{ "ocl_version": "0.1.0", "name": "Chemin de Calamane", "slug": "chemin-de-calamane", "confidence": "B", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 28.259297165601538, "diagnostic": true, "flags": [ "structure_excluded" ], "start_distance_m": 329.0, "end_distance_m": 331.0, "start_elevation_m": 454.0755291198682, "end_elevation_m": 454.6407150631802, "min_gradient_pct": -21.044689960251617, "suppressed_max_gradient_pct": 39.057635966781845, "suppressed_location_m": [ 263.0, 265.0 ] }, { "window_m": 3.0, "max_gradient_pct": 27.410401391417356, "diagnostic": true, "flags": [ "structure_excluded" ], "start_distance_m": 328.0, "end_distance_m": 331.0, "start_elevation_m": 453.8184030214377, "end_elevation_m": 454.6407150631802, "min_gradient_pct": -12.959873983584203, "suppressed_max_gradient_pct": 30.019985155210332, "suppressed_location_m": [ 262.0, 265.0 ] }, { "window_m": 5.0, "max_gradient_pct": 26.618896265501917, "diagnostic": false, "flags": [], "start_distance_m": 326.0, "end_distance_m": 331.0, "start_elevation_m": 453.3097702499051, "end_elevation_m": 454.6407150631802, "min_gradient_pct": -5.429073069027481 }, { "window_m": 10.0, "max_gradient_pct": 25.505458253220468, "diagnostic": false, "flags": [], "start_distance_m": 321.0, "end_distance_m": 331.0, "start_elevation_m": 452.09016923785816, "end_elevation_m": 454.6407150631802, "min_gradient_pct": -1.2894997419374477 }, { "window_m": 20.0, "max_gradient_pct": 24.07634731155099, "diagnostic": false, "flags": [], "start_distance_m": 311.0, "end_distance_m": 331.0, "start_elevation_m": 449.82544560087, "end_elevation_m": 454.6407150631802, "min_gradient_pct": 2.5895443825928055 }, { "window_m": 25.0, "max_gradient_pct": 23.537525477519694, "diagnostic": false, "flags": [], "start_distance_m": 316.0, "end_distance_m": 341.0, "start_elevation_m": 450.9027662209294, "end_elevation_m": 456.7871475903093, "min_gradient_pct": 2.6143931272354166 }, { "window_m": 50.0, "max_gradient_pct": 23.034276429077522, "diagnostic": false, "flags": [], "start_distance_m": 314.0, "end_distance_m": 364.0, "start_elevation_m": 450.4561373616944, "end_elevation_m": 461.97327557623316, "min_gradient_pct": 3.10091465130688 }, { "window_m": 100.0, "max_gradient_pct": 20.524714590719842, "diagnostic": false, "flags": [ "canopy_or_structure" ], "start_distance_m": 305.0, "end_distance_m": 405.0, "start_elevation_m": 448.77455978994635, "end_elevation_m": 469.2992743806662, "min_gradient_pct": 4.647901251396149 } ], "shape": { "ascent_concentration": 0.426, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 155.0, "shape_class": "sustained" }, "length_m": 519.3679753980869, "start_elevation_m": 421.20734907495336, "end_elevation_m": 477.69129702025776, "endpoint_gain_m": 56.48394794530441, "overall_gradient_pct": 10.87551613131526, "accumulated_ascent_m": 57.79365310845981, "window_maxima": { "max_5m": { "gradient_pct": 26.618896265501917, "start_distance_m": 326.0, "end_distance_m": 331.0, "midpoint_distance_m": 328.5, "start_elevation_m": 453.3097702499051, "end_elevation_m": 454.6407150631802, "start_xy": [ 548385.3537501929, 6210161.168849856 ], "end_xy": [ 548385.4281104543, 6210156.169402831 ] }, "max_10m": { "gradient_pct": 25.505458253220468, "start_distance_m": 321.0, "end_distance_m": 331.0, "midpoint_distance_m": 326.0, "start_elevation_m": 