{ "ocl_version": "0.1.0", "name": "Discovered lane (45.9920, 5.7957)", "slug": "discovered-lane-45-9920-5-7957", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 25.324734939144378, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 31.0, "end_distance_m": 33.0, "start_elevation_m": 347.10797603835897, "end_elevation_m": 347.61447073714186, "min_gradient_pct": -3.971531993568078 }, { "window_m": 3.0, "max_gradient_pct": 25.350158818948405, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 29.0, "end_distance_m": 32.0, "start_elevation_m": 346.6122892199444, "end_elevation_m": 347.37279398451284, "min_gradient_pct": -3.2313146504596566 }, { "window_m": 5.0, "max_gradient_pct": 24.15128971255058, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 28.0, "end_distance_m": 33.0, "start_elevation_m": 346.40690625151433, "end_elevation_m": 347.61447073714186, "min_gradient_pct": -2.663016640993874 }, { "window_m": 10.0, "max_gradient_pct": 23.238218462869327, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 29.0, "end_distance_m": 39.0, "start_elevation_m": 346.6122892199444, "end_elevation_m": 348.9361110662313, "min_gradient_pct": -1.9258335571220186 }, { "window_m": 20.0, "max_gradient_pct": 22.222595439029362, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 26.0, "end_distance_m": 46.0, "start_elevation_m": 345.9653309491747, "end_elevation_m": 350.4098500369806, "min_gradient_pct": -0.8967303150618022 }, { "window_m": 25.0, "max_gradient_pct": 20.911712254443955, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 26.0, "end_distance_m": 51.0, "start_elevation_m": 345.9653309491747, "end_elevation_m": 351.1932590127857, "min_gradient_pct": -0.7692630027920586 }, { "window_m": 50.0, "max_gradient_pct": 16.518995679688032, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 18.0, "end_distance_m": 68.0, "start_elevation_m": 344.953826568312, "end_elevation_m": 353.21332440815604, "min_gradient_pct": -0.3208475813348741 }, { "window_m": 100.0, "max_gradient_pct": 14.39857413192766, "diagnostic": false, "flags": [], "start_distance_m": 176.0, "end_distance_m": 276.0, "start_elevation_m": 360.3243861252014, "end_elevation_m": 374.72296025712905, "min_gradient_pct": 0.38167232445488253 } ], "shape": { "ascent_concentration": 0.373, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 170.0, "shape_class": "sustained" }, "length_m": 938.1866276363805, "start_elevation_m": 343.7971281230419, "end_elevation_m": 423.60123537355946, "endpoint_gain_m": 79.80410725051757, "overall_gradient_pct": 8.506208135962455, "accumulated_ascent_m": 80.48914979440468, "window_maxima": { "max_5m": { "gradient_pct": 24.15128971255058, "start_distance_m": 28.0, "end_distance_m": 33.0, "midpoint_distance_m": 30.5, "start_elevation_m": 346.40690625151433, "end_elevation_m": 347.61447073714186, "start_xy": [ 916695.8051368953, 6547468.3367699925 ], "end_xy": [ 916690.9632895298, 6547467.089166654 ] }, "max_10m": { "gradient_pct": 23.238218462869327, "start_distance_m": 29.0, "end_distance_m": 39.0, "midpoint_distance_m": 34.0, "start_elevation_m": 346.6122892199444, "end_elevation_m": 348.9361110662313, "start_xy": [ 916694.8367674222, 6547468.087249325 ], "end_xy": [ 916685.153072691, 6547465.592042649 ] }, "max_20m": { "gradient_pct": 22.222595439029362, "start_distance_m": 26.0, "end_distance_m": 46.0, "midpoint_distance_m": 36.0, "start_elevation_m": 345.9653309491747, "end_elevation_m": 350.4098500369806, "start_xy": [ 916697.7418758415, 6547468.835811327 ], "end_xy": [ 916678.5344974123, 6547463.347759232 ] }, "max_25m": { "gradient_pct": 20.911712254443955, "start_distance_m": 26.0, "end_distance_m": 51.0, "midpoint_distance_m": 38.5, "start_elevation_m": 345.9653309491747, "end_elevation_m": 351.1932590127857, "start_xy": [ 916697.7418758415, 6547468.835811327 ], "end_xy": [ 916673.8728865348, 6547461.539615425 ] }, "max_50m": { "gradient_pct": 16.518995679688032, "start_distance_m": 18.0, "end_distance_m": 68.0, "midpoint_distance_m": 43.0, "start_elevation_m": 344.953826568312, "end_elevation_m": 353.21332440815604, "start_xy": [ 916705.6786884973, 6547469.653400749 ], "end_xy": [ 916658.0234095514, 6547455.391926481 ] }, "max_100m": { "gradient_pct": 14.39857413192766, "start_distance_m": 176.0, "end_distance_m": 276.0, "midpoint_distance_m": 226.0, "start_elevation_m": 