I wouldn't use, "From a geographer's standpoint..." or "geospatially..." Just tell them you like their route structure. Also, don't make it sound like you want to work there because everywhere else sucks because they might expand into suckville within a year. Also, I would NEVER say "stepping stone." Although they may realize they are a stepping stone, you have to sell them on the fact that you want to be there.

I picked up the book, "Checklist for Success" by Cage and would recommend getting it.

Good luck