In Spook Country William Gibson wrote about a form of art that you could only see if you went online at a specific GPS location. I don’t know of anyone who has actually done that, and I suspect that Gibson may just have extrapolated a little from the concept of geocaching. However, it turns out that there are actually people who use GPS systems to make art. Details here.

(And as I have to attend an event in the Presidio in April I’m pleased to see so many cabs there because I’m going to need one to get back to BART afterwards.)