{ "ocl_version": "0.1.0", "name": "Chemin du Bottaz", "slug": "chemin-du-bottaz", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 26.869369681492117, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 234.0, "end_distance_m": 236.0, "start_elevation_m": 579.4798210738985, "end_elevation_m": 580.0172084675283, "min_gradient_pct": -2.2177565320760095 }, { "window_m": 3.0, "max_gradient_pct": 24.76583557010296, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 233.0, "end_distance_m": 236.0, "start_elevation_m": 579.2742334004253, "end_elevation_m": 580.0172084675283, "min_gradient_pct": -1.836782265115744 }, { "window_m": 5.0, "max_gradient_pct": 22.75011991168185, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 231.0, "end_distance_m": 236.0, "start_elevation_m": 578.8797024719443, "end_elevation_m": 580.0172084675283, "min_gradient_pct": -1.6542641437308703 }, { "window_m": 10.0, "max_gradient_pct": 22.09456452984682, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 234.0, "end_distance_m": 244.0, "start_elevation_m": 579.4798210738985, "end_elevation_m": 581.6892775268832, "min_gradient_pct": -1.3999906008996277 }, { "window_m": 20.0, "max_gradient_pct": 21.9658950035614, "diagnostic": false, "flags": [], "start_distance_m": 241.0, "end_distance_m": 261.0, "start_elevation_m": 581.0057032066693, "end_elevation_m": 585.3988822073816, "min_gradient_pct": -0.4150356114780607 }, { "window_m": 25.0, "max_gradient_pct": 21.938639873227658, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 235.0, "end_distance_m": 260.0, "start_elevation_m": 579.6998881292875, "end_elevation_m": 585.1845480975944, "min_gradient_pct": -0.20600441578562823 }, { "window_m": 50.0, "max_gradient_pct": 21.776819595545703, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 235.0, "end_distance_m": 285.0, "start_elevation_m": 579.6998881292875, "end_elevation_m": 590.5882979270604, "min_gradient_pct": 0.10024388564283981 }, { "window_m": 100.0, "max_gradient_pct": 20.305386926963024, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 194.0, "end_distance_m": 294.0, "start_elevation_m": 572.1213073605163, "end_elevation_m": 592.4266942874793, "min_gradient_pct": 0.5913755967321777 } ], "shape": { "ascent_concentration": 0.49, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 198.0, "shape_class": "stepped" }, "length_m": 593.000000000208, "start_elevation_m": 562.45013900147, "end_elevation_m": 619.7167096188434, "endpoint_gain_m": 57.26657061737342, "overall_gradient_pct": 9.657094539182685, "accumulated_ascent_m": 57.74690302350223, "window_maxima": { "max_5m": { "gradient_pct": 22.75011991168185, "start_distance_m": 231.0, "end_distance_m": 236.0, "midpoint_distance_m": 233.5, "start_elevation_m": 578.8797024719443, "end_elevation_m": 580.0172084675283, "start_xy": [ 883505.6710777726, 6487907.242299592 ], "end_xy": [ 883500.9328335734, 6487905.645727668 ] }, "max_10m": { "gradient_pct": 22.09456452984682, "start_distance_m": 234.0, "end_distance_m": 244.0, "midpoint_distance_m": 239.0, "start_elevation_m": 579.4798210738985, "end_elevation_m": 581.6892775268832, "start_xy": [ 883502.8281312531, 6487906.284356438 ], "end_xy": [ 883493.3516428546, 6487903.091212589 ] }, "max_20m": { "gradient_pct": 21.9658950035614, "start_distance_m": 241.0, "end_distance_m": 261.0, "midpoint_distance_m": 251.0, "start_elevation_m": 581.0057032066693, "end_elevation_m": 585.3988822073816, "start_xy": [ 883496.1945893741, 6487904.049155744 ], "end_xy": [ 883477.1465386177, 6487897.983341871 ] }, "max_25m": { "gradient_pct": 21.938639873227658, "start_distance_m": 235.0, "end_distance_m": 260.0, "midpoint_distance_m": 247.5, "start_elevation_m": 579.6998881292875, "end_elevation_m": 585.1845480975944, "start_xy": [ 883501.8804824132, 6487905.965042053 ], "end_xy": [ 883478.1150075779, 6487898.232476118 ] }, "max_50m": { "gradient_pct": 21.776819595545703, "start_distance_m": 235.0, "end_distance_m": 285.0, "midpoint_distance_m": 260.0, "start_elevation_m": 579.6998881292875, "end_elevation_m": 590.5882979270604, "start_xy": [ 883501.8804824132, 6487905.965042053 ], "end_xy": [ 883453.9032835703, 6487892.0041199485 ] }, "max_100m": { "gradient_pct": 20.305386926963024, "start_distance_m": 194.0, "end_distance_m": 294.0, "midpoint_distance_m": 244.0, "start_elevation_m": 572.1213073605163, "end_elevation_m": 592.4266942874793, "start_xy": [ 