{ "ocl_version": "0.1.0", "name": "Col des Brosses from La Valla-sur-Rochefort", "slug": "col-des-brosses-from-la-valla-sur-rochefort", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 7.696340628143616, "diagnostic": true, "flags": [], "start_distance_m": 1415.0, "end_distance_m": 1417.0, "start_elevation_m": 887.0487414787009, "end_elevation_m": 887.2026682912638, "min_gradient_pct": -2.267771614077674 }, { "window_m": 3.0, "max_gradient_pct": 7.447589990063837, "diagnostic": true, "flags": [], "start_distance_m": 1415.0, "end_distance_m": 1418.0, "start_elevation_m": 887.0487414787009, "end_elevation_m": 887.2721691784028, "min_gradient_pct": -1.817429481138788 }, { "window_m": 5.0, "max_gradient_pct": 7.077674322263192, "diagnostic": false, "flags": [], "start_distance_m": 2182.0, "end_distance_m": 2187.0, "start_elevation_m": 922.8845113520414, "end_elevation_m": 923.2383950681545, "min_gradient_pct": -1.9287713152129982 }, { "window_m": 10.0, "max_gradient_pct": 6.769981432435088, "diagnostic": false, "flags": [], "start_distance_m": 2177.0, "end_distance_m": 2187.0, "start_elevation_m": 922.561396924911, "end_elevation_m": 923.2383950681545, "min_gradient_pct": -1.6959665540400692 }, { "window_m": 20.0, "max_gradient_pct": 6.415322248101347, "diagnostic": false, "flags": [], "start_distance_m": 2156.0, "end_distance_m": 2176.0, "start_elevation_m": 921.2415248235047, "end_elevation_m": 922.524589273125, "min_gradient_pct": -1.460628488915745 }, { "window_m": 25.0, "max_gradient_pct": 6.418489514531757, "diagnostic": false, "flags": [], "start_distance_m": 2162.0, "end_distance_m": 2187.0, "start_elevation_m": 921.6337726895216, "end_elevation_m": 923.2383950681545, "min_gradient_pct": -1.3974955701137333 }, { "window_m": 50.0, "max_gradient_pct": 6.222671173683921, "diagnostic": false, "flags": [], "start_distance_m": 2154.0, "end_distance_m": 2204.0, "start_elevation_m": 921.1335091044356, "end_elevation_m": 924.2448446912775, "min_gradient_pct": -1.1220716940526927 }, { "window_m": 100.0, "max_gradient_pct": 5.923205649032752, "diagnostic": false, "flags": [], "start_distance_m": 1390.0, "end_distance_m": 1490.0, "start_elevation_m": 885.530194035702, "end_elevation_m": 891.4533996847348, "min_gradient_pct": -0.9455124353148676 } ], "shape": { "ascent_concentration": 0.312, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 0.0, "shape_class": "sustained" }, "length_m": 3287.501240278994, "start_elevation_m": 839.8063419506916, "end_elevation_m": 969.4863366382019, "endpoint_gain_m": 129.67999468751032, "overall_gradient_pct": 3.9446371334754238, "accumulated_ascent_m": 131.486698164936, "window_maxima": { "max_5m": { "gradient_pct": 7.077674322263192, "start_distance_m": 2182.0, "end_distance_m": 2187.0, "midpoint_distance_m": 2184.5, "start_elevation_m": 922.8845113520414, "end_elevation_m": 923.2383950681545, "start_xy": [ 765391.8640734539, 6517682.98826021 ], "end_xy": [ 765387.9496986141, 6517686.0986351045 ] }, "max_10m": { "gradient_pct": 6.769981432435088, "start_distance_m": 2177.0, "end_distance_m": 2187.0, "midpoint_distance_m": 2182.0, "start_elevation_m": 922.561396924911, "end_elevation_m": 923.2383950681545, "start_xy": [ 765395.7871886045, 6517679.888394484 ], "end_xy": [ 765387.9496986141, 6517686.0986351045 ] }, "max_20m": { "gradient_pct": 