Unless you're reading this from Australia, Indonesia or South America's Southern Cone ... at the graphs below of world population by longitude and latitude, also by Rankin, the reason for ...

Save guides, add subjects and pick up where you left off with your BBC account. We use imaginary lines to help locate where a place is in the world. the Arctic Circle (the North Pole) the ...

Maps and navigation ... One set - called latitude and longitude - allows us to pinpoint exactly where we are anywhere in the world. Latitude indicates how far north or south you are.