The Map

The Space Invaders maps (one for each invaded city) can be bought from the artist's site, here:

 

www.space-invaders.com/som.html

 

There is a low-res version of the Manchester map here:

 

www.space-invaders.com/map_manchester.html

 

It doesn't include all the invaders (we found some that are off the bottom of the map) and some seem to be in slightly different positions, but that just makes it more fun.

 

Done