MarkerMap is a specific postcode point product based on the full Ordnance Survey Code-Point data set. The information is made up of digital vector data and consists of separate points (MarkerMap Points) for over 1.7 million unit postcodes (e.g. SW1A 0AA) in the United Kingdom (UK). The polygon regions (MarkerMap Regions) are the result of tessellating these points. Higher-order boundaries (Area, District and Sector level) are aggregated using the postal hierarchy.
Download the MarkerMap (PGA) metadata and User Guide for more information.
The Intra-governmental Group on Geographic Information (IGGI) website contains full PGA information and administration.