360.3243861252014, "end_elevation_m": 374.72296025712905, "start_xy": [ 916556.7781515198, 6547418.459463322 ], "end_xy": [ 916458.9937871838, 6547421.836683541 ] } }, "window_minima": { "min_5m": { "gradient_pct": -2.663016640993874, "start_distance_m": 763.0, "end_distance_m": 768.0, "midpoint_distance_m": 765.5, "start_elevation_m": 413.3028741360555, "end_elevation_m": 413.1697233040058, "start_xy": [ 916110.629506533, 6547424.188284946 ], "end_xy": [ 916107.128276115, 6547427.757792693 ] }, "min_10m": { "gradient_pct": -1.9258335571220186, "start_distance_m": 758.0, "end_distance_m": 768.0, "midpoint_distance_m": 763.0, "start_elevation_m": 413.362306659718, "end_elevation_m": 413.1697233040058, "start_xy": [ 916114.1307369511, 6547420.618777198 ], "end_xy": [ 916107.128276115, 6547427.757792693 ] }, "min_20m": { "gradient_pct": -0.8967303150618022, "start_distance_m": 748.0, "end_distance_m": 768.0, "midpoint_distance_m": 758.0, "start_elevation_m": 413.34906936701816, "end_elevation_m": 413.1697233040058, "start_xy": [ 916121.1331977872, 6547413.479761703 ], "end_xy": [ 916107.128276115, 6547427.757792693 ] }, "min_25m": { "gradient_pct": -0.7692630027920586, "start_distance_m": 749.0, "end_distance_m": 774.0, "midpoint_distance_m": 761.5, "start_elevation_m": 413.3635889865477, "end_elevation_m": 413.1712732358497, "start_xy": [ 916120.4329517036, 6547414.1936632525 ], "end_xy": [ 916102.8907103421, 6547431.998288821 ] }, "min_50m": { "gradient_pct": -0.3208475813348741, "start_distance_m": 732.0, "end_distance_m": 782.0, "midpoint_distance_m": 757.0, "start_elevation_m": 413.3939482334732, "end_elevation_m": 413.2335244428058, "start_xy": [ 916130.8238981229, 6547400.849790512 ], "end_xy": [ 916096.3035048987, 6547436.53797212 ] }, "min_100m": { "gradient_pct": 0.38167232445488253, "start_distance_m": 724.0, "end_distance_m": 824.0, "midpoint_distance_m": 774.0, "start_elevation_m": 413.29154422017115, "end_elevation_m": 413.67321654462603, "start_xy": [ 916134.7362319537, 6547393.935232915 ], "end_xy": [ 916066.2657686373, 6547465.135043028 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 25.324734939144378, "start_distance_m": 31.0, "end_distance_m": 33.0, "midpoint_distance_m": 32.0, "start_elevation_m": 347.10797603835897, "end_elevation_m": 347.61447073714186, "start_xy": [ 916692.9000284759, 6547467.588207989 ], "end_xy": [ 916690.9632895298, 6547467.089166654 ] }, "max_3m": { "gradient_pct": 25.350158818948405, "start_distance_m": 29.0, "end_distance_m": 32.0, "midpoint_distance_m": 30.5, "start_elevation_m": 346.6122892199444, "end_elevation_m": 347.37279398451284, "start_xy": [ 916694.8367674222, 6547468.087249325 ], "end_xy": [ 916691.9316590028, 6547467.338687322 ] } }, "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": 0.103, "obstruction_max_height_m": 16.64, "flagged_windows_m": [ 2, 3, 5, 10, 20, 25, 50 ] }, "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_E915-N6547_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E916-N6547_0m5.tif" ], "calculated_at": "2026-09-17T02:45:29+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": [ "E915-N6547", "E916-N6547" ], "elevation_blocks": [ "21LHD5PK1@2024-12-19" ], "ign_dalles": [ "LHD_FXX_0915_6548_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0916_6548_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD5PK1" ], "ign_editions": [ "2024-12-19" ], "ign_dsm_edition": { "LHD_FXX_0915_6548_MNT_O_0M50_LAMB93_IGN69": "2024-12-19", "LHD_FXX_0916_6548_MNT_O_0M50_LAMB93_IGN69": "2024-12-19" }, "climb_origin": "discovered", "structure_own_ways": 3, "carriageway": { "stations": 44, "stations_resolved": 44, "width_median_m": 4.75, "width_p10_m": 3.25, "width_min_m": 2.5, "width_max_m": 12.0, "bounded_share": 0.159, "unbounded_share": 0.841, "confidence_median": 0.0, "width_median_bounded_m": 4.5, "window_m": [ 26.0, 51.0 ], "width_at_max25_m": 4.5, "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": 44, "stations_resolved": 44, "width_median_m": 7.75, "width_p10_m": 1.32, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.523, "unbounded_share": 0.477, "confidence_median": 0.844, "width_median_bounded_m": 4.75, "window_m": [ 26.0, 51.0 ], "width_at_max25_m": 1.25, "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": "Corbonod", "county": "Ain", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }