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Build a clean open dataset from scattered public sources
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Scattered public data, cleaned and joined.
Choose a useful public dataset that exists today only as scattered files, pages or inconsistent formats (for example every public transit feed in a country, or the prices on public procurement notices), and build one clean, documented, openly licensed version of it. Publish the collection code, the schema, a data dictionary, the known gaps and errors, a sample, and a browsable artifact. Respect each source’s terms and record where every row came from.