Britain has been mapped for centuries. The Ordnance Survey now maps the whole country. A map is a piece of paper with important features drawn on to it using symbols that we can all understand.
Maps are now updated more easily by using 'pictures' taken of the ground by satellites. But the pictures can also be used as they stand and if they are put together, they can cover the world. This is what Google Earth does, and using it not only allows you to see where you are, but to understand maps, too.
