Anybody have practical experience printing map images at 1" battlemap scale? How about at a DYI copy/print shop?

I'd like to start with something like this Against the Giants map:
http://archive.wizards.com/dnd/image...2_ppi_4yj4.jpg

And print it on smaller sheets that I can then tape together into a big map. But since the copy shop is going to charge me for each color print, I don't want to experiment endlessly once I'm there.

Any advice?