Reference data
The authoritative datasets from outside sources that the analysis draws on — EPA, USGS, BLS/Census, county and city GIS, GLEIF. Each is committed, regenerable from its source, and documented here with its provenance and known gaps.
5 documented datasets over 8 catalog entries — one README can document several, so the states below count entries. Each is regenerable from its source and none is hand-edited; here is how each stands against the file on disk today:
Reconciled against the files in this checkout by the catalog, not asserted here. The most recent pull in this set landed 2026-07-28.