The map will be advertised in the press and on the Tube network
A map of London imposed on to planet Earth will be used to promote the city in the run-up to the 2012 Olympics.
An image of the River Thames snaking around the world will be used to tempt tourists as London becomes the official Games host city on 24 August.
British tourism chiefs hope that the advert, which features the slogan "See the World, Visit London", will help increase the city's revenue by £2.2bn.
It is part of a £4m global advertising campaign which begins this week.
The map will advertised in the press and on the Tube network.
Internationally, the advert will feature online and outdoors in places including North and South America, Europe, Australasia, China, India and Russia.
A film will also run online and be broadcast on live screens in London that have been set up for the Olympic handover from Beijing.
Visit London chief executive James Bidwell said the campaign celebrates "a historic moment for our capital, the Olympic handover".
He said: "From August 24, the Olympic spotlight will be on our capital.
"London already welcomes more overseas tourists than any other city in the world and our goal is to maintain that momentum in the lead up to and beyond the London 2012 Games."
London mayor Boris Johnson said: "London is a global leader in the arts, culture and creative industries and this campaign urges tourists to come and experience our world-city for themselves."