883539.9730843622, 6487920.90465498 ], "end_xy": [ 883445.1870629275, 6487889.7619117275 ] } }, "window_minima": { "min_5m": { "gradient_pct": -1.6542641437308703, "start_distance_m": 571.0, "end_distance_m": 576.0, "midpoint_distance_m": 573.5, "start_elevation_m": 619.3276731932539, "end_elevation_m": 619.2449599860673, "start_xy": [ 883423.122884599, 6488089.292847284 ], "end_xy": [ 883424.0069076616, 6488094.214077133 ] }, "min_10m": { "gradient_pct": -1.3999906008996277, "start_distance_m": 567.0, "end_distance_m": 577.0, "midpoint_distance_m": 572.0, "start_elevation_m": 619.3744520018568, "end_elevation_m": 619.2344529417668, "start_xy": [ 883422.4156661491, 6488085.355863405 ], "end_xy": [ 883424.183712274, 6488095.198323103 ] }, "min_20m": { "gradient_pct": -0.4150356114780607, "start_distance_m": 61.0, "end_distance_m": 81.0, "midpoint_distance_m": 71.0, "start_elevation_m": 563.0386834691373, "end_elevation_m": 562.9556763468416, "start_xy": [ 883647.5021632693, 6487926.1352987625 ], "end_xy": [ 883629.0604372802, 6487933.8749849675 ] }, "min_25m": { "gradient_pct": -0.20600441578562823, "start_distance_m": 61.0, "end_distance_m": 86.0, "midpoint_distance_m": 73.5, "start_elevation_m": 563.0386834691373, "end_elevation_m": 562.9871823651908, "start_xy": [ 883647.5021632693, 6487926.1352987625 ], "end_xy": [ 883624.6692386013, 6487936.260136126 ] }, "min_50m": { "gradient_pct": 0.10024388564283981, "start_distance_m": 45.0, "end_distance_m": 95.0, "midpoint_distance_m": 70.0, "start_elevation_m": 562.9215443184853, "end_elevation_m": 562.9716662613067, "start_xy": [ 883662.7450851763, 6487921.424423227 ], "end_xy": [ 883616.8098163483, 6487940.645279435 ] }, "min_100m": { "gradient_pct": 0.5913755967321777, "start_distance_m": 1.0, "end_distance_m": 101.0, "midpoint_distance_m": 51.0, "start_elevation_m": 562.4366661235862, "end_elevation_m": 563.0280417203184, "start_xy": [ 883705.9657472214, 6487914.423650801 ], "end_xy": [ 883611.5702015129, 6487943.568708309 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 26.869369681492117, "start_distance_m": 234.0, "end_distance_m": 236.0, "midpoint_distance_m": 235.0, "start_elevation_m": 579.4798210738985, "end_elevation_m": 580.0172084675283, "start_xy": [ 883502.8281312531, 6487906.284356438 ], "end_xy": [ 883500.9328335734, 6487905.645727668 ] }, "max_3m": { "gradient_pct": 24.76583557010296, "start_distance_m": 233.0, "end_distance_m": 236.0, "midpoint_distance_m": 234.5, "start_elevation_m": 579.2742334004253, "end_elevation_m": 580.0172084675283, "start_xy": [ 883503.7757800929, 6487906.603670822 ], "end_xy": [ 883500.9328335734, 6487905.645727668 ] } }, "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": 0.199, "obstruction_max_height_m": 15.61, "flagged_windows_m": [ 2, 3, 5, 10, 25, 50, 100 ] }, "review": [], "extent": [] }, "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_E883-N6487_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E883-N6488_0m5.tif" ], "calculated_at": "2026-09-17T05:04:56+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": [ "E883-N6487", "E883-N6488" ], "elevation_blocks": [ "21LHD6OL@2025-02-20" ], "ign_dalles": [ "LHD_FXX_0883_6488_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0883_6489_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD6OL" ], "ign_editions": [ "2025-02-20" ], "ign_dsm_edition": { "LHD_FXX_0883_6488_MNT_O_0M50_LAMB93_IGN69": "2025-02-20", "LHD_FXX_0883_6489_MNT_O_0M50_LAMB93_IGN69": "2025-02-20" }, "route_summit_trim_m": 443.3, "route_summit_trim_loss_m": 9.1, "climb_origin": "discovered", "structure_own_ways": 2, "carriageway": { "stations": 29, "stations_resolved": 29, "width_median_m": 5.25, "width_p10_m": 3.2, "width_min_m": 2.0, "width_max_m": 12.0, "bounded_share": 0.31, "unbounded_share": 0.69, "confidence_median": 0.0, "width_median_bounded_m": 4.5, "window_m": [ 235.0, 260.0 ], "width_at_max25_m": 4.12, "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": 29, "stations_resolved": 29, "width_median_m": 7.25, "width_p10_m": 1.95, "width_min_m": 1.25, "width_max_m": 12.0, "bounded_share": 0.552, "unbounded_share": 0.448, "confidence_median": 1.0, "width_median_bounded_m": 4.0, "window_m": [ 235.0, 260.0 ], "width_at_max25_m": 4.0, "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": "Saint-Didier-de-Bizonnes", "county": "Is\u00e8re", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }