Introducing the New Digital Map of the United Kingdom: OS Master Map

The Ordnance Survey has developed a new digital map of the UK, detailing every building and field, down to railway signals and post boxes. The OS Master Map contains 400 million data points, each with a unique reference number for easy location. Users can search for specific data areas like houses and roads. The map is accessible in various formats, with regular updates online. With over 200 years of mapping experience, Ordnance Survey offers both paper and digital formats.

What is the significance of the unique 16 digit reference number in the OS Master Map?

How long has the Ordnance Survey been involved in mapping?