California Revealed Digital Preservation Service

The California Revealed Digital Preservation Service (CRDPS) offers California libraries, archives, and museums a comprehensive array of digital preservation services. The CRDPS works with partners to identify, preserve, and provide online access to moving image and sound recordings, photographs, books, documents, manuscripts, and ephemera that bring California history to life. The resulting California Revealed Collection currently includes more than 18,000 digital objects from over 200 partner organizations.

California Revealed is a State Library-supported project. Additionally, if your institution is digitizing materials in-house, the CRDPS team of librarians and digital archivists is available for technical advice and guidance at no cost to you. If your content is related to California history, the CDPS can serve and preserve your digital objects as part of the California Light and Sound Collection, again at no cost to you. For more information, please contact

CRDPS services include:
● Assisting partner institutions to identify historically important records in their collections.
● Managing the complete digitization workflow including communicating with vendors, shipping archival materials, and tracking physical and digital objects.
● Maintaining and updating digitization procedures in accordance with FADGI guidelines and best practices for digital capture.
● Packaging digital objects for ingest in the digital repository.
● Maintaining a digital repository to serve and preserve partner digital assets.
● Aggregating, standardizing, and mapping metadata for ingest to the digital repository.
● Assisting with minimum cataloging for unprocessed collections with an eye towards improving discoverability.
● Providing expert quality control of content to ensure that digital files meet playback standards and file specifications. Because of the intensive nature of QC, we are often able to correct or enhance cataloging information during the course of this review for better discoverability and user engagement.
● Ensuring offline preservation storage on redundant, geographically dispersed Linear Tape-Open (LTO) data tape.
● Performing regularly scheduled file integrity checks on preservation storage files.
● Providing free public online access at
● Helping facilitate creation and maintenance of partners’ institutional accounts at the Internet Archive.
● Compiling all necessary descriptive, rights, administrative, and technical metadata in a content management system.
● Tracking and maintaining metadata updates.
● Exposing your collection via, WorldCat, Calisphere and Digital Public Library of America
● Delivering local workshops on best practices for digital preservation, access, and outreach catered to partners’ collection needs. Workshops often include multiple organizations from local areas interested in undertaking local history projects.