6.415322248101347, "start_distance_m": 2156.0, "end_distance_m": 2176.0, "midpoint_distance_m": 2166.0, "start_elevation_m": 921.2415248235047, "end_elevation_m": 922.524589273125, "start_xy": [ 765413.5677183747, 6517669.0163906915 ], "end_xy": [ 765396.5718116346, 6517679.268421339 ] }, "max_25m": { "gradient_pct": 6.418489514531757, "start_distance_m": 2162.0, "end_distance_m": 2187.0, "midpoint_distance_m": 2174.5, "start_elevation_m": 921.6337726895216, "end_elevation_m": 923.2383950681545, "start_xy": [ 765408.0949789612, 6517671.475887247 ], "end_xy": [ 765387.9496986141, 6517686.0986351045 ] }, "max_50m": { "gradient_pct": 6.222671173683921, "start_distance_m": 2154.0, "end_distance_m": 2204.0, "midpoint_distance_m": 2179.0, "start_elevation_m": 921.1335091044356, "end_elevation_m": 924.2448446912775, "start_xy": [ 765415.3919648458, 6517668.196558505 ], "end_xy": [ 765375.1557833767, 6517697.293086091 ] }, "max_100m": { "gradient_pct": 5.923205649032752, "start_distance_m": 1390.0, "end_distance_m": 1490.0, "midpoint_distance_m": 1440.0, "start_elevation_m": 885.530194035702, "end_elevation_m": 891.4533996847348, "start_xy": [ 765569.8810122455, 6517324.797250634 ], "end_xy": [ 765473.9114639577, 6517349.774654679 ] } }, "window_minima": { "min_5m": { "gradient_pct": -1.9287713152129982, "start_distance_m": 357.0, "end_distance_m": 362.0, "midpoint_distance_m": 359.5, "start_elevation_m": 840.5244319595902, "end_elevation_m": 840.4279933938295, "start_xy": [ 765887.5205875062, 6518024.644815916 ], "end_xy": [ 765882.5253044907, 6518024.861950885 ] }, "min_10m": { "gradient_pct": -1.6959665540400692, "start_distance_m": 352.0, "end_distance_m": 362.0, "midpoint_distance_m": 357.0, "start_elevation_m": 840.5975900492335, "end_elevation_m": 840.4279933938295, "start_xy": [ 765892.5158705218, 6518024.427680947 ], "end_xy": [ 765882.5253044907, 6518024.861950885 ] }, "min_20m": { "gradient_pct": -1.460628488915745, "start_distance_m": 352.0, "end_distance_m": 372.0, "midpoint_distance_m": 362.0, "start_elevation_m": 840.5975900492335, "end_elevation_m": 840.3054643514504, "start_xy": [ 765892.5158705218, 6518024.427680947 ], "end_xy": [ 765872.5347384596, 6518025.296220822 ] }, "min_25m": { "gradient_pct": -1.3974955701137333, "start_distance_m": 348.0, "end_distance_m": 373.0, "midpoint_distance_m": 360.5, "start_elevation_m": 840.6506422758357, "end_elevation_m": 840.3012683833073, "start_xy": [ 765896.5120969343, 6518024.253972972 ], "end_xy": [ 765871.5356818566, 6518025.3396478165 ] }, "min_50m": { "gradient_pct": -1.1220716940526927, "start_distance_m": 333.0, "end_distance_m": 383.0, "midpoint_distance_m": 358.0, "start_elevation_m": 840.7701104903582, "end_elevation_m": 840.2090746433319, "start_xy": [ 765911.4979459809, 6518023.602568066 ], "end_xy": [ 765861.5477059305, 6518025.437478149 ] }, "min_100m": { "gradient_pct": -0.9455124353148676, "start_distance_m": 283.0, "end_distance_m": 383.0, "midpoint_distance_m": 333.0, "start_elevation_m": 841.1545870786467, "end_elevation_m": 840.2090746433319, "start_xy": [ 765961.4571490757, 6518021.59765147 ], "end_xy": [ 765861.5477059305, 6518025.437478149 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 7.696340628143616, "start_distance_m": 1415.0, "end_distance_m": 1417.0, "midpoint_distance_m": 