{ "ocl_version": "0.1.0", "name": "Chemin des Evequaux", "slug": "chemin-des-evequaux", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 26.69473206623252, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 1774.0, "end_distance_m": 1776.0, "start_elevation_m": 540.668092456931, "end_elevation_m": 541.2019870982557, "min_gradient_pct": -0.17241747739831226 }, { "window_m": 3.0, "max_gradient_pct": 26.703613357346967, "diagnostic": true, "flags": [ "canopy_or_structure" ], "start_distance_m": 1774.0, "end_distance_m": 1777.0, "start_elevation_m": 540.668092456931, "end_elevation_m": 541.4692008576515, "min_gradient_pct": 1.2422019876832262 }, { "window_m": 5.0, "max_gradient_pct": 22.903051224359388, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 1772.0, "end_distance_m": 1777.0, "start_elevation_m": 540.3240482964335, "end_elevation_m": 541.4692008576515, "min_gradient_pct": 1.945198180137595 }, { "window_m": 10.0, "max_gradient_pct": 21.02793107550724, "diagnostic": false, "flags": [], "start_distance_m": 1672.0, "end_distance_m": 1682.0, "start_elevation_m": 522.2595250911029, "end_elevation_m": 524.3623181986536, "min_gradient_pct": 4.616835983824785 }, { "window_m": 20.0, "max_gradient_pct": 20.41670534233333, "diagnostic": false, "flags": [], "start_distance_m": 1667.0, "end_distance_m": 1687.0, "start_elevation_m": 521.24863446323, "end_elevation_m": 525.3319755316967, "min_gradient_pct": 7.003796918866101 }, { "window_m": 25.0, "max_gradient_pct": 19.968298418797986, "diagnostic": false, "flags": [], "start_distance_m": 1662.0, "end_distance_m": 1687.0, "start_elevation_m": 520.3399009269972, "end_elevation_m": 525.3319755316967, "min_gradient_pct": 7.669669181057316 }, { "window_m": 50.0, "max_gradient_pct": 18.81672311061152, "diagnostic": false, "flags": [], "start_distance_m": 1648.0, "end_distance_m": 1698.0, "start_elevation_m": 517.8430056495149, "end_elevation_m": 527.2513672048207, "min_gradient_pct": 8.061906052589507 }, { "window_m": 100.0, "max_gradient_pct": 18.34004152166733, "diagnostic": false, "flags": [], "start_distance_m": 1591.0, "end_distance_m": 1691.0, "start_elevation_m": 507.70632988797104, "end_elevation_m": 526.0463714096384, "min_gradient_pct": 8.567995054009486 } ], "shape": { "ascent_concentration": 0.344, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 461.0, "shape_class": "sustained" }, "length_m": 1823.117804837384, "start_elevation_m": 323.5445067780836, "end_elevation_m": 548.0848937548368, "endpoint_gain_m": 224.5403869767532, "overall_gradient_pct": 12.316285123263413, "accumulated_ascent_m": 224.54426909784593, "window_maxima": { "max_5m": { "gradient_pct": 22.903051224359388, "start_distance_m": 1772.0, "end_distance_m": 1777.0, "midpoint_distance_m": 1774.5, "start_elevation_m": 540.3240482964335, "end_elevation_m": 541.4692008576515, "start_xy": [ 919715.0134230945, 6464744.985312685 ], "end_xy": [ 919712.1974747761, 6464749.115640182 ] }, "max_10m": { "gradient_pct": 21.02793107550724, "start_distance_m": 1672.0, "end_distance_m": 1682.0, "midpoint_distance_m": 1677.0, "start_elevation_m": 522.2595250911029, "end_elevation_m": 524.3623181986536, "start_xy": [ 919802.2321640606, 6464700.002846164 ], "end_xy": [ 919792.7499156723, 6464703.1788445115 ] }, "max_20m": { "gradient_pct": 20.41670534233333, "start_distance_m": 1667.0, "end_distance_m": 1687.0, "midpoint_distance_m": 1677.0, "start_elevation_m": 521.24863446323, "end_elevation_m": 525.3319755316967, "start_xy": [ 919806.9732882548, 6464698.41484699 ], "end_xy": [ 919788.0087914782, 6464704.766843685 ] }, "max_25m": { "gradient_pct": 19.968298418797986, "start_distance_m": 1662.0, "end_distance_m": 1687.0, "midpoint_distance_m": 1674.5, "start_elevation_m": 520.3399009269972, "end_elevation_m": 525.3319755316967, "start_xy": [ 919811.6321020691, 6464696.602669688 ], "end_xy": [ 919788.0087914782, 6464704.766843685 ] }, "max_50m": { "gradient_pct": 18.81672311061152, "start_distance_m": 1648.0, "end_distance_m": 1698.0, "midpoint_distance_m": 1673.0, "start_elevation_m": 517.8430056495149, "end_elevation_m": 527.2513672048207, "start_xy": [ 919824.3067425371, 6464690.685846721 ], "end_xy": [ 919777.5783182511, 6464708.260441867 ] }, "max_100m": { "gradient_pct": 18.34004152166733, "start_distance_m": 1591.0, "end_distance_m": 1691.0, "midpoint_distance_m": 1641.0, "start_elevation_m": 507.70632988797104, "end_elevation_m": 526.0463714096384, "start_xy": [ 919870.0151362851, 6464656.960260022 ], "end_xy": [ 919784.215892123, 6464706.0372430235 ] } }, "window_minima": { "min_5m": { "gradient_pct": 1.945198180137595, "start_distance_m": 1358.0, "end_distance_m": 1363.0, "midpoint_distance_m": 