I see the point especially with foreign addresses. It can be bit of a challenge to communicate addresses like "Nándorfejérvári út 4" or "Kısıklı Büyük Çamlıca Cd. No:9" over the phone. Coordinates are of course alternative, but for most of us, few words and number are easier to keep in mind for few minutes.

The given notation is hard to decode inside the head, but if you can memorize it for 30 seconds then you can fire up an app to do the decoding.

Pictogram is clever idea for the checksum. Probably something that sticks to your head. Reminds me of the Lotus Notes login dialog [1], [2]

[1] https://blog.codinghorror.com/the-dramatic-password-reveal/ [2] http://www.tenable.com/pvs-plugins/1305