Baltimore artist Michael Wallace has come up with a way to turn his city into a sort of giant Etch-a-Sketch for his electronic drawings. Wallace, who uses the nickname WallyGPX, rides around on a bike equipped with a GPS tracker and mapping software, drawing on the computerized map with his movements. He uses the grid structure of city streets in southeast Baltimore, and rides through a large local park to create curved lines.
Wallace's work varies from an intricate picture of the Titanic, which commemorated the 100th anniversary of the ocean liner's sinking, to a giant map-portrait of Omar, a character from the Baltimore-based TV series "The Wire." He's also done simpler stuff, such as a scene from the game "Angry Birds" [source: Jauregui].