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 andmagnetic 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 {{cartography-stub