Entries on this hub carry a source rating: a signal of how well their claims are corroborated. This page explains how those ratings work, how links are checked, and how the hub is maintained. The engine behind it is Crawl, the DAAC public-source engine.
Material claims are rated by the number, diversity and reliability of the independent sources behind them. A body publishing about itself counts as one source. Figures are dated.
Every external link is checked with a real request to the URL before it is published, and re-checked on later maintenance passes. Nothing ships on a dead link.
A link check covers the link and an editorial read. Re-verifying every claim on the live page is what the source rating is for.
The hub is re-scanned on a set cadence. New entries are added, links re-checked, entries re-dated. Every refresh lands in the dated Updates feed. Candidates that fail verification are parked and retried on later passes, so coverage compounds.
If something is missing, wrong or out of date, tell us. Reports are logged when they arrive and handled in the next maintenance pass.
Crawl is a DAAC product: an agentic engine that scans a sector’s scattered public information, verifies findings by corroboration, organises them into a navigable hub, and maintains their freshness. This hub runs on it, alongside DAAC’s other reference hubs.