Caption: "Map of the world where red represents countries which do NOT use the Metric System."
Notice who the holdouts are: Burma, Liberia, the USA, and Alaska---which seems to be an independent country dangling off the northwest corner of North America---but maybe it's just an enclave.
Credit/Permission:
User:Donovaly,
2006 /
Public domain.
Image link: Wikipedia:
File:Metric system.png.
Local file: local link: metric_world.html.
File: Unit file:
metric_world.html.