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 "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.",
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  "calculated_at": "2026-09-22T00:20:47+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/valley-260921/us/batch-usa-pa-west-chunk000.pbf",
  "osm_snapshot": "",
  "run_id": "remeasure-valley-260921-us",
  "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, PA_WesternPA_2019_D20 (collected 2020)",
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  "canopy_check": "unavailable \u2014 EPT corridor failed: PA_WesternPA_2019_D20: HTTP Error 404: Not Found",
  "structure_own_ways": 2,
  "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)",
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   "slug": "carr-road",
   "calculated_at": "2026-09-07T23:05:26+00:00",
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   "analysis_version": "0.1.0",
   "run_id": "pa-run4-260907",
   "path": "/root/uk-climbs/output/valley-260921/us/priors/carr-road/carr-road.json",
   "spans": 0,
   "sources": []
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  "carriageway": {
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   "stations_resolved": 63,
   "width_median_m": 7.25,
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   "width_min_m": 3.5,
   "width_max_m": 12.0,
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   "confidence_median": 0.0,
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   "width_at_max25_m": 6.25,
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   "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,
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   "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)"
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  "unmapped_bridge_span": {
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   "end_m": 700.0,
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   "depth_m": 10.6,
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   "note": "The ground falls 6 m below the road between 530 m and 700 m \u2014 11 m below the straight line joining the profile either side of it \u2014 and climbs back to that line, with the steepest 25 m at 689 m. That is a ravine under a deck OSM does not tag as a bridge, so no mask fired. Re-measure with mask_ranges_m over the span before this maximum stands (unmapped-bridge-span, Peter 2026-09-20)."
  },
  "remeasured": {
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   "why": "valley-crossing extent re-measure 2026-09-22: low-to-summit (229.0 m -> 1622.0 m)",
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   "max25_pct": 20.56
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  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "North Union",
  "county": "Pennsylvania"
 },
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   "status": "pending-human-review",
   "noted": "2026-09-21",
   "figure_adjusted": false
  }
 ]
}