Knowledge
Each source has a page with its publisher, update schedule, coverage, known limits, and request fields. Coverage tells you where a source is available, not which fields a property will return. You can get the same details as JSON at /api/knowledge/data-sources.
Last verified . That is when this list was last rebuilt from the ParcelOps source registry, not when each publisher last refreshed its own data.
Official agricultural land asset-value statistics for one state or county and year.
Section 514/515, Section 538, assignments, and program-exit property snapshots.
Point and small-area screening against official Rural Development program maps.
