Spatial Data Transfer Standard

The Spatial Data Transfer Standard (SDTS) is a way of transferring earth-referenced spatial data between dissimilar computer systems with the potential for no information loss.

The site features SDTS standards documentation, user guides in PDF format, workshop and conference reports and training materials, as well as links to available public domain software. Visitors can also avail of event announcements and a news archive.
http://mcmcweb.er.usgs.gov/sdts/