CALM → AtoM
Croydon Borough Archives
Croydon's borough archivist migrated more than 1,000 collection and accession records from an ageing CALM system into a hosted instance of AtoM. Because the original CALM installation had been shared across Archives, Museums and Local Studies, the data was structurally diverse and often unclean, and the borough worked with an external developer to cleanse it — a task that, by the archivist's own account, absorbed a disproportionate share of the project's time. The experience, shared at an open-source archives software event hosted at King's College London, is a candid reminder that data cleaning, not the software switch itself, is usually the hardest part of a migration.
Original source
'Bone' up on your history — open source archive software
King's College London — King's Collections blog
The archived copy opens a snapshot on the Internet Archive's Wayback Machine, preserved for when the original moves or disappears.
The Archive Migration Review summarises this story in its own words and links to the original source for verification. We are editorially independent and not affiliated with the institution or software project named above. Summaries are compiled in good faith from publicly available accounts; corrections are welcome.