A significant number of postcodes do not have geographic references in this database. Some of these, mainly the large user postcodes, are non-geographic postcodes, such as box numbers. Many of the other postcodes without geographic references are new postcodes to which the Postcode Reference File has not yet assigned geographic references. Most of these will be assigned appropriate grid references in later releases.
Geographic and non-geographic postcodes are supplied together in one file. Non-geographic postcodes have zero in the co-ordinate fields, and are not assigned a graphic object. Consequently, they are not mappable.
Non-geographic postcodes may be selected by either picking all postcodes with zero co-ordinates, or picking all postcodes without objects. To do this in MapInfo Pro, use Query>SQL Select, and select postcodes where Xcoord = 0. Alternatively, enter ‘not obj’ in the Where Condition box.