What is the type of art called where a bunch of RP supporters make up a pic of RP?

[r3v07ution]

Was wondering about doing this type of picture for an off topic project and need some info on it.

 

[A Ron Paul Rebel]

edit: yes, mosaic

 

[robertwerden]

Mosaic

 

[ronpaulhawaii]

You mean photomosaic?

http://en.wikipedia.org/wiki/Photomosaic