Tim Mackey of Geoscience Australia is next, speaking on maps and the impact of the Internet. His organisation has a significant amount of data (some 500 terabytes, growing by 150 TB per year), and aims to make a significant quantity of this material available online. Historically, of course, such spatial data would have been available in hardcopy and updated on a yearly basis, while now it is electronic and Internet-accessible and updated almost daily. Archive and versioning management therefore become crucial issues. Every client of Geoscience Australia, in effect, will receive a different map.