I created this neat Java applet where you click around anywhere as many times you want then click "calculate". After its done thinking, it will find the pixel closest to all of the places you clicked.
I can't really explain it well so please view my applet
http://braintyrant.googlepages.com/java
What do you think of it? I'm a new developer so please critique.
I put a map of italy on the background and clicked every city except rome then clicked calculate. And then the closest pixel was very close to rome.