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Diagnostic use only: never a headline or ranking value.", "quality_summary": { "review": [], "extent": [ "may_start_earlier" ] }, "provenance": { "analysis_version": "0.1.0", "run_manifest": { "manifest_version": "1", "code_git_sha": "df76949036663033d9910b89cee4f0cc7be92656", "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": "us-west-seattle", "road_pbf": "block-batch-us-west-seattle.osm.pbf", "region_key": "usa-wa", "crs": "EPSG:26910", "elevation_provider_key": "usa3dep", "authority": "usa-inventory", "registry_pbf": "washington-2026-09-29.osm.pbf", "tile_index_snapshot": "sha256:3e3f861ed425fcdb" }, "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:26910", "elevation_resolution_m": 1.0, "elevation_tiles": [ "data/cache/usa/wa/USGS_1M_10_x54y527_WA_KingCounty_2021_B21.tif" ], "calculated_at": "2026-09-29T04:15:25+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "data/cache/pbf/block-batch-us-west-seattle.osm.pbf", "osm_snapshot": "", "run_id": "us-west-seattle", "elevation_provider": "USGS 3DEP (The National Map)", "elevation_licence": "Public domain \u2014 USGS 3DEP 1 m DEM, courtesy of the U.S. Geological Survey", "elevation_dataset": "USGS 3DEP 1 m DEM, WA_KingCounty_2021_B21 (collected 2021)", "elevation_tile_ids": [ "x54y527" ], "climb_origin": "discovered", "seam_filled_samples": { "count": 0, "distances_m": [] }, "seam_filled_in_maximum": false, "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage", "structure_own_ways": 6, "carriageway": { "stations": 35, "stations_resolved": 35, "width_median_m": 8.75, "width_p10_m": 6.0, "width_min_m": 5.25, "width_max_m": 12.0, "bounded_share": 0.029, "unbounded_share": 0.971, "confidence_median": 0.0, "width_median_bounded_m": 5.25, "window_m": [ 55.0, 80.0 ], "width_at_max25_m": 6.38, "window_stations": 6, "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": { "status": "unavailable \u2014 no DSM raster (surface model absent or point-cloud only, which cannot serve off-line samples)" } }, "license": "ODbL-1.0", "license_url": "https://howsteep.org/licensing" }, "area": { "place": "Seattle", "county": "Washington" } }