452.09016923785816, "end_elevation_m": 454.6407150631802, "start_xy": [ 548385.2793899316, 6210166.168296881 ], "end_xy": [ 548385.4281104543, 6210156.169402831 ] }, "max_20m": { "gradient_pct": 24.07634731155099, "start_distance_m": 311.0, "end_distance_m": 331.0, "midpoint_distance_m": 321.0, "start_elevation_m": 449.82544560087, "end_elevation_m": 454.6407150631802, "start_xy": [ 548385.1306694088, 6210176.16719093 ], "end_xy": [ 548385.4281104543, 6210156.169402831 ] }, "max_25m": { "gradient_pct": 23.537525477519694, "start_distance_m": 316.0, "end_distance_m": 341.0, "midpoint_distance_m": 328.5, "start_elevation_m": 450.9027662209294, "end_elevation_m": 456.7871475903093, "start_xy": [ 548385.2050296703, 6210171.167743905 ], "end_xy": [ 548384.3790798025, 6210146.285910067 ] }, "max_50m": { "gradient_pct": 23.034276429077522, "start_distance_m": 314.0, "end_distance_m": 364.0, "midpoint_distance_m": 339.0, "start_elevation_m": 450.4561373616944, "end_elevation_m": 461.97327557623316, "start_xy": [ 548385.1752855657, 6210173.167522715 ], "end_xy": [ 548379.6354037913, 6210123.836378816 ] }, "max_100m": { "gradient_pct": 20.524714590719842, "start_distance_m": 305.0, "end_distance_m": 405.0, "midpoint_distance_m": 355.0, "start_elevation_m": 448.77455978994635, "end_elevation_m": 469.2992743806662, "start_xy": [ 548384.8563077436, 6210182.156155802 ], "end_xy": [ 548382.1145787043, 6210082.951500268 ] } }, "window_minima": { "min_5m": { "gradient_pct": -5.429073069027481, "start_distance_m": 137.0, "end_distance_m": 142.0, "midpoint_distance_m": 139.5, "start_elevation_m": 429.9914687160239, "end_elevation_m": 429.72001506257254, "start_xy": [ 548436.6603043118, 6210333.886542229 ], "end_xy": [ 548433.812379115, 6210329.77688019 ] }, "min_10m": { "gradient_pct": -1.2894997419374477, "start_distance_m": 137.0, "end_distance_m": 147.0, "midpoint_distance_m": 142.0, "start_elevation_m": 429.9914687160239, "end_elevation_m": 429.8625187418302, "start_xy": [ 548436.6603043118, 6210333.886542229 ], "end_xy": [ 548430.9644539184, 6210325.667218151 ] }, "min_20m": { "gradient_pct": 2.5895443825928055, "start_distance_m": 21.0, "end_distance_m": 41.0, "midpoint_distance_m": 31.0, "start_elevation_m": 421.84211839878947, "end_elevation_m": 422.360027275308, "start_xy": [ 548474.9766156652, 6210426.051336459 ], "end_xy": [ 548489.5260789205, 6210414.003151915 ] }, "min_25m": { "gradient_pct": 2.6143931272354166, "start_distance_m": 17.0, "end_distance_m": 42.0, "midpoint_distance_m": 29.5, "start_elevation_m": 421.7476223279855, "end_elevation_m": 422.40122060979434, "start_xy": [ 548472.3014497054, 6210429.004532683 ], "end_xy": [ 548488.9854765594, 6210413.161873669 ] }, "min_50m": { "gradient_pct": 3.10091465130688, "start_distance_m": 469.0, "end_distance_m": 519.0, "midpoint_distance_m": 494.0, "start_elevation_m": 476.128236168903, "end_elevation_m": 477.67869349455646, "start_xy": [ 548385.6931257157, 6210019.280189255 ], "end_xy": [ 548422.9627751061, 6209986.626713721 ] }, "min_100m": { "gradient_pct": 4.647901251396149, "start_distance_m": 0.0, "end_distance_m": 100.0, "midpoint_distance_m": 50.0, "start_elevation_m": 421.20734907495336, "end_elevation_m": 425.8552503263495, "start_xy": [ 548464.962, 6210444.071 ], "end_xy": [ 548457.6305396173, 6210364.367735401 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 