From the University of Texas Libraries:
The University of Texas Libraries are leveraging technological advances in geographic information systems (GIS) to enhance the value of map collections at The University of Texas at Austin with the launch of a new portal that is designed to facilitate discovery of geospatial datasets that are ready to use in GIS software for mapmaking and analysis.
The Texas GeoData Portal uses an open source geospatial discovery application – GeoBlacklight – to power a web portal that gives users the ability to search, browse, preview and download geospatial datasets.
[Our emphasis] Visitors to the portal can search through over 30,000 publicly available geospatial datasets, including georeferenced scanned map images from the Perry-Castañeda Library Maps Collection and unique vector datasets developed from items in other special collections like the Benson Latin American Collection and Alexander Architectural Archives.
Read the Complete Launch Announcement