It is the biggest shakeup in the Ordnance Survey's 260-year history: from tomorrow you can download maps as detailed as 1:10,000 scale, or collect a list of locations appearing on maps at the 1:50,000 ...

All of these features should be included on a map. These features are essential for understanding and using the map correctly. Maps are divided into a series of squares known as a grid. These grids ...