Mich. Comp. Laws § 560.126: Survey accuracy.

Sec. 126.

The survey of all subdivisions shall be performed by a surveyor.

The relative error of closure of the surveyed land shall be less than the ratio of 1 part in 5,000.

Bearings shall be expressed in relation to the true meridian, or a previously established meridian or bearing and a statement by the surveyor on the plat stating the source of information in obtaining the bearings outlined.