28.259297165601538, "start_distance_m": 329.0, "end_distance_m": 331.0, "midpoint_distance_m": 330.0, "start_elevation_m": 454.0755291198682, "end_elevation_m": 454.6407150631802, "start_xy": [ 548385.3983663497, 6210158.169181641 ], "end_xy": [ 548385.4281104543, 6210156.169402831 ] }, "max_3m": { "gradient_pct": 27.410401391417356, "start_distance_m": 328.0, "end_distance_m": 331.0, "midpoint_distance_m": 329.5, "start_elevation_m": 453.8184030214377, "end_elevation_m": 454.6407150631802, "start_xy": [ 548385.3834942975, 6210159.169071047 ], "end_xy": [ 548385.4281104543, 6210156.169402831 ] } }, "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": { "structure_suppression": { "masked_fraction": 0.012, "windows_resited": [ 2.0, 3.0 ], "windows_unresolved": [], "minima_resited": [], "minima_unresolved": [] }, "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.209, "obstruction_max_height_m": 22.13, "flagged_windows_m": [ 100 ] }, "excluded_ranges_m": [ [ 262.0, 267.0 ] ], "review": [], "extent": [] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "937d2a005af5491e462567d7f33ab563f033918b", "code_git_dirty": "false", "analysis_version": "0.1.0", "analysis_config_digest": "sha256:0048c2bbb24ab95e", "python": "3.14.4", "numpy": "2.5.3", "rasterio": "1.5.1", "pyproj": "3.8.0", "laspy": "2.7.0", "shapely": "2.1.2", "pyosmium": "4.3.1", "libosmium": "2.23.1", "gdal": "3.12.4", "proj": "9.8.1", "run_id": "fr-pyr3", "road_pbf": "block-batch-fr-pyr3.osm.pbf", "region_key": "france", "crs": "EPSG:2154", "elevation_provider_key": "ign-lidarhd", "tile_index": "wms-grid", "authority": "bdtopo", "registry_pbf": "france-vosges-2026-09-16.osm.pbf", "tile_index_snapshot": "sha256:79dd257545ed11dc" }, "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_E548-N6209_0m5@22LHD1IR-2025-03-20.tif", "data/cache/fr/ign-lidarhd_dtm_E548-N6210_0m5@22LHD1IR-2025-03-20.tif" ], "calculated_at": "2026-09-20T08:54:36+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-pyr3.osm.pbf", "osm_snapshot": "", "run_id": "fr-pyr3", "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": [ "E548-N6209", "E548-N6210" ], "elevation_blocks": [ "22LHD1IR@2025-03-20" ], "ign_dalles": [ "LHD_FXX_0548_6210_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0548_6211_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD1IR" ], "ign_editions": [ "2025-03-20" ], "ign_dsm_edition": { "LHD_FXX_0548_6210_MNT_O_0M50_LAMB93_IGN69": "2025-03-20", "LHD_FXX_0548_6211_MNT_O_0M50_LAMB93_IGN69": "2025-03-20" }, "climb_origin": "discovered", "structure_own_ways": 3, "carriageway": { "stations": 27, "stations_resolved": 27, "width_median_m": 3.25, "width_p10_m": 2.15, "width_min_m": 1.25, "width_max_m": 12.0, "bounded_share": 0.519, "unbounded_share": 0.481, "confidence_median": 0.5, "width_median_bounded_m": 3.12, "window_m": [ 316.0, 341.0 ], "width_at_max25_m": 2.5, "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": 27, "stations_resolved": 27, "width_median_m": 3.0, "width_p10_m": 1.15, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.889, "unbounded_share": 0.111, "confidence_median": 1.0, "width_median_bounded_m": 2.75, "window_m": [ 316.0, 341.0 ], "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": "Saint-Girons", "county": "Ari\u00e8ge", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }