{ "ocl_version": "0.1.0", "name": "Chemin de Sainte-P\u00e9tronille", "slug": "chemin-de-sainte-petronille-2", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 29.903513774059576, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 578.0, "end_distance_m": 580.0, "start_elevation_m": 95.73938216894531, "end_elevation_m": 96.3374524444265, "min_gradient_pct": -1.892731719073737 }, { "window_m": 3.0, "max_gradient_pct": 27.7262614920474, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 578.0, "end_distance_m": 581.0, "start_elevation_m": 95.73938216894531, "end_elevation_m": 96.57117001370673, "min_gradient_pct": -0.16977604214455747 }, { "window_m": 5.0, "max_gradient_pct": 25.88531683235459, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 576.0, "end_distance_m": 581.0, "start_elevation_m": 95.276904172089, "end_elevation_m": 96.57117001370673, "min_gradient_pct": 1.280523490910923 }, { "window_m": 10.0, "max_gradient_pct": 24.914856609888858, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 571.0, "end_distance_m": 581.0, "start_elevation_m": 94.07968435271785, "end_elevation_m": 96.57117001370673, "min_gradient_pct": 1.642993730511293 }, { "window_m": 20.0, "max_gradient_pct": 23.228588807529817, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 562.0, "end_distance_m": 582.0, "start_elevation_m": 92.15722663446704, "end_elevation_m": 96.802944395973, "min_gradient_pct": 2.005927321031109 }, { "window_m": 25.0, "max_gradient_pct": 22.95653496350883, "diagnostic": false, "flags": [], "start_distance_m": 368.0, "end_distance_m": 393.0, "start_elevation_m": 64.86176543317026, "end_elevation_m": 70.60089917404747, "min_gradient_pct": 2.0109780026765804 }, { "window_m": 50.0, "max_gradient_pct": 20.838058901800196, "diagnostic": false, "flags": [], "start_distance_m": 364.0, "end_distance_m": 414.0, "start_elevation_m": 64.0828424293434, "end_elevation_m": 74.5018718802435, "min_gradient_pct": 2.7732590742729855 }, { "window_m": 100.0, "max_gradient_pct": 19.210398185356638, "diagnostic": false, "flags": [], "start_distance_m": 318.0, "end_distance_m": 418.0, "start_elevation_m": 55.95366198394662, "end_elevation_m": 75.16406016930326, "min_gradient_pct": 3.711796365515504 } ], "shape": { "ascent_concentration": 0.375, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 190.0, "shape_class": "sustained" }, "length_m": 685.6000000001112, "start_elevation_m": 36.37921079681327, "end_elevation_m": 112.70183392494425, "endpoint_gain_m": 76.32262312813099, "overall_gradient_pct": 11.132237912502713, "accumulated_ascent_m": 76.51679507407127, "window_maxima": { "max_5m": { "gradient_pct": 25.88531683235459, "start_distance_m": 576.0, "end_distance_m": 581.0, "midpoint_distance_m": 578.5, "start_elevation_m": 95.276904172089, "end_elevation_m": 96.57117001370673, "start_xy": [ 1036224.0204893001, 6299981.679338301 ], "end_xy": [ 1036219.4275462785, 6299983.629047289 ] }, "max_10m": { "gradient_pct": 24.914856609888858, "start_distance_m": 571.0, "end_distance_m": 581.0, "midpoint_distance_m": 576.0, "start_elevation_m": 94.07968435271785, "end_elevation_m": 96.57117001370673, "start_xy": [ 1036228.9784130964, 6299981.032042672 ], "end_xy": [ 1036219.4275462785, 6299983.629047289 ] }, "max_20m": { "gradient_pct": 23.228588807529817, "start_distance_m": 562.0, "end_distance_m": 582.0, "midpoint_distance_m": 572.0, "start_elevation_m": 92.15722663446704, "end_elevation_m": 96.802944395973, "start_xy": [ 1036237.8964846334, 6299979.8236104185 ], "end_xy": [ 1036218.5130876622, 6299984.033726716 ] }, "max_25m": { "gradient_pct": 22.95653496350883, "start_distance_m": 368.0, "end_distance_m": 393.0, "midpoint_distance_m": 380.5, "start_elevation_m": 64.86176543317026, "end_elevation_m": 70.60089917404747, "start_xy": [ 1036417.8894859535, 6299990.731882564 ], "end_xy": [ 1036406.4133444973, 6299973.320505194 ] }, "max_50m": { "gradient_pct": 20.838058901800196, "start_distance_m": 364.0, "end_distance_m": 414.0, "midpoint_distance_m": 389.0, "start_elevation_m": 64.0828424293434, "end_elevation_m": 74.5018718802435, "start_xy": [ 1036420.8248062987, 6299993.0111547625 ], "end_xy": [ 1036385.527553633, 6299975.507681448 ] }, "max_100m": { "gradient_pct": 19.210398185356638, "start_distance_m": 318.0, "end_distance_m": 418.0, "midpoint_distance_m": 368.0, "start_elevation_m": 55.95366198394662, "end_elevation_m": 75.16406016930326, "start_xy": [ 1036463.3875551737, 6299983.343902347 ], "end_xy": [ 1036381.549307754, 6299975.924286449 ] } }, "window_minima": { "min_5m": { "gradient_pct": 1.280523490910923, "start_distance_m": 211.0, "end_distance_m": 216.0, "midpoint_distance_m": 213.5, "start_elevation_m": 46.79448204859027, "end_elevation_m": 46.858508223135814, "start_xy": [ 1036536.1519347657, 6300024.511394628 ], "end_xy": [ 1036536.231984759, 6300019.5120354695 ] }, "min_10m": { "gradient_pct": 1.642993730511293, "start_distance_m": 206.0, "end_distance_m": 216.0, "midpoint_distance_m": 211.0, "start_elevation_m": 46.694208850084685, "end_elevation_m": 46.858508223135814, "start_xy": [ 1036536.0718847725, 6300029.510753787 ], "end_xy": [ 1036536.231984759, 6300019.5120354695 ] }, "min_20m": { "gradient_pct": 2.005927321031109, "start_distance_m": 208.0, "end_distance_m": 228.0, "midpoint_distance_m": 218.0, "start_elevation_m": 46.72328589054126, "end_elevation_m": 47.124471354747484, "start_xy": [ 1036536.1039047699, 6300027.511010123 ], "end_xy": [ 1036536.9241117623, 6300007.53699763 ] }, "min_25m": { "gradient_pct": 2.0109780026765804, "start_distance_m": 206.0, "end_distance_m": 231.0, "midpoint_distance_m": 218.5, "start_elevation_m": 46.694208850084685, "end_elevation_m": 47.19695335075383, "start_xy": [ 1036536.0718847725, 6300029.510753787 ], "end_xy": [ 1036537.1567263829, 6300004.546029486 ] }, "min_50m": { "gradient_pct": 2.7732590742729855, "start_distance_m": 198.0, "end_distance_m": 248.0, "midpoint_distance_m": 223.0, "start_elevation_m": 46.448268144251, "end_elevation_m": 47.834897681387496, "start_xy": [ 1036535.8788087144, 6300037.508152218 ], "end_xy": [ 1036532.9980558315, 6299990.354437475 ] }, "min_100m": { "gradient_pct": 3.711796365515504, "start_distance_m": 0.0, "end_distance_m": 100.0, "midpoint_distance_m": 50.0, "start_elevation_m": 36.37921079681327, "end_elevation_m": 40.09100716232877, "start_xy": [ 1036693.165, 6300047.596 ], "end_xy": [ 1036597.2726261889, 6300059.014435114 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 29.903513774059576, "start_distance_m": 578.0, "end_distance_m": 580.0, "midpoint_distance_m": 579.0, "start_elevation_m": 95.73938216894531, "end_elevation_m": 96.3374524444265, "start_xy": [ 1036222.1709221276, 6299982.415009007 ], "end_xy": [ 1036220.3420048949, 6299983.224367862 ] }, "max_3m": { "gradient_pct": 27.7262614920474, "start_distance_m": 578.0, "end_distance_m": 581.0, "midpoint_distance_m": 579.5, "start_elevation_m": 95.73938216894531, "end_elevation_m": 96.57117001370673, "start_xy": [ 1036222.1709221276, 6299982.415009007 ], "end_xy": [ 1036219.4275462785, 6299983.629047289 ] } }, "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": 0.13, "obstruction_max_height_m": 22.42, "flagged_windows_m": [ 2, 3, 5, 10, 20 ] }, "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_E1036-N6299_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E1036-N6300_0m5.tif" ], "calculated_at": "2026-09-17T03:01:29+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-alps4.osm.pbf", "osm_snapshot": "", "run_id": "fr-alps4", "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": [ "E1036-N6299", "E1036-N6300" ], "elevation_blocks": [ "21LHD8SP@2025-06-20" ], "ign_dalles": [ "LHD_FXX_1036_6300_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_1036_6301_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD8SP" ], "ign_editions": [ "2025-06-20" ], "ign_dsm_edition": { "LHD_FXX_1036_6300_MNT_O_0M50_LAMB93_IGN69": "2025-06-20", "LHD_FXX_1036_6301_MNT_O_0M50_LAMB93_IGN69": "2025-06-20" }, "route_cut_m": 685.6, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list; own decks unmasked", "carriageway": { "stations": 34, "stations_resolved": 34, "width_median_m": 5.38, "width_p10_m": 2.25, "width_min_m": 1.0, "width_max_m": 12.0, "bounded_share": 0.529, "unbounded_share": 0.471, "confidence_median": 0.524, "width_median_bounded_m": 3.88, "window_m": [ 368.0, 393.0 ], "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": 34, "stations_resolved": 34, "width_median_m": 4.25, "width_p10_m": 1.08, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.735, "unbounded_share": 0.265, "confidence_median": 1.0, "width_median_bounded_m": 2.75, "window_m": [ 368.0, 393.0 ], "width_at_max25_m": 2.75, "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": "La Gaude", "county": "Alpes-Maritimes", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }