Any person aggrieved by an objection to a plat or a failure
to approve a plat may appeal therefrom, as provided in §§ 236.13(5)
and 62.23(7)(e)10 to 15, Wis. Stats., within 30 days of notification
of the rejection of the plat. Where failure to approve is based on
an unsatisfied objection, the agency making the objection shall be
made a party to the action. The court shall direct that the plat be
approved if it finds that the action of the approving or objecting
agency is arbitrary, unreasonable or discriminatory.