{ "ocl_version": "0.1.0", "name": "Chemin de la Croze", "slug": "chemin-de-la-croze", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 39.966570237243104, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 414.0, "end_distance_m": 416.0, "start_elevation_m": 388.24910090477806, "end_elevation_m": 389.0484323095229, "min_gradient_pct": -13.047642454478137 }, { "window_m": 3.0, "max_gradient_pct": 36.12317819416072, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 413.0, "end_distance_m": 416.0, "start_elevation_m": 387.9647369636981, "end_elevation_m": 389.0484323095229, "min_gradient_pct": -8.48700908093368 }, { "window_m": 5.0, "max_gradient_pct": 34.335889290561, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 411.0, "end_distance_m": 416.0, "start_elevation_m": 387.3316378449949, "end_elevation_m": 389.0484323095229, "min_gradient_pct": -1.95159127344823 }, { "window_m": 10.0, "max_gradient_pct": 28.9808294922625, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 406.0, "end_distance_m": 416.0, "start_elevation_m": 386.1503493602967, "end_elevation_m": 389.0484323095229, "min_gradient_pct": 2.8765167612590403 }, { "window_m": 20.0, "max_gradient_pct": 26.886924508623338, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 396.0, "end_distance_m": 416.0, "start_elevation_m": 383.67104740779826, "end_elevation_m": 389.0484323095229, "min_gradient_pct": 3.871293325658769 }, { "window_m": 25.0, "max_gradient_pct": 26.01720756695613, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 391.0, "end_distance_m": 416.0, "start_elevation_m": 382.5441304177839, "end_elevation_m": 389.0484323095229, "min_gradient_pct": 4.073409583009607 }, { "window_m": 50.0, "max_gradient_pct": 24.130040052774575, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 393.0, "end_distance_m": 443.0, "start_elevation_m": 382.9603067259254, "end_elevation_m": 395.0253267523127, "min_gradient_pct": 4.428140886781534 }, { "window_m": 100.0, "max_gradient_pct": 22.569674263114848, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 338.0, "end_distance_m": 438.0, "start_elevation_m": 371.4299537892501, "end_elevation_m": 393.9996280523649, "min_gradient_pct": 5.529747005729064 } ], "shape": { "ascent_concentration": 0.417, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 313.0, "shape_class": "sustained" }, "length_m": 891.8888640185068, "start_elevation_m": 330.6974028476601, "end_elevation_m": 438.41050270263156, "endpoint_gain_m": 107.71309985497146, "overall_gradient_pct": 12.07696431701791, "accumulated_ascent_m": 108.05675705138862, "window_maxima": { "max_5m": { "gradient_pct": 34.335889290561, "start_distance_m": 411.0, "end_distance_m": 416.0, "midpoint_distance_m": 413.5, "start_elevation_m": 387.3316378449949, "end_elevation_m": 389.0484323095229, "start_xy": [ 894226.3327347762, 6474167.307585683 ], "end_xy": [ 894221.3338904714, 6474167.2000886295 ] }, "max_10m": { "gradient_pct": 28.9808294922625, "start_distance_m": 406.0, "end_distance_m": 416.0, "midpoint_distance_m": 411.0, "start_elevation_m": 386.1503493602967, "end_elevation_m": 389.0484323095229, "start_xy": [ 894231.331579081, 6474167.415082735 ], "end_xy": [ 894221.3338904714, 6474167.2000886295 ] }, "max_20m": { "gradient_pct": 26.886924508623338, "start_distance_m": 396.0, "end_distance_m": 416.0, "midpoint_distance_m": 406.0, "start_elevation_m": 383.67104740779826, "end_elevation_m": 389.0484323095229, "start_xy": [ 894241.3292676905, 6474167.630076841 ], "end_xy": [ 894221.3338904714, 6474167.2000886295 ] }, "max_25m": { "gradient_pct": 26.01720756695613, "start_distance_m": 391.0, "end_distance_m": 416.0, "midpoint_distance_m": 403.5, "start_elevation_m": 382.5441304177839, "end_elevation_m": 389.0484323095229, "start_xy": [ 894246.3281119954, 6474167.737573894 ], "end_xy": [ 894221.3338904714, 6474167.2000886295 ] }, "max_50m": { "gradient_pct": 24.130040052774575, "start_distance_m": 393.0, "end_distance_m": 443.0, "midpoint_distance_m": 418.0, "start_elevation_m": 382.9603067259254, "end_elevation_m": 395.0253267523127, "start_xy": [ 894244.3285742735, 6474167.694575073 ], "end_xy": [ 894195.9641344036, 6474158.929289283 ] }, "max_100m": { "gradient_pct": 22.569674263114848, "start_distance_m": 338.0, "end_distance_m": 438.0, "midpoint_distance_m": 388.0, "start_elevation_m": 371.4299537892501, "end_elevation_m": 393.9996280523649, "start_xy": [ 894293.8997923367, 6474145.412235241 ], "end_xy": [ 894200.5796293509, 6474160.852101388 ] } }, "window_minima": { "min_5m": { "gradient_pct": -1.95159127344823, "start_distance_m": 