First thing this is not a conventional drawing. This is one is created using the GPS (Global Positioning System) and a Nokia N82.  So using these Stavros created the biggest art in the world. He call this as the position art. You can find the art work here in the website

http://www.theworldismycanvas.com/

Here is another claim which later diclared aas a Hoax and now he also put the same in this website, saying that was fictional

Check that also here

Read more about the Hoax Here

Ref: Fresh Creations