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At one level of digitization of print materials is a quickly derived Reference image that can be created using automated flatbed or orbital scanners. These devices require no specialized skill in lighting, composition or focusing as devices automatically determine settings. This can be a very useful image, often made from text-based material slated for optical character recognition (See Digitization Optimized for OCR), but not optimized for deep zoom and detailed online research of materials. Files created by these devices (PDF, JPEG) are not intended for optimized enhancement and are often low-resolution, ideal for reference, speedy transfer, and portability, but insufficient for quality reproduction.
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As both types of images may be ingested to the PUL repository it is desirable to follow best practices recommendations. Staff will need to consider what type of image is appropriate to the material being digitized and its intended use. Additional considerations are the availability and functionality of equipment, timeframe, quality of the source material, and storage costs.
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- For material that has been described bibliographically, the directory name containing the image files should be the bibliographic metadata management system ID number, the 001 field in the catalog record: 6124186 (bib MMS ID)/00000001.tif (file names); i.e. 6124186/00000001.tif. An intermediate directory is appropriate for multi-volume items. For example: 6124186 (bib MMS ID)/01 (volume number)/00000001.tif (file names). Directory names should not have punctuation or spaces.
- For archival materials described in a finding aid, the directory structure generally follows the finding aid structure. The variation is that the collection code and component identification numbers are separated by an underscore and are used in place of a bib an MMS ID. For example: C0744 (collection code)/c002 (component ID)/00000001.tif (file names) should be organized as C0744/C0744_c002/00000001.tif.
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