Source & Credits: DuPz0r on GTA Forums.
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Most recent version of the GTA VI Mapping Project map:
v0.029
Trailer 1 has been revealed. Lots of work to be done!
Completely overhauled the Venetian Islands to match new evidence.
Expanded roads on Vice Beach area based on new evidence.
Added a lot of new buildings in the Vice City area.
Tagged many of the buildings with real-world counterparts (Will come up with a way to distinguish in game names from real ones soon).
Added a Canal between the Vice Beach and Bayshore Landmasses, based on new evidence.
Overhauled Brickell based on new evidence, including the Brickell key.
tweaked the position of several buildings in the Crosstown/Bay area.
Added Dinner Key and reworked surrounding building positions based on new evidence.
Adjusted the Venetian islands slightly, based on new evidence.
These new building locations had a knock-on effect on the positions of the opening trailer prison scene. So the prison, lake, and power station, have all moved based on new evidence.
Added several new green markers/blips for trailer camera positions including timestamp tags to make things clear for everyone.
Added VCIA terminal based on new positional evidence.
Changed some speculative roads/metros/railway paths to better fit the new evidence.
Added a speculative merge of the opening scene and the Jason speedboat leaked clip areas.