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  "calculated_at": "2026-08-24T20:53:52+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/maine-2026-08-22.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-me-1-260824",
  "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, ME_WesternMtns_B24 (collected 2024)",
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  "notes": "Coarse pass: max 13.5% over 200 m (Terrain 50), gain 63.8 m over 2004 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). TRIMMED to survey coverage: 120 m at base, 0 m at top (re-extend when new tiles land). ADOPTED (NE wave 1, 2026-08-25): clean-steep,qualified-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'. Slug suffixed -me (suffix(ct:warren-hill-road)); doc slug patched at corpus copy.",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Jay",
  "county": "Maine"
 }
}