In a spatial scene the figure is located by virtue of the axial properties associated with a given reference object. For instance, in a sentence of the following kind: The bike is in front of the house, the bike can be located by virtue of 'searching' for the bike, the figure, in the region in front of the house. However, this process occurs by virtue of the reference object, the house, having a number of 'axial' divisions: front, back and side areas. These areas of the reference object constitute axial properties and are employed in the establishment of a spatial relation. Some reference objects are symmetric and thus fail to manifest intrinsic axial properties. In such situations a secondary reference object is required in order to provide the (primary) reference object with axial properties.