1416.0, "start_elevation_m": 887.0487414787009, "end_elevation_m": 887.2026682912638, "start_xy": [ 765545.0620893493, 6517326.545478879 ], "end_xy": [ 765543.0824477102, 6517326.830117213 ] }, "max_3m": { "gradient_pct": 7.447589990063837, "start_distance_m": 1415.0, "end_distance_m": 1418.0, "midpoint_distance_m": 1416.5, "start_elevation_m": 887.0487414787009, "end_elevation_m": 887.2721691784028, "start_xy": [ 765545.0620893493, 6517326.545478879 ], "end_xy": [ 765542.0926268907, 6517326.97243638 ] } }, "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": 0.027, "obstruction_max_height_m": 26.34, "flagged_windows_m": [] }, "review": [], "extent": [] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "076a8e7f889cfb3c2cf6b3de65a6030c7155b1f0", "code_git_dirty": "false", "analysis_version": "0.1.0", "analysis_config_digest": "sha256:8c94015b54267da4", "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-mc-cols", "road_pbf": "block-batch-fr-mc-cols.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:af4eae1f5df9e232" }, "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_E764-N6518_0m5@22LHD4ML-2025-09-15.tif", "data/cache/fr/ign-lidarhd_dtm_E765-N6517_0m5@22LHD4ML-2025-09-15.tif", "data/cache/fr/ign-lidarhd_dtm_E765-N6518_0m5@22LHD4ML-2025-09-15.tif", "data/cache/fr/ign-lidarhd_dtm_E766-N6517_0m5@22LHD4ML-2025-09-15.tif", "data/cache/fr/ign-lidarhd_dtm_E766-N6518_0m5@22LHD4ML-2025-09-15.tif" ], "calculated_at": "2026-09-22T22:25:41+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-fr-mc-cols.osm.pbf", "osm_snapshot": "", "run_id": "fr-mc-cols", "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": [ "E764-N6518", "E765-N6517", "E765-N6518", "E766-N6517", "E766-N6518" ], "elevation_blocks": [ "22LHD4ML@2025-09-15" ], "ign_dalles": [ "LHD_FXX_0764_6519_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0765_6518_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0765_6519_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0766_6518_MNT_O_0M50_LAMB93_IGN69", "LHD_FXX_0766_6519_MNT_O_0M50_LAMB93_IGN69" ], "ign_missions": [ "22LHD4ML" ], "ign_editions": [ "2025-09-15" ], "ign_dsm_edition": { "LHD_FXX_0764_6519_MNT_O_0M50_LAMB93_IGN69": "2025-09-15", "LHD_FXX_0765_6518_MNT_O_0M50_LAMB93_IGN69": "2025-09-15", "LHD_FXX_0765_6519_MNT_O_0M50_LAMB93_IGN69": "2025-09-15", "LHD_FXX_0766_6518_MNT_O_0M50_LAMB93_IGN69": "2025-09-15", "LHD_FXX_0766_6519_MNT_O_0M50_LAMB93_IGN69": "2025-09-15" }, "climb_origin": "named-pass", "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked", "carriageway": { "stations": 138, "stations_resolved": 138, "width_median_m": 6.75, "width_p10_m": 5.75, "width_min_m": 5.25, "width_max_m": 12.0, "bounded_share": 0.196, "unbounded_share": 0.804, "confidence_median": 0.0, "width_median_bounded_m": 7.25, "window_m": [ 2162.0, 2187.0 ], "width_at_max25_m": 9.25, "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": 138, "stations_resolved": 138, "width_median_m": 9.38, "width_p10_m": 6.68, "width_min_m": 0.5, "width_max_m": 12.0, "bounded_share": 0.645, "unbounded_share": 0.355, "confidence_median": 1.0, "width_median_bounded_m": 9.0, "window_m": [ 2162.0, 2187.0 ], "width_at_max25_m": 11.5, "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 Valla-sur-Rochefort", "county": "Loire", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }