OS maps show physical and human features as symbols. This makes the maps easier to read. Each OS map has a key to show what the symbols mean. Large-scale maps - 1:1,250, 1:2,500 and 1:10,000.

Here are some examples of erosion features identifiable on a map. The shape of the coast is also a good indicator. In this extract the large headlands at Burgh Island, 646438 and Bolt Tail ...

Ordnance Survey datasets covering roads, rivers, boundary lines and other themes are now available on Snowflake Marketplace.