Imaging Standards

General Guidelines

Image files are saved as TIFFs, in 24 bit color, captured at or near 100% of the original size of the item.


These files are suitable for full-size, full-color publication. Higher resolution scans are available upon request. Standards may vary to suit the particular needs of a collection.

LIS flatbed scanners

Format Bit Depth Resolution
Text (manuscript, typescript, etc.) 24 bit color 300 dpi
Artwork 24 bit color 600 dpi
Rare books 24 bit color 600 dpi
Maps 24 bit color 600 dpi
24 bit color 600 dpi
Slides (positives and negatives) 24 bit color

35 mm 2800 dpi
4 x 5 mm 800 dpi

Bookeye Color Scanner (a.k.a ILL Orbital Scanner)

File Format Bit Depth Resolution
TIFF, JPEG up to 600 dpi

Related scanning links

Scanning negatives with the Nikon Scanners
Using the Scanners from Public Computer Labs
Scanning and OCR using Adobe Acrobat Professional 9 on Mac and PC


Our general imaging standards are based on community best practices acrossthe library and museum world. Some of the institutions that provided us with guidance are listed below:

California Digital Library Guidelines
Harvard University Library Digital Projects Guide
National Archives and Records Administration (NARA) Guidelines
Beinecke Rare Book & Manuscript Library, Yale University
University of Vermont Center for Digital Initiatives Imaging Standards

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