@abc.abstractmethod<EOL><INDENT>def ccoordinates_to_strings(self, coordinates):<DEDENT>
return<EOL>
Gets a string representation of a list of coordinates.

        :param coordinates: a list of coordinates
        :type coordinates: ``osid.mapping.CoordinateList``
        :return: the display strings
        :rtype: ``string``
        :raise: ``InvalidArgument`` -- ``coodrinate.has_record_type(get_coordinate_record_type()`` ) is ``false``
        :raise: ``NullArgument`` -- ``coordinates`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

        *compliance: mandatory -- This method must be implemented.*