Aztec Code

Used in document imaging, railway ticket validation, and some postal applications.

A 2D matrix symbology built on a square grid with a square "bull's-eye" pattern at the center. Aztec Code can encode up to 3,832 numeric or 3,067 alphabetical characters, or 1,914 bytes of data.

The level of Reed-Solomon error correction used with Aztec Code is configurable, from 5% to 95% of the total data region. The recommended error correction level is 23% of symbol capacity plus codewords.