Where is Pawnee, Indiana?

Parks and Recreation is awesome. I started watching it on Netflix to the fill the void of time I used at the beginning of this summer watching Arrested Development (probably my third favorite show of all time, after Seinfeld and Frasier). Parks and Recreation is well-cast. Where The Office featured 1-2 main comical characters (Dwight Shrute and Michael Scott), Parks and Recreation has multiple (Tom Haverford, Ron Swanson, Leslie Knoppe, and Andy Dwyer).

So for those who've wondered where is Pawnee? Is it just fictional? There answer is no, the writers at Parks and Recreation have given enough clues to where Pawnee might be in real life: