Unit of measurement for latitude and longitude?

Answer 1

Latitude and longitude are angles, so any unit of angle measure is appropriate.

That could include radians, grads, or degrees, among others.

The geographic coordinates are traditionally and most commonly expressed in

degrees, along with either decimal parts of degrees, or the ancient 'minutes'

and 'seconds' divisions, which are real bears to handle arithmetically.

Answer 2

The lines don't need to be identified.

Latitude and longitude are angles, so it's technically correct to specify them in any

unit of angle measurement, such as radians, grads, degrees, etc.

By far the unit most often used worldwide when exchanging geographic coordinates

is degrees, plus either decimal fractions of a degree, or else the ancient traditional

submultiples of a degree called 'minutes' and 'seconds'.

Answer 3

the degree