508.0, "end_distance_m": 513.0, "midpoint_distance_m": 510.5, "start_elevation_m": 407.39130218828615, "end_elevation_m": 407.29372262461374, "start_xy": [ 894133.2245440339, 6474142.750556503 ], "end_xy": [ 894128.5278122964, 6474141.035706368 ] }, "min_10m": { "gradient_pct": 2.8765167612590403, "start_distance_m": 0.0, "end_distance_m": 10.0, "midpoint_distance_m": 5.0, "start_elevation_m": 330.6974028476601, "end_elevation_m": 330.985054523786, "start_xy": [ 894609.506, 6474036.944 ], "end_xy": [ 894599.7749663403, 6474039.247689196 ] }, "min_20m": { "gradient_pct": 3.871293325658769, "start_distance_m": 786.0, "end_distance_m": 806.0, "midpoint_distance_m": 796.0, "start_elevation_m": 432.2546224326863, "end_elevation_m": 433.02888109781804, "start_xy": [ 893870.8422753952, 6474053.814139497 ], "end_xy": [ 893853.0232492466, 6474044.732162448 ] }, "min_25m": { "gradient_pct": 4.073409583009607, "start_distance_m": 785.0, "end_distance_m": 810.0, "midpoint_distance_m": 797.5, "start_elevation_m": 432.2099702208625, "end_elevation_m": 433.2283226166149, "start_xy": [ 893871.7332267027, 6474054.268238349 ], "end_xy": [ 893849.459444017, 6474042.915767037 ] }, "min_50m": { "gradient_pct": 4.428140886781534, "start_distance_m": 783.0, "end_distance_m": 833.0, "midpoint_distance_m": 808.0, "start_elevation_m": 432.1070121030165, "end_elevation_m": 434.32108254640724, "start_xy": [ 893873.5151293174, 6474055.176436054 ], "end_xy": [ 893828.767046022, 6474032.877322405 ] }, "min_100m": { "gradient_pct": 5.529747005729064, "start_distance_m": 750.0, "end_distance_m": 850.0, "midpoint_distance_m": 800.0, "start_elevation_m": 429.78506793622785, "end_elevation_m": 435.3148149419569, "start_xy": [ 893903.8401810327, 6474068.111031386 ], "end_xy": [ 893813.433393256, 6474025.537084476 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 39.966570237243104, "start_distance_m": 414.0, "end_distance_m": 416.0, "midpoint_distance_m": 415.0, "start_elevation_m": 388.24910090477806, "end_elevation_m": 389.0484323095229, "start_xy": [ 894223.3334281933, 6474167.243087451 ], "end_xy": [ 894221.3338904714, 6474167.2000886295 ] }, "max_3m": { "gradient_pct": 36.12317819416072, "start_distance_m": 413.0, "end_distance_m": 416.0, "midpoint_distance_m": 414.5, "start_elevation_m": 387.9647369636981, "end_elevation_m": 389.0484323095229, "start_xy": [ 894224.3331970543, 6474167.264586861 ], "end_xy": [ 894221.3338904714, 6474167.2000886295 ] } }, "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": 0.357, "obstruction_max_height_m": 31.11, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50, 100 ] }, "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_E893-N6473_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E893-N6474_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E894-N6473_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E894-N6474_0m5.tif" ], "calculated_at": "2026-09-17T03:30:50+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": [ "E893-N6473", "E893-N6474", "E894-N6473", "E894-N6474" ], "elevation_blocks": [ "21LHD6PM@2025-03-25" ], "ign_dalles": [ "LHD_FXX_0893_6474_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0893_6475_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0894_6474_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0894_6475_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD6PM" ], "ign_editions": [ "2025-03-25" ], "ign_dsm_edition": { "LHD_FXX_0893_6474_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0893_6475_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0894_6474_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0894_6475_MNT_O_0M50_LAMB93_IGN69": "2025-03-25" }, "climb_origin": "discovered", "structure_own_ways": 5, "carriageway": { "stations": 42, "stations_resolved": 42, "width_median_m": 5.38, "width_p10_m": 3.05, "width_min_m": 1.25, "width_max_m": 12.0, "bounded_share": 0.31, "unbounded_share": 0.69, "confidence_median": 0.0, "width_median_bounded_m": 4.25, "window_m": [ 391.0, 416.0 ], "width_at_max25_m": 3.5, "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": 42, "stations_resolved": 42, "width_median_m": 3.5, "width_p10_m": 1.0, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.786, "unbounded_share": 0.214, "confidence_median": 1.0, "width_median_bounded_m": 2.5, "window_m": [ 391.0, 416.0 ], "width_at_max25_m": 3.0, "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": "Renage", "county": "Is\u00e8re", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }