Ordnance Survey – Great Britain's national mapping agency
![Ordnance Survey home page [logo]](/images/gui/logo-os.gif){kind=logo}
National Grid references are a compact way of stating the easting and northing coordinates of any point in Great Britain. The following pages give details on how the National Grid is devised and also explain how to give the National Grid reference for any location. The National Grid is used on all Ordnance Survey maps.
The National Grid is the map reference system used on all OS mapping to record the position of any feature. By giving a National Grid reference, you can pinpoint any location in Great Britain. The National Grid covers the whole of Great Britain and is designed to be as easy to use as possible.
Find out more details on the National Grid. >>>
Go to a short interactive guide on National Grid references. >>>