The City of Melbourne has created a new online wiki to allow Melbournians to discuss the city's 2020 vision, including plans for city-wide wireless Internet, GPS traffic monitoring and a 3D Facebook.

The wiki has been designed over the last 12 months to promote discussion over the city's ambitious Future Melbourne goals to be carbon-neutral, offer the world's best higher education and research, and reduce water consumption by 40 percent.

Melbourne Lord Mayor John So said the government is the first to use a wiki for public consultation.

"We are the first local government in Australia to use this highly interactive consultation tool in this way," he said.

"The wiki is a new approach to public consultation and we encourage the public to participate in shaping the future of the city. Future Melbourne is the most ambitious and broad-ranging strategy ever produced by Council."

The government invited the community to discuss existing problems and propose initiatives for sustainability.

Co-founder of the Future Melbourne wiki, Doctor Mark Elliott, said the wiki is the first step for government to move away from planning based on fixed-documents.

"There is the opportunity for council to move beyond the plan as a fixed document, to maintaining Future Melbourne as an up-to-date and interactive information hub," Dr Elliot said.

"This hub will continue to document the current status of the plan [by] encompassing the issues, ideas and initiatives shaping the future of the city, as well as connecting those who participate."