Symbolic illustration of a photoTAN code (random data) with orientation marks typical for 25 x 25 dot photoTAN codes:
Delimited blue dots at: 3 corners + 1 dot in upper left corner (shifted) + 1 dot in middle + 4 at border (forming cross with dot in the middle)

original by: wikimedia-commons user Gfis (Dr. Georg Fischer), http://commons.wikimedia.org/wiki/File:PhotoTAN.svg, Creative Commons 3.0 by-sa, edited by wikimedia-commons user Calypso10
File:PhotoTAN.svg
http://commons.wikimedia.org/wiki/User:Gfis (Dr. Georg Fischer), edited by Calypso10 http://commons.wikimedia.org/wiki/User:Calypso10