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Diagnostic use only: never a headline or ranking value.", "quality_summary": { "overhead_obstruction": { "obstruction_threshold_m": 2.0, "obstructed_fraction": 0.014, "obstruction_max_height_m": 7.16, "flagged_windows_m": [ 2, 10, 20, 25 ] }, "review": [], "extent": [ "may_continue_beyond_end" ] }, "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-chunk001.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/E222000_N102000_2000m.tif", "data/cache/england/dtm_1m/E224000_N102000_2000m.tif", "data/cache/england/dtm_1m/E222000_N104000_2000m.tif", "data/cache/england/dtm_1m/E224000_N104000_2000m.tif" ], "calculated_at": "2026-09-22T00:07:02+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "output/valley-260921/uk/batch-england-chunk001.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": [ "E222000_N102000_2000m.tif", "E224000_N102000_2000m.tif", "E222000_N104000_2000m.tif", "E224000_N104000_2000m.tif" ], "route_base_cut_m": 1226.0, "climb_origin": "discovered", "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked", "prior_doc": { "slug": "discovered-lane-50-8176-4-5103", "calculated_at": "2026-09-05T01:52:00+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-50-8176-4-5103/discovered-lane-50-8176-4-5103.json", "spans": 0, "sources": [] }, "carriageway": { "stations": 68, "stations_resolved": 68, "width_median_m": 5.75, "width_p10_m": 2.0, "width_min_m": 1.0, "width_max_m": 12.0, "bounded_share": 0.162, "unbounded_share": 0.838, "confidence_median": 0.0, "width_median_bounded_m": 2.0, "window_m": [ 146.0, 171.0 ], "width_at_max25_m": 2.25, "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": 68, "stations_resolved": 68, "width_median_m": 4.75, "width_p10_m": 2.25, "width_min_m": 1.25, "width_max_m": 12.0, "bounded_share": 0.662, "unbounded_share": 0.338, "confidence_median": 1.0, "width_median_bounded_m": 3.75, "window_m": [ 146.0, 171.0 ], "width_at_max25_m": 2.25, "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 (1226.0 m -> 2752.0 m)", "published_max25_pct": 21.29, "max25_pct": 21.18 }, "license": "ODbL-1.0", "license_url": "https://howsteep.org/licensing" }, "area": { "place": "Marhamchurch", "county": "Cornwall" } }