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.
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.
The blue line on a map usually represents a stream of water!