Specifies the number of logical pixels (not points) that the returned tile images will prefer to display as. iOS only.
Defaults to 256, which is the traditional size of Google Maps tiles. As an example, an application developer may wish to provide retina tiles (512 pixel edge length) on retina devices, to keep the same number of tiles per view as the default value of 256 would give on a non-retina device.
final int tileSize;