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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.",
 "quality_summary": {
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  "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_CrownofMaine_2018_A18 (collected 2018)",
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  "notes": "NE box session: masked re-batch, xsection channel-crossing evidence (calibrated vs the NHD-confirmed population, 2026-08-25) + manifest masks where present. ADOPTED (NE wave 2, 2026-08-25): clean-steep,qualified-steep. Wales dials; max25-contaminated class resolved by the box session \u2014 doc era: masked re-batch. Evidence in ne-adoption-audits (triage, xsection, mask manifest).",
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  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
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  "county": "Maine"
 }
}