Wis. Stat. § 24.06: Plat of lands.

The board may subdivide any parcel of public lands into smaller parcels or village lots, with streets and alleys if necessary, whenever it believes a larger net price can be obtained by selling the land in smaller parcels or lots. A survey and plat of the subdivision, verified by its maker as true and correct, shall be returned and recorded in the office of the board, and the parcels or lots designated on the survey and plat shall be appraised before the parcels or lots are offered for sale. The subdivision shall be ordered, the proceedings for the subdivision governed, and the appraisal made in substantial compliance with s. 24.08.