The Mapping Science Committee, in cooperation with the Federal Geographic Data Committee, convened a workshop in April 1996 to examine societal and technological changes that might occur within the next 15 years. The purpose was to consider within the context of spatial data activities a series of long-term visions and to identify societal forces and changes that would make those visions more or less likely. The workshop provided a framework for thinking about the future of U.S. spatial data activities.