The blue line on a map typically represents a body of water, such as a river, stream, or coastline. In topographic maps, these blue lines indicate the flow of water and can also denote the boundaries of lakes and other water features. The specific meaning can vary depending on the type of map being used.
A stream,river or another body of water.
A wavy blue line on a map usually represents a river or a water body. It indicates the presence of water in that area.
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.
A blue line. It will also be annotated (in blue) "canal" or given a name eg. Shropshire Union Canal.
It is called the scale.
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!
a blue line on a map means that it is water weather it is a stream river or lake
an equator line
A wavy blue line on a map usually indicates water. I could indicate a river, canal, or any type of waterway.
I am guessing that's a river.
equeater
the blue line represents Lakes, Streams , canal and mainly just water
The horizon
A stream,river or another body of water.
its called an index or index conotour line and is every fitth line on a topographic map.