{ "ocl_version": "0.1.0", "name": "Discovered lane (50.3097, -5.0600)", "slug": "discovered-lane-50-3097-5-0600", "confidence": "A", "reported_claims": [], "ladder": [ { "window_m": 2.0, "max_gradient_pct": 27.883878378547422, "diagnostic": true, "flags": [], "start_distance_m": 169.0, "end_distance_m": 171.0, "start_elevation_m": 57.40945237752388, "end_elevation_m": 57.967129945094825, "min_gradient_pct": -15.966844064721286 }, { "window_m": 3.0, "max_gradient_pct": 27.273208502646423, "diagnostic": true, "flags": [], "start_distance_m": 168.0, "end_distance_m": 171.0, "start_elevation_m": 57.14893369001543, "end_elevation_m": 57.967129945094825, "min_gradient_pct": -14.035649938438155 }, { "window_m": 5.0, "max_gradient_pct": 25.544901649711704, "diagnostic": false, "flags": [], "start_distance_m": 166.0, "end_distance_m": 171.0, "start_elevation_m": 56.68988486260924, "end_elevation_m": 57.967129945094825, "min_gradient_pct": -10.597269426877176 }, { "window_m": 10.0, "max_gradient_pct": 22.441614267537915, "diagnostic": false, "flags": [], "start_distance_m": 162.0, "end_distance_m": 172.0, "start_elevation_m": 55.91616513184765, "end_elevation_m": 58.16032655860144, "min_gradient_pct": -8.47728430012566 }, { "window_m": 20.0, "max_gradient_pct": 21.581300612484853, "diagnostic": false, "flags": [], "start_distance_m": 151.0, "end_distance_m": 171.0, "start_elevation_m": 53.650869822597855, "end_elevation_m": 57.967129945094825, "min_gradient_pct": -7.317315351839682 }, { "window_m": 25.0, "max_gradient_pct": 21.216694525889608, "diagnostic": false, "flags": [], "start_distance_m": 147.0, "end_distance_m": 172.0, "start_elevation_m": 52.85615292712904, "end_elevation_m": 58.16032655860144, "min_gradient_pct": -7.092346720783155 }, { "window_m": 50.0, "max_gradient_pct": 18.989053772637476, "diagnostic": false, "flags": [], "start_distance_m": 134.0, "end_distance_m": 184.0, "start_elevation_m": 50.528444273732866, "end_elevation_m": 60.022971160051604, "min_gradient_pct": -6.863961028887871 }, { "window_m": 100.0, "max_gradient_pct": 16.213929138276427, "diagnostic": false, "flags": [], "start_distance_m": 111.0, "end_distance_m": 211.0, "start_elevation_m": 47.463139359717125, "end_elevation_m": 63.67706849799355, "min_gradient_pct": -6.240425583182414 } ], "shape": { "ascent_concentration": 0.575, "concentration_window_frac": 0.25, "longest_pitch_10pct_m": 148.0, "shape_class": "stepped" }, "length_m": 1598.235383912814, "start_elevation_m": 42.10127528984103, "end_elevation_m": 94.1946830253909, "endpoint_gain_m": 52.093407735549874, "overall_gradient_pct": 3.259432763152467, "accumulated_ascent_m": 69.38425343689255, "window_maxima": { "max_5m": { "gradient_pct": 25.544901649711704, "start_distance_m": 166.0, "end_distance_m": 171.0, "midpoint_distance_m": 168.5, "start_elevation_m": 56.68988486260924, "end_elevation_m": 57.967129945094825, "start_xy": [ 183081.69321820812, 49795.09725979333 ], "end_xy": [ 183086.1481580892, 49797.36713218014 ] }, "max_10m": { "gradient_pct": 22.441614267537915, "start_distance_m": 162.0, "end_distance_m": 172.0, "midpoint_distance_m": 167.0, "start_elevation_m": 55.91616513184765, "end_elevation_m": 58.16032655860144, "start_xy": [ 183080.15534948753, 49791.63755968278 ], "end_xy": [ 183087.03973694003, 49797.81999757156 ] }, "max_20m": { "gradient_pct": 21.581300612484853, "start_distance_m": 151.0, "end_distance_m": 171.0, "midpoint_distance_m": 