Geodesy types and primitives
The implementation can accurately store either decimal fractions of the degree (with the 10-6 degrees precision) or degree, minute, second (with the 10-2 arcsecond precision).
High-precision (10-7 degrees) and compact (32 bits) angular type.
The angle measured between the equatorial plane and the point along the meridian. Read more.
The angle measured on the equatorial plane between the meridian of the point and the prime meridian (Greenwich, UK). Read more.
The point on the surface of an ellipsoid, represented as the pair (latitude, longitude)
Angle with ordering, addition/subtraction operations and the abilities to construct itself from a string or a float number
Common terminology for angles: https://en.wikipedia.org/wiki/Angle#Individual_angles