Example: Maps typically contain a legend or key, which lists and explains the symbols found on the map. For example, the symbol CG appears on the map. By looking at the legend or key, you can find the symbol CG and see that it means Cattle Grid. Another example of a symbol is a cross with a circle at the bottom. The legend or key shows that this symbol represents a place of worship, such as a church with a spire. The legend or key help to provide detailed information about the map which keeps the map from being cluttered