Does a blue line on map stand for river?

Typically, a blue line on a map represents a river or other water body, such as a stream, creek, or canal. Blue lines are commonly used to depict the flow of water and to highlight the geographic features of a region. Rivers, as significant natural waterways, are often represented using blue lines to provide a clear visual reference for navigation and geographical orientation. However, it's essential to keep in mind that map symbols can vary, so it's always a good practice to check the map's legend or key to confirm the precise meanings of symbols and colors used.