| a | Semi-major axis |
| b | Semi-minor axis |
| E | [Easting] |
| f | Flattening |
| h | Ellipsoidal Height |
| H | Gravity-Related Height |
| N | [Northing] |
| λ | Geodetic Longitude |
| φ | Geodetic Latitude |
| X, Y, Z | Cartesian coordinates in a Geocentric Coordinate Reference System |
| i, j, k | Cartesian coordinates in an Engineering Coordinate Reference System, (integer or real) |