Page Comparison

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• Image files are encoded in compliance with the JPEG2000 standard
  • Data compression: irreversible 9-7 wavelet transform for lossy compression, or reversible 5-3 wavelet transform for lossless compression.
  • Photometric interpretation:
    • RGB (color), 8-bits per channel, embedded sRGB ICC profile.
    • Grayscale, 8 or 16-bits per channel, embedded sGray ICC profile.
• OCR plain text files are in UTF-8 encoding. (optional, not available for photograph, film, and art objects)
• OCR alto files conform to the ALTO standard. (optional, not available for photograph, film, and art objects)
• Structural metadata files conform to the METS standard and Harvard's METS profile for page-turned objects. (optional, not available for photograph, film, and art objects)
• MARC record files are in MARCXML or MODS format. (optional, not available for photograph, film, and art objects).
• Packaging tag files generated by the packaging application (Bagit) describe the package. (optional)

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• Hard disk, flash drive
  • The repositories can borrow the media from Imaging Services or pay for them
  • Recommended for large sets of data
• Google shared drive
  • A google account from the data recipient needs to be provided to Imaging Services
• MS shared directory
  • The data recipient's email address needs to be provided to Imaging Services
  • Suitable for small sets of data
• Secure file transfer (https://filetransfer.harvard.edu)
  • The data recipient's email address needs to be provided to Imaging Services.
  • The data recipient outside Harvard University needs to set up a guest account.
  • Suitable for small sets of data which need encryption during file transfer.

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   In cases where the record identifier includes space, the spaces will be replaced by underscores.

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   MARCXML and MODS XML record files are only available for items that have been cataloged in Harvard’s bibliographic database, HOLLIS.

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   Batch level identifiers are assigned to groups of titles prepared and submitted together for scanning. These named “batches” will be maintained from scanning all the way through deposit to Harvard's Digital Repository Service and transfer of data to project partners beyond the Harvard libraries. Inclusion of technical metadata is optional.