Graffiti Analysis makes visible the unseen movements of graffiti writers in the creation of a tag. Motion tracking, computer vision technology, and a custom C++ application are used to record and analyze a graffiti writer.s pen movement over time. These gestures are processed to produce algorithmically-generated digital projections that appear in motion on the surfaces of buildings in New York City. Relationships are created between analog and digital graffiti styles, forming a link among traditional graffiti, experimental street art, and new media. Graffiti is re-presented in the language of information analysis, offering a system for greater understanding of a highly coded form of creative expression.