Here is a map application that illustrates very well the different tile schemes used (TMS, QuadTree, Google Maps):
http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/
Here is a map application that illustrates very well the different tile schemes used (TMS, QuadTree, Google Maps):
http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/