Created by renowned Dutch cartographer Joan Blaeu, the unique map was thought to have been lost forever.
Archipelagus Orientalis (Eastern Archipelago), as it was called, was unearthed in 2010 in storage in Sweden after 350 years.
It has gone on show at Australia's National Library, its permanent home.
It is believed that the treasure was buried away when a 1950s antique bookseller who owned a stockpile of books and maps went out of business.
The owners, whose identity is unknown, only realised the rarity of the map when it was sold at auction.
