1DEG

1deg commonly denotes one degree, a unit of angular measure equal to 1/360 of a full circle. The standard symbol for a degree is the degree sign (°); in plain text, 1deg (or 1.0 deg) is sometimes used in data formats or programming contexts where the degree symbol is unavailable.

A full circle contains 360 degrees. Each degree is subdivided into 60 arcminutes, and each arcminute into 60 arcseconds. In radians, 1 degree equals π/180 radians (about 0.0174533 rad).

Degrees are widely used to express geographic coordinates (latitude and longitude), celestial coordinates in astronomy, and in many engineering and navigation calculations. They can be written as decimal degrees, for example 37.7749°, or as degrees, minutes, and seconds (37° 46' 29").

Historical notes: the degree is a long-standing unit dating back to ancient geometry and astronomy. The division of the circle into 360 parts is a conventional choice that has persisted in mathematics, cartography, and timekeeping. The sexagesimal base (60) underlying degrees and minutes derives from ancient measurement systems and remains a defining feature of how degrees are expressed.

In computing and data exchange, 1deg may appear as a numeric angle value in degrees; some formatting conventions permit the degree symbol, while others rely on a textual suffix or separate unit field. See also degrees, radians, arcminute, arcsecond, and degree symbol.