The ideal geographic coverage of distributed servers is strongly influenced by the actual network path taken by each connection.
When dealing with overseas network connections, the path is determined by the placement of the submarine network cables that carry international traffic.
telegeoraphy.com publishes a wide variety of maps and information detailing submarine cables and international network traffic capacity. The downloads on this site are provided for convenience only in coverage planning decisions. Please refer to telegeoraphy.com for current versions or to purchase hard copy versions suitable for wall mounting.
A very large 7MB jpeg version is available from telegeoraphy.com