The NE and Midwest comprise a definite ‘za corridor.
California is, like, so over pizza. Or maybe authentic pizza joints never really made it out there.
The person who reported this on Boing Boing, his name rhymes with pizza.
Click through to Boing Boing and then to the link for the Google project, which also maps other kinds of eateries. I think it’s interesting that Sandwich Shops are really, really concentrated in eastern Pennsylvania (where I live) and New Jersey. We love our hoagies and grinders. (Navy beans, navy beans).