Boundary Maps could also be called Reference Maps. They include a variety of map types that show boundaries and names of geographic areas within the State of Michigan.
This site offers a collection of various boundary maps which depict legislative districts, parcels, and other regions of importance in State Government.
Plat Maps
General Land Office PlatsGeneral Land Office (GLO) plat maps are derived from original surveyor notes of the State of Michigan. The survey was conducted in the early to mid 1800's