1360.5, "start_elevation_m": 470.36772308679156, "end_elevation_m": 470.46498299579844, "start_xy": [ 920065.4047593431, 6464575.411339228 ], "end_xy": [ 920061.7508020841, 6464572.153638076 ] }, "min_10m": { "gradient_pct": 4.616835983824785, "start_distance_m": 1355.0, "end_distance_m": 1365.0, "midpoint_distance_m": 1360.0, "start_elevation_m": 470.22055349536515, "end_elevation_m": 470.68223709374763, "start_xy": [ 920067.5979770325, 6464577.458238387 ], "end_xy": [ 920060.313841278, 6464573.54473248 ] }, "min_20m": { "gradient_pct": 7.003796918866101, "start_distance_m": 1343.0, "end_distance_m": 1363.0, "midpoint_distance_m": 1353.0, "start_elevation_m": 469.0642236120252, "end_elevation_m": 470.46498299579844, "start_xy": [ 920076.3708477903, 6464585.645835022 ], "end_xy": [ 920061.7508020841, 6464572.153638076 ] }, "min_25m": { "gradient_pct": 7.669669181057316, "start_distance_m": 659.0, "end_distance_m": 684.0, "midpoint_distance_m": 671.5, "start_elevation_m": 392.4289557872721, "end_elevation_m": 394.34637308253645, "start_xy": [ 920459.8389716585, 6464194.893183042 ], "end_xy": [ 920436.2237274288, 6464193.444546255 ] }, "min_50m": { "gradient_pct": 8.061906052589507, "start_distance_m": 166.0, "end_distance_m": 216.0, "midpoint_distance_m": 191.0, "start_elevation_m": 339.41254808153866, "end_elevation_m": 343.4435011078334, "start_xy": [ 920837.0741697145, 6463913.0188575005 ], "end_xy": [ 920787.4718531357, 6463918.775087267 ] }, "min_100m": { "gradient_pct": 8.567995054009486, "start_distance_m": 158.0, "end_distance_m": 258.0, "midpoint_distance_m": 208.0, "start_elevation_m": 338.68765646217906, "end_elevation_m": 347.25565151618855, "start_xy": [ 920844.9829740537, 6463912.088935324 ], "end_xy": [ 920748.4468972774, 6463933.267806165 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 26.69473206623252, "start_distance_m": 1774.0, "end_distance_m": 1776.0, "midpoint_distance_m": 1775.0, "start_elevation_m": 540.668092456931, "end_elevation_m": 541.2019870982557, "start_xy": [ 919713.8836343801, 6464746.635639156 ], "end_xy": [ 919712.7538456656, 6464748.285965627 ] }, "max_3m": { "gradient_pct": 26.703613357346967, "start_distance_m": 1774.0, "end_distance_m": 1777.0, "midpoint_distance_m": 1775.5, "start_elevation_m": 540.668092456931, "end_elevation_m": 541.4692008576515, "start_xy": [ 919713.8836343801, 6464746.635639156 ], "end_xy": [ 919712.1974747761, 6464749.115640182 ] } }, "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": 0.067, "obstruction_max_height_m": 22.03, "flagged_windows_m": [ 2, 3, 5 ] }, "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_E919-N6464_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E920-N6463_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E920-N6464_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E921-N6463_0m5.tif", "data/cache/fr/ign-lidarhd_dtm_E921-N6464_0m5.tif" ], "calculated_at": "2026-09-17T04:45:59+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": [ "E919-N6464", "E920-N6463", "E920-N6464", "E921-N6463", "E921-N6464" ], "elevation_blocks": [ "21LHD6PM@2025-03-25" ], "ign_dalles": [ "LHD_FXX_0919_6465_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0920_6464_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0920_6465_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0921_6464_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0921_6465_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "21LHD6PM" ], "ign_editions": [ "2025-03-25" ], "ign_dsm_edition": { "LHD_FXX_0919_6465_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0920_6464_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0920_6465_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0921_6464_MNT_O_0M50_LAMB93_IGN69": "2025-03-25", "LHD_FXX_0921_6465_MNT_O_0M50_LAMB93_IGN69": "2025-03-25" }, "climb_origin": "discovered", "structure_own_ways": 7, "carriageway": { "stations": 79, "stations_resolved": 79, "width_median_m": 7.25, "width_p10_m": 4.0, "width_min_m": 2.5, "width_max_m": 12.0, "bounded_share": 0.127, "unbounded_share": 0.873, "confidence_median": 0.0, "width_median_bounded_m": 4.62, "window_m": [ 1662.0, 1687.0 ], "width_at_max25_m": 6.0, "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": 79, "stations_resolved": 79, "width_median_m": 5.75, "width_p10_m": 2.25, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.684, "unbounded_share": 0.316, "confidence_median": 1.0, "width_median_bounded_m": 4.38, "window_m": [ 1662.0, 1687.0 ], "width_at_max25_m": 4.0, "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": "Biviers", "county": "Is\u00e8re", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }