Maryland Courts and Judicial Proceedings Section 10-908

      (a)      If a plat is authenticated, it may be considered as evidence.

      (b)      In an action of trespass quare clausum fregit involving the location of minerals underground, if the location cannot be measured on plats because of earth falls or other reasons, the trespass may be proved by other evidence.

      (c)      A plat or certificate of survey may be amended at bar where the location does not correspond with the variation. In the sound discretion of the court, objects may be placed on a plat by a witness who was not sworn on the survey.