161.0, "start_elevation_m": 53.650869822597855, "end_elevation_m": 57.967129945094825, "start_xy": [ 183077.4843991773, 49780.96675803292 ], "end_xy": [ 183086.1481580892, 49797.36713218014 ] }, "max_25m": { "gradient_pct": 21.216694525889608, "start_distance_m": 147.0, "end_distance_m": 172.0, "midpoint_distance_m": 159.5, "start_elevation_m": 52.85615292712904, "end_elevation_m": 58.16032655860144, "start_xy": [ 183076.51237439038, 49777.086659089124 ], "end_xy": [ 183087.03973694003, 49797.81999757156 ] }, "max_50m": { "gradient_pct": 18.989053772637476, "start_distance_m": 134.0, "end_distance_m": 184.0, "midpoint_distance_m": 159.0, "start_elevation_m": 50.528444273732866, "end_elevation_m": 60.022971160051604, "start_xy": [ 183077.2453467735, 49764.38342993066 ], "end_xy": [ 183098.2411173907, 49800.46226948202 ] }, "max_100m": { "gradient_pct": 16.213929138276427, "start_distance_m": 111.0, "end_distance_m": 211.0, "midpoint_distance_m": 161.0, "start_elevation_m": 47.463139359717125, "end_elevation_m": 63.67706849799355, "start_xy": [ 183082.16506444153, 49741.921356143415 ], "end_xy": [ 183125.02897645312, 49797.08432153922 ] } }, "window_minima": { "min_5m": { "gradient_pct": -10.597269426877176, "start_distance_m": 36.0, "end_distance_m": 41.0, "midpoint_distance_m": 38.5, "start_elevation_m": 42.62486809872371, "end_elevation_m": 42.09500462737985, "start_xy": [ 183103.17355789538, 49669.9940180325 ], "end_xy": [ 183101.96841794494, 49674.84451433207 ] }, "min_10m": { "gradient_pct": -8.47728430012566, "start_distance_m": 1116.0, "end_distance_m": 1126.0, "midpoint_distance_m": 1121.0, "start_elevation_m": 91.10427141202254, "end_elevation_m": 90.25654298200998, "start_xy": [ 183901.2367715384, 49554.83398903668 ], "end_xy": [ 183910.07671651753, 49559.50895997024 ] }, "min_20m": { "gradient_pct": -7.317315351839682, "start_distance_m": 1082.0, "end_distance_m": 1102.0, "midpoint_distance_m": 1092.0, "start_elevation_m": 93.33852650785732, "end_elevation_m": 91.87506343748939, "start_xy": [ 183869.29081011235, 49543.78698775652 ], "end_xy": [ 183888.64457573826, 49548.8299732017 ] }, "min_25m": { "gradient_pct": -7.092346720783155, "start_distance_m": 1072.0, "end_distance_m": 1097.0, "midpoint_distance_m": 1084.5, "start_elevation_m": 93.99734942819684, "end_elevation_m": 92.22426274800105, "start_xy": [ 183859.48330860326, 49542.88264363326 ], "end_xy": [ 183883.80617208665, 49547.5690819895 ] }, "min_50m": { "gradient_pct": -6.863961028887871, "start_distance_m": 1076.0, "end_distance_m": 1126.0, "midpoint_distance_m": 1101.0, "start_elevation_m": 93.68852349645391, "end_elevation_m": 90.25654298200998, "start_xy": [ 183863.4586412213, 49542.45428914541 ], "end_xy": [ 183910.07671651753, 49559.50895997024 ] }, "min_100m": { "gradient_pct": -6.240425583182414, "start_distance_m": 1054.0, "end_distance_m": 1154.0, "midpoint_distance_m": 1104.0, "start_elevation_m": 94.96250763517365, "end_elevation_m": 88.72208205199124, "start_xy": [ 183841.59848536496, 49544.9156420058 ], "end_xy": [ 183936.6806125531, 49568.07360691031 ] } }, "diagnostic_window_maxima": { "max_2m": { "gradient_pct": 27.883878378547422, "start_distance_m": 169.0, "end_distance_m": 171.0, "midpoint_distance_m": 170.0, "start_elevation_m": 57.40945237752388, "end_elevation_m": 57.967129945094825, "start_xy": [ 183084.36552450847, 49796.460371046385 ], "end_xy": [ 183086.1481580892, 49797.36713218014 ] }, "max_3m": { "gradient_pct": 27.273208502646423, "start_distance_m": 168.0, "end_distance_m": 171.0, "midpoint_distance_m": 169.5, "start_elevation_m": 57.14893369001543, "end_elevation_m": 57.967129945094825, "start_xy": [ 183083.47411882656, 49796.00716479061 ], "end_xy": [ 183086.1481580892, 49797.36713218014 ] } }, "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": 0.013, "obstruction_max_height_m": 7.99, "flagged_windows_m": [] }, "review": [], "extent": [] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "8f4becd2ed8ab26772f5cd961ca7d1d0c2823252", "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": "remeasure-valley-260921-uk", "road_pbf": "batch-england-chunk000.pbf", "region_key": "england", "crs": "EPSG:27700", "elevation_provider_key": "england", "authority": "os-open-roads", "registry_pbf": "england-2026-08-27.osm.pbf" }, "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:27700", "elevation_resolution_m": 1.0, "elevation_tiles": [ "data/cache/england/dtm_1m/E182000_N48000_2000m.tif", "data/cache/england/dtm_1m/E184000_N48000_2000m.tif", "data/cache/england/dtm_1m/E182000_N50000_2000m.tif", "data/cache/england/dtm_1m/E184000_N50000_2000m.tif" ], "calculated_at": "2026-09-22T00:07:30+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "output/valley-260921/uk/batch-england-chunk000.pbf", "osm_snapshot": "", "run_id": "remeasure-valley-260921-uk", "elevation_provider": "Environment Agency", "elevation_dataset": "EA LIDAR Composite DTM 1m (2022)", "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Environment Agency", "elevation_coverage_id": "13787b9a-26a4-4775-8523-806d13af58fc__Lidar_Composite_Elevation_DTM_1m", "elevation_tile_ids": [ "E182000_N48000_2000m.tif", "E184000_N48000_2000m.tif", "E182000_N50000_2000m.tif", "E184000_N50000_2000m.tif" ], "route_base_cut_m": 1458.0, "climb_origin": "discovered", "structure_own_ways": 6, "structure_own_ways_source": "map-matched to the road network: the entry carried no way list, so the ways the route runs along were found by geometry (ukclimb.batch.own_ways_by_geometry)", "prior_doc": { "slug": "discovered-lane-50-3097-5-0600", "calculated_at": "2026-09-05T01:35:08+00:00", "code_git_sha": null, "analysis_version": "0.1.0", "run_id": "hunt-england-260905", "path": "/root/uk-climbs/output/valley-260921/uk/priors/discovered-lane-50-3097-5-0600/discovered-lane-50-3097-5-0600.json", "spans": 2, "sources": [ "excluded_ranges_m" ] }, "carriageway": { "stations": 70, "stations_resolved": 70, "width_median_m": 4.88, "width_p10_m": 2.75, "width_min_m": 2.0, "width_max_m": 12.0, "bounded_share": 0.143, "unbounded_share": 0.857, "confidence_median": 0.0, "width_median_bounded_m": 3.5, "window_m": [ 147.0, 172.0 ], "width_at_max25_m": 4.75, "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": 70, "stations_resolved": 70, "width_median_m": 4.38, "width_p10_m": 2.75, "width_min_m": 2.0, "width_max_m": 12.0, "bounded_share": 0.8, "unbounded_share": 0.2, "confidence_median": 1.0, "width_median_bounded_m": 4.0, "window_m": [ 147.0, 172.0 ], "width_at_max25_m": 4.25, "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 } }, "remeasured": { "on": "2026-09-22", "why": "valley-crossing extent re-measure 2026-09-22: low-to-summit (1458.0 m -> 2476.0 m)", "published_max25_pct": 21.19, "max25_pct": 21.22 }, "license": "ODbL-1.0", "license_url": "https://howsteep.org/licensing" }, "area": { "place": "St Allen", "county": "Cornwall" } }