More than 200 data sets detailing life in London are to be put online by the capital's governing body. 4iP, Channel 4's Innovation for the Public Fund, said it would back the best ideas with a £200,000 cash pot.
Boris Johnson, London Mayor, said releasing the data would make the GLA more open and accountable.
"I firmly believe that access to information should not just be the preserve of institutions and a limited elite," said Mr Johnson in a statement.
"Data belongs to the people - particularly that held by the public sector - and getting hold of it should not involve a complex routine of jumping through a series of ever decreasing hoops," he said.
