Security and Layers

In Normal mode the user may select any percentage of the symbol to contain error checking data within the range 1 – 99%. This is the Level parameter in calls to the AZTDF.DLL functions. If a value of 0 is used then the symbol will actually be produced with the default amount of error correction (which is 23% + 3 codewords). The higher the security level the greater will be the number of layers required to contain the symbol – and hence its overall size.

In Compact mode the user specifies the number of layers used to contain the symbols information – and this is restricted to the range 1 – 4. The DLL will insert error correction data in the space available.

In Full range mode again the user specifies the number of layers allowed for the symbol, but this time the range is 1 – 32. Again error correction data is used to fill otherwise unused space in the specified number of layers.

In Full range mode the maximum capacity of Aztec Code symbols is approximately as follows:

Digits only – maximum capacity 3800 digits
Alphanumeric text – maximum capacity 3000 characters*
Byte values – maximum capacity 1900 bytes

(*Note that capital letters, punctuation and new lines/paragraphs reduce this value.)

Runes are special Aztec symbols that consist of a single layer and have no security options.

Appended symbols are not supported at this time.

 

More:

The Aztec font