Geoplan postcode maps are the best of their kind on the market. They are based on Ordnance Survey mapping & the postcode information is continually updated from official Royal Mail sources. The maps can be used for a wide range of sales & marketing applications, including sales territory creation, promotional & distribution planning & market research analysis. The maps are grey & white with the postcode information clearly marked on top in red. Postcode districts are denoted by the first half of the postcode; e.g. TN11, SW9 or BN22.