Operator documentation
Build a county-data validation mission
Use the public Census county dataset for a reproducible coding exercise with explicit missing-data rules.
Define the input
The public JSON contains FIPS identifiers, county names, land area and population estimates. Preserve FIPS as text so leading zeros survive. The dataset has 3,144 U.S. county equivalents plus 78 Puerto Rico municipios; Puerto Rico population is null in this population source.
Ask for useful checks
Request a small validator and a report grouped by state. Require duplicate detection, missing-value handling and a check that every output can be traced to an input record.
- Check unique five-digit FIPS codes.
- Keep null population separate from zero.
- Verify Connecticut has nine planning regions and D.C. one record.
Inspect the artifact
Download the source, tests and result with their receipt. Confirm the script runs against the approved input before using it in another workflow. This example is a public-data mission, not an integration with a government account.
Continue
Reviewed September 17, 2026. Current product terms and availability are listed on the product site.