
In general, an imaginary line is usually any sort of
geometric line that has only an
abstract
Abstract may refer to:
* ''Abstract'' (album), 1962 album by Joe Harriott
* Abstract of title a summary of the documents affecting title to parcel of land
* Abstract (law), a summary of a legal document
* Abstract (summary), in academic publishi ...
definition and does not physically exist. In fact, they are used to properly identify places on a
map.
Some outside geography do exist, such as the
Mendoza Line, which in
baseball divides below-average hitters and extremely poor hitters. A ''centerline'' is a
nautical term for a line down the center of a vessel lengthwise.
Examples
Geography
As a
geographical concept, an imaginary line may serve as an arbitrary division, such as
*
Antarctic Circle,
*
Arctic Circle
The Arctic Circle is one of the two polar circles, and the most northerly of the five major circles of latitude as shown on maps of Earth. Its southern equivalent is the Antarctic Circle.
The Arctic Circle marks the southernmost latitude at w ...
,
*
Border,
*
International Date Line
The International Date Line (IDL) is an internationally accepted demarcation on the surface of Earth, running between the South and North Poles and serving as the boundary between one calendar day and the next. It passes through the Pacific O ...
,
*
Latitude, including the
Equator
The equator is a circle of latitude, about in circumference, that divides Earth into the Northern and Southern hemispheres. It is an imaginary line located at 0 degrees latitude, halfway between the North and South poles. The term can als ...
,
*
Longitude, the
prime meridian, the
Tropic of Capricorn and the
Tropic of Cancer.
Any axis about which an object spins is an imaginary line.
*
Mason–Dixon line, which informally marks pieces of the borders of four
U.S. states:
Delaware,
Maryland,
Pennsylvania, and
West Virginia, once part of
Virginia. Symbolically, the line separates the
American North from the
American South
The Southern United States (sometimes Dixie, also referred to as the Southern States, the American South, the Southland, or simply the South) is a geographic and cultural region of the United States of America. It is between the Atlantic Ocean ...
,
*
Missouri Compromise Line,
*
Time zones.
Science and engineering
*
Line of sight
*
Optical ray
*
Force lines in
mechanical and
structural engineering
*
Field lines for
electric and
magnetic field
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to ...
s
See also
*
Imaginary line (mathematics)
References
External links and references
One link
Geography terminology
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