0 and 1 look like I and O, B looks like 8, and so on. They picked characters that can't be easily confused. The letters are also chosen so they won't spell mean

0 and 1 look like I and O, B looks like 8, and so on. They picked characters that can't be easily confused. The letters are also chosen so they won't spell meaningful words. The relevant section of the definition is short, and an interesting read: https://github.com/google/open-location-code/blob/master/docs/olc_definition.adoc#open-location-code https://github.com/google/open-location-code/blob/master/doc...