Information About the Digital Image Access Project
Rare Book, Manuscript, and Special Collections Library
Duke University


Project Background

In the spring of 1993 the Duke University Special Collections Library responded to a Request for Proposal issued by the Research Libraries Group for a "Digital Image Access Project" (or DIAP).  This project, which had been organized by RLG's Photograph Preservation Task Force, was designed to "explore issues involved in using digital image access systems to both manage and improve access to photograph collections."

The specific objectives of the project were threefold:

Responding institutions were asked to propose approximately 1000 photographs from their collections focused on the broad theme of "The Urban Landscape," which would be digitized by Stokes Imaging Service (now JJT, Inc.) of Austin, Texas.  Participants would work with each other and with staff at Stokes to develop common data elements and a software system to describe, store, retrieve, and display the digital images.

Institutions selected for participation in this project included:

The DIAP project provided a useful platform for exploring the issues and objectives, although the stand-alone database ("Visual Photologue") developed by Stokes was quickly overtaken by the emergence of the World Wide Web in the middle of the project.  A companion project, the Technical Images Test Project, using the resources of RLG, Stokes Imaging, and the Image Permanence Institute of the Rochester Institute of Technology, focused on an investigation of image quality in digital conversion.  A full report and proceedings from a symposium focused on both of the projects (RLG Digital Image Access Project; Proceedings from an RLG Symposium held March 31 and April 1, 1995, Palo Alto, California, edited by Patricia A. McClung) can be obtained from RLG.


Duke University Special Collections Library and DIAP

The Special Collections Library contributed 1000 photographs from various collections for the RLG Digital Image Access Project.  Focusing on the "Urban Landscape" theme, items were selected from fourteen separate collections in seven general subject groups.  These groups included:

These images, along with associated descriptions, access points, and administrative information have been encoded into an image database, following the structural and content standards of Encoded Archival Description (EAD), a Standard Generalized Markup Language (SGML)-compliant standard for archival finding aids.  This standard, which is jointly maintained by the Society of American Archivists and the Library of Congress allows for detailed content and structural markup of archival finding aids, inventories, and registers.  This markup facilitates detailed searching and retrieval of information within these finding aids in an electronic environment.

The Special Collections Library's implementation of EAD is maintained via DynaText and DynaWeb software, which the Library acquired through a special educational grant program from Inso Corporation.  All of the Library's encoded finding aids are located at the Digital Scriptorium's DynaWeb Internet Server.  This server (which is still under development) and the software which supports it allows for detailed searching of all the DIAP image collections.  Searches may be made across all collections, limited to only DIAP collections, or limited on the basis of any of the structured information in the descriptions (e.g., main entry/creator, title, subject access terms, captions, etc.).  In addition, all collection descriptions (or any specified subset thereof) may be searched through an open free text search.  For further instructions on searching, see Dynaweb Searching.


Technical Information

The DIAP images were created by Stokes Imaging Service (now JJT, Inc.) of Austin, Texas. The images presented here are 72dpi JPEGs. Thumbnails were created at the Special Collections Library's Digital Scriptorium using ImageMagick for UNIX.


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