The only question that remains really, is whether or not the cooridinates on the Flash map are in fact from the game, or just something the web design team at Rockstar threw in for fun. Judging by the width of the streets on the maps, it would appear the coord's are correct. For if the numbers were something collectively pulled out of thin air by the web team, the chances of them scaling this closely would be quite negligible. Mind you, this map comparison has not been confirmed by Rockstar, and is only based on my knowleged earned from years of experience modding the GTA series.