"HERE BE DRAGONS: THE UNSTABLE LANDSCAPES OF GPS" by Will Gowland:

Will, in our Department of Landscape Glitches has jammed the GPS networks and revealed an alternative virtual topography, a territorial architecture of spoofed cartography. It is an emerging landscape that operates and exits in two parallel worlds, the physical and the virtual. Imaginary protest icebergs drift through the autonomously navigated oil shipping lanes. We get lost in a wilderness of illegal signal jamming formations and we glimpse the faint flicker of covert militarised GPS territories, super stable under a secret sky of black satellites.