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"All roads are covered, except for a few on/off-ramps that weren't very interesting," writes Adam from GTA4.net. "There's around 3,000 separate panoramas which were stitched together from almost 80,000 in-game screenshots (captured with a script) and the final set of tiles consist of over a million images."

The folks who run GTA4.net added an impressive new feature to their interactive GTA IVGoogle Map earlier this month, letting you revisit the boroughs of Liberty City from a Niko's eye view.

Dedicated fans, with the help of Google have put together an extremely detailed map of Grand Theft Auto's entire cities that shows everything from power-ups, pigeons, to easter eggs. 

GTA 4 MAP