The Grand Theft Auto community has implemented full Street View on their map of Liberty City with the help of Google Maps API.
The Grand Theft Auto community, and especially GTA4.net, have been hard at work in building an advanced map of the fictional Liberty City since 2008. As a city meant to mirror current-day New York City, Liberty City is an expansive and complex landscape -- and certain extras that most Google Maps users don't particularly care about, such as weapons and armor, must also be covered.
The Street View feature, which allows users to navigate sweeping panoramic views of real world cities, has been implemented in full for GTA's Liberty City. More than 3,000 total panoramas were implemented to create this feature, and more than 80,000 total screenshots and a million total images were required in the construction of those panoramas. The GTA4.net community used a script to capture all the snapshots.
The Street View navigation of Liberty City is just one more feature to be added to an expansive map that includes labels for important "hot spots" like missions, stunt ramps, weapons, ammo, armor, hidden packages, easter eggs, and -- of course -- strip clubs.