Dr. Joseph Voros of Swinburne University's Strategic Foresight program offers the following gem:
I was sitting here thinking about what to call things written for the purposes of being seen by Google Earth -- graffiti for Google, as it were, when it hit me:
Googleffiti, GOOG-le-FI-ti, n, pictures, words, symbols or glyphs created expressly for the purpose of being seen from space-based imaging devices and visible to anyone through Google Earth.
This is an example:
53 32'19.50"N, 1 20'49.22"W
Note the pronunciation: not Google - ffIti, but GOOG-le-FI-ti.