{ "ocl_version": "0.1.0", "name": "Chemin des Rez", "slug": "chemin-des-rez", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 26.341792308440404, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 831.0, "end_distance_m": 833.0, "start_elevation_m": 233.468626419947, "end_elevation_m": 233.9954622661158, "min_gradient_pct": -13.236394059973122 }, { "window_m": 3.0, "max_gradient_pct": 25.926796794840357, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 831.0, "end_distance_m": 834.0, "start_elevation_m": 233.468626419947, "end_elevation_m": 234.2464303237922, "min_gradient_pct": -11.055738439289561 }, { "window_m": 5.0, "max_gradient_pct": 25.030636202137657, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 842.0, "end_distance_m": 847.0, "start_elevation_m": 236.04126645372844, "end_elevation_m": 237.29279826383532, "min_gradient_pct": -10.206612434859608 }, { "window_m": 10.0, "max_gradient_pct": 24.075514796516302, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 838.0, "end_distance_m": 848.0, "start_elevation_m": 235.10214514624712, "end_elevation_m": 237.50969662589875, "min_gradient_pct": -7.427288822299261 }, { "window_m": 20.0, "max_gradient_pct": 23.015341521732893, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 831.0, "end_distance_m": 851.0, "start_elevation_m": 233.468626419947, "end_elevation_m": 238.07169472429356, "min_gradient_pct": -2.8396402130431397 }, { "window_m": 25.0, "max_gradient_pct": 20.93161664500144, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 827.0, "end_distance_m": 852.0, "start_elevation_m": 233.00637458380402, "end_elevation_m": 238.23927874505438, "min_gradient_pct": -2.5137681817479915 }, { "window_m": 50.0, "max_gradient_pct": 16.06775070510878, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 802.0, "end_distance_m": 852.0, "start_elevation_m": 230.2054033925, "end_elevation_m": 238.23927874505438, "min_gradient_pct": -1.3563722276155659 }, { "window_m": 100.0, "max_gradient_pct": 12.326777786058472, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 755.0, "end_distance_m": 855.0, "start_elevation_m": 226.1900248548166, "end_elevation_m": 238.51680264087508, "min_gradient_pct": 0.28646281485583813 } ], "shape": { "ascent_concentration": 0.369, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 76.0, "shape_class": "sustained" }, "length_m": 923.6203638013521, "start_elevation_m": 198.9330965807971, "end_elevation_m": 241.46817649558832, "endpoint_gain_m": 42.535079914791226, "overall_gradient_pct": 4.605255750287839, "accumulated_ascent_m": 45.298638796013165, "window_maxima": { "max_5m": { "gradient_pct": 25.030636202137657, "start_distance_m": 842.0, "end_distance_m": 847.0, "midpoint_distance_m": 844.5, "start_elevation_m": 236.04126645372844, "end_elevation_m": 237.29279826383532, "start_xy": [ 894069.319470062, 6457679.594497972 ], "end_xy": [ 894067.7316139105, 6457674.853325876 ] }, "max_10m": { "gradient_pct": 24.075514796516302, "start_distance_m": 838.0, "end_distance_m": 848.0, "midpoint_distance_m": 843.0, "start_elevation_m": 235.10214514624712, "end_elevation_m": 237.50969662589875, "start_xy": [ 894070.5897549833, 6457683.387435649 ], "end_xy": [ 894067.4140426802, 6457673.905091457 ] }, "max_20m": { "gradient_pct": 23.015341521732893, "start_distance_m": 831.0, "end_distance_m": 851.0, "midpoint_distance_m": 841.0, "start_elevation_m": 233.468626419947, "end_elevation_m": 238.07169472429356, "start_xy": [ 894072.8127535955, 6457690.025076583 ], "end_xy": [ 894066.4613289892, 6457671.060388199 ] }, "max_25m": { "gradient_pct": 20.93161664500144, "start_distance_m": 827.0, "end_distance_m": 852.0, "midpoint_distance_m": 839.5, "start_elevation_m": 233.00637458380402, "end_elevation_m": 238.23927874505438, "start_xy": [ 894074.0830385168, 6457693.818014259 ], "end_xy": [ 894066.1437577589, 6457670.112153781 ] }, "max_50m": { "gradient_pct": 16.06775070510878, "start_distance_m": 802.0, "end_distance_m": 852.0, "midpoint_distance_m": 827.0, "start_elevation_m": 230.2054033925, "end_elevation_m": 238.23927874505438, "start_xy": [ 894083.539314497, 6457716.941656068 ], "end_xy": [ 894066.1437577589, 6457670.112153781 ] }, "max_100m": { "gradient_pct": 12.326777786058472, "start_distance_m": 755.0, "end_distance_m": 855.0, "midpoint_distance_m": 805.0, "start_elevation_m": 226.1900248548166, "end_elevation_m": 238.51680264087508, "start_xy": [ 894102.2732726745, 6457760.046560193 ], "end_xy": [ 894065.191044068, 6457667.267450523 ] } }, "window_minima": { "min_5m": { "gradient_pct": -10.206612434859608, "start_distance_m": 889.0, "end_distance_m": 894.0, "midpoint_distance_m": 891.5, "start_elevation_m": 239.61819170418676, "end_elevation_m": 239.10786108244378, "start_xy": [ 894039.3461807837, 6457649.392003522 ], "end_xy": [ 894034.6838154258, 6457647.585806061 ] }, "min_10m": { "gradient_pct": -7.427288822299261, "start_distance_m": 886.0, "end_distance_m": 896.0, "midpoint_distance_m": 891.0, "start_elevation_m": 239.77095873929457, "end_elevation_m": 239.02822985706464, "start_xy": [ 894042.1435999984, 6457650.475721999 ], "end_xy": [ 894032.8188692827, 6457646.863327076 ] }, "min_20m": { "gradient_pct": -2.8396402130431397, "start_distance_m": 690.0, "end_distance_m": 710.0, "midpoint_distance_m": 700.0, "start_elevation_m": 226.28899177629944, "end_elevation_m": 225.7210637336908, "start_xy": [ 894110.0090458603, 6457820.909747806 ], "end_xy": [ 894115.8047701629, 6457802.220875613 ] }, "min_25m": { "gradient_pct": -2.5137681817479915, "start_distance_m": 690.0, "end_distance_m": 715.0, "midpoint_distance_m": 702.5, "start_elevation_m": 226.28899177629944, "end_elevation_m": 225.66054973086244, "start_xy": [ 894110.0090458603, 6457820.909747806 ], "end_xy": [ 894116.4968632155, 6457797.269006552 ] }, "min_50m": { "gradient_pct": -1.3563722276155659, "start_distance_m": 686.0, "end_distance_m": 736.0, "midpoint_distance_m": 711.0, "start_elevation_m": 226.25121657115824, "end_elevation_m": 225.57303045735046, "start_xy": [ 894107.8538386439, 6457824.2794780405 ], "end_xy": [ 894110.0536898109, 6457777.380489614 ] }, "min_100m": { "gradient_pct": 0.28646281485583813, "start_distance_m": 433.0, "end_distance_m": 533.0, "midpoint_distance_m": 483.0, "start_elevation_m": 215.20206442669695, "end_elevation_m": 215.4885272415528, "start_xy": [ 894085.9275046044, 6458016.971919817 ], "end_xy": [ 894141.1758283925, 6457969.201410296 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 26.341792308440404, "start_distance_m": 831.0, "end_distance_m": 833.0, "midpoint_distance_m": 832.0, "start_elevation_m": 233.468626419947, "end_elevation_m": 233.9954622661158, "start_xy": [ 894072.8127535955, 6457690.025076583 ], "end_xy": [ 894072.177611135, 6457688.128607744 ] }, "max_3m": { "gradient_pct": 25.926796794840357, "start_distance_m": 831.0, "end_distance_m": 834.0, "midpoint_distance_m": 832.5, "start_elevation_m": 233.468626419947, "end_elevation_m": 234.2464303237922, "start_xy": [ 894072.8127535955, 6457690.025076583 ], "end_xy": [ 894071.8600399046, 6457687.180373325 ] } }, "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": 0.15, "obstruction_max_height_m": 20.43, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50, 100 ] }, "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_E893-N6457_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E893-N6458_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E894-N6457_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E894-N6458_0m5.tif" ], "calculated_at": "2026-09-17T03:30:30+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-N6457", "E893-N6458", "E894-N6457", "E894-N6458" ], "elevation_blocks": [ "21LHD6PM@2025-03-25" ], "ign_dalles": [ "LHD_FXX_0893_6458_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0893_6459_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0894_6458_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0894_6459_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD6PM" ], "ign_editions": [ "2025-03-25" ], "ign_dsm_edition": { "LHD_FXX_0893_6458_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0893_6459_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0894_6458_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0894_6459_MNT_O_0M50_LAMB93_IGN69": "2025-03-25" }, "climb_origin": "discovered", "structure_own_ways": 2, "carriageway": { "stations": 43, "stations_resolved": 43, "width_median_m": 5.75, "width_p10_m": 3.55, "width_min_m": 2.5, "width_max_m": 12.0, "bounded_share": 0.233, "unbounded_share": 0.767, "confidence_median": 0.0, "width_median_bounded_m": 4.12, "window_m": [ 827.0, 852.0 ], "width_at_max25_m": 4.0, "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": 43, "stations_resolved": 43, "width_median_m": 6.5, "width_p10_m": 1.25, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.651, "unbounded_share": 0.349, "confidence_median": 1.0, "width_median_bounded_m": 3.25, "window_m": [ 827.0, 852.0 ], "width_at_max25_m": 2.0, "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": "Rovon", "county": "Is\u00e8re", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }