Aztec Code

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Encoding: "This is an example Aztec symbol for Wikipedia."
Aztec Code is a 2 dimensional matrix style bar code symbology. Aztec Code was invented by Andrew Longacre, Jr. of Welch Allyn Inc. in 1995 (later Hand Held Products Inc., now Honeywell Imaging and Mobility). The code was published by AIM International in 1997 and although the code is patented, it has been released to the public domain.
Contents
1 Encoding
2 Character set
3 Usage
3.1 Transport
3.2 Governmental
3.3 Mobile phone reader support
4 See also
5 External links
//
Encoding
The symbol is built on a square grid with a bulls-eye pattern at its centre for locating the code. Data is encoded in a series of circles around the bulls-eye pattern. Each additional circle completely surrounds the previous circle causing the symbol to grow in size as more data is encoded. A dark module is a binary 1 and a light module is a binary 0. The code is orientation independent.
The smallest Aztec Code symbol is 15x15 modules square, and the largest is 151x151. The smallest Aztec Code symbol encodes 13 numeric or 12 alphabetic characters. The largest Aztec Code symbol encodes 3832 numeric or 3067 alphabetic characters or 1914 bytes of data. No empty zone is required outside the bounds of the symbol.
The level of Reed鏈lomon error correction[1] is configurable, from 5% to 95% of the data region. The recommended level is 23% of symbol capacity plus codewords.
Aztec Code is supposed to be robust according to various printer technologies. It is also well suited for displays of cell phones and other mobile devices.
Character set
All 8-bit values can be encoded. The default interpretation shall be:
for values 0 - 127, ANSI X3.4 (i.e., ASCII) and
for values 128 - 255, ISO 8859-1: Latin Alphabet No. 1.This corresponds to ECI 000003.
Two non-data characters can be encoded, FNC1 for compatibility with some existing applications and ECI, escape sequence for the standardized encoding of message interpretation information.
Usage
Transport
Land transport
An Aztec code barcode is used by Deutsche Bahn, Trenitalia, and by Swiss Federal Railways for tickets sold online and printed out by customers. An Aztec code barcode is used by Heathrow Express and National Express East Coast delivered to mobile phones and displayed on their screens, and on self print tickets.
The barcode is scanned by a handheld scanner by on-train staff to validate the ticket.
Airlines
The Aztec Code has been selected by the airline industry (IATA's BCBP standard) for the electronic boarding passes.
Several airlines send Aztec Codes to passengers' mobile phones for ticketing purposes, relating to online (or paperless) ticketing.
Air New Zealand will be using the code domestically for ticketing, but this deployment is still in process. [2]
Governmental
Governmental deployments
Polish car registration documents bear an encrypted summary encoded as Aztec Code. Works are underway to enable car insurance companies to automatically fill in the relevant information based on digital photographs of the document as the first step of closing a new insurance contract.
Mobile phone reader support
This code has limited mobile phone reader support. Please feel free to keep and updated list of phones supporting the feature here.
Neoreader adds support for this code to many brands of cellphone
NeoMedia
An Aztec code can be displayed and scanned from the screen of any phone with a high enough screen resolution.
See also
Barcode
Data matrix (computer)
High Capacity Color Barcode
External links
Related websites
2D barcodes at AIM Global

v?d?eBarcodes
Linear Barcodes
Code 39 - Code 93 - Code 128 - Codabar - European Article Number - ITF-14 - MSI Barcode - UPC
Post Office Barcodes (1D)
CPC Binary Barcode - PostBar - POSTNET - RM4SCC (2D Matrix) - MaxiCode - OneCode
2D Barcodes (Stacked)
Codablock-F - PDF417
2D Barcodes (Matrix)
Aztec Code - Datamatrix - QR Code - Semacode
Polar Coordinate Barcodes
MaxiCode - ShotCode
Next Generation
DataGlyphs - High Capacity Color Barcode (Microsoft Tag) - Sony Dynamic Digital Sound
Technological issues
Barcode scanner - Barcode printer
Related topics
Supply Chain Management - RFID
Categories: Barcodes
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