distance_m": 669.0, "start_elevation_m": 397.8475681445183, "end_elevation_m": 398.34487824715234, "min_gradient_pct": -13.405983306358848 }, { "window_m": 3.0, "max_gradient_pct": 22.906347404568805, "diagnostic": true, "flags": [], "start_distance_m": 303.0, "end_distance_m": 306.0, "start_elevation_m": 405.3422359777869, "end_elevation_m": 406.029426399924, "min_gradient_pct": -13.169303976502533 }, { "window_m": 5.0, "max_gradient_pct": 22.41795966444215, "diagnostic": false, "flags": [], "start_distance_m": 302.0, "end_distance_m": 307.0, "start_elevation_m": 405.12450350746553, "end_elevation_m": 406.24540149068764, "min_gradient_pct": -12.8571571264888 }, { "window_m": 10.0, "max_gradient_pct": 21.678454466554058, "diagnostic": false, "flags": [], "start_distance_m": 298.0, "end_distance_m": 308.0, "start_elevation_m": 404.2840112108815, "end_elevation_m": 406.4518566575369, "min_gradient_pct": -12.066934101861762 }, { "window_m": 20.0, "max_gradient_pct": 20.831992048660766, "diagnostic": false, "flags": [], "start_distance_m": 289.0, "end_distance_m": 309.0, "start_elevation_m": 402.48426664775576, "end_elevation_m": 406.6506650574879, "min_gradient_pct": -11.32798582975937 }, { "window_m": 25.0, "max_gradient_pct": 20.33088667239531, "diagnostic": false, "flags": [], "start_distance_m": 286.0, "end_distance_m": 311.0, "start_elevation_m": 401.927750480029, "end_elevation_m": 407.0104721481278, "min_gradient_pct": -10.926220158511114 }, { "window_m": 50.0, "max_gradient_pct": 18.314093056827915, "diagnostic": false, "flags": [], "start_distance_m": 810.0, "end_distance_m": 860.0, "start_elevation_m": 419.3337128152187, "end_elevation_m": 428.49075934363265, "min_gradient_pct": -10.041215745480713 }, { "window_m": 100.0, "max_gradient_pct": 17.1718228175248, "diagnostic": false, "flags": [], "start_distance_m": 1255.0, "end_distance_m": 1355.0, "start_elevation_m": 463.7948096206268, "end_elevation_m": 480.9666324381516, "min_gradient_pct": -9.135776562550063 } ], "shape": { "ascent_concentration": 0.394, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 335.0, "shape_class": "sustained" }, "length_m": 1381.2124850136024, "start_elevation_m": 372.48250509521745, "end_elevation_m": 484.4369985913648, "endpoint_gain_m": 111.95449349614734, "overall_gradient_pct": 8.105522843941335, "accumulated_ascent_m": 130.8465586951968, "window_maxima": { "max_5m": { "gradient_pct": 22.41795966444215, "start_distance_m": 302.0, "end_distance_m": 307.0, "midpoint_distance_m": 304.5, "start_elevation_m": 405.12450350746553, "end_elevation_m": 406.24540149068764, "start_xy": [ 882006.2595010297, 6351458.671546842 ], "end_xy": [ 882007.153010669, 6351453.752030552 ] }, "max_10m": { "gradient_pct": 21.678454466554058, "start_distance_m": 298.0, "end_distance_m": 308.0, "midpoint_distance_m": 303.0, "start_elevation_m": 404.2840112108815, "end_elevation_m": 406.4518566575369, "start_xy": [ 882005.5446933182, 6351462.607159874 ], "end_xy": [ 882007.3317125969, 6351452.768127295 ] }, "max_20m": { "gradient_pct": 20.831992048660766, "start_distance_m": 289.0, "end_distance_m": 309.0, "midpoint_distance_m": 299.0, "start_elevation_m": 402.48426664775576, "end_elevation_m": 406.6506650574879, "start_xy": [ 882003.270705322, 6351471.309938494 ], "end_xy": [ 882007.5104145248, 6351451.784224037 ] }, "max_25m": { "gradient_pct": 20.33088667239531, "start_distance_m": 286.0, "end_distance_m": 311.0, "midpoint_distance_m": 298.5, "start_elevation_m": 401.927750480029, "end_elevation_m": 407.0104721481278, "start_xy": [ 882002.46958876, 6351474.200995784 ], "end_xy": [ 882007.8678183806, 6351449.816417521 ] }, "max_50m": { "gradient_pct": 18.314093056827915, "start_distance_m": 810.0, "end_distance_m": 860.0, "midpoint_distance_m": 835.0, "start_elevation_m": 419.3337128152187, "end_elevation_m": 428.49075934363265, "start_xy": [ 881675.0060978871, 6351241.6910677785 ], "end_xy": [ 881627.3581572677, 6351255.895696755 ] }, "max_100m": { "gradient_pct": 17.1718228175248, "start_distance_m": 1255.0, "end_distance_m": 1355.0, "midpoint_distance_m": 1305.0, "start_elevation_m": 463.7948096206268, "end_elevation_m": 480.9666324381516, "start_xy": [ 881288.6587587548, 6351389.776129541 ], "end_xy": [ 881270.7863166111, 6351300.050319993 ] } }, "window_minima": { "min_5m": { "gradient_pct": -12.8571571264888, "start_distance_m": 458.0, "end_distance_m": 463.0, "midpoint_distance_m": 460.5, "start_elevation_m": 401.8108262162112, "end_elevation_m": 401.16796835988674, "start_xy": [ 881966.2054116561, 6351315.902421245 ], "end_xy": [ 881963.0295718807, 6351312.04055101 ] }, "min_10m": { "gradient_pct": -12.066934101861762, "start_distance_m": 359.0, "end_distance_m": 369.0, "midpoint_distance_m": 364.0, "start_elevation_m": 409.9554609115941, "end_elevation_m": 408.74876750140794, "start_xy": [ 881987.368788539, 6351411.478508729 ], "end_xy": [ 881984.5029655517, 6351402.087738451 ] }, "min_20m": { "gradient_pct": -11.32798582975937, "start_distance_m": 354.0, "end_distance_m": 374.0, "midpoint_distance_m": 364.0, "start_elevation_m": 410.4921294388797, "end_elevation_m": 408.22653227292784, "start_xy": [ 881991.4115670702, 6351414.150566266 ], "end_xy": [ 881984.0932496464, 6351397.105893789 ] }, "min_25m": { "gradient_pct": -10.926220158511114, "start_distance_m": 354.0, "end_distance_m": 379.0, "midpoint_distance_m": 366.5, "start_elevation_m": 410.4921294388797, "end_elevation_m": 407.76057439925194, "start_xy": [ 881991.4115670702, 6351414.150566266 ], "end_xy": [ 881983.7037233659, 6351392.121089953 ] }, "min_50m": { "gradient_pct": -10.041215745480713, "start_distance_m": 438.0, "end_distance_m": 488.0, "midpoint_distance_m": 463.0, "start_elevation_m": 403.8173224856538, "end_elevation_m": 398.79671461291343, "start_xy": [ 881973.1831282144, 6351334.430319148 ], "end_xy": [ 881941.9275550175, 6351299.390931832 ] }, "min_100m": { "gradient_pct": -9.135776562550063, "start_distance_m": 431.0, "end_distance_m": 531.0, "midpoint_distance_m": 481.0, "start_elevation_m": 404.37205452580736, "end_elevation_m": 395.2362779632573, "start_xy": [ 881975.2447254711, 6351341.119849531 ], "end_xy": [ 881903.506912867, 6351310.7255925285 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 24.865505131703003, "start_distance_m": 667.0, "end_distance_m": 669.0, "midpoint_distance_m": 668.0, "start_elevation_m": 397.8475681445183, "end_elevation_m": 398.34487824715234, "start_xy": [ 881783.025640276, 6351315.932833731 ], "end_xy": [ 881781.8252147704, 6351314.333152949 ] }, "max_3m": { "gradient_pct": 22.906347404568805, "start_distance_m": 303.0, "end_distance_m": 306.0, "midpoint_distance_m": 304.5, "start_elevation_m": 405.3422359777869, "end_elevation_m": 406.029426399924, "start_xy": [ 882006.4382029576, 6351457.687643585 ], "end_xy": [ 882006.9743087412, 6351454.7359338105 ] } }, "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": 0.067, "obstruction_max_height_m": 15.52, "flagged_windows_m": [] }, "review": [], "extent": [ "may_start_earlier", "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_E881-N6351_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E882-N6351_0m5.tif" ], "calculated_at": "2026-09-17T03:57:52+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps1.osm.pbf", "osm_snapshot": "", "run_id": "fr-alps1", "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": [ "E881-N6351", "E882-N6351" ], "elevation_blocks": [ "22LHD6OO@2025-03-14" ], "ign_dalles": [ "LHD_FXX_0881_6352_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0882_6352_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD6OO" ], "ign_editions": [ "2025-03-14" ], "ign_dsm_edition": { "LHD_FXX_0881_6352_MNT_O_0M50_LAMB93_IGN69": "2025-03-14", "LHD_FXX_0882_6352_MNT_O_0M50_LAMB93_IGN69": "2025-03-14" }, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 62, "stations_resolved": 62, "width_median_m": 4.88, "width_p10_m": 3.5, "width_min_m": 2.5, "width_max_m": 11.25, "bounded_share": 0.452, "unbounded_share": 0.548, "confidence_median": 0.0, "width_median_bounded_m": 4.62, "window_m": [ 286.0, 311.0 ], "width_at_max25_m": 5.0, "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": 62, "stations_resolved": 62, "width_median_m": 6.88, "width_p10_m": 1.85, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.806, "unbounded_share": 0.194, "confidence_median": 1.0, "width_median_bounded_m": 5.75, "window_m": [ 286.0, 311.0 ], "width_at_max25_m": 7.5, "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": "Eygaliers", "county": "Dr\u00f4me", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }