The regular rectangular look of vast portions of the north american interior is the result of

It is a result of the township-and-range survey system. It is also referred to as rectangular survey system. It has been established in order to set boundaries for land parcels which is usually 24 miles square in area. This system of rectangles can specify and locate a land with meridians from north to south and baselines from east to west. 

Ansradar; im guessing here; good luck : )

D. coal i hope that