Equatorial coordinate

A coordinate system with its origin the observer's location on the spheroid representing the Earth, and with its other defining axes and planes parallel to those of an equatorial ...

coordinate

Software; Operating systems

Each of a set of references that together describe the exact position of something with respect to a set of axes (or a row and column).

coordinate

Mathematics; Calculus

A number or a set of numbers that is used to show the position of a point. One coordinate is needed if the point is on a line.

coordinate

Psychology; Behavior analysis

The value of a point plotted on a graph. In a two-dimensional system, the value plotted along the x-axis is called the abscissa and that plotted along the y-axis is called the ...

subtropical

Earth science; Mapping science

Relating to the warmest region of the Temperate Zones that border on the Torrid Zone.

sky

Earth science; Mapping science

The region above and beyond the Earth, as it is seen looking up from the ground. Sky looks blue during the day and dark at night.

South Pole

Earth science; Mapping science

The most southern point of the Earth. The South Pole is the southern end of the axis on which the Earth rotates.

prime meridian

Earth science; Mapping science

The line of longitude that passes through the town of Greenwich, England, and that measures 0 degree. It is the line from which other longitude lines are measured.

planet

Earth science; Mapping science

A celestial body revolving around a sun in a nearly circular orbit. This definition excludes comets, which have highly elliptical orbits. However, it may also exclude some of ...

area of error

Earth science; Mapping science

A figure within which the true location of a point whose location has been determined by measurement is believed to lie, with stated degree of probability.