Graffiti

Writings on the Wall: Before graffiti became a global language
PBS Article

Photos from Write of Passage

Unofficial Language
A Semiotic and Visual Exploration of Graffiti and Public Space in Vancouver

In Istanbul: The "Language Of The Wall," Street Art, and Graffiti

Graffiti as International Language

Graffiti Mapping by Illusion Research Lab


Graffiti is spray painted on a wall and then augmented by video projection

Urban Projection
http://www.urban-projection.com/

Light Brix

Tony Quan & EyeWriter


A paralyzed graffiti artist is able to continue his art through technology. A sensor detects the movements of his pupils which act as his drawing implement. His artworks are created digitally and projected on buildings.

Legality
Laws regarding graffiti in Austin, Texas