Interpretations of the Zoning Map. Where the street or lot layout actually on the ground, or as recorded, differs from the street and lot lines as shown on the Zoning Map, the Board, after notice to the owners of the property and after public hearing, shall interpret the map in such a way as to carry out the intent and purpose of this chapter, and shall make findings on all relevant issues of fact, which shall become part of the record on appeal to court. In case of any question as to the location of any boundary line between zoning districts, a request for interpretation of the Zoning Map may be made to the Board, who, after a public hearing, shall decide all questions of interpretation and shall make findings on all relevant issues of fact, which shall become part of the record on appeal to Court.