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{ "gradient_pct": 32.07137341461627, "start_distance_m": 2122.0, "end_distance_m": 2125.0, "midpoint_distance_m": 2123.5, "start_elevation_m": 1557.288612031468, "end_elevation_m": 1558.2507532339064, "start_xy": [ 2624951.665910707, 1176502.6948675748 ], "end_xy": [ 2624948.6942098862, 1176502.2837785399 ] } }, "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": { "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-ch", "road_pbf": "batch-switzerland-chunk000.pbf", "region_key": "switzerland", "crs": "EPSG:2056", "elevation_provider_key": "swisstopo", "tile_index": "stac", "authority": "swisstlm3d", "registry_pbf": "switzerland-2026-09-10.osm.pbf", "tile_index_snapshot": "sha256:9223aa61513e7f9d" }, "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:2056", "elevation_resolution_m": 0.5, "elevation_tiles": [ "data/cache/ch/swissalti3d_2025_2624-1176_0.5_2056_5728.tif", "data/cache/ch/swissalti3d_2025_2625-1176_0.5_2056_5728.tif", "data/cache/ch/swissalti3d_2025_2625-1177_0.5_2056_5728.tif", "data/cache/ch/swissalti3d_2025_2626-1176_0.5_2056_5728.tif", "data/cache/ch/swissalti3d_2025_2626-1177_0.5_2056_5728.tif", "data/cache/ch/swissalti3d_2025_2626-1178_0.5_2056_5728.tif" ], "calculated_at": "2026-09-21T23:51:17+00:00", "road_source": "OpenStreetMap (local PBF extract)", "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL", "osm_pbf_path": "output/valley-260921/ch/batch-switzerland-chunk000.pbf", "osm_snapshot": "", "run_id": "remeasure-valley-260921-ch", "elevation_provider": "swisstopo swissALTI3D", "elevation_licence": "swisstopo open government data (OGD): free use, attribution '\u00a9 swisstopo' \u2014 https://www.swisstopo.admin.ch/en/terms-and-conditions", "elevation_dataset": "swissALTI3D 0.5 m DTM (Federal Office of Topography swisstopo)", "elevation_tile_ids": [ "2624-1176", "2625-1176", "2625-1177", "2626-1176", "2626-1177", "2626-1178" ], "route_base_cut_m": 1704.0, "climb_origin": "discovered", "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage", "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked", "prior_doc": { "slug": "zettenalpstrasse", "calculated_at": "2026-09-11T01:46:13+00:00", "code_git_sha": null, "analysis_version": "0.1.0", "run_id": "ch-run7-260911", "path": "/root/uk-climbs/output/valley-260921/ch/priors/zettenalpstrasse/zettenalpstrasse.json", "spans": 0, "sources": [] }, "carriageway": { "stations": 101, "stations_resolved": 101, "width_median_m": 3.75, "width_p10_m": 3.0, "width_min_m": 1.5, "width_max_m": 8.25, "bounded_share": 0.248, "unbounded_share": 0.752, "confidence_median": 0.0, "width_median_bounded_m": 3.75, "window_m": [ 2117.0, 2142.0 ], "width_at_max25_m": 3.5, "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": { "status": "unavailable \u2014 no DSM raster (surface model absent or point-cloud only, which cannot serve off-line samples)" } }, "remeasured": { "on": "2026-09-22", "why": "valley-crossing extent re-measure 2026-09-22: low-to-summit (1704.0 m -> 3949.0 m)", "published_max25_pct": 29.34, "max25_pct": 29.4 }, "license": "ODbL-1.0", "license_url": "https://howsteep.org/licensing" }, "area": { "place": "Sigriswil", "county": "Bern/Berne", "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)" } }