The preliminary plat of a subdivision is not intended to serve as a record plan. Its purpose is to show on a map all facts needed to enable the commission to determine whether the proposed layout of the land in question is satisfactory from the standpoint of the public interest. The subdivider, owner, or representative may call at the office of the commission in advance of the preliminary plat in order to discuss the proposed subdivision and in order to obtain information as to the requirements necessary for the approval of the plat. (2000 Code § 176.11)