Northeast Massachusetts Digital Library (NMDL)
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The following standards are the minimum recommendations approved by the NMRLS Digital Library Committee on December 4, 2002.


Scan Size (ratio) of Original Item: 1:1 ratio
The scanned image should not be manipulated to increase or decrease its output size.

Resolution Bit-Depth
Color Photographs: 24 bit
Black & White Photographs: 8 bit gray scale
Black & White Text: 1 bit

Resolution DPI
Digital Master: 600dpi
Access Image for printing (also for detail view): 300dpi
Web Viewing: 72dpi

Image File Formats
Digital Master: Uncompressed TIFF
Web Images: JPEG
Access image (for printing or detailed web viewing): JPEG

Image Editing Software: JASC Paint Shop Pro
Chosen for ease of use, pricing, and support available from NMRLS staff.

Metadata Scheme: Dublin Core
Other cataloging schemes may be used initially by participants (MARC, EAD, etc.), but final output will be to the Dublin Core standard.

Data Back-up, Standard Media: CD-R (Compact Disc Recordable)
Images and Dublin Core data to be burned to CD-R in ISO9660 format. Images can be in both TIFF and JPEG formats, text in plain-text ASCII format.