This new multimedia edition of Domesday was compiled between 1984 and 1986 and published in 1986. It included a new "survey" of the United Kingdom, in which people, mostly school children, wrote about geography, history or social issues in their local area or just about their daily lives. Children from as few as 9,000 or as many as 13,000 schools were involved. This was linked with maps, and many colour photos, statistical data, video and "virtual walks". Over 1 million people participated in the project. The project also incorporated professionally prepared video footage, virtual reality tours of major landmarks and other prepared datasets such as the 1981 census.