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  "elevation_provider": "USGS 3DEP (The National Map)",
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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): big-gain,clean-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_url": "https://howsteep.org/licensing.html"
 },
 "area": {
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  "county": "Maine"
 }
}