Digital Earth is the name given to a concept by former US vice president Al Gore in 1998, describing a virtual representation of the Earth that is spatially referenced and interconnected with the world’s digital knowledge archives.

In a speech prepared for the California Science Center in Los Angeles on January 31, 1998, Gore described a digital future where schoolchildren - indeed all the world's citizens - could interact with a computer-generated three-dimensional spinning virtual globe and access vast amounts of scientific and cultural information to help them understand the Earth and its human activities. The greater part of this knowledge store would be free to all via the Internet, however a commercial marketplace of related products and services was envisioned to co-exist, in part in order to support the expensive infrastructure such a system would require.

Clearly, many aspects of this vision have been realized, evidenced in part by the popularity of virtual globe geo-browsers such as Google Earth and Microsoft's Bing Maps 3D for commercial, social and scientific applications. But the Gore speech outlined a truly global, collaborative linking of systems that has yet to happen. That vision has been continually interpreted and defined by the growing global community of interest described below. As technological advances have made the unlikely possible, the vision has evolved and become more concrete, and as we better understand the interdependence of the environment and social activity, there is greater recognition of the need for such a system. Digital Earth has come to stand for the large and growing set of web-based geographic computing systems worldwide. These are both useful and promising, but do not yet constitute the envisioned "global commons."

Maurice Donald Williamson (born 6 March 1951) is a New Zealand politician, representing Pakuranga in the House of Representatives as a member of the National Party. He holds several ministerial portfolios outside the Cabinet: Building and Construction, Customs, Statistics and Land Information .

Williamson was born in Auckland but spent nearly all his school years in Matamata. After graduating with qualifications in computer science and applied mathematics from the University of Auckland, he worked for twelve years developing airline planning software for mainframe computers.

Williamson is married to Raewyn and has three children. He is an Honorary Fellow of the New Zealand Computer Society (HFNZCS).

Williamson is a member of Parliament for the National Party, a centre-right political Party in New Zealand, and has been MP for Pakuranga since the 1987 elections. He has held a number of ministerial posts, including Minister of Communications, Minister of Broadcasting, Minister of Transport, and Minister Research, Science and Technology, and associate Minister of Health (1990-6). He was a strong supporter of reform of prostitution law.