[tjbiddle]

I expect very simply! Looks like you could add locations anywhere in the world to the 'NYC' map should you really want. It'd be up to OP to split that up into different cities.

Personally, I feel just having it be global and allowing people to zoom in is best.

[asimova]

for sure, technically you can click the zoom out button on top right of the map to view the entire map. I'll let people to create their own maps in the future if there's enough interest.