a blue line on a map means that it is water weather it is a stream river or lake
equeater
The horizon
it means water
a river
it means water
A blue line represents a river on a map so you know it is a river,a lake, or the sea
A stream,river or another body of water.
The symbol for a creek on a map is typically a blue line with lines intersecting it at right angles indicating the direction of flow. It is often labeled with the word "Creek" or a thin blue line with arrows showing the flow direction.
Usually represent a stream, river, or other body's of water.
On a weather map, the symbol for a cold front is a blue line with blue triangles facing the direction that the front is moving.
A blue line on a map is a lake ,river , or body of water
Water represents a blue line on a map.