| Phi represents latitude in radians. E.g. 30° North equals to 0,52359877 and 60° South equals to -1,04719755 | |
| Lambda represents longitude in radians. E.g. 90° East equals to 1,57079632 and 180° West equals to -3,14159265 | |
| X refers to the value of a point measured on the horizontal axis of a 2 dimensional map | |
| Y refers to the value of a point measured on the vertical axis of a 2 dimensional map | |
| Beta represents "angular distance" in radians, measured from the Pole. Similar to "latitude", which is measured from the Equator. The value of Beta can not be a negative number. | |
| Phi 0 represents the latitude of the standard (or normal) parallel line in radians. | |
| Beta 0 represents the angular distance of the standard parallel in radians, measured from the Pole. | |
| If there are more than one standard paralles, then they are usually referred to as Beta 1, Beta 2. |