A map legend or key is a visual explanation of the symbols used on the map. It typically includes a sample of each symbol (point, line, or area), and a short description of what the symbol means. For example, a short segment of a blue sinuous line may be labeled 'rivers'.
What is a key of a map?
Definition: A key or legend is a list of symbols that appear on the map. For example, a church on the map may appear as a cross, a cross attached to a circle, a cross attached to a square. ... Symbols and colours can also represent different things like roads, rivers and land height.
What is the purpose of a legend or key?
The purpose of the legend or key is to give you the information you need to interpret the symbols on the map correctly.