Digitization standards

Preservation

  Resolution (dpi) Bit depth File format
Book 600 24 bit color TIFF
Photograph 600 24 bit color TIFF
Slide 2700 (300 @ 900%) 24 bit color TIFF
Film 2700 (300 @ 900%) 24 bit color TIFF
Overside item (maps, large books, etc.) 400 or as high as possible 24 bit color TIFF

 

OCR

  Resolution (dpi) Bit depth File format
Book 300 black and white JPEG or TIFF

 

GIS

  Resolution (dpi) Bit depth File format
Map 400 or as high as possible 24 bit color TIFF

 

Web

  Resolution (dpi) Bit depth File format
Book/photograph 72-200 24 bit color JPEG or TIFF
Slide/film 72-200 @ 900% 24 bit color JPEG or TIFF

 

Deliverable

  Resolution (dpi) Bit depth File format
Web: thumbnail 72 dpi, size: 120 pixels on longest side 24 bit color JPEG or GIF
Web: screen-size 72-300 dpi, size: 1024 x 768 pixels 24 bit color JPEG or GIF
Web: screen-height page image 72-300 dpi, size: 650-850 pixels x proportional pixel height 24 bit color JPEG or GIF
Print: color 300-400 24 bit color JPEG or TIFF
Print: black and white 300-400 8 bit grayscale JPEG or TIFF