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| Full-Text | Maps | Images | Finding Aids | Census | Chronology | HSWP Catalog | |
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Vendors and Software
The Digital Research Library
(DRL) is pleased to provide the names of vendors contracted for the
Historic Pittsburgh project. The list also includes the names and types of
software implemented for the project. For more information on the workflow
and procedures for the Historic Pittsburgh project, please refer to the
DRL Project Documentation webpage.
Data Creation and ProcessingImagingMost of the page images for the Full-Text Collection have been scanned as 600 dpi Group IV compressed bitonal TIFF images by Northern Micrographics, Inc. (NMI), in La Crosse, Wisconsin. In addition, NMI has created facsimile reprints on acid-free paper to replace brittle and deteriorating original materials. G. M. Hopkins maps for the Maps Collection have been scanned in 24 bit RGB color as 300 dpi uncompressed TIFF images by Chapman Corporation in Washington, Pennsylvania. OCRAutomated batch Optical Character Recognition (OCR) processing has been performed on the images for the full-text collection using Prime Recognition multi-engine OCR software. Minimal corrections have been made by the Digital Research Library staff. Data Searching and PresentationSearch EngineBoth the Full-Text Collections and EAD Finding Aids have been indexed and made searchable by using Open Text pat50, an SGML-aware search engine. The Maps Collection and the Census Schedules are searchable using a MySQL database. Image DisplayMaps are compressed and displayed using MrSID from LizardTech. CGI ScriptsThe University of Pittsburgh is a member of the University of Michigan's Digital Library eXtension Service. This membership has given the University of Pittsburgh access to CGI scripts that act as middleware between the Web-based search forms and the pat50 SGML search engine. Scripts have been modified to meet the particular requirements of the Digital Research Library. Contact Us with feedback and questions. |