The subdomain which is selected from the Subdomains randomly.
The zoom level for tiles.
The column index of the tile.
The row index of the tile.
{quadkey} The uniquely indentifies a single tile at a particular level of detail. Refer https://msdn.microsoft.com/en-us/library/bb259689.aspx. {cx} >The longitude of the tile center point.
The latitude of the tile center point.
The width (in pixels) of the tile image. Always 256.
{height} The height (in pixels) of the